White 2-135 & 2-155 Tractors Complete Workshop Service Repair Manual

SHOP MANUAL MODELS 2-135 2-155 INDEX (BY STARTING PARAGRAPH) BRAKES Bleeding Adjustment Brake valve Overhaul CLUTCH Engine clutch adjustment. Engine clutch R&R Engine clutch overhaul ... COOLING SYSTEM Water pump Radiator Thermostat DIESEL SYSTEM Fuel filler Water separator Fuel system bleeding .... Governor adjust Nozzles, testing Nozzles, R&R Nozzles, overhaul Injection pump, R&R .... Injection pump, timing ... Trouble shooting Turbocharger DIFFERENTIAL Overhaul Remove and reinstall .... ELECTRICAL Alternator Regulator Starting motor — ENGINE Assembly, R&R Cam followers Camshaft Connecting rod bearings . Crankshaft and bearings . Cylinder head Flywheel Front oil seal Main bearings Oil cooler Oil pump Pistons Piston pins Piston and rod removal.. Piston rings Rear oil seal Relief valve, oil pressure Model 2-135 116 117 119 120 73 74 75 68 67 69 48 49 50 62 53 52 58 61 60 47 66A 110 108 70 70 72 18 26 31 37 38 20 41 39 38 45 42 33 36 32 33 40 44 Model 2-155 116 117 119 120 73 74 75 68 67 69 48 49 50 62 53 52 58 61 60 47 66A no 108 70 70 72 18 26 31 37 38 20 41 39 38 45 42 33 36 32 33 40 44

INDEX CONT. Model 2-135 ENGINE CONT. Rocker arms 27 Tappets 26 Timing gear cover 29 Timing gears 30 Valve guides 21 Valve springs 25 Valve timing 28 Valves and valve seats 21 FINAL DRIVE Rear axle 112 Axle carrier 112 Planetary 112 Differential 108 Wheel axle shaft 112 FRONT SYSTEM Front axle member 1 Front carrier 3 Pivot pin 1 Spindle (knuckle) 2 Tie rods & toe-in 4 HYDRAUL SHIFT 79 LIFT SYSTEM, HYDRAULIC Draft control spring, adjust 189 Draft input shaft 181 Drain and refill 150 Hitch control lever 180 Hydraulic housing 177 Lubrication and maintenance 149 Cylinder and piston 185 Manifold 184 Oil cooler 191 Oil filter 153 Filter head 154 Pump 171 Pressure relief valve 164 Quick check 137 Remote cylinders 200 Remote valves 192 Rockshaft 178 Servo valve 182 System adjustments 159 Testing 139 Trouble shooting 126 POWER STEERING 6 POWER TAKE-OFF Control valve 122 Clutch overhaul 124 PTO unit. R&R 123 TRANSMISSION Bevel pinion shaft 104 Countershaft 102 Input shaft lOO Lubrication system 91 Park lock latch 107 Reverse idler 106 Shifter rails & forks 99 Top cover 98 Model 2-155 27 26 29 30 21 25 28 21 112 112 112 108 112 1 3 1 2 4 79 189 181 150 180 177 149 185 184 191 153 154 171 164 137 200 192 178 182 159 139 126 6 122 124 123 104 102 100 91 107 106 99 98

CONDENSED SERVICE DATA Model 2-135 Model 2-155 Own 6 478 Yes Dry 7 Neg. 4.56x4.00 -1-5-3-6-24- Own 6 478 Yes Dry 7 Neg. GENERAL Engine Make Number of Cylinders Bore & Stroke-Inches Displacement-Cu. In. Cylinders Sleeved Cylinder Sleeves—Type Main Bearings, Number of Battery Terminal Grounded TUNE-UP Firing Order Valve Tappet Gap-Inlet (Cold) 0.010 0.010 Valve Tappet Gap-Exhaust (Cold) 0.025 0.025 Compression At Cranking Speed (PSI) .. 300-350 Nominal Max. Allowable Variation 25 psi Timing Mark Location Vib. dampener Timing (Static) 20° BTDC Engine Low Idle RPM 775-825 Engine High Idle RPM 2370-2420 Engine Rated RPM 2200 SIZES—CAPACITIES—CLEARANCES (Sizes and Clearances are in Inches) Crankshaft Journal Diameter 3.6210-3.6220- Crankpin Diameter 2.9970-2.9980" Camshaft Journal Diameter No. 1 (Front) 2.4285-2.4295 No 2 2.3660-2.3670 No 3 2.3035-2.3045 No! 4 1.9910-1.9920 Main Bearings, Diameter Clearance 0.0018-0.0048 Rod Bearing, Diameter Clearance 0.0014-0.0044 Cooling System—Quarts *31 Crankcase Oil—Quarts (Including Filter) 22 Transmission, Final Drive and Hydraulic System—Gallons 23 Hydraul-Shift—Quarts 37? •Including cab heater. 775-825 2370-2420 2200 *31 22 23 3V2 FRONT AXLE The adjustable front axle shown in Fig. 1 is common to both the 2-135 and 2-155 model tractors. AXLE MAIN MEMBER AND PIVOT PIN Models 2-135 and 2-155 1. To remove front axle and wheels as an assembly, support front of tractor and unbolt stay rod support (1—Fig. 1) from front main frame. Disconnect inner ends of tie rods from center steering arm. Remove pivot pin (11— Fig. 2) from front support (5) and axle, raise front of tractor and roll front axle and wheels assembly from under tractor. Remove rear pivot pin (5—Fig. 1) from rear support (1) and remove support from stay rod. Bushings (4 and 10) are renewable and if necessary should be reamed after installation to provide 0.001-0.002 diametral clearance on pivot pins. STEERING SPINDLES AND BUSHINGS Models 2-135 and 2-155 2. To remove steering spindles (30— Fig. 1) and renew bushings (17), support front axle and remove tire and wheel assembly. Remove bolts from steering arms (21), remove arms and washers (20) from spindles, then withdraw spindles from axle extensions (15). Remove thrust washers (29) from spindles. Drive bushings (17) from axle extensions and install new bushings flush witb outer ends of bore. Clearance of spindle in bushings should be 0.002- 0.006. Bushings are presized and should not require reaming if installed with a suitable piloted arbor. NOTE: In cases where item (29-Fig. 1) is a thrust bearing, it should be installed with lettering toward top end of spindle.

2-135, 2-155 FRONT AXLE CARRIER Models 2-135 and 2-155 3. Front axle carrier is shown in Fig. 2. To remove front carrier, first remove front axle as outlined in paragraph 1, Remove power steering cylinder as outlined in paragraph 16, then unbolt front support from front main frame. To remove vertical shaft (8), remove locknut (1) and retainer (2), pull vertical shaft from support and remove center steering arm (7) and washer (6). Remove seals (3) and bearings (4) from support and note location of bearings prior to removal Clean and inspect parts and renew any that show undue wear or damage. Pay particular attention to the caged bearings (4) and retainer (2). When installing new bearing, drive or press only on lettered end of bearing cage and be sure all holes in bearing cages are aligned with grease fittings when bearings are installed. Seals (3) are installed with lips toward ends of steering shaft (outward). Be sure washer (6) is located on bottom side of center steering arm (7) and that vertical shaft turns without binding when locknut (1) is tightened. Complete assembly of tractor by reversing disassembly procedure. TIE RODS AND TOE-IN Models 2-135 and 2-155 4. Tie rod ends are non-adjustable and are serviced either by renewing the end assembly or the complete tie rod assembly. Toe-in for all models is 3/16-inch. Obtain correct toe-in by adjusting each tie rod an equal amount. WHEEL BEARINGS AND SEAL Models 2-135 and 2-155 5. Refer to Fig. 3 for an exploded view of front wheel hub, bearings and seal. When installing new bearing cups (33 and 36), press them into hub until they bottom. Seal (31) is installed with lip toward inside of hub. Pack wheel bearings with V2 pound of No. 1 grade multi-purpose lithium base grease. To adjust wheel bearings, tighten nut while rotating wheel until a preload is felt on the wheel bearings, then back-off nut Until nearest slot in nut aligns with hole in spindle and install cotter pin. Bend one leg of cotter pin against spindle and the other leg against nut. POWER STEERING Models 2-135 and 2-155 6. Models 2-135 and 2-155 are equipped with power steering that utilizes a gerotor type control unit which furnishes pressurized fluid in metered amounts to actuate the front wheel steering cylinder. Fig, 1—Exploded view of adjustable front axle used on Models 2-135 and 2-155. I. Rear bracket 4. Bushing 5. Rear pivot pin 8. Grease fitting 9. Front axle 10. Bushings 11. Extension clamp 12. U Bolt 13. Lock washer 14. Nut 15. Axle extension 16. Grease fitting 17. Bushings 20. Washer 21. Steering arm 29. Thrust washer 30. Spindle Paragraphs 3-7 Hydraulic system fluid is used as power steering fluid and is furnished by hydraulic system pump via a priority valve located in the pressure control valve. LUBRICATION AND BLEEDING Models 2-135 and 2-155 7. Steering system can be considered self-bleeding and any air trapped in lines, cylinder or control unit can be eliminated by turning steering wheel to move steering cylinder, through full range of travel several times in each direction. NOTE: Prior to bleeding the power steering system, be sure the hydrauiic system is bied as outlined in paragraph 139. 3-O Fig, 2—Exploded vievf of front support and vertical steering shaft. 1. Locknut 7. Steering arm 2. ReUiner 8. Vertical shaft 3. Seal 9. Grease fitting 4. Bearing 10. ReUining pin 5. Front support 11. Pivot pin 6. Washer 12. Grease fitting Fig, 3—View of front wheel hub, bearings and seal. 31. Seal 32. Bearing cone 33. Bearing cup 34. Wheel hub 36. Bearing cup 37. Bearing cone 38. Adjusting nut 39. Cotter pin

Paragraphs 8-11 WHITE SYSTEM PRESSURE TEST Models 2-135 and 2-155 8. Steering system operating pressure should be 1775-1825 psi when checked with engine running at approx- imately 2000 rpm. To check steering system pressure, refer to paragraph 144 of HYDRAULIC LIFT section of this manual. PUMP Models 2-135 and 2-155 9. The hydraulic lift system pump also furnishes the pressurized oil for operation of the power steering system. For information on the hydraulic lift system pump, refer to paragraph 171. CONTROL UNIT Models 2-135 and 2-155 10. R&R CONTROL UNIT. Discon- nect battery ground strap. Remove cap from steering wheel, unscrew wheel retaining nut and use a puller to remove steering wheel. DO NOT ham- mer on steering shaft. Remove both lower instrument panel support side filler plates, then disconnect light switch, turn signal switch and differential lock toggle switch from lower instrument panel. Unbolt and remove lower instrument panel with grommet. Tag the four control unit hoses to facilitate reinstallation, then disconnect hoses from control unit and immediately cap all openings. Remove the flat headed carrier pivot screws and lift unit from instrument panel support. Reverse removal procedure to install control unit assembly and bleed unit as outlined in paragraph 7. NOTE: In some cases the ends of steering column door (10-Flg. 4) may contact water temperature gage or voltmeter gage terminals at extreme forward position, or differential toggle switch terminals at extreme rearward position. If this occurs, bend ends of door about 30 degreees as shown In Fig. 3A. 11. OVERHAUL CONTROL UNIT. With steering unit removed as outlined in paragraph 10, proceed as follows: Note location of spacer (11—Fig. 4) and clamp (12), then remove door (10). spacer and clamp. Remove clamp (25) from lower end of control unit. Remove cap screws which retain steering column and control unit to carrier, then pull control unit from steering column. With control valve removed, remove cap screws (22—Fig. 5), then remove end cap (21). gerotor set (20). spacer (18) and plate (19). Remove drive (17) from sleeve and spool assembly if it Fig. 3A — Bend ends of door as shown if inter- ference occurs. STEERING COIVMN DOOR . 45 41 Fig,4—View showing component parts {axcapt stearing cylindar) of system. Rafar to Fig. 5 for an axplodad view of control unit {24) and to vlaw of staering cylinder. 1. Cap 2. Nut 3. Steering wheel 4. Right support 5. Lett support 6. Clamp 9. Grommet 10. Column door 11. Spacer 12. Clamp 13. Carrier 18. TUt lever 21. Covering 22. Spring 23. Steering column 24. Control unit 25. Clamp 29. Connector 30. Connector 31. "0" ring 32. Inlet hose 33. Elbow 34. "0" ring 35. Return hose the power steering Fig, 13 for exploded 36. Return tube 37. Connector 38. "0" ring 39. Hose, upper port 40. Hose, lower port 41. Bracket 45. Clamp 49. Tie strap 6

2-135, 2-155 2Z Fig, S—Exploded view of power steering control unit 1. Retaining rin? 2. Wiper seal 3. Seal bushing 4. "0" ring 5. Quad ring 6. Bearing races 7. Thrust bearing 9. Housing 10. Spring pin 11. Steet ball(V4) 12. Threaded insert 13. Centering pin 14. Spool 15. Centeri 16. Sleeve 17. Drive ng springs 18. Spacer 19. Plate 20. Gear set {gerotor) 21. End cap 22. Cap screw wasn't removed with gerotor set. Remove snap ring (1), push upward slightly on sleeve and spool assembly to unseat bushing (3), then remove bushing, seals (2 and 4), quad ring (5) and bearing assembly (6 and 7). Remove sleeve and spool assembly from bottom (14 hole) end of housing (9). Remove spring pin (10) from "IN" port of housing and drop ball (11) from housing out through threaded insert (12). See Fig. 6. Do not remove threaded insert unless renewal is indicated. Slide centering pin (13—Fig. 5) from sleeve and spool, push spool (14) upward slightly and remove centering springs (15). Remove spool from bottom end of sleeve (16). 12. Discard all seals, clean parts in a suitable solvent and inspect. Pay particular attention to parts having matched surfaces for nicks and scratches. NOTE: If parts renewal is indicated the foUowing kits are availabie. Refer to Fig. 5 for identification. Seal kit (items 2. 4 and 5); bearing package (items 6 and 7); control parts assembly (items 9 through 16) and gerotor set (item 20). Use the following information to determine parts renewal. Width of rotor and stator of gerotor must not vary more than 0.001. Gerotor set. plate (19) and body (9) can be lapped (polished) if done carefully on a lapping plate and not more than 0.005 of material is removed from plate (19). Clearance between lobe of rotor and lobe of stator of gerotor set must not exceed 0.005 at closest point. Free height of centering springs (15) is 7/32-inch (3/16-inch minimum) and springs should return to their free height after being compressed to a height of 1/16-inch. See Fig. 7. Paragraphs 12-13 Examine check ball (11—Fig. 5) and its seat in body. Seat is not available separately. Examine needle bearing (7) and races (6) for roughness OP other damage. Spool (14) and sleeve (16) when lubricated should be a snug fit in their bores and should rotate smoothly with finger pressure. 13. Use all new seals and lubricate all parts when reassembling. Drop check ball (11) into "IN" port of body and secure with spring pin (10). See Fig. 6. Renew threaded insert, if necessary. Insert spool (14—Fig. 5) into bottom of sleeve (16) and check to see that spool rotates smoothly in sleeve. Arrange centering springs in two sets of three each, position springs so curved por- tions are back-to-back, then using special installation tool as shown in Figs. 8 and 9, compress and install springs with notched edges down. 1/4" KiY STOCK MAflKtAL • HMD aiCHTlT UNDf'l»ZI lACH Fig, 8—A tool to faciiitate installation of centering springs can be made using shown. Fig. 9—Centering springs being using special tool. Installed tlTAININO UMO Fig. 7—Centering springs must return to free height after being compressed to T/T6-/ncA as shown. Fig. $^Check ball can be removed from "IH" port after removing spring pin {retaining ring) TO 1/16 INCH HEIGHT SC/iLE FREE HEIGHT 7/32 INCH • 3/16 INCH MtNIMUM

Paragraphs 14-16 f STAR POINT POSITION m a f AK SET DItlVE SniNES TO STAR &t)VE SLOT TO m OVER P%H PtN POSITION IN HOUSING Position springs so ends are even and top edges are flush with top end of sleeve. Install centering pin (13—Fig. 5) and position so ends are slightly below outside diameter of sleeve. Insert spool and sleeve assembly into bottom (14 hole) end of body so that bottom of spool and sleeve assembly is flush with bottom end of housing. Place 14 hole end of unit on a wood block and install bearing assembly, quad seal and bushing and seal assembly. Secure bushing with snap ring (1). Invert assembly so 14 hole end is up and secure in position. Place plate (19) on body and Fig. 10—Viaw showing ra- lation of centering pin to rotor to insure corract timing of controi unit. Aiso refer to taxt. -12 align holes. Turn spool and sleeve assembly so that centering pin is crosswise to housing ports as shown in Fig. 10. Install drive (17—Fig. 5) with slot in drive over centering pin. Unit is correctly timed when centering pin is aligned with valley of rotor and a lobe of rotor is perpendicular (90 degrees) to housing ports. Position stator over rotor and align holes then insert spacer (18) in center of rotor against spiined end of drive. Install end cap (21) and tighten cap screws in alternate sequence to 250 in.-lbs. Check unit for free operation and reinstall line connectors. STEERING COLUMN Models 2-135 and 2-155 14. R&R AND OVERHAUL. To remove steering column assembly, refer to paragraph 10. To disassemble steering column, remove end cap (8—Fig. 11) and if renewal is required, remove wiper seal (9) from end cap. Pull shaft assembly from tube and flange (2), remove thrust washer (1) and pull guide bushing (7) from steering shaft (14). Drive dowel pins (4) from lower end of carrier (6) and steering shaft (14) and remove spiined shaft (3). Depress lock rod (11) and push steering shaft into carrier until steel ball (12) appears at the larger (second from bottom) hole in carrier, drop out steel ball, then remove lock rod and spring (13). Push steering shaft further into carrier so 1. Thrust washer 2. Tube and flange 3. Spiined shaft 4. Dowel pins 5. Guide pin 6. Carrier 7. Guide bushing 8. End cap 9. Wiper seal 10. Lock ring 11. Lock ro<r 12. Steel ball (3/8) 13. Spring 14. Steering shaft WHITE guide pin (5) aligns with largest hole in carrier and drive out guide pin. Remove steering shaft from carrier. 15. With unit disassembled, check all parts for wear or other damage. Remove any burrs that would prevent parts from sliding and turning freely. All parts should be lubricated with a good grade of grease during reassembly. To reassemble, slide steering shaft into carrier, then align largest holes and install guide pin with spring seat toward top of shaft. Drop spring into top of steering shaft, slide in lock shaft and position lock shaft in steering shaft so ball recess in lock shaft is aligned with larger (second from bottom) hole in steering shaft, drop in steel ball, then pull out on shaft until ball appears in one of the smaller locking holes. Force required to depress lock rod should be about 20 pounds and rod should return freely when released. Install spiined shaft in bottom of carrier and secure with dowel pins. Position dowel pins so they are slightly below outside diameter of carrier and slightly peen holes to retain dowel pins. Place guide bushing on steering shaft and install thrust washer in bottom of tube and flange. Install steering shaft and carrier assembly in tube and flange, screw lock ring and end cap on threaded end of tube and tighten end cap until there is minimum end play of steering shaft. Steering shaft must slide freely with less than 5 pounds of force. Tighten lock ring against end cap and secure end cap and lock ring in position by staking threads through small holes. STEERING CYLINDER Models 2-135 and 2-155 16. REMOVE AND REINSTALL. Drain cooling system and remove hood side panels and hood. Remove grille and headlights assembly. Disconnect hoses from hydraulic oil cooler and remove oil cooler. Disconnect inlet and outlet hoses from radiator, then unbolt and remove radiator from supports. Loosen steering cylinder line clamps, disconnect lines from power steering cylinder and immediately cap all openings. Remove cap (1—Fig 13) from REMOVE GUIDE HERE THRUST WASHER AND SNAP RING Fig. 11—Exploded viaw of staaring column assembly. Also refer to Fig, 12. Fig. 12—CrosS'S»ctional viaw showing assambtad staaring column assambly. Also rafar to Fig. 11.

2-135, 2-155 Paragraphs 17-18 steering cylinder and pry plug (7) from pinion (11). Pull pinion from splines of vertical steering shaft (in front carrier) by turning puller bolt (9) counterclock- wise. Disconnect torque link and lift steering cylinder from front frame. Reverse removal procedure to reinstall steering cylinder. The index mark on pinion (11) must be aligned with centering mark on piston (21). Tighten the puller bolt (9) to a torque of 200 ft.-lbs. Use new "0" ring (6) when Fig, 13—Exploded view of power steering cylinder assembly. For illustrative purposes unit is turned 180 degrees from actual mounting position. 1. Cap 5. "O'^ ring 6. "0" ring 7. Plug 8. Snap ring 9. Puller bolt 10. Washer 11. Pinion 12. Quad ring 13. Connectors 14. CyUnder 15. Plugs 16. Teflon rings 17. "0" rings 18. Spring pins 19. Springs 20. Check valves 21. Piston 22. "0" ring 23. End plug 24. Snap ring installing plug (7). Fill cavity around pinion with power steering fluid before installing cap (1) with new "0" ring (5). 17. OVERHAUL POWER STEER- ING CYLINDER. After removing the cylinder as outlined in paragraph 16, proceed as follows: If necessary, remove pinion from cylinder then remove snap ring (8), puller bolt (9) and washer (10) from pinion. To remove end plug retaining snap ring (24) insert pin or punch in hole in end of housing (14) and push snap ring from groove in cylinder. Grasp one of the lugs on end plug with vise-grip pliers and, with a twisting motion, pull end plug from cylinder. Remove plug sealing "0" ring (22) from end of cylinder and remove the piston (21). Remove the Teflon seals (16) and "0" rings (17) from groove at each end of piston and remove pinion sealing quad ring (12) from bottom of cylinder. If necessary to remove the check valve assembly (18, 19 and 20) from either end of cylinder, insert punch in hole from inner side of piston head and drive valve ball, spring and spring pin from piston. If the hydraulic line connector seats (13) are damaged, they may be removed by threading inside diameter of seats and using puller bolts. Carefully clean and inspect all parts and renew any that are exces- sively worn, deeply scored or damaged beyond further use. Reassemble cylinder, using all new sealing rings as follows: Insert check ball (20) into bore in end of piston (21), insert spring (19) with small end next to ball and drive the retaining spring pin (18) in flush with end of piston. Install "0" ring (17) in bottom of groove in end of piston, then install Teflon ring (16) on top of the "0" ring. Lubricate piston and install in bore of cylinder. Install "0* ring (22) in groove in open end of cylinder, lubricate and install end plug (23)* and install plug retaining snap ring (24). Install quad ring (12) in bottom of pinion bore in cylinder casting and lubricate ring and bore. Install pinion (11), and washer (10), puller bolt (9) and retaining snap ring in top of pinion. Install pinion in cylinder with timing marks on pinion and piston aligned and reinstall cylinder as outlined in paragraph 16. ENGINE AND COMPONENTS Models 2435 and 2-155 tractors use six cylinder, overhead valve diesel engines. Engines use two cylinder heads and are fitted with renewable dry type sleeves, aluminum pistons and shell-type connecting rod and main bearings. Engines have a bore and stroke of 4.56 X 4.88 inches and a displacement of 478 cubic inches. Compression ratio is 17:1 and compression pressure at cranking speed should show a nominal value of 300-350 psi. While the compression pressure at cranking speed is only a guide in that pressure will vary according to equipment used, cranking speed, altitude and etc., it is important that compression pressures do not vary more than 25 psi between cylinders. The engines in 2-135 and 2-155 tractors are equipped with a turbocharger. Engine serial number is stamped on a metal plate attached to right side of engine. R & R ENGINE WITH CLUTCH Models 2-135 and 2-155 18. NOTE: To facilitate removal of engine a special tool should be fabricated which will retain front pto shaft in position so it will disengage from flywheel pto drive hub when engine is moved forward. The special tool is made up of two parts: A 5/16-18 x 5 inch continuous thread bolt which has the end reduced to a 3/16-inch outside diameter which is a/8-inch long. See Fig. 14. Also required is a 72-14 NPT square head plug which has been di*iUed with a Size F [0.257] drill and tupped to accept the 5/16-inch bolt. Prior to removal, steam clean engine if necessary. Remove hood side panels, hood and grille side panels, then remove grille and headlights assembly. Remove air cleaner assembly. Drain cooling system and disconnect radiator hoses. Disconnect oil cooler lines at radiator and cap openings. Remove radiator, oil cooler and baffles. Free engine from instrument panel and support by disconnecting fuel lines, wiring, injection pump controls and accessory controls as necessary. Attach a hoist to front and rear engine lifting eyes, remove the four engine mounting bolts and the clutch housing to flywheel housing bolts. Install the special tool as follows: Thread the 5 inch. bolt through the drilled square head plug, if necessary. Remove pipe plug from Hydraul Shift overdrive clutch housing, then using a 1 5/8-inch socket on crankshaft pulley bolt, turn engine until hole in transmission input shaft sleeve aligns with hole in overdrive clutch housing. Re- 9

Paragraphs 19-25 lease clutch and turn engine until hole in pto shaft coupling aligns with hole in transmission input shaft sleeve. See Fig. 14. Install 5 inch bolt through overdrive housing, input shaft sleeve and pto coupling and thread square head plug into overdrive housing. Tighten 5 inch bolt to 20 ft.-lbs. NOTE: if pto coupiing hoie is not aiigned with other aiigning hoies, use 5 inch boit to move coupiing rearward against pto spacer spring pressure, if forward movement of coupiing is required, move engine forward siightiy. Use a block or other suitable means to support clutch housing and Hydraul Shift unit, then slide engine forward and lift from front frame. 19. Prior to reinstalling engine, remove clutch housing and Hydraul Shift assembly and reinstall on rear of engine. Reinstall engine by reversing removal procedure. Be sure to renew "0" ring on transmission input shaft bearing retainer and lubricate thor- oughly. Bleed power steering and fuel systems. CYLINDER HEADS Models 2-135 and 2-155 20. REMOVE AND REINSTALL. To remove cylinder heads, remove muffler, precleaner, hood side panels, hood and air cleaner. Drain cooling system. Disconnect coolant temperature gage sending unit. Remove intake and exhaust manifolds. Remove breather tube and adapter. Remove thermostat housing, hoses and water manifolds. Remove injector high pressure lines and leak-off lines and cap all openings. Remove injectors. Remove valve covers, rocker arms assemblies and 1/2-M NPT SQUARE HEAD PLUG push rods, then remove cylinder head stud nuts and lift cylinder heads from cylinder blocks. When reinstalling cylinder heads. White Farm Equipment recommends that the cylinder head nut tightening operation be accomplished in four steps. Refer to Fig. 15 for sequence, then make initial tightening to 40 ft.-lbs., second tightening to 80 ft.-lbs., third tightening to 130 ft.-lbs., and fourth tightening to 160 ft.-lbs. Operate engine for two hours, re- torque cylinder head nuts and readjust valve clearance. Use White special tools STA-176 and STA-177 to tighten cylinder head stud nuts when rocker arm assemblies are installed. VALVES, GUIDES AND SEATS Models 2-135 and 2-155 21. Both intake and exhaust valves have a face and seat angle of 45 degrees. Valve stem diameter for intake valves is 0.4361-0.4369 with a minimum diameter of 0.4356. Valve stem diameter for exhaust valves is 0.4344-0.4352 with a minimum allowable diameter of 0.4339. Maximum allowable valve face run-out is 0.002. Operating clearance of intake valves in guides is 0.0019-0.0033 with a maximum allowable clearance of 0.0045. Operating clearance of exhaust valves in guides is 0.0036-0.0050 with a maximum allowable clearance of 0.0062. Renew valves and/or guides when these clearances are exceeded. 22. The cast iron valve guides are a straight type and renewable. Drive or press old guides out of cylinder head. Install new guides from top side of cylinder head and if using guide driver 5/16-18 ^ 5" CONTINUOUS 1HREAD t>OlT OVEfcURIVE CLUTCH HOUSING ' "' /^- -'OVER/UNDER OUTPUT SHAfT TO |M-TRANSMISSION INPUT SHAFT SIECVE WHITE (White ST-178 and a 0.50 spacer), guide is correctly installed when driver bottoms on cylinder head. If driver ST-178 and spacer is not available, guide is correctly installed when top of guide is 1.260 inch above counterbore in cylinder head. Bore diameter of new guide is 0.4388-0.4394 with a maximum allowable diameter of 0.4406. 23. Valve seat inserts are used for all valves and when renewing seat inserts, shrink them with dry ice prior to installation. Valve seat angle is 45 degrees and seat width is 1/8-inch for intake valves and 7/64-inch for exhaust valves. Valve seat should contact center of valve face and run-out should not exceed 0.002. Seats can be nar- rowed using 20 and 60 degree stones. Adjust valve clearance cold to 0.010 for intake valves and 0.025 for exhaust valves. Recheck valve clearance after cylinder head has been retorqued. VALVE ROTATORS Models 2-135 and 2-155 24. Exhaust valves are equipped with a positive type rotator. While these rotators cannot be serviced, they should be observed while engine is running to be sure that valve rotates slightly each time valve opens. Renew rotator of any valve which fails to rotate. VALVE SPRINGS Models 2-135 and 2-155 25. All valves use two valve springs each and outer springs are wound with damper coils. Outer springs are installed with damper coils next to cylinder head. Free length of outer spring is 2.610 inches and spring should test 153.7- 167.7 pounds when compressed to a length of 1.67 inches. Free length of inner spring is 2.110 inches and spring should test 81.5-91.5 pounds when compressed to a length of 1.33 inches. Renew any spring which does not meet specifications, has ends that are not square, is discolored by heat, or shows any signs of fractures. PTO SHAFT COUPIING 4—Use special tool fabricated to dimensions shown when removing angina. Rafer to taxt for procadura. Fig. IS—Tighten cylinder head stud nuts In sequence shown. Four steps are required In tightening operation. Refer to text. 10

2-135, 2-155 Paragraphs 26-31 VALVE LIFTERS (CAM FOLLOWERS) Models 2-135 and 2-155 26. The straight type valve lifters operate directly in machined bores in the cylinder block. Valve lifters are supplied only in standard size of 1.2475- 1.2480 and should have an -operating clearance of 0.0033-0.0043 in their bores. Renew valve lifters if their diameter is less then 1.2425. If diametral clearance with new lifter in bore exceeds 0.007, renew cylinder block. Valve lifters can be removed after rocker arm assemblies, push rods and engine side covert are removed. VALVE ROCKER ARMS AND SHAFTS Models 2-135 and 2-155 27. To remove rocker arms, remove muffler, precleaner, hood sides and hood. Remove air cleaner assembly. Remove adapter and breather tube. Remove rocker arm covers, then unbolt and remove rocker arms assemblies. Lift out push rods and inspect. To disassemble rocker arms assemblies, remove snap rings and washers from ends of shafts, then remove pins from ends of shafts and slide rocker arms, springs and supports from shaft. Remove plugs from ends of shaft if they show signs of leakage. Rocker shaft diameter is 0.9998-1.0005 with a reject diameter of 0.9978. Inside bore of rocker arm is 1.0007-1.0038 and should have an operating clearance of 0.0002-0.004 on shaft. If rocker arm operating clearance exceeds 0.005, renew rocker arm and/or shaft as rocker arm bushings are not available separately. Rocker arm contact radius can be refaced providing the original radius is maintained and kept parallel with the rocker arm shaft. Shaft springs have a free length of 3.500 inches and should exert 7.8-9.8 lbs. when compressed to a length of 2.00 inches. VALVE TIMING Models 2-135 and 2-155 28. Valves are correctly timed when punch marked tooth space of camshaft is meshed with punch marked tooth of crankshaft gear as shown in Fig. 16. Refer to injection pump section for information concerning injection pump drive gear. TIMING GEAR COVER Models 2-135 and 2-155 29. To remove timing gear cover, first remove radiator as outlined in paragraph 67. Remove fan and fan belts, then remove tachourmeter adapter and drive from timing gear cover. Remove lock plate from crankshaft pulley cap screw, remove cap screw, they use a puller to slide crankshaft pulley forward on crankshaft. Do not damage vibration dampener by pulling on dampener. If front support and steering interfers with removal of crankshaft pulley, the vibration dampener can be unbolted and separated from pulley before completing removal from crankshaft. NOTE: Check timing marks on vibration dampener and crankshaft puiley to be sure marks are aligned, if marks are not exactly aligned, renew dampener during reassembly. Loosen oil pan retaining cap screws to allow oil pan to drop and as front end of oil pan is lowered, carefully separate oil pan gasket from lower edge of timing gear cover. Remove timing gear cover from cylinder block. Crankshaft front oil seal can now be removed. New seal is installed with lip facing rearward. Use new gasket and reinstall timing gear cover by reversing the removal procedure. NOTE: If oil pan gasket was damaged during timing gear cover removal, carefully cut a new oil pan gasket to fit exposed portion of oii pan flange and use sealant at comers where oil pan, timing gear cover and cyiinder block meet. Tighten vibration dampener retaining cap screws to 30-35 ft.-lbs. torque and crankshaft pulley retaining cap screw to 225-250 ft.-lbs. torque. TIMING GEARS Models 2-135 and 2-155 30. Timing gear train consists of two helical gears and the injection pump drive gear. In addition, the engine oil pump is driven from the crankshaft gear via an idler gear. See Fig. 16. Recommended gear backlash is 0.002- 0.004 between crankshaft gear and \ Fig. IS—Valves are correctly ffm«d when timing marks are aligned as shown. camshaft gear with a maximum allowable backlash of 0.005. Recommended backlash between crankshaft gear and idler gear is 0.004-0.006 with a maximum allowable backlash of 0.007. If any timing gear requires renewing, all gears must be renewed. If service is required on idler gear, the engine oil pan must be removed to provide clearance to slide idler gear from shaft. Prior to removing camshaft gear set engine on TDC and mark camshaft gear in relation to injection pump gear so injection pump timing can be maintained during assembly. CAMSHAFT Models 2-135 and 2-155 31. REMOVE AND REINSTALL. To remove camshaft, remove timing gear cover as outlined in paragraph 29. Remove air cleaner, breather tube and adapter, rocker arm covers, rocker arms and push rods. Remove injector lines. Remove oil filters and cooler assembly from side of engine. Discon- nect fuel filters from side of engine. Remove engine side covers and lift out cam followers. Set engine at TDC and mark camshaft gear in relation to injection pump drive gear. Turn engine until thrust plate <:^p screws can be reached through holes in camshaft gear, then remove the thrust plate cap screws and pull camshaft and camshaft gear from cylinder block. If necessary, camshaft gear can now be removed from camshaft. Camshaft bushings are presized and if carefully installed will not require align boring. Check camshaft and camshaft bushings against the following data: Camshaft end play 0.006-0.015 Thrust plate thickness 0.240-0.242 Journal diameters Front 2.4285-2.4295 Second 2.3660-2.3670 Third 2.3035-2.3045 Fourth 1.9910-1.9920 Bushing I.D. Front 2.4315-2.4325 Max. allowable 2.4355 Second 2.3690-2.3700 Max. allowable 2.3730 Third 2.3065-2.3075 Max. allowable 2.3105 Fourth 1.9940-1.9950 Max. allowable 1.9980 Bushing Width First 1.12 Second 1.00 Third .1.00 Fourth 1.26 Camshaft operating Clearance 0.002-0.004 Max. allowable 0.006 11

White 2-135 & 2-155 Tractors Complete Workshop Service Repair Manual

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