International Harvester 766 Tractor Full Service Repair

INTERNATIONAL HARVESTER Models H454 H464 m484 W574 H 584 H674

SHOP MANUAL Engine serial number is stamped on left side of engine crankcase on all nondiesel series. Engine serial number is stamped on right side of engine crankcase on all diesel series. Tractor serial number is stamped on name plate attached to left side of speed transmission housing on Models 454, 464, 574 and 674 or on the right rear side of front axle support on Models 484 and 584. INDEX (By Starting Paragraph) 454, 464, 574, 484 674 Diesel Non-Diesel 574, 674, 584 Diesel 454, 464 Non-Diesel BRAKES Bleed. ............................ 153 Master Cylinder ................... 155 Pedal Adjustment ................. 152 R&R and Overhaul ................ 154 CARBURETOR Gasoline ............... CLUTCH, ENGINE Adjustment ....................... 123 123 123 Remove and Reinstall. ............. 124 124 124 COOLING SYSTEM Fan .............................. Radiator .......................... Water Pump ...................... DIESEL FUEL SYSTEM Ether Starting Aid ................ ... 99 ... Filter and Bleeding ................ ... 89 ... Injection Pump. ................... ... 90 ... Injection Pump Timing. ............ ... 91 ... Nozzles ........................... ... 95 ... DIFFERENTIAL .................... ELECTRICAL SYSTEM Alternator and Regulator. .......... Magnetic Pulse Ignition ............ Standard Ignition. ................. Starting Motor .................... ENGINE Cam Followers .................... ......................... Camshaft Connecting Rods & Brgs.. .......... Crankshaft ........................ Crankshaft Oil Seals ............... Cylinder head ..................... Cylinder Sleeves .................. Engine Removal. ..................

INDEX CONT . 454. 454. 464. 464 484 Non-Diesel Diesel 574. 674. 584 Diesel 574. 674 Non-Diesel ENGINE CONT . Flywheel ......................... Ignition Timing .................... Injection Timing ................... Main Bearings ..................... Nozzle Sleeves .................... ......................... Oil Pump ................... Pistons & Rings Piston Pins ....................... ................... Piston Removal Rocker Arms ...................... ................ Timing Gear Cover Timing Gears ..................... Valves and Seats .................. Valve Guides & Springs ............ Valve Timing ..................... MAIN DRIVE BEVEL GEARS AND DIFFERENTIAL Adjustment Carrier Bearings ....... 142.143 R&R Bevel Gears .................. 145 R&R Differential .................. 146 Differential Lock .................. 147 Planetary & Rear Axles ............ 148. 149 FRONT SYSTEM Axle Main Member ................ 1 Steering Knuckles ................. 3 Tie Rods .......................... 2 GOVERNOR (Non-Diesel) ............ 100 HYDRAULIC SYSTEM .................. Auxiliary Valves Cylinder and Valve Unit ............ Pump ............................ R&R Lift Unit .................... Test and Adjust ................... Trouble Shooting .................. POWER STEERING SYSTEM Cylinder .......................... Flow Divider ...................... ............. Lubrication & Bleeding ......................... Oil Cooler Flow & Pressure Tests ............. Pump ............................ ............. Steering Control Valve .............. Steering Relief Valve POWER TAKE-OFF ............... Linkage Adjustment 158 ................ Operating Pressure 159 R&R and Overhaul ................ 160. 162 TRANSMISSION. RANGE Linkage Adjustment ............... 135 R&R and Overhaul ................ 136 Lubrication Pump ................. 131 TRANSMISSION. SPEED Linkage Adjustment ............... 125 R&R and Overhaul ................ 127. 128

CONDENSED SERVICE DATA GENERAL Engine Make. ....................... Engine Model ....................... ................. Number of Cylinder. Bore-Inches ......................... Stroke-Inches ....................... Main Bearing. Number of. ............ .................... Cylinder Sleeves Forward Speeds, Number of. ......... ............. Alternator/Starter Make (1) 454-C157, 4644175 (2) 45433/8, 4643-9/16 454, 464 Non-Diesel 454, 464, 484 Diesel IH D-179 3 3-7/8 5-1/16 4 Wet 8 574, 674 Non-Diesel IH C-200 4 3-13/16 4-25/64 3 ... 8 Delco-Remy and Lucas 574, 674 Diesel IH D-239 4 3-7/8 5-1/16 5 Wet 8 TUNE-UP Compression Pressure ............... 170 (1) 315340 (1) 185 (1) 315340 (1) Firing order ........................ 134-2 13-2 13-4-2 13-4-2 Valve Tappet Gap (Hot) Intake ............................ 0.027 0.010 0.027 0.010 Exhaust ..................... 0.027 0.012 0.027 0.012 Valve Seat Angle (Degrees) ....... 30 45 30 45 ............ ... Ignition Distributor Make (2) (2) ... ........................ Breaker Gap 0.020 ... 0.020 ... Distributor Timing .................. See Para. 115 ... See Para. ... 115,117 Timing Mark Location ............... Crankshaft Pulley Spark Plug Electrode Gap. ........... 0.023 ... 0.023 ... Carburetor Make .................... M-S ... M-S or Zenith ... Injection Pump Make ................ ... Robert Bosch ... Robert Bosch Injection Pump Timing. .............. ... 14OBTDC ... 14OBTDC Battery Terminal, Grounded .......... Negative Engine Low Idle RPM ............... 625 750 625 700 Engine High Idle RPM, No Load ...... See Para. 101 See Para. 93 See Para. 101 See Para. 93 Engine Full Load RPM. .............. (3) (3) (3) (3) (1) Approximate psi, at sea level, at cranking speed. (2) Delco-Remy or Prestolite. (3) 454,484, 574-2200 rpm; 464.674-2400 rpm; 584-2300 rpm. SIZES-CAPACITIES-CLEARANCES Crankshaft Main Journal Diameter 2.748-2.749 .................. Crankpin Diameter (1) Camshaft Journal Diameter No. 1 (Front) ...................... 2.089-2.090 NO. 2 ............................. 2.069-2.070 NO. 3 ............................. 1.499-1.500 No.4 ............................. ... No.5 ............................. ... Piston Pin Diameter ................. (2) Valve Stem Diameter Intake ............................ 0.37154.3725 Exhaust .......................... 0.3714.372 Main Bearing Diametral Clearance .... 0.00124.0042 Rod Bearing Diametral Clearance ..... (3) Piston Skirt Diametral Clearance. ..... 0.0024.005 Crankshaft End Play. ................ 0.0054.010 Camshaft Bearing Diametral Clearance 0.00054.005 Camshaft End Play .................. 0.0024.010 Cooling System Capacity-Qts. ......... 11.5 Crankcase Oil-Qts. ................... 7 Transmission and Differential-Gallons . . 9 (1) 454, 2.059-2.060; 464, 2.373-2.374 (2) 454,0.8591-0.8593; 464,0.87484.8749 (3) 454, 0.00094.0039; 464, 0.00094.0034 584 P Diesel IH D-206 4 3-7/8 43/8 5 Wet 8 ... Robert Bosch 14OBTDC f-' 750 See Para. 93 (3)

Paragraphs 1-3 pull arm from steering knuckle. Re- Ro SYSTEM move the Woodruff key and lower the AXLE TYPE steering knuckle assembly from axle extension. Remove thrust bearing (4) and felt washer (7). Hub and wheel bearings can now be removed if neces- FRONT SYSTEM AXLE TYPE sarv. Inspect bushings (2) and renew as re- TWOtypes of front axles are available; quired. Install new bushings with open the swept back adjustable (Fig. 1) and ends of lubrication grooves inward. the straight adjustable (Fig. 2). Press bushings in until they are 1/16- AXLE MAIN MEMBER inch below flush with top and bottom surface of extension bore. Install thrust bearing (4) with chamfered side downward. Pack wheel bearings using IH251H EP or equivalent No. 2 lithium grease. Tighten bearing adjusting nut while rotating the hub to 70 ft.-lbs. torque. Back the nut off and retorque to 50 ft.- lbs. Back nut off %-turn from this position and install cotter pin. The balance of reassembly is the re- verse of disassembly procedure. All Models * 1 - 1. To remove either the swept back or straight axle main member (10-Fig. 1 or Fig. 2), disconnect tie rods from steering arms (1 and 17). Identify and Fig. view of disconnect steering lines- Cap or plug the swept back adjustable openings immediately to prevent en- front axle assembly. trance of dirt or other foreign material 1. sbring RH. I 2. Bushings into the system. Unbolt and remove 3. Axle extension RH. the cylinder retaining bracket (15) and 4. nrust bearing 5. Steering knuckle remove the cylinder rod anchor pin. s. Key aref fully lower cylinder, steering arm 7. Felt washer and tie rods from axle. Support front of : kx$g'," pin tractor, remove axle adjusting bolts lo. Axle main member (12) and withdraw axle extensions (3 :;: exg bolt ,*, and 16), steering knuckles and front 13. Bushings wheels as assemblies. Place a floor jaek ::: ~~~,"~~,g~rBeket under axle main member (10). unbolt 16. Axle extension L.H. and remove axle pivot pin (8), then ::: ~ ~ ~ p " l a ~ L.H. lower axle main member from front g: gtgrt support (19). Inspect pivot pin (8) and bushings (9, 11 and 13) and renew as required. Re- install by reversing the removal procedure and if necessary, adjust toe-in as outlined in paragraph 2. TIE RODS AND TOE-IN All Models 2. The procedure for removal and disassembly of the tie rods on all models is obvious after an examination of the units. Tie rod ends are non-adjustable and faulty units will require renewal. Adjust toe-in on all models to '14- inch, plus or minus l/l6-inch. Adjust- ment is made by varying the length of Fig. 2-Exploded view of the tie rods. Both tie rods should be the straight adjustable adjusted an equal amount with not front ax" assembly. Refer more than one turn difference when ad- to Fig. 1 for legend. justment is complete. STEERING KNUCKLES All Models Q 3. To remove either steering knuckle (6-Fig. 1 or Fig. 21, jaek up under axle extension and remove front wheel. Dis- connect tie rod from steering arm, remove steering arm retaining bolt and

Paragraphs 4-5 HYDROSTATIC STEERING SYSTEM NOTE: The malntenance of absolute cleanliness of all parts Is of utmost importance in the operation and servicing of the hydrostatic steering system. Of Fig. 3-Schematic view showing general lay- out of component parts of typical power steering system on International tractors. Ross hand pump and steering valve (3) is used on Models 454, 464, 574 and 674. Dan- foss pump and steering valve (7) in inset is used on Models 484 and 584. INTERNATIONAL HARVESTER equal importance is the avoidance of is controlled at a lower pressure by the nicks or burrs on any of the working pto regulating valve. If pto is engaged, parts. the fluid flows to the pto clutch assembly with excess fluid going to oil cooler. P STEERING FLUID CIRCUITS If pto is in disengaged position, the power steering fluid returns to oil cool- All Models er, which is protected by a bypass 4. Power steering is standard equip- valve. ment on all tractors and is similar ex- cept for the hand pump and steering LUBRICATION AND BLEEDING valve assembly. Refer to Fig. 3 for view showing the All Models relative position of power steering com- ponents. The 12.5 gpm (Model 584) or 5. The tractor rear frame serves as a 12 gpm (all other models) hydraulic common reservoir for all hydraulic and pump is mounted on inside of multiple lubrication operations. The filter ele- control valve, Fig. 4. Fluid passes from ment, shown in Fig. 4, should be re- the pump to a priority type flow newed at 10 hours, 100 hours, 200 divider valve which supplies a con- hours and then every 200 hours of trolled flow of approximately 3 gpm to operation thereafter. Hydraulic fluid the power steering. The return flow should be drained and new fluid added from the power steering is returned every 800 hours, or once a year, which- back to the multiple control valve and ever occurs first. Fig. 5- View showing Flo- Rater connected for test- ing hydraulic flow and pressure. A. Power steering pressure (outlet) B. Hitch pressure (outlet) C. Hitch return 1. Cap 2. Steering wheel 5. Anchor clevis 3. Hand pump (Ross) 6. Steering cylinder 4. Cylinder hoses 7. Hand pump (Danfoss) Fig. 6-Multiple control valve removed and showing control valves removed from their bores. A. Pto valve B. Pto pressure regidatin valve C. System relief valve (400- 2500 psi) D. Flow divider E. Check valve power steering Fig. 4-Multiple control valve, hydraulic pump and filter located on left side of clutch housing. 1. Multiple control 7. Seal valve 8. Filter element 2. Gasket 9. Filter by-pass valve 3. Plate 10. Gasket 4. Gasket 11. Cover 5. Pump 12. "0 ring 6. Gear 13. Bolt return F. Power steering relief valve (1500-1600 si) G. By-pass vage (oil cooler)

SERlES 454-464-484-574-584-674 Paragraphs 6-1 4 Only IH "Hy-Tran" fluid should be used and level should be maintained at n the "FULL mark shown on level gage (dipstick). The dipstick is located on left front side of rear frame. I Whenever power steering lines have ~ been disconnected, or fluid changed, ~ start engine and cycle power steering I system from stop to stop several times to bleed air from system. Then, check I and if necessary, add fluid. I i HYDRAULIC FLOW AND PRESSURE TEST I All Models ~ 6. A flow and pressure test can be made with a Flo-Rater or equivalent. Refer to Fig. 5 and connect inlet of Flo- I Rater to the outlet of the power steering and hitch. Then, connect outlet of Flo-Rater to the return port from the hitch as shown. 7. HYDRAULIC PUMP. To check the pump free flow run engine at rated rpm (2200 on Models 454, 574 or 484, 2900 on Model 584 or 2400 on Models 464 and 674). Restrict the Flo-Rater to 1250 psi and there should be a 12.5 gpm flow on Model 584 or a 12 gpm flow on all other models. If pump free flow is not as specified, p remove and service pump as outlined in paragraphs 12 and 13. 8. STEERING RELIEF VALVE. To check the relief valve, restrict the Flo- Rater to 1500-1600 psi; at this point the valve should open. If pressure is not as specified, renew the relief valve assembly (F-Fig. 6) in the multiple control valve. 9. FLOW DIVIDER. To check the flow divider, restrict the Flo-Rater to 1500-1600 psi; approximately 2% gpm Fig. 7-Exploded view of Cessna hydraulic pump. 7. Protector gasket 1. Pump body (thin) 2. Thrust plate 8. Diaphragm seal 3. Drmmg gear 9. '0" ring 4. Driven gear 10. Seal 5. Dia hragm 11. Cover S. B J - u p gasket 12. B~U, (thick) 13. Sprmg flow loss should occur when relief valve opens. If flow is not as specified, remove the flow valve (D-Fig. 6) in the multiple control valve and service by renewing parts. HYDRAULIC PUMP All Models 10. Tractors may be equipped with either Cessna (Fig. 7) or Plessey (Fig. 8) gear type pumps. Pump used on Model 584 is 12.5 gpm and pumps used on all other models are 12 gpm. A priority type flow divider takes approximately 3 gpm for the power steering and the balance is used for the draft, position and auxiliary valves in the hydraulic system. 11. REMOVE AND REINSTALL. To remove the hydraulic pump, drain all compartments of Hy-Tran and remove hydraulic filter. Disconnect all lines to Multiple Control Valve (MCV) and plug or cap openings. Disconnect pto linkage. Unbolt and remove MCV and pump. Remove cap screws securing pump to MCV. NOTE: There are copper sealing washers under pump mounting cap screws. 12. OVERHAUL [CESSNA]. With pump removed from MCV, proceed as follows: Remove pump drive gear and key, then unbolt and remove cover (11-Fig. 7) from body (1). Balance of disassembly will be obvious after an examination of unit. When reassembling, use new diaphragm, gaskets, back-up gasket, diaphragm seal and "0 ring. With open part of diaphragm seal (8) toward cover (ll), work same into grooves of cover using a dull tool. Press protector gasket (7) and back-up gasket (6) into relief of diaphragm seal. Install check ball (12) and spring (13) in cover, then install diaphragm (5) inside the raised lip of the diaphragm seal and be sure bronze face of diaphragm is toward pump gears. Dip gear and shaft assemblies in oil and install them in cover. Position thrust plate (2) in pump body with bronze side toward pump gears and cut-out portion toward inlet (suc- tion) side of pump. Install pump body over gears and shafts and install retaining cap screws. Torque cap screws evenly and alternately to 40 ft.-lbs. Check pump rotation. Pump will have a slight amount of drag but should turn evenly. Pump gears and shafts, are available only as a pump assembly. 13. OVERHAUL [PLESSEY]. With pump removed from MCV, proceed as follows: Remove pump drive gear and key, then unbolt and remove covers (1 and 9-Fig. 8) from body. Balance of disassembly will be obvious after an examination of unit. With pump disassembled, inspect all parts for burrs, scoring, wear or other damage. I Use all new seals, backing strip, and "0 ring, which are available only as a seal package. Any other parts are available only as a pump assembly. Reassemble by reversing the disassembly procedure. STEERING CONTROL VALVE Models 454-464-574-674 14. REMOVE AND REINSTALL. To remove steering control valve, first remove cap (monogram) from steering wheel, remove nut, attach puller and remove steering wheel. Remove hood and side sheets, tunnel cover, batteries and instrument panel side covers. On diesel tractors, remove fuel shut off knob. On nondiesel tractors, remove choke knob and disconnect from back of panel. Identify and disconnect the four hydraulic lines from steering control valve. Plug and cap openings to prevent entrance of dirt in system. Re- move the bolts securing the instrument panel to battery box and the front cap- screws only on each side securing the steering pedestal to clutch housing and tilt pedestal rearward. Loosen the throttle indicator Allen screw and disconnect the throttle linkage inside Fie. 8-Exploded view of 6-23 6 \ fiessey hydraulic pump. J&,)lA 1. Cover 2. Backing strip 3. Sealing ring 4. Backing strip 5. Bearings 6. Gear assy. 7. Woodruff key 8. Pump body 9. Cover in Seal 12. '0" ring 13. "0 ring - - . - --- 11. Seal Retainer

INTERNATIONAL HARVESTER steering eolumn. With throttle shaft NOTE: Lapped surfaces of end cover card seal ring (10). Slide upper cover between high and low speed, push the (38), commutator set (33 and 34), mani- assembly from input shaft and remove handle d ~ w n to compress the spring. fold (32). stator-rotor set (31), spacer Teflon spacer (16). Remove shims (12) Clamp the shaft using vise grip pliers, (29) and valve body (25) must be pro- from cavity in upper cover or from face then drive the two bottom roll pins out. tected from scratching, burring or any of thrust washer (14) and note number Release the vise grip pliers and remove other damage as sealing of these parts of shims for aid in reassembly. Remove the remaining roll pin. Remove the four depends on their finish and flatness. snap ring (41, stepped washer (51, brass cap screws securing instrument panel washer (61, Teflon washer (7) and seal to the support assembly and move the Remove seal retainer (35) and seal (8). Retain stepped washer (5) and snap panel to the side. Remove the cap (361, then carefully remove washer (371, ring (4) for reassembly. Do not remove screws securing steering control valve commutator set (33 and 34) and mani- needle bearing (11) as it is not serviced and remove valve. fold (32). Grasp spacer (29) and lift off separately. Reinstall by reversing the removal the spacer, drive link (30) and stator- Remove snap ring (13), thrust wash- procedure; then bleed hydraulic system rotor set (31) as an assembly. Separate ers (14) and thrust bearing (15) from as outlined in paragraph 5. spacer and drive link from stator-rotor input shaft. Drive out pin (18) and set. withdraw torsion bar (21) and spacer 15. OVERHAUL. To disassemble the Remove unit from vise, then clamp (20). Place end of valve spool on top of removed steering control valve assem- fitting in vise so that input shaft is bench and rotate input shaft until drive bly, refer to Fig. 9 and proceed as fol- pointing upward. Remove water and ring (19) falls free, then rotate input lows: Install a fitting in one of the four dirt seal (2) and felt seal (3). Place a shaft clockwise until actuator ball (23) ports in valve body (251, then clamp light mark on flange of upper cover (9) is disengaged from helical groove in in- fitting in a vise so that input shaft (17) and valve body (25) for aid in reassem- put shaft. Withdraw input shaft and re- is pointing downward. Apply match bly. Unbolt upper cover from valve move actuator ball. Do not remove ac- marks across end cover and valve body body, then grasp input shaft and re- tuator ball retaining spring (24) unless for aid in reassembly. Remove cap move input shaft, upper cover and renewal is required. screws (39) and end cover (38). valve spool assembly. Remove and dis- Remove plug (28) and recirculating ball (26) from valve body. Thoroughly clean all parts in a suitable solvent, visually inspect parts and renew any showing excessive wear, scoring or other damage. If needle bearing (11) is excessively Fig. 9-Exploded view of worn or otherwise damaged, renew ROSS steering control valve upper cover assembly (9) as bearing is ,- assembly used on Models not serviced separately. 454, 464, 574 and 674. In- Using a micrometer, measure thick- set "'" vane and ness of the commutator ring (=-Fig. vans spring used in slot on each rotor lobe. 9) and commutator (34). If commutator ring is 0.0015 inch or more thicker than 2. Water & dirt seal commutator, renew the matched set. Place the stator-rotor set (31) on the 5. Stepped washer 6. Brass washer lapped surface of end cover (38). Make 7. Teflon washer certain that vanes and vane springs are 9. Cover (upper) installed correctly in slots of the rotor. 10. Seal ring Arched back of springs must contact 11. Needle bearing 12. Shims 13. Snap ring 14. Thrust washers 15. Thrust bearing 19. Drive ring 20. Spacer 21. Torsion bar 22. Valve spool 28. Plug B. Spacer plate 30. Drive link 31. Stator-Rotor set 32. Manifold 33. Commutator ring 34. Commutator 35. Seal retainer 36. Seal 37. Washer 38. End wver 39. Cap screws V Fig. 10-With rotor positioned in stator as shown, clearances (C) must not exceed 0.006 inch. Refer to text.

SERl ES 454-464-484-574-584-674 Paragraphs 16-1 7 vanes. See inset X-Fig. 9. Position lobe of rotor in valley of stator as shown at (V-Fig. 10). Center opposite lobe on crown of stator, then using two feeler gages, measure clearance (C) between rotor lobes and stator. If clearance is more than 0.006 inch, renew stator-rotor assembly. Using a micrometer, measure thickness of stator and rotor. If stator is 0.002 inch or more thicker than rotor, renew the assembly. Stator, rotor, vanes and vane springs are available only as an assembly. Before reassembling, wash all parts in clean solvent and air dry. All parts, unless otherwise indicated, are installed dry. Install recirculating ball (26-Fig. 9) and plug (28) with new "0 ring (27) in valve body and tighten plug to a torque of 10-14 ft.-lbs. Clamp fitting (installed in valve body port) in a vise so that top end of valve body is facing upward. Install thrust washer (14). thrust bearing (15), second thrust washer (14) and snap ring (13) on input shaft (17). If actuator ball retaining ring (24) was removed, install new retaining ring. Place actuator ball (23) in its seat inside valve spool (22). Insert input shaft into valve spool, engaging the helix and actuator ball with a counterclockwise motion. Use the mid- section of torsion bar (21) as a gage between end of valve spool and thrust washer, then place the assembly in a vertical position with end of input shaft resting on a bench. Insert drive ring (19) into valve spool until drive ring is engaged on input shaft spline. Remove torsion bar gage. Install spacer (20) on torsion bar and insert the assembly into valve spool. Align crossholes in torsion bar and input shaft and install pin (18). Pin must be pressed into shaft until end of pin is about 1132-inch below flush. Place spacer (16) over spool and install spool assembly into valve body. Position original shims (12) on thrust washer (141, lubricate new seal ring (10). place seal ring in upper cover (9) and install upper cover assembly. Align the match marks on cover flange and valve body and install cap screws finger tight. Tighten a worm drive type hose clamp around cover flange and valve body to align the outer dia- meters, then tighten cap screws to a torque of 18-22 ft.-lbs. NOTE: If either input shaft (17) or upper cover (9) or both have been renewed, the following procedure for shimming must be used. With upper cover installed (with original shims) as outlined above, invert unit in vise so that input shaft is pointing downward. Grasp input shaft, pull downward and prevent It from rotating. Engage drive link (30) spllnes in valve spool and rotate drive link until end of spool is flush with end of valve body. Remove drive link and check alignment of drive link slot to torsion bar pin. Install drive link until its slot engages torsion bar pin. Check relationship of spool end to body end. If end of spool is within 0.0025 inch of being flush with end of body, no additional shimming is required. It not within 0.0025 inch of being flush, remove cover and add or remove shims (12) as necessary. Reinstall cover and recheck spool to valve body position. With drive link installed, place spacer plate (29) on valve body with plain side up. Install stator-rotor set over drive link splines and align cap screw holes. Make certain vanes and vane springs are properly installed. In- stall &mifold (32)' with circular slotted side up and align cap screw holes with stator, spacer and valve body. Install commutator ring (33) with slotted side up, then install commutator (34) over drive link end making certain that link end is engaged in the smallest elon- gated hole in commutator. Install seal (36) and retainer (35). Apply a few drops of hydraulic fluid on commutator. Use a small amount of grease to stick washer (37) in position over pin on end cover (38). Install end cover making sure that pin engages center hole in commutator. Align holes and install cap screws (39). Alternately and progres- sively tighten cap screws while rotat- Fig. 11-View of steering valve (hand pump) removed from Model 484 or 584. 1. Mateh marks 2. Valve housing 3. Steering mlumn & shaft assy. ing input shaft. Final tightening should be 18-22 ft.-lbs. toraue. Relocate the unit in vise so input shaft is up. Lubricate new seal (8) and carefully work seal over shaft and into bore with lip toward inside. Install new Teflon washer (7). brass washer (6) and stepped washer (5) with flat side up. Install snap ring (4) with rounded edge inward. Place new felt sea? (3) and water and dirt seal (2) over input shaft. Remove unit from vise and remove fitting from port. Turn unit on its side with hose ports upward. Pour clean hydraulic fluid into inlet port, rotate input shaft until fluid appears at outlet port, then plug all ports. Models 484-584 1 16. REMOVE AND REINSTALL. To remove steering control valve, remove access panel from top of hood, lower side panels from instrument panel, battery and battery tray. Remove steering wheel cap and nut. Using a suitable puller, remove steering wheel. Identify and disconnect the four hydraulic lines from steering valve. Immediately plug or cap all openings to prevent dirt or other foreign material from entering system. Working through opening in instrument panel along side of steering column, remove steering valve mounting bolts and remove the assembly. Reinstall by reversing the removal ~rocedure. then bleed air from svstem i s outlined in paragraph 5. 17. OVERHAUL. Clean exterior of unit and scribe match marks on end plate, rotor plate, distributor plate and valve housing as shown in Fig. 11. Unbolt and remove steering column and shaft (3) from steering valve. Clamp valve housing in a soft jaw vise in inverted position and remove end plate cap screws (25 and 26-Fig. 12). NOTE: One cap screw (25) has a roll pin in the end to restrain the check ball (10). Remove end plate (a), wear washer (171, rotor plate (21) and rotor (22). Remove distributor plate (19) and drive shaft (16). then remove check ball retaining threaded bushing (9) from valve housing and remove check ball (10). Push valve spool assembly from valve housing. Remove axial washer (5), needle (thrust) bearing (6). bearing race (7) and retaining ring (8) from end of spool. Remove cross pin (11) from spool, then slide spool (12) from valve sleeve (15). Remove inner and outer plate springs (13 and 14) from spool. Remove sealing ring (4), "0 ring (3) and oil seal (1) from housing (2).

l 1 1 Paragraph 18 ( Clean and inspect all parts and re- , new any showing excessive wear or 1 other damage. If housing (2). spool (12) I or sleeve (15) are not suitable for further service, renew complete assem- I bly as these parts are not serviced sep- 1 ' arately. All "0 rings and seals are I available in a seal kit. Lubricate all ! internal parts with Hy-Tran Fluid and coat all "0 rings with vaseline. Reas- semble by reversing the disassembly rocedure. Install two outer plate four inner plate s shown in Fig. 13. Use eross- view (Fig. 14) as a guide ssembling. Align the previous- ed match marks and tighten o a torque of 260- steering column and upper shaft assembly. STEERING CYLINDER All Models 18. R&R AND OVERHAUL. To remove the power steering cylinder, disconnect and immediately plug the hydraulic lines. Remove cap screws from cylinder support arms (center steering arm) and separate arms to free cylinder. Remove pin retaining anchor clevis to axle main member and remove cylinder assembly from tractor. With cylinder removed, move piston rod back and forth several times to clear oil from cylinder. Place cylinder in a vise and clamp vise only enough to prevent cylinder from turning. Using a wrench in the flats of piston rod, remove the anchor clevis on one end and w Fig. 13- View showing correct installation of the two outer plate springs (1) and four inner plate springs (2). INTERNATIONAL HARVESTER Fig. 12-Exploded view of steering valve used on Models 484 and 584. 1. Oil seal 2. Housing 3. "0 ring 4. Sealing ring 5. Axial washer 6. Needle bearing 7. Bearing race 8. Retaining rin 9. Threaded bus%ing 10. Check ball 11. Cross pin 12. Spool 13. Outer plate springs (2) 14. Inner plate springs (4) 15. Sleeve 16. Drive shaft 17. Wear washer 18. "0" ring 19. Distributor plate 20. "0 ring 21. Outer ring 22. Inner rotor 23. "0" ring 24. End plate 25. Cap screw w/roll pin 26. Cap screw (6) Fig. 74-Cross-sectional view of Danfoss steering valve used on Models 484 and 584. 1. Plate springs 2 Cross in 3: Valve L y 4. Check ball 5. Spool 6. Sleeve 7. Drive shaft 8. Outer ring 9. Inner rotor the fitting (elbow) on other end. Re- move cylinder head retaining ring (11- Fig. 15) as follows: Lift end of retaining n ring out of slot, then using a pin type , spanner, rotate cylinder head (2) and work retainer ring out of its groove. Cylinder rod and piston assembly (10) can now be removed from tube (1). Re- move remaining cylinder head in the same manner. All seals, "0 rings and back-up washers are now available for inspection and/or renewal. Clean all parts in a suitable solvent and inspect. Check cylinder tube for swring, grooving and out-of-roundness. Light scoring can be polished out by using a fine emery cloth and oil, providing a rotary motion is used during polishing operation. A cylinder tube that is heavily scored or grooved, or is out-of-round, should be renewed. Check piston rod and piston for scoring. grooving and straightness. Polish out very light scoring with fine emery cloth and oil, using rotary motion. Renew rod and piston assembly if heavily scored or Fig. 15-Exploded view of power steering cylinder used on all models. 1. Cylinder tube 7. Back-up washer 2. Cylinder head 8. Piston "0 ring 3. Wiper seal 9. Piston seal ring 4. "0' ring 10. Piston and rod 5. Back-up washer 11. Cylinder head 6. "0 ring retaining ring

International Harvester 766 Tractor Full Service Repair

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