International Harvester IH Farmall Cub & Cub Lo-Boy Tractor Workshop Service & Repair Manual

Due to a contin u ous program of research and development, some procedures , specifications and parts may be altered in a constant effort to improve our products. When changes and improvements are made in our products, periodic revisions may be made to this manual to keep it up-to-date. It is suggested that customers contact their dealer for information on the latest revision. CUB® AND CUB LO-BOY® TRACTORS GSS-1411 W/Revision 1 February, 1976 NOTE : Refer to GSS·I052, Testing and Servicing Electrical Systems, for service information not contained in this manual. I

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General Contents Page Safe Work Rules ........................................... . ................... IV & V Standard Torque Data for Nuts and Bolts ................................................. VI Special Service Tools Required ........................................................ VII Section [!] ENGINE [!J FUEL SYSTEM [!] STEERING, FRONT WHEELS AND FRONT AXLE ~ SPLlnlNG AND RECOUPLING THE TRACTOR [!] ENGINE CLUTCH []] TRANSMISSION AND DIFFERENTIAL 16AI POWER TAKE-OFF AND BELT PULLEY [!J FINAL DRIVE AND BRAKES ijJ HYDRAULIC SYSTEM [!] ELECTRICAL ill

WORK SAFELY - FOLLOW THESE RULES A This symbol is used to call your attention to instructions concerning your personal safety. Be Sure to observe and follow these instructions. 1. Always use safety stands in conj unction with hydraulic jacks or hoists. Do not rely on t he jack or hoist to carry the load, they could fail. L 2. Always wear safety glasses when using a hammer, chisel or other tools that may cause chips to fly . 3. Keep work area organized and clean. Wipe up oil or spills of any kind. Keep tools and parts off of the floor. Eliminate the poss ibi lity of a fall which cou ld resu lt in a serious injury . GSS-1411 (Rev. No. 1) TV 4 . When splitting tractors, or disassembling machines, be sure to use safety stands and adequate supports to prevent tipping or roll · over. FESM-971 5. Use a safety catch on all hoist hooks. Do not take a chance, the load could slip ott of the hook. 6. When using eln acetylene torch always wear welding goggles and gloves. Keep a "charged" fire extinguisher within reach . Be sure the acetylene and oxygen tanks are separated by a metal shield and are chained to the cart. Do not weld or heat areas near fuel tanks or fuel lines and utilize proper shielding around hyd· raulic tanks or hydraulic lines. Pronted In United States 01 Am ,.cn

7. Always use a safety bar to block hydraulic cylinders. Never rely on the machine hydraulic system to hold when working on loaders etc. A hydraulic line or cylinder could fail or some - one cou ld accidently strike the control levers causing the loader to fall. 8. When reassembling subassemblies, parts, hoses, hydraulic lines, fuel lines, wiring etc., be sure they are positioned properly for align - ment and clearance with related parts to their origina I setting and/or position. 9. Electrical storage batteries give off highly inflammable hydrogen gas when charging and and continue to do so for some time after rec- eiving a steady charge. Do not under any cir- cumstances allow an electric spark or an open flame near the battery. Do not lay tools across battery terminals as this may result in a spark or short circuit which may cause an explosion. Be careful to avoid spilling any electrolyte on hands or clothing . 10. Hydraulic fluid escaping under pressure can have enough force to penetrate the skin. Hydraulic fluid may also infect a minor cut or opening in the skin. If injured by escaping fluid, see a doctor at once. Serious in- fection or reaction can result if medical treatment is not given immediately. Do not attempt to repair or tighten hoses that are under pressure, when the boom is raised, or with the tractor engine running. Cycle all hyd - raulic control valves to relieve all pressure before v disconnecting the lines or performing other work on the hydraulic system. Make sure all connections are tight and hoses and lines are in good condition before applying pressure to the system. To locate a leak under pressure, use a small piece of cardboard or wood. Never use hands. 11. When refueling, keep the hose and nozzle or the funnel and container in contact with the metal of the fuel tank to avoid the possibility of an electric spark igniting the fuel. Do not over- fill the fuel tank - overflow creates fire hazard . Do not smoke when refue.Hng. Never refuel when engine is hot or running . 12. Always use a protective fixture when in- flating tubeless tires that have been repaired or are loose on the rim. Do not inflate over 30 psi to seat the tire bead. 13. Use pullers to remove bearings, bushings, gears, cylinder sleeves etc. when applicable. Use hammers, punches and chisels only when absol utely necessary. Then, be sure to wear safety glasses. 14 . Never use trouble lights or electric powered tools that have cut and/or damaged cords or plugs. Be sure all electric tools are properly grounded . 15 . Be careful when using compressed air to dry parts. Use approved air blow guns, do not exceed 30 psi, wear safety glasses or goggles and use proper shielding to protect everyone in the work area. 16 . Do not wear rings, wrist watches or loose fitting clothing when working on machinery, they could catch on moving parts causing serious injury. 17. Excessive or repeated skin contact with sealants or solvents may cause skin irritation. In case of skin contact , remove sealant or sol - vent promptly by washing with soap and water . IMPORTANT: The above is only a partial list of safe work rules. In addition, always refer to the Operator's Manual for the specific machine for additional safe work rules regarding the machine operation.

STANDARD TORQUE DATA FOR NUTS AND BOLTS· FOOT POUNDS Recommended tor~. for 1111 Standlrd Application Nuts and Botts, provided: A. All thread .. rfaces I re ellan Ind lubricated with SAE·30 engine oil. (See NOTE.) B. Joints Ire rigid, that ii, no gaskets or eompreuible mlter ials are used. C. When reusing nuts or bolts use minimum tor~e values. NOTE: Mul ti ply the standard torque by: .65 when finished jam nuttare used . . 70 when Molykote, white lad or l imilar mi xG.ll'Cs ara uled as lubr ic ants . . 75 when parkerized bolts or nuts .re used. . 85 when cadmium plated bolts or nuts and zinc bolts w/waxed zinc nuts are used . . 90 when hardened .. rflC8$ are used under the nut or bolt head. 1 FOOT POUND = 1.355 NEWTON METERS Bolt or Stud Type 1 Type 1 Bolts Type 1 Bolts Type 5 Type 8 (all lengths I Diameter Studs Only S" length longer than 6" (all lengths) On ly when used1 or Itss in cast (gray) iron Inc;hel MM Min. Max. Min. Max . Min Max. Min. M .. x. Min . Ma x. 1/4 6.4 5 6 5 6 3 3 9 10 11 13 5116 8.0 12 13 12 13 6 7 19 21 24 27 3/8 9.5 21 24 21 24 11 13 33 37 43 47 7/16 11.1 3S 38 35 38 19 21 53 60 69 76 1/2 12.7 52 58 52 58 29 32 80 90 104 117 9/16 14.3 70 80 70 80 41 46 115 130 150 170 5/8 15.9 98 110 98 110 57 63 160 180 210 230 3/4 19.0 174 195 174 195 100 112 290 320 350 390 7/8 22.2 300 330 162 181 162 181 420 470 570 630 1 26.4 420 470 2SO 270 250 210 630 710 850 950 1·1/8 28.6 600 660 350 380 350 380 850 950 1200 1350 1·1/4 31.8 840 940 490 640 490 540 1200 1350 1700 1900 1·3/8 34.9 1100 1230 640 710 640 710 1570 1760 2300 2500 1·1/2 38.1 1470 1640 850 940 850 940 2000 2300 3000 3300 1·3/4 44 .5 2350 2450 1330 1490 1330 1490 3300 3700 4700 5200 2 SO.8 3500 3900 2000 2200 2000 2200 5000 5500 7000 7800 tWhe n boll pene tra tIon il 1·1/2 limes th e diamete r o f the boll. IH TYPE 1 5 8 BOLT TYPE IDENTIFICATION CHART SA £ DESCRIPTION GRADE E 1 Will HAVE A !!!! STANDARD MONOGRAM IN THE CENTER OF THE HEAD -; or .! 2 Low or Medium Carbon Steel Not Heat Treated 5 WILL HAVE A ~ AND 3 RADIAL LINES Quenched and Tempered Med ium Carbon Steel 8 Will HAVE A ~' AND 6 RADIAL LINES Quenched and Tempered SpeCial Carbon or Alloy Steel • The center marking identifies the bolt manufacturer. The !:!e monogram IS currently used. Some bolts may still have an IH or a raised dot which previously Identified IH bolls. VI All other appl i cat ions Min. Max 12 14 ZT 30 45 50 75 86 115 130 165 185 220 250 400 450 650 730 970 1090 1380 1550 1940 2180 2600 2800 3300 3700 5300 6000 8000 9000 80LT HEAD MARKING- @ < }U) ® ye-

SPECIAL SERVICE TOOLS REQUIRED SECTION 1 FES 33-1 FES 33-4 FES 100 FES 108 FES 138 FES 142-1 SECTION 2 FES 36-3 FES 36-4 SECTION 5 FES 50 SECTION 8 YES 1-2 PES 94-6 Fan drive pulley remover Fan drive pulley wear sleeve installer Engine lifting cbain assembly Piston fitting set Lifting sling Engine stands Special plier Clutch service tool Hydraulic pressure gauge Pressure snubber Order from: Service Tools P. O. Box 314 Owatonna, MN 55060 VD

Section 1 ENGINE CONTENTS SPECIFICATIONS ...... , It •••••• •••••••••••••••• ••••••••••••••• ENGINE REMOVAL ............................................ . ENGINE INSTALLATION . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . CYLINDER HEAD .... • ..... ••••••••••.••••..•••.•.••.•••.•.••. VALVES Valve Lash Adjusting Procedure Removing Valves Inspection. . General Valves. Valve Seat Retainer Keys Valve Guides Valve Seats Rotocap Testing Rotators Reconditioning . Valve Guides Valves ... Valve Seats •. Refacing Seats Reassembl y CONNECTING RODS, PISTONS AND PISTON RINGS General .•• ..... Connecting Rods Pistons Piston Rings Piston Pins •. 1- 1 . . . . . Page 1-4 1-10 1-12 1-13 1-15 1-16 1-17 1-17 1-18 1-19 1-20 1-20 1-20 1-20 1-21 1-21 1-21 1-23 1-23 1-25 1-25 1-25 1-26 1-26 1-26

Page Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1- 26 Disassembly . . . . . . . . . . . . . . .. ....... ....................... 1-27 Inspection and Repair. . . . • . . . . . . . . . . . . . . . . . . • . . . . . • . . . . . . . .. 1-28 R, eassembly •..••.•• . . . . . . . I • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• 1-30 Piston Fit in Bore . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . .. 1-31 Bearing Fitting Procedure. . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . .. 1-32 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . • . • • • . . . .. 1-35 CRANKCASE CYLINDER RE·BORING PROCEDURE When to Re- Bore . . . . . . . . . . . . . . . . • . . . . . . . •. . . . . . . . . . . . . . . . . . . . 1-36 Preparing the Block . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . • . . . . • . . . . .. 1-36 Re-Boring ...................... •• ....... •.•..•• ..... •.•••• 1-37 HOning . . . . . . . . . . . . • . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . • . . . . . . .. 1-37 Cleani.ng ..... t • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •• 1-38 Checking Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-38 TIMING GEAR TRAIN AND FRONT COVER General ....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38 CAMSHAFT General .• ...... 1-43 CRANKSHAFT AND MAIN BEARINGS General .......... . 1-47 LUBRICATING OIL PUMP 1-53 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-54 0i"1 P1J.mp . • • • . . . . . . • • • • • • • . . • • • . • • • • . • • • . • . . • • . • • • • . • • . • . •• 1-54 Pressure Regulator Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . .. 1-55 Removal and Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-55 Inspection and Servicing . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . • . . . . . .. 1-56 Reassembly ............................................... • 1-57 COOLING SYSTEM General Description and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-58 Removal of Radiator Assembly. . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . .. 1-59 Inspection and Repair. . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-59 Installation of Radiator Assembly . . . . . . • . . . . . . . . . . . . . . . . . . . . . . 1-60 Cooling Fan Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . .. 1-60 TROUBLE SHOOTING . .. . . . ,. . . . .. . . . . . . . . ,. . . . . . . . . . . . . . . . . . . . . . . . 1-63 TUNE·UP ••...• 1-74 GSS-1411 (Rev. No. 11 Printed in Unit.ed States of AmeriCli 1- 2

International Harvester IH Farmall Cub & Cub Lo-Boy Tractor Workshop Service & Repair Manual

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