Case 100 International Harvester Service Manual (IH-201)

Out in the field or around the yard, this old Case/International Harvester is usually pulling wagons, running a mower, maybe on a loader, working in dust, mud, and cold starts. This service manual helps you trace problems step by step instead of guessing—how to check systems in order, verify what’s actually failed, then tear down only what you need. Say the tractor won’t pull right under load: you’d follow the clutch and driveline checks in here, isolate whether it’s linkage, clutch, or something deeper, and you won’t just start throwing parts at it.

Applications & Use Cases

• Track down a no-start by following the fuel and ignition tests, so you can isolate whether it’s spark, fuel delivery, or timing.
• Walk through brake diagnostics to check linkage, shoes, and hydraulics before you assume you need a full rebuild.
• Use the step sequence to inspect and adjust the carburetor, then test under load so you don’t chase a simple mixture issue for days.
• Verify clutch problems by checking free play, linkage wear, and engagement before you split the tractor.
• Route and align new belts or linkage exactly how they’re meant to run, then re-check travel and clearances.

FAQ

Q: Is this a scanned manual, and can I search it on my computer?

A: It’s typically a scan of the original book; most versions are searchable, but older scans may have a few pages you’ll scroll through manually.

Q: Can I print pages to take out to the tractor?

A: Yes, and that’s usually what folks do—print the sections you’re working on so you can mark notes and keep the original file clean.

Safety Note

Always block the tractor securely and bleed off any stored pressure before you crawl under or crack open hydraulic lines.

Case 100 International Harvester Index:

BELT PULLEY ………. .
BRAKES ………… . .. .
CARBURETOR (Gas) ….. .. . .
CARBURETOR (LP-Gas) . …. .
CLUTCH, ENGINE . . ……. . 133
COOLING SYSTEM
Radia tor . . . . . . . . . . . . . . . . . 117
Water Pump .. .. .. .. .. .. .. 118
DIESEL FUEL SYSTEM
Injection Pump and Drive .. .
Nozzles … . …. . ……. . .
System Checks ….. .
DIFFERENTIAL . . . 132
DIRECTION REVERSER
ENGINE
Balancer . …….. . .. .. .. .
Cam Followers . . . . . . 52
Camshaft . . . . . . . . . . . . 58
Connecting Rod & Bearings 64
Crankshaft . . . . . . . . . . . 66
Cylinder Head . . . . . . . . 49
Engine Removal . . . . . . . . . . . 48
Flywheel . . . . . . . . . 68
Ignit ion Timing . . . 129
Main Bearings . . . . . . . . . . . . 66
Oil Pump . . . . . . . . . . . . . . . . . 69
Oil Cooler . . . . …… . …. .
Piston & Rings . . . . . . . . . . . . 60
Piston Pins . . . . . . . . . . . . . . . 63
Rear Oil Seal . . . . . 67
Rocker Arms . . . . . . . . . . . . . . 53
Timing Gear Cover . . . . . . . . 56
Timing Gears . . . . . 57
Valves and Seats………. 50
Valve Guides & Springs.. 51
Va lve Timing .. .. .. .. . 55
FINAL DRIVE
BuU Gears . . . . 163
FINAL DRIVE CONT.
Bull Pinions 162
Wheel Axle Shaft… 164
FRONT SYSTEM
Axle Main Member. . . . . . . . . 3
Steering Knuckles . . . . . . . . . 10
Tie Rods and Drag Links. . . 7
Tricycle Type … . . . . . . .. .
GOVERNOR (NON-DIESEL) 116A
HYDRAULIC SYSTEM
Control Valves . . . . 199
Lubrication 184
Pump … , . . . . . . . . . 192
Reg ulator & Safety Valve.. 201
System Adjustments …
Testing . . . . . . . . . . . . . 187
Trouble Shooting . . . . . . . 191
POWER STEERING SYSTEM
Cylinder . . . . . . . . . . . . . . . . . 37
Flow Control & Relief Valve 27
Lubrication and Bleeding 25
Power Unit . . .. .. .. …. .. .
Pump …. . … . …. .. …. .
Rotary Valve . … .
Steering Gear . . . . . . . . . . . . 39
Steering Valves . . . . . . . . . . . 35
Testing .. . ….. . . .
Trouble Shooting ..
Pilot Valve . ……… .. .. .
Hand Pump . . . . .. . .. … . .
POWER TAKE-OFF
Adjustments
(Clutch Type) . . . . 171
(Planeta ry Type) 170
Overhaul
(Clutch Type) . . . 179
(Planetary Type) 174
STEERING, MANUAL . . . . 13
TORQUE AMPLIFIER
Clutch Adjustme nt . . . 141
Clutch Overhaul . . . . . . . . . . . 144
Pla netary Unit . . . . . . . . . . . . 145
TRANSMISSION OVERHAUL .. 151

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