Case/International 235, 235H, 245, 255, 265 & 275 Tractor Shop Manual

This shop manual covers 1980s-era Case/International 235, 235H, 245, 255, 265, and 275 tractors, with model-specific repair procedures for the engine, driveline, steering, hydraulics, and electrical system.

• Engine repair: Engine removal and installation, cylinder-head service, piston and connecting-rod inspection, crankshaft bearings, timing gears, and lubrication-system repair.

• Fuel and cooling systems: Injection timing, fuel-system bleeding, injector testing, governor service, radiator removal, thermostat checks, and water-pump replacement.

• Transmission and clutch: Tractor splitting, gearbox overhaul, live-PTO hydraulic clutch service, and hydrostatic troubleshooting for the 235H.

• Axles, steering, and brakes: Front-drive axle repair, differential and final-drive overhaul, steering-gear service, and shoe- and disc-brake repair.

• Hydraulic lift: Troubleshooting, pressure and flow tests, pump overhaul, lift-cylinder service, and control-linkage adjustments.

• Electrical diagnosis: Alternator and regulator tests, starting-motor service, safety-switch checks, wiring diagrams, and the control-timer schematic.

Suited to mechanics experienced in tractor disassembly and precision measurement, with lifting equipment and hydraulic test instruments available.

Engine Repair and Cooling

Cylinder-head, piston, connecting-rod, and bearing sections provide inspection limits and assembly specifications. Press-fit piston pins on the 235, 235H, and 245 are distinguished from floating pins on the 255, 265, and 275; Case support tool ST332301 is specified for press-fit work.

An engine lubrication flow diagram accompanies the gerotor oil-pump inspection data. Cooling coverage includes thermostat testing and belt adjustment; water-pump service is by complete assembly replacement.

Fuel Injection and Governor Service

Injection-pump timing and governor adjustment are supported by timing-gear illustrations and a governor cross section. The ND-DN4SD24 nozzle section covers opening pressure, leakage, spray-pattern testing, and cleaning.

Internal injection-pump work and injector calibration require specialist training and test equipment. The pump procedures concentrate on timing, removal, and installation.

Transmission, Clutch, and PTO

Separate sections distinguish sliding-gear, constant-mesh, synchromesh, and hydrostatic transmissions. Cross-sectional views explain how the hydraulic clutch interrupts wheel drive while the live PTO continues operating.

The 235H troubleshooting chart links no-drive, one-direction-only, neutral-creep, and overheating symptoms with possible causes. Drive- and charge-pressure tests help narrow the fault before removing the hydrostatic unit.

Live-PTO clutch overhaul references the CAS-1977 pressure fixture and CAS-1976 alignment tool. The clutch-split precautions address the risk of damaging the assemblies by pulling the engine and clutch housing together with mounting screws.

Axles, Steering, and Brakes

Bevel-gear tooth-contact illustrations support pinion-depth and backlash adjustment. Brake coverage distinguishes expanding-shoe units on the 235, 235H, 245, and 255 from ball-and-ramp disc brakes on the 265 and 275.

Power-steering overhaul includes dimensions for a fabricated assembly plate. The front-drive spindle sections warn that unsuitable installation tools can distort the thin kingpin seals.

Hydraulic Lift Diagnosis

Hydraulic line-routing drawings distinguish main and auxiliary pump arrangements. Troubleshooting covers lift failure, slow operation, neutral-position lowering, and overheating, with control-valve, drop-rate, and linkage adjustments.

Remote auxiliary-valve service is by complete assembly replacement. Secure the tractor and relieve hydraulic pressure before diagnostic or repair work on these systems.

Electrical Circuits and Component Tests

The circuit section applies the 235/235H wiring diagram to the 245 and 255 and identifies the 265's fusible-link difference. A separate 275 diagram and component-location drawings support circuit tracing.

Alternator and regulator tests accompany starter and safety-switch checks. The control-timer schematic is included, but the timer is serviced as a complete unit.

Selected Engine and Steering Specifications

All covered engines specify cold intake and exhaust valve clearance of 0.25 mm (0.010 in.). Maximum main-bearing diametral clearance is 0.1 mm (0.004 in.).

Crankcase capacity, including the filter, is 3.5 L for the 235/235H, 4.5 L for the 245/255, and 4.7 L for the 265/275.

For 245/255 power steering, the relief-valve setting is 10,294 kPa (1493 psi). Tie-rod end nuts attaching to the steering arms on two-wheel-drive 235, 235H, 245, and 255 models are specified at 59–88 N·m.

PDF Search, Diagrams, and Page Count

Text search and diagram detail: Embedded OCR supports searches through the main text, but wiring labels are not reliably searchable. Small labels require zooming, and the control-timer schematic is faint. Page-range bookmarks are present, but several links do not work.

Supplied as one printable English PDF with 128 pages, including the title/index and condensed service-data sections.