1954–1964 Massey-Ferguson TO35, TO35D, MF35, MF35D, F40, MH50, MF50, MHF202, MF202, MF204 Tractor Shop Manual

This tractor shop manual covers 1954–1964 Massey-Ferguson TO35, TO35D, MF35, MF35D, F40, MH50, MF50, MHF202, MF202 and MF204 models. It separates Continental Z134 gasoline and LP-Gas engine work from the Standard 23C and Perkins 3A152 diesel sections, with dedicated coverage for the MF204 Revers-O-Matic.

• Engine repair: Engine removal, cylinder-head work, piston and sleeve inspection, crankshaft bearings, oil-pump service and valve-timing checks.

• Fuel systems: Carter and Marvel-Schebler carburetor service, Zenith LP-Gas vaporizer and regulator overhaul, diesel bleeding, C.A.V. pump timing and injector testing.

• Clutches and transmission: Rockford single-clutch and Auburn dual-clutch adjustments, gear-transmission overhaul, planetary units and MF204 Revers-O-Matic clutch service.

• Steering and front axle: Utility, Hi-arch and tricycle front ends; manual steering overhaul, power-steering troubleshooting, bleeding and pressure testing.

• Hydraulic lift and PTO: Early and late pump overhaul, draft- and position-control adjustments, work-cylinder service, and live and ground-speed PTO components.

• Rear axle and brakes: Differential overhaul, bevel-gear replacement, axle-shaft bearing and seal service, brake adjustment and drum-brake repair.

• Cooling and electrical: Water-pump service, ignition timing, generator, regulator and starter test specifications, plus Thermo-Start and glow-plug checks.

This manual is suited to readers already comfortable with tractor splitting, press work and precision measurements.

Engine and Fuel-System Service

The engine sections provide separate inspection limits and assembly data for each engine design. Perkins cylinder-head work includes valve-recession measurement with the Churchill PD 17A depth gauge, while the Standard diesel section addresses its timing chain, tensioner and injection-pump drive.

C.A.V. injection equipment: DPA pump coverage addresses removal, installation and timing. Further internal pump overhaul is assigned to an authorized C.A.V. service station. Pintaux nozzle testing covers opening pressure, leakage and spray patterns, including the auxiliary spray test using adapter ET.846.

MF50 LP-Gas: The Zenith sections describe vaporizer and regulator disassembly, inspection, reassembly and testing. Regulator service references include tool C161-190 and leaf-spring gauge C161-189.

Clutches, Revers-O-Matic and Final Drive

Early and later Auburn dual clutches have separate adjustment and overhaul coverage, supported by dimensioned alignment and release-height tools. These serial-specific distinctions help match the procedure to the installed clutch before disassembly.

MF204 service extends to the Borg-Warner torque converter, control valve, distributor and forward/reverse clutch packs. Performance and oil-pressure checks help distinguish converter faults from clutch or sealing problems.

The Revers-O-Matic splitting notes warn that misalignment can damage the pump drive lugs and oil seal. The later dual-clutch section warns that driving roll pins completely out before cover removal can damage the cover or Belleville spring.

Final-drive instructions distinguish differential-gear backlash adjustment from the fixed, nonadjustable main bevel-gear mesh. Damaged main bevel gears are replaced as a matched ring-and-pinion set.

Hydraulic Lift, Steering and PTO

Lift diagnosis addresses failure to raise or lower, uneven lifting and poor draft control. The hydraulic chapter distinguishes early and late pump construction and explains relief-valve compatibility when fitting a later pump to an older system.

Power-steering service separates the valve and cylinder arrangements, including the MF50 changeover. For MHF202, MF202 and MF204 steering cylinders, the described repair is seal replacement; damaged internal components call for complete-cylinder replacement.

Live PTO drive-shaft procedures are separate from ground-speed gear service. Ground-speed PTO gears are omitted on MHF202, MF202, MF204 and some MH50/MF50 configurations.

Illustrations and Diagnostic References

Illustrations include the TO35/MF35 power-steering cutaway (MF242), LP-Gas system schematic (MF312), dual-clutch transmission section (MF351), Revers-O-Matic clutch exploded view (MF364), and early/late hydraulic pump views (MF391/MF392).

Diesel and power-steering troubleshooting charts accompany component-specific test specifications. Heavy tractor assemblies and pressurized fuel systems require appropriate training, tools and a properly equipped shop.

A Preview of Engine Clearances and Steering-Pump Data

The Continental Z134 crankshaft section specifies 0.002–0.006 inch of end play, controlled by the flanged center main bearing. For the Perkins 3A152, intake and exhaust valve tappet clearances are both 0.010 inch with the engine hot.

The power-steering pump illustration states approximately 4 gallons per minute at 2,000 engine rpm, alongside the system pressure-testing instructions.

Text Search, Bookmarks and PDF Contents

Search and diagram detail: An embedded OCR text layer supports searches across the manual, although recognition errors can affect exact matches. The 23 PDF bookmarks link to the index, service data and major repair sections. Small labels in the LP-Gas schematic are easier to read when enlarged.

Supplied as one printable, English-language 76-page PDF, including the index, condensed service data and model illustrations.