Ford TW-5 / TW-15 / TW-25 / TW-35 Tractor Shop Manual (1983–1989)

This shop manual covers Ford TW-5, TW-15, TW-25, and TW-35 tractors, with separate service information for two-wheel-drive and front-wheel-drive configurations. Its paragraph-based procedures extend from component inspection and adjustment to tractor splitting, major overhaul, hydraulic testing, and electronic instrument diagnosis.

PDF Search, Navigation, and Diagram Detail

Text search and illustrations: An OCR text layer supports searches through much of the manual, but recognition errors and poorly indexed diagram labels limit search reliability. There are no embedded PDF bookmarks. Small connector labels and hydraulic schematic legends are best read with zoom.

The download contains one printable English-language PDF with 160 pages total: 159 manual pages and one additional front page, already included in that total.

Engine, Drivetrain, and Hydraulic Repair Coverage

These coverage highlights are a selection from the manual, rather than a complete contents list. Other topics include radiator removal and fan-drive service.

• Front axle and FWD: Adjustable front axle service, steering-knuckle repair, planetary-hub overhaul, differential adjustment, bevel-gear setup, and transfer-case overhaul.

• Engine overhaul: Engine removal, cylinder-head and valve service, timing gears, pistons and rings, crankshaft bearings, oil seals, and lubrication-system repair.

• Fuel, air, and cooling: Injection-pump timing, fuel lift-pump repair, nozzle testing and overhaul, AiResearch turbocharger overhaul, TW-35 intercooler service, and water-pump overhaul.

• Clutch, transmission, and Dual Power: Step-by-step procedures for tractor splitting, clutch overhaul, transmission disassembly, shift-linkage adjustment, pressure testing, and planetary end-play adjustment.

• Rear drivetrain, brakes, and PTO: Differential and bevel-pinion setup, rear axle and planetary final-drive overhaul, wet-disc brakes, brake bleeding, and PTO clutch/control-valve repair.

• Hydraulics and steering: Lift troubleshooting, pressure and pump-flow tests, main and auxiliary pump repair, lift-cylinder overhaul, draft/position-control adjustment, and hydrostatic steering diagnosis.

• Electrical and instruments: Alternator, regulator, starter, and safety-start switch tests; instrument fault messages, connector-pin checks, sender tests, program-switch setup, and ground-speed calibration.

Because the work assumes pressure gauges, dial indicators, presses, splitting stands, lifting equipment, and model-specific service tools, this shop manual is suited to experienced tractor mechanics and well-equipped owners already familiar with major mechanical repair.

FWD Axles and Dual Power Diagnosis

Front-wheel-drive coverage distinguishes the APL-345, APL-3054, APL-355, and APL-365 axle builds. Early TW-5, TW-15, and TW-25 tractors use the APL-345; early TW-35 tractors use the APL-3054. Later production changes to the APL-355 on TW-5/TW-15 and the APL-365 on TW-25/TW-35.

The early TW-35 transfer case receives separate removal, sectional, and overhaul information. Steering coverage also distinguishes external and integral cylinders, including the later two-wheel-drive cylinder introduced for 1987-and-after production.

Dual Power coverage includes the planetary assembly, hydraulic supply, control valve, and direct-drive and underdrive clutch packs. Its diagnostic guidance explains why normal pressure at the PTO test port does not rule out restricted clutch flow: a plugged control-valve screen can still cause harsh shifting or clutch slip.

Hydraulic Production Changes

Separate sections cover tractors built before April 1985 and those built April 1985 and later. The later arrangement adds an engine-driven auxiliary pump and priority-valve pack. Auxiliary pump flow supplements the remote-valve circuit, rather than the hydraulic lift circuit.

The manual also distinguishes the TW-35 main pump used before March 1984, revised low-pressure regulating valves identified by transmission date codes, and later De-luxe remote valves and couplers. Paired hydraulic schematics show how the earlier and later circuits differ.

Brake, Instrument, and Cab Variants

Brake procedures distinguish the TW-35 power-brake valve from the master-cylinder arrangement on the other models. PTO coverage includes troubleshooting, pressure tests, reduction gears, output shafts, and clutch/brake components.

Electrical coverage includes component test circuits, connector views, and sender-location drawings, but not a complete tractor wiring-diagram set. Cab sections distinguish builds before November 1985 from November 1985 onward; early-cab wiring instructions also identify washer-pump wiring differences between A/B- and C-prefixed serial numbers.

Workshop References and Assembly Precautions

Condensed service data and component sections provide torque specifications, fluid capacities, pressure-test data, electrical values, wear limits, clearances, shim selection, and adjustment specifications in U.S. customary and metric units.

Named tooling includes the No. 201387 splitting kit, No. 2142 clutch fixture, No. 7446 brake-adjusting tool, No. 1302 lift-cover fixture, and axle-specific pinion and bearing-adjustment tools. Illustrations run through Fig. 357 and include axle and Dual Power exploded views, transfer-case sections, and a valve-clearance sequence chart.

Axle instructions address matched bevel-gear sets and replacement pinion-preload spacers; incorrect pairing or spacer reuse can disturb gear contact or preload and damage bearings or gear teeth. Dual Power cover orientation determines lubrication-passage alignment, and a cover that will not seat freely indicates incorrect assembly.

Tractor splitting, axle and cab removal, compressed clutch springs, high-pressure injector testing, and hydraulic pressure checks require proper stands, lifting fixtures, guarding, and protective equipment. Follow the manual’s assembly-specific cautions before beginning repair work.

Oil and Fuel Pressure Specifications — Selected Examples

The engine-lubrication section lists normal oil-pump pressure as 40–65 psi at 2,200 engine rpm, with relief-valve opening pressure of 60–80 psi.

For fuel-supply testing, the lift-pump specification is 2–5 psi. The test also checks whether pressure remains steady for at least five minutes without further operation of the priming lever.