1964–1978 Massey Ferguson MF 135 & MF 148 Tractor Workshop Manual Collection (P/N 1856 027 M1 / 1856 002 M1)

The tractor sections cover chassis systems and service work; the appended engine excerpt provides separate 3A-152 overhaul information.

Engine coverage: The tractor sections identify the Perkins AD3.152 and refer to its separate workshop manual for detailed engine and fuel-injection servicing. The appended 3A-152 material does not replace that AD3.152 manual.

Drivetrain, Hydraulic and Electrical Service Coverage

• Engine and cooling: Tractor splitting, engine removal and refitting, radiator service and cooling-system fault diagnosis, plus a separate 3A-152 engine repair excerpt.

• Clutch and transmissions: Auburn dual-clutch servicing and adjustment, with separate overhaul procedures for 6-speed, 8-speed and Multi-Power transmissions.

• Rear axle and PTO: Differential and pinion servicing, Girling drum-brake adjustment, live PTO repairs and independent PTO clutch servicing and hydraulic testing.

• Hydraulics and linkage: Lift-cover and pump overhaul, draft and position control adjustments, Mark III pump coverage, auxiliary hydraulic tests and drawbar settings.

• Steering and front axle: Recirculating-ball steering-box overhaul, power-steering pump and control-valve service, steering-ram repairs and front-axle bearing and shim work.

• Fuel and electrical systems: Fuel-filter replacement, system de-aeration and throttle-linkage adjustment, alongside wiring diagrams, charging-circuit checks and instrument service.

The workshop introduction identifies Massey Ferguson distributor and dealer personnel as its intended users; major repairs require the specified service tools and workshop equipment.

Transmission Overhaul and Assembly Checks

Separate transmission sections document shifter rails, input shafts, layshafts, planetary reduction units and complete gearbox overhaul. Gear-tooth counts and reduction-ratio tables distinguish the configurations, while the Multi-Power section explains the hydraulic clutch and freewheel operation.

The Auburn clutch material includes component section views, inspection criteria and adjustments using the MF 215 PTO clutch gauge and MF 314 lever-height gauge. Its warning against machining the false flywheel or pressure plates explains the resulting loss of heat-dissipation capacity.

The 8-speed section also warns against pressing the mainshaft bearing off toward the rear, where the larger gear teeth obstruct removal and risk component damage.

Hydraulic Diagnosis and Model Differences

Hydraulic coverage extends to the response-control dashpot, pressure-control valve, ram cylinder and internal linkage. The MF 148 Mark III pump section provides its own component servicing and adjustment procedures.

Auxiliary sections distinguish low-capacity Multi-Power and high-capacity pump arrangements. Wooster and Kontak spool valves, combining valves and selector valves receive separate treatment, with pressure, flow, bypass and kick-out tests.

Illustrations include “Draft Control — Implement Lowering,” position-control operating views and Wooster single- and double-acting circuit flows. These connect valve positions with oil routing, helping a technician interpret hydraulic behavior before selecting a test.

Serial-specific amendments distinguish regulator-valve servicing, relief-valve specifications and front-axle shim arrangements. They help match the procedure to the tractor’s configuration instead of applying one specification across every version.

Engine, Fuel and Electrical Scope

The 3A-152 excerpt covers cylinder-head and valve work, pistons, connecting rods, liners, crankshaft bearings and lubrication-system repairs. “Timing Gear and Marking” and oil-pump clearance illustrations accompany its dimensional and inspection data.

The tractor fuel section describes the C.A.V. D.P.A. injection system, filter servicing and de-aeration. Detailed injection-pump and injector servicing is referred to the separate Perkins manual.

Electrical coverage includes an MF 148 wiring diagram with component and wire-color keys, charging-circuit checks, voltage-regulator and cut-out relay adjustments, and neutral safety-switch service. Starter and dynamo internal servicing is also referred to the Perkins manual.

Chassis Service and Workshop References

Rear-axle instructions include differential preload checks and pinion servicing; the brake section covers shoe work, adjustment and balancing. Linkage sections distinguish stabilizers, swinging drawbars, Auto-Hitch arrangements and pressure-control couplers.

Regular maintenance, tractor storage, pre-delivery checks and safety-frame or cladding-kit installation are included. Reference material covers tractor weights, tire pressures, fluid capacities, conversion tables and standard fastener torques.

Working on heavy machinery inherently involves risk, so always verify equipment stability, safely relieve residual hydraulic pressure, and review relevant load-bearing capacities before beginning heavy teardowns.

A Preview of Pump-Capacity Specifications

For the MF 148, the high-capacity auxiliary pump is specified at 31.8 liters/min at 2,250 engine rpm.

The low-capacity Multi-Power pump is listed separately at 17.5 liters/min at the same engine speed. These entries distinguish pump configurations; the auxiliary hydraulic section provides the associated testing procedures.

Searchable Text, Bookmarks and PDF Contents

Search and diagram detail: An OCR text layer supports searches across the main text, although recognition errors occur and four hydraulic illustration pages have no text layer. Embedded bookmarks navigate the main sections; the engine bookmark opens the repair chapter after its preceding specification tables. Small wiring codes and terminal labels are readable when enlarged.

Supplied as one printable PDF with 421 pages total. This includes the workshop and engine material listed above, two added cover/index pages, and four amendment/addendum pages already included within the workshop material.