Toyota 2H, 12H-T Engine Repair Manual (P/N RM012E, 36044E)

• Two-volume Toyota factory repair set with 1,189 PDF pages: 2H, 12H-T Engine Repair Manual, Pub. No. RM012E — 338 pages, November 1985; Land Cruiser Repair Manual — Chassis & Body, Pub. No. 36044E — 851 pages, August 1980.
• RM012E engine coverage: 2H and 12H-T engines installed in HJ60, HJ61, and HJ75 Heavy-Duty Land Cruisers, with diesel troubleshooting, compression testing, turbocharger service, cylinder-head repair, timing-gear and camshaft work, and cylinder-block overhaul.
• Fuel-system procedures: injection-nozzle testing and overhaul, fuel-feed-pump and automatic-timer repair, plus injection-pump disassembly, reassembly, bench testing, and calibration for 2H manual-transmission, 2H automatic-transmission, and 12H-T boost-compensated configurations.
• 36044E chassis and body coverage: FJ40, FJ43, FJ45, FJ60; BJ40, BJ42, BJ43, BJ45, BJ46, BJ60; and HJ47/HJ60 series, including clutch, H41/H42 and J30 transmissions, transfer cases, driveline, axles, suspension, steering, brakes, front winches, body hardware, and body electrical systems.
• Factory references: symptom charts, diesel electrical circuits, governor diagrams, transmission and axle cutaways, frame-dimension drawings, SST/SSM indexes, and 1981 production-vehicle wiring diagrams, including separate USA/Canada diagrams.
• Important coverage split: RM012E covers HJ60/HJ61/HJ75 engine repair. The 36044E chassis/body volume applies only to its listed FJ, BJ, HJ47, and HJ60 models; it does not provide HJ61 or HJ75 chassis/body procedures.

Engine Systems and Repair Depth

RM012E uses symptom-based charts to diagnose cranking and starting faults, rough idle, sudden stopping, low power, smoke, abnormal noise, and related diesel complaints. Separate electrical charts cover the 2H super-glow and fixed-delay arrangements and the 12H-T intake-heater/timer system. The turbo section adds mechanical checks and indicator- or warning-light fault tracing. Starting and charging coverage includes the starter and relay, EDIC-equipped and non-EDIC 2H systems, the overinjection magnet, alternators with and without IC regulators, 12- and 24-volt charge-light relays, and the HJ60/HJ61 ignition main relay.

Cylinder-head procedures run from removal and disassembly through cleaning, inspection, repair, assembly, and installation. The work includes valves, guides, seats, rocker shafts, pushrods, manifolds, and the different 2H/12H-T layouts. Timing chapters cover the gear train, camshaft, automatic-timer drive, front oil seal, timing marks, and gear-backlash inspection. Cylinder-block repair continues through pistons and rings, connecting rods, crankshaft, main and rod bearings, camshaft bearings, cylinder inspection and boring data, and rear oil-seal service.

The fuel chapter separates 2H and 12H-T nozzle work, then moves into the feed pump, automatic timer, and complete injection pump. It distinguishes the 2H manual-transmission governor, 2H automatic-transmission governor, and 12H-T boost-compensated arrangement. The bench-test material covers injection volume and timing, governor adjustment, high-altitude compensator data, idle-up controls, sealing, and precision-component inspection. Cooling and lubrication sections add water-pump overhaul, thermostat and radiator checks, oil-pressure diagnosis, oil-pump repair, oil-cooler and relief-valve work, and 12H-T piston-cooling oil nozzles and check valves.

Chassis, Body, and Electrical Coverage

The chassis volume follows major drivetrain assemblies through removal, inspection, repair, and reassembly. It covers clutch adjustment and hydraulic bleeding; clutch master and release cylinders; H41/H42 four-speed and J30 three-speed transmission teardown; transfer bearings, gears, seals, clearances, and preload; and standard or double-Cardan propeller shafts. Front-axle chapters address the steering knuckle, axle shaft, differential, free-wheel hub, suspension, shock absorbers, and wheel alignment. Rear-axle material distinguishes semi-floating and full-floating designs and includes conventional and limited-slip differential repair.

Steering coverage includes intermediate shafts, tilt and standard columns, separate steering-gear procedures for 40- and 60-series families, linkage, and power-steering service. Brake chapters cover the hydraulic system, master cylinder, booster, vacuum pump, front drum and disc brakes, rear and parking brakes, the proportioning-and-bypass valve, and the load-sensing proportioning valve. Front-winch repair covers the power takeoff, mechanical and electric winches, winch brakes and gears, plus motor, armature, commutator, brush, thermo-switch, and magnetic-switch inspection.

Body chapters cover 60-series hood, door, lift-gate, swing-out door, instrument-panel, roof, glass, and headliner work, with separate 40-series hood and door procedures. Electrical sections identify connector handling, switch and relay locations, fuse and fusible-link layouts, lighting, turn/hazard circuits, wipers and washers, headlight cleaners, combination-meter and warning systems, rear defogger, and radio. Representative illustrations include the H41/H42 transmission-and-transfer cutaway, front- and rear-axle cutaways, injection-pump governor characteristic diagrams, preheat and charging circuits, and the general-destination plus USA/Canada wiring diagrams for 1981 production vehicles.

Specifications, Special Tools, and Repair Notes

Both manuals consolidate torque tables, inspection limits, clearances, shim selections, bearing-preload and gear-backlash data, alignment specifications, lubricant and capacity information, and electrical test values. Toyota SST references include the 09241-76022 injection-pump stand set, 09992-00023 cylinder-compression check gauge set, 09992-00240 turbocharger pressure gauge, and 09634-60013 steering-knuckle centering gauge.

The publications also flag repair traps tied to precision assemblies. Injection-pump plungers and delivery valves must remain in order and be protected at their sliding surfaces. In the manual-steering chapters, Toyota warns against separating the recirculating-ball nut from the main shaft or running it to the end of the worm; the worm assembly is handled as a matched unit. Major work involves pressurized diesel test equipment, brake hydraulics, heavy drivetrain and winch assemblies, and a securely supported vehicle. Follow the manuals' isolation, cleanliness, pressure-control, and support precautions before teardown.