Hyster S30E, S40E, S50E, S60E, S70E, S80E, S100E, S120E, H30H, H40H, H50H, H60H, H40JS, H50JS, H60JS Forklift Service Manual (P/N 899784)

• 33 PDFs totaling 528 pages, combining Hyster S30–50E, S60ES, and S60–120E service information with shared component coverage for H30–60H and H40–60JS trucks.
• Engine repair extends to cylinder heads, valve trains, pistons, crankshafts, timing gears, and oil pumps. Shared engine chapters cover GM 4-153, 4-181, 3.0L, and 6-250, plus Perkins 4.236 and 4.2482 diesels.
• Two-speed manual/oil-clutch and single-speed powershift sections cover transmission disassembly, clutch service, and differential setup. Powershift procedures include control-valve repair, pressure checks, stall testing, and inching adjustment.
• 13 symptom-based diagnostic charts address starting faults, battery drain, charging problems, inoperative gauges and horns, and powershift engagement faults. Separate alternator and starter chapters cover component testing and repair.
• Hydraulic work includes single-stage and tandem gear-pump overhaul, output testing with or without a flow meter, and flow-control and main-control-valve service, including relief-valve checks and adjustment.
• Service-brake coverage includes wheel-cylinder and master-cylinder repair, brake bleeding, and parking-brake adjustment. Steering chapters address axle bearings and linkage, steering-cylinder seals, and hydrostatic steering-control-unit overhaul.
• Conventional and Vista mast repair covers carriage removal, chain inspection, load-roller shimming, and lift adjustments. The sections distinguish standard, full-free-lift, three-stage, and four-stage arrangements from Vista two- and three-stage masts.

Electrical Schematics and Powershift Diagnostics

The electrical material separates Electrical Schematic—Lift Trucks With Oil Clutch from Electrical Schematic—Lift Trucks With Powershift. Model-specific drawings also distinguish gasoline/LPG and diesel H30–60H circuits. Instrument-panel wiring identifies four- and eight-pin connectors.

Alternator coverage addresses Delco, Motorola, and Leece-Neville integral-regulator designs, including Type A and Type B differences in diode arrangements and testing.

The Hydraulic Schematic—Steering and Powershift connects steering supply with transmission operation. The powershift Check Ports for Pressure Tests view identifies the MONOTROL, clutch, torque-converter, and modulation circuits. Separate operating material explains MONOTROL versus direction-lever controls and the S100–120E accumulator valve.

Gasoline, LPG, and Diesel Fuel Systems

Rochester carburetor repair includes float, choke, accelerator-pump, and governor work. The LPG chapter covers IMPCO CA50 and CA100 carburetors, the vacuum-operated fuel lockoff, and vaporizer-regulator service. Its LPG System Schematic supports the leak checks, vacuum tests, and mixture adjustments.

Perkins procedures cover injection-pump removal and installation, injection timing, fuel-system bleeding, and injector testing. Internal injection-pump repair is referred to a dealer, rather than presented as an in-house overhaul procedure. The shared engine chapters serve several Hyster applications; their engine designations must be matched to the truck's installed engine.

Ducted-Fan Variants

A separate 11-page cooling section goes beyond radiator flushing to ducted-fan disassembly, bearing replacement, belt adjustment, and lower-pulley roller-clutch service. For S30–100E trucks, the fan-drive change from splines to a roller-clutch arrangement is identified at D2D–4264X and C4D–2876X, September 1977, and C4T–1523Y, September 1978. The section identifies the roller-bearing and roller-clutch driver kit as P/N 321006.

The fan chapter warns that excessive heating during bearing work can permanently damage the aluminum housing.

Hydraulic Drive, Cylinders, and Masts

Tilt-cylinder coverage identifies the 1980–1981 retainer-seal change and the risk of damaging the relocated O-ring on the cylinder threads. Hydraulic-pump-drive service includes bearing preload and sprocket alignment. Lift-cylinder sections cover seal replacement and leak checks, while the Hydraulic Diagram—Vista Three-Stage Mast distinguishes arrangements with and without a sequence valve. Vista repair coverage also includes the side-shift carriage and cylinder.

Specification and Reference Data

The capacity sheets apply specifically to S60E, S70E, S80E, S100E, and S120E. Reference data includes engine oil-pressure and ignition-timing specifications, transmission test pressures, hydraulic capacities, bearing clearances, wear limits, and component torque tables. Chassis coverage extends to engine/transmission removal, counterweights, drive-axle hubs, and integral fuel and hydraulic tanks.

The set includes Alternator With Regulator (P/N 899784, 20 pages). Cooling System (P/N 897934, 7 pages) adds radiator-cap, thermostat, and water-pump checks. Single-Speed Powershift Transmission—Repairs is P/N 910234 (37 pages); Tilt Cylinders is P/N 910102 (15 pages). Metric and Inch (SAE) Fasteners, P/N 910442 (9 pages), covers metric/SAE fastener grades and identification.

Follow standard shop safety protocols, secure raised mast assemblies as specified, and relieve system pressure before connecting test equipment to hydraulic lines.