Hyster S30–120E / H60–110E Forklift Service Manual Set 1970–1988 (P/N 899788)

The operating descriptions explain component function and oil flow, while the repair sections provide disassembly, inspection, assembly, and adjustment procedures. Their individual application listings help match the documented system to the truck before tests or replacement parts are selected.

Chapter-specific coverage: The H60–110E powershift material describes operation; the included transmission overhaul section applies to S30–120E and S40–50F. V6/V8 references concern ignition service, not internal engine overhaul.

Cylinder exclusions: The Lift Cylinders publication excludes H7.00–12.50H (H150–275H), H13.50–16.00B (H300–350B), H16.00–30.00C (H360–650C), and H32.00–42.00B (H700–920B). The Tilt Cylinders publication excludes H3.50–5.50XM (H70–120XM).

Text Search, Bookmarks, and Diagram Detail

Search and navigation: Most service chapters support text search and named bookmarks. General Specifications, Vista Mast Repairs, and both powershift PDFs lack useful body-text search; Gauges has text-encoding problems. The schematic files mainly offer searchable headings or captions. Drive Axle, Perkins engine, and Oil Clutch also contain tables or troubleshooting pages without searchable text. Vista Mast Repairs and both powershift files have blank bookmark labels; General Specifications and the five-page schematic file have no bookmarks. Small wiring labels in the sampled diagrams require zooming.

The ZIP contains 35 printable PDFs totaling 592 pages. That total includes the original covers, contents and safety pages, four notes pages, one blank page, and one additional page.

Engine, Powershift, Hydraulic, and Mast Work

This is a selected overview of the included material. Other documented topics include fastener identification and fuel and hydraulic tank repair.

• Engine repair: GM and Perkins internal disassembly, cylinder-head work, timing gears, pistons, crankshafts, bearings, lubrication components, and inspection specifications.

• Fuel systems: Rochester gasoline carburetor repair and IMPCO CA 50/CA 100 LPG vaporizer, fuel-valve, mixture, and governor service.

• Transmission service: Powershift clutch and planetary gear work, differential setup, Monotrol diagnosis, stall testing, hydraulic pressure checks, manual transmission, and oil-clutch repair.

• Hydraulics and chassis: Gear-pump testing, pump chain-drive adjustment, control-valve repair, hydrostatic steering, drive and steering axles, service brakes, and parking brakes.

• Masts and cylinders: Standard and full-free-lift arrangements, Vista mast repair, sideshift carriages, lifting-chain adjustment, sequence valves, and cylinder seal replacement.

• Electrical diagnosis: GM HEI testing, Delco starter repair, alternator checks, gauge diagnosis, wiring diagrams, and symptom-based troubleshooting charts.

This collection is suited to lift truck mechanics equipped for pressure testing, precision measurement, and removal of heavy assemblies.

GM and Perkins Engine Repair

The engine chapters contain step-by-step procedures for cylinder-head disassembly, piston and connecting-rod work, crankshaft inspection, and reassembly. GM coverage distinguishes hydraulic valve lifters, camshaft bearing replacement, cylinder measurements, and rear main seal designs.

Perkins coverage adds cylinder liner replacement, combustion chamber plugs, diesel fuel-system bleeding, injector checks, and injection-pump timing. Later pump and timing-case arrangements use Perkins timing tool 8106 and adapter 8107. Internal injection-pump repairs are assigned to a dealer, and injector repair requires specialized equipment.

Gasoline, LPG, and HEI Service

Rochester procedures address float, choke, accelerator-pump, idle-stop-solenoid, and governor adjustments. LPG documentation follows the filter and shutoff valve through the vaporizer and carburetor, with leak checks and separate component repair procedures. Governor coverage distinguishes earlier pneumatic arrangements from electronic control.

The HEI section covers distributor, ignition-coil, electronic-module, sensing-coil, and high-voltage-wire testing. For the GM 4.3-liter V6 with EPIC LPG or MSTS, timing and idle-speed procedures are referred to separate publications.

Powershift, Manual Transmission, and Differential Work

Powershift material explains forward, reverse, neutral, and inching oil flow. The repair section adds control-valve disassembly, torque-converter inspection, clutch assembly, and the S100–120E accumulator valve. Differential procedures cover bearing preload, gear backlash, and tooth-contact patterns.

The manual-transmission chapter distinguishes the range synchronizer from the direction-selection mechanism. Oil-clutch coverage adds release-mechanism inspection, hydraulic operation, and pedal adjustment.

Hydraulics, Steering, Brakes, and Cooling

Hydraulic procedures include pump-output testing, main and auxiliary relief-valve checks, and pump-drive chain and bearing adjustments. Steering chapters cover column assemblies, control-unit rebuilding, axle mounts, spindle bearings, and steering-cylinder seals.

Brake documentation distinguishes S30–50E/S60ES/S40–50F assemblies from S60–120E brakes. Bleeding, pedal adjustment, and parking-brake adjustment are included.

Frame work covers the counterweight, overhead guard, hood, operator restraints, and engine/transmission removal. Cooling material combines radiator and thermostat checks with ducted-fan repair and installation kit 321006. The fan chapter separates earlier splined drives from later roller-clutch designs and gives different belt adjustments for the S- and H-series installations.

Vista Masts, Carriages, and Cylinder Seals

Vista mast repair lists S30–60ES, S60–120E, H60–110E, H40–60J, H40–60XL, E30–60BC, E30–60BS, E60–120B, and J40–60AS. Procedures address chain wear, roller and strip-bearing clearances, carriage alignment, sequence valves, lift-system leakage, sideshift-cylinder repair, and header-hose roller adjustment. Cylinder chapters distinguish chevron packing and single-lip seals.

The repair cautions identify specific damage risks: excess grease on mast roller tracks can cause rollers to slide and develop flat spots. Removing ducted-fan bearings and roller clutches can damage those parts, affecting replacement requirements during overhaul.

Electrical Fault Charts and System Diagrams

Diagnostic illustrations include Electrical Schematic S30–60ES, Electrical Schematic S60–120E, Hydraulic Schematic – Steering and Powershift, LPG System Schematic, and Hydraulic Diagram – Vista Three-Stage Mast.

Electrical troubleshooting addresses starting failures, battery discharge, charging faults, inoperative gauges, horn faults, and failure of the powershift transmission to engage. The separate gauge reference also covers senders and instrument displays, including electric-truck display systems.

Safety procedures address mast restraint, truck stability during component removal, pressurized fuel and hydraulic systems, and high-voltage ignition handling.

A Preview of Diesel Valve and Powershift Clearance Data

For the Perkins 4.154, the valve-adjustment section specifies cold-engine clearance of 0.012 inch (0.30 mm) for both inlet and exhaust valves.

The S30–120E/S40–50F powershift repair section documents dial-indicator checks for turbine-shaft clearance of 0.001–0.021 inch (0.025–0.53 mm) and stator-support clearance of 0.001–0.005 inch (0.025–0.125 mm).