1990–1999 Hyster G005 H3.50XL H4.00XL-5 H4.00XL-6 H4.50XL H5.00XL Lift Truck Service Repair Manual (P/N 910102)

This 34-file, 790-page PDF factory section set provides truck-specific service data for the Hyster H3.50XL (H70XL), H4.00XL-5 (H80XL), H4.00XL-6 (H90XL), H4.50XL (H100XL), and H5.00XL (H110XL). Several component SRMs also cover related Hyster trucks; not every page is exclusive to these five models. Because the procedures assume authorized, trained personnel and require lifting, pressure-testing, electrical, scan, and internal-engine equipment, this set is best suited to professional lift-truck technicians and equipped repair shops.

• Engines, fuel, and cooling: Covers internal repair of the GM gasoline engine, GM electronic engine control and throttle-body injection, the LPG filter, vaporizer, carburetor and governor, Perkins engine work, and radiator, thermostat, water-pump, and fan/shroud service.
• Transmission and drive systems: Provides removal, disassembly, inspection, assembly, linkage adjustment, stall testing, and pressure testing for the powershift transmission, torque converter, clutch packs, manual transmission, oil clutch, drive axle, speed reducer, and differential.
• Hydraulics, brakes, and steering: Details the chain-driven pump assembly, gear-pump repair and output testing, flow-divider adjustment, main control valve checks, brake booster and drum-brake service, steering axle and control-unit overhaul, and system bleeding.
• Mast and load-handling equipment: Covers Vista limited- and full-free-lift mast configurations, plus carriages, side-shift assemblies, lift and tilt cylinders, lift-chain inspection and adjustment, load rollers, strip bearings, and mast shimming.
• Electrical diagnosis and repair: Includes instrument-panel meters and senders, warning devices, alternator and starter testing, ECM fault-code charts, ALDL diagnosis, connector and harness repair, and early- and later-production wiring schematics.
• Specifications and workshop data: Supplies component torque specifications, hydraulic and transmission pressure-test data, fluid capacities, wear and inspection limits, electrical test values, mast and linkage adjustments, maintenance schedules, and troubleshooting tables.

Production Changes and Configuration Details

The powershift material separates early and later transmission arrangements. It identifies later H3.50-5.00XL throttle-linkage configurations beginning at serials F5D-1501 and F5A-7172, and notes that the cold-oil relief components were deleted after transmission serial T46M6999. The Vista mast chapter also distinguishes the earlier side-shift carriage from the design introduced during the second half of 1993.

The GM 4.3-liter V-6 chapter spans multiple builds and provides different procedures where designs changed, including 1995-and-earlier versus 1996-and-later cylinder-head and oil-sump work. It explicitly warns that components from one model year are not automatically interchangeable with another.

Engine and Diagnostic Scope

Truck-level capacity and maintenance pages identify GM V-6, Perkins 4.2482, and Perkins 1004-4 installations. The internal Perkins repair material supplied with the set covers the Series 1000 1004-4, 1004-4T, 1006-6, 1006-6T, 1004-42, 1006-60, and 1006-60T families. The 4.2482 has specifications and maintenance data, but there is no separate 4.2482 internal-overhaul chapter in this file set.

For GM gasoline diagnosis, the ECM section provides System Check routines, code charts for CTS, TPS, governor, MAP, electronic spark timing, fuel-pump, PROM, CalPak, and ECM faults, plus symptom-based troubleshooting. Named equipment includes the HYS1005 scan tool, HYS1003 fuel-pressure gauge, HYS1004 terminal-repair kit, and ALDL key P/N 1338734. The Perkins chapters add illustrated PD- and MS-series tool sheets for valve, liner, seal, crankshaft, and timing work.

Schematics, Section Identity, and Page Breakdown

The two dedicated 14-page diagram sections include Perkins 1004-4 early/late electrical schematics, GM V-6 gasoline and LPG wiring schematics, the powershift transmission schematic, oil-clutch schematic, hydraulic-system schematic, and U.S./EEC lighting-option diagrams.

Factory cross-references identify the powershift pair as 1300 SRM 336/337, the manual transmission as 1300 SRM 335, the oil-clutch system as 1200 SRM 334, electronic engine control as 2200 SRM 473/468, and the diagram sections as 8000 SRM 494/519. The separate Tilt Cylinders file is marked P/N 910102 / 2100 SRM 103.

Page allocation is: general specifications and instruments, 33; electrical, starting, and engine control, 179; engine, fuel, and cooling, 268; drivetrain, 103; hydraulics, brakes, and steering, 80; mast and lift/tilt cylinders, 70; frame and periodic maintenance, 57.

The brake chapter flags a critical repair mix-up: installing the left- and right-hand adjuster assemblies on the wrong sides makes shoe clearance increase each time the brakes are applied. The gear-pump chapter likewise requires housing and seal orientation to be tracked during teardown because incorrect assembly can alter oil-passage alignment and cause rapid wear or pump failure.

Heavy machinery maintenance carries inherent risks. Always secure the lift truck with properly rated blocking and depressurize hydraulic lines before beginning any major component teardown.