Toyota 8FBCU20/25/28/30/32 & 8FBCHU25 Forklift Repair Manual Set 2010–2015 (P/N CU346)

Use Volume 1 for chassis, body, and load-handling repairs and Volume 2 for electrical control tests, multi-function display functions, and fault diagnosis.

Coverage limits: Later production changes may differ from Volume 2. Controller work covers diagnosis and assembly replacement; Toyota prohibits internal disassembly of the main and traveling/load-handling controllers.

For full SAS function and operation explanations and battery recommendations, Toyota refers to the separate New Model Feature 8FBCU20 to 32 publication, P/N PU319, which is not included.

PDF Search, Bookmarks, and Diagram Detail

Text search and drawings: Both volumes have searchable text and chapter/subsection bookmarks, although a few Volume 1 bookmark entries open the cover. Some Volume 2 Connecting Diagram labels are not searchable. Small wiring and connector labels are readable when enlarged.

The ZIP download contains a 654-page set of two printable English PDFs, including the covers, printing-information pages, and 14 blank pages.

Drivetrain, Mast, and Electrical Service Coverage

These highlights are selected coverage from the publications. Further topics include periodic maintenance schedules and return/suction filter replacement.

• Motors and drivetrain: Step-by-step drive and pump motor removal, disassembly, inspection, and reassembly, plus drive unit and differential repair.

• Axles, steering, and brakes: Front and rear axle service, hydrostatic steering valve overhaul, brake bleeding, braking-force checks, and parking-brake adjustment.

• Battery and body: Compartment requirements, charge display, troubleshooting, battery handling, insulation checks, stopper adjustment, and battery hood, counterweight, seat, and fuse-location work.

• Masts and hydraulics: V/FV/FSV/QFV mast service, lift and tilt cylinder repair, oil pump testing, and oil control valve service and pressure adjustment.

• Controls and display: Controller and contactor panel service, drive-circuit OCL measurement, accelerator sensor checks, and display analyzer, tuning, option-setting, and matching functions.

• Fault diagnosis: Code-specific test charts, no-code troubleshooting, connector and pin-location drawings, and separate connecting and wiring diagrams.

• Factory references: Torque tables, hydraulic test specifications, fluid capacities, inspection limits, electrical test values, variant-specific service standards, and Toyota SST references.

Suited to forklift service technicians with electrical test equipment, hydraulic gauges, and the lifting equipment needed for heavy-component work.

Drive Unit, Axles, Steering, and Brakes

Exploded views accompany reduction gearing and differential case service, with bearing, seal, thrust-washer, and wear checks. Front axle work extends to the shaft, hub, bracket, and housing; rear axle procedures cover the axle assembly, steering knuckle, center support, and rear axle cylinder.

Steering coverage includes the steering wheel and mast jacket, valve troubleshooting, and relief-pressure inspection and adjustment. Brake chapters add front-brake disassembly, inspection, and reassembly, master-cylinder repair, and pedal, cable, and release-lever adjustments.

Mast Setup, Cylinders, and Hydraulic Tests

Component views distinguish the mast arrangements. Mast and lift-bracket procedures include removal, disassembly, inspection, roller replacement, chain work, and oversize-roller selection. Lift-cylinder rod shimming addresses uneven lifting; tilt-angle adjustment covers uneven forward/backward tilting.

The Hydraulic System Diagram supports natural drop, natural forward tilt, and cylinder oil-leak tests. Cylinder sections also cover the safety down valve. Oil pump disassembly is followed by an on-vehicle performance test with voltage- and mast-specific lifting-speed tables.

Separate Hydraulic Circuit Diagrams distinguish Conventional Lever and Mini Lever/Joystick Lever oil control valve layouts.

Controller Tests, Display Functions, and Fault Isolation

Volume 2 documents the traveling and load-handling AC drivers, main controller, contactor panel, lamp switch, and electronic control levers. Conventional Lever, Mini Lever, and Joystick Lever configurations have separate layouts and checks.

Administrator functions include password access and setup menus. Analyzer documentation explains diagnostic memory, I/O monitoring, and Active Test. Connector measurement tables link terminals to test conditions, so a technician can check harness and sensor faults before selecting a replacement controller.

After replacement of the main controller or multi-function display, option settings must match the truck's equipment.

Fault coverage spans traveling, load handling, and power steering, with further checks for SAS, OPS, swing lock, fork leveling, lift and tilt control, attachments, and auxiliary equipment. The Connector Drawing section, Connecting Diagrams, and Wiring Diagrams support tracing these circuits.

SAS Components and Matching Requirements

SAS system configuration drawings map Active Control Rear Stabilizer and Active Mast Function Control inputs and actuators. Component procedures cover the yaw rate sensor, swing lock cylinder, tilt angle sensor, load sensor, speed sensor, and mast lifting height switch.

Matching tables identify recalibration requirements after controller replacement; sensor, lever, mast, tilt-cylinder, or attachment work; and tire size or type changes. Standard-vehicle-condition instructions explain the setup required for calibration.

Toyota SSTs and Repair Precautions

Electrical diagnosis references the clamp-on AC/DC high tester P/N 09140-13130-71, AC controller diagnosis kit P/N 09230-13130-71, IC check pin, and dedicated sub-harnesses. Mechanical SST listings cover battery lifting, axle and drive-unit bearings, brake springs, mast support, cylinder-cap and piston-rod service, and puller/replacer work.

Toyota warns that disassembling the swing lock cylinder introduces air and makes the assembly unusable, while improper adjustment of the two-stage relief valve can damage the oil pump and other hydraulic devices. Imperfect controller connections can damage internal elements when the battery is reconnected.

Work on high-current battery circuits, raised or suspended mast components, heavy counterweights, brakes, and pressurized hydraulics requires isolation, secure lifting support, and qualified powered-industrial-truck service practice.

Examples of Differential Wear and Electrical Test Values

The differential-case inspection section specifies a 22.00 mm standard spider diameter and a 21.75 mm wear limit.

Drive motor temperature-sensor testing specifies approximately 11–15 kΩ across its connector terminals at 20°C (68°F). The accelerator potentiometer has a 1.8–3.4 kΩ resistance standard between terminals 5–6 and 1–2, alongside proportional-resistance checks for the signal terminals.