Komatsu AX20 Series Forklift Trucks Service & Repair Manual
⚡ Instant Workshop Specs: Komatsu AX20 Series Forklift Trucks Service & Repair Manual
Nissan H15 / H20-II & 4D92E Diesel 1.5–1.8 Ton
Drive Axle Hub Nut: 343 to 441 Nm (253–325 lb-ft)
Main Relief Pressure: 17.2 to 17.7 MPa (2,490–2,560 psi)
Hydraulic Tank: 32.0 L / Engine Sump: 3.8 L
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Technical Manual Overview: Komatsu AX20 Series Forklift Trucks Service & Repair Manual
This authoritative factory service documentation covers the Komatsu AX20 series internal combustion lift trucks (FG15, FG18, FD15, FD18). Designed for shop mechanics, field service engineers, and fleet operators, it provides full overhaul steps, hydraulic diagnostic pressure standards, and electrical diagrams.
Factory Technical Clearances & Torque Specifications
Always lubricate fastener threads with clean engine oil prior to torquing unless dry assembly is specified. Tighten all fasteners in alternating spiral sequences starting from center bolts outward.
| Component / Fastener Location | Torque Tolerance Specification |
|---|---|
| Drive Axle Wheel Nut (M14) | 343 to 441 N·m (35 to 45 kgf·m / 253 to 325 lb-ft) |
| Steer Wheel Lug Nuts (M12) | 118 to 147 N·m (12 to 15 kgf·m / 87 to 108 lb-ft) |
| Counterweight Mounting Bolt | 539 to 686 N·m (55 to 70 kgf·m / 398 to 506 lb-ft) |
| Main Hydraulic Relief Valve Setting | 17.2 to 17.7 MPa (175 to 180 kgf/cm² / 2,490 to 2,560 psi) |
| Power Steering Priority Flow Valve | 9.8 to 10.3 MPa (100 to 105 kgf/cm² / 1,420 to 1,495 psi) |
| Tilt Cylinder Front Ear Mounting Bolt | 196 to 245 N·m (20 to 25 kgf·m / 145 to 181 lb-ft) |
Complete Service Chapter Table of Contents
- Section 1: General Safety Procedures & EPA Emission Control Systems
- Section 2: AX20 Chassis & Drivetrain Specifications (FG15, FG18, FD15, FD18)
- Section 3: Periodic Maintenance Inspections (50h, 250h, 500h, 1000h, 2000h)
- Section 4: Hydraulic Control Valve, Gear Pump & Cylinder Drift Testing
- Section 5: Mast Load Roller Clearances, Lift Chain Adjustments & Carriage
- Section 6: Hydraulic Steering Axle, Brake Drum Overhaul & Wiring Schematics
Interactive Diagnostic Tools for Shop Technicians
Working on teardowns, bolt conversions, or fuel burn calculations? Access our online mechanical tool suite:
Frequently Asked Technical Questions (FAQ)
Q: What is the primary hydraulic operating pressure on the AX20 series?
A: The main relief valve is calibrated to 17.2 to 17.7 MPa (2,490 to 2,560 psi) at 2,000 engine rpm.
Q: Is registration or payment required for this manual?
A: No. Workshop Manual PDF provides 100% free direct PDF downloads with zero checkout forms, subscriptions, or paywalls.
