Drive unit, electromagnetic brake, hydraulic system, mast uprights, reach pantograph: the 209-page Komatsu FR15K-3, FR18K-3, and FR23K-3 service manual PDF, factory number SM151, takes each system on these electric AC stand-up rider narrow aisle reach trucks from disassembly through inspection to reassembly. Hydraulic circuit diagrams trace oil flow from pump through control valve to the lift, reach, and tilt cylinders. When a cylinder drifts or the lift goes spongy, troubleshooting tables point you to the cause, and chain inspection procedures show how to catch stretch before a worn link becomes a dropped load. Fill the hydraulic tank with 18.6 liters, then torque the drive unit installation bolts to 284-333 N·m. Second shift, one dead reach truck, nobody left to ask: that is when this book earns its keep. Bookmarked and text-searchable, the PDF walks you from fault to a truck that lifts again.
What's Inside This Komatsu FR15K-3, FR18K-3, FR23K-3 Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction and Safe Work | 1-14 | Electric AC-powered Stand-Up Rider, Narrow Aisle Single Reach, Double Reach, Models Covered, Maintenance Facility Requirements, Maintenance Workshop, Work Clothing, Tools and Gauges |
| General Specifications | 15-20 | Chassis Specifications, Mast Specifications, Performance Specifications, Motor Specifications, Battery Specifications |
| Drive, Caster and Steering | 21-45 | Drive Unit Parts, Gear Disassembly, Gear Assembly, Gear Inspection, Drive Unit Troubleshooting, Caster Wheel Removal, Caster Spring Adjustment, Link Pin Inspection |
| Brake System | 46-55 | Brake Linkage Disassembly, Pedal Bracket, Pedal Pin, Micro Switch, Brake Pedal, Pedal Pad, Electromagnetic Brake, Spline Hub |
| Hydraulic System | 56-71 | Hydraulic Circuit Diagram, Oil Piping Replacement, Hydraulic Hose, Hydraulic Pipe, Hydraulic Pump Removal, Cushion Bracket, Motor Bracket, Pump Installation |
| Motors | 72-85 | Traction Motor, Hydraulic Motor, EPS Motor, Rotor Component, Armature Component, Motor Troubleshooting |
| Electrical Equipment | 86-103 | Fet Module, Capacitor, Mpu Board, Heat Sink, Current Sensor, EPS Controller, EPS/Dsp Board, Grommet |
| Reference, Installation and Periodic Maintenance | 104-115 | Standard Maintenance Work Time, Maintenance System, Man-Hours, Truck System Requirements, Mast Installation, Mast Inspection, Daily Inspection, 250-Hour Inspection |
| Mast Uprights | 116-149 | Upright Description, Outer Upright Assembly, Intermediate Upright Assembly, Preparation, Upright Disassembly, Cable and Chain Sheaves, Free Lift Cylinder, Elongation |
| Reach Pantograph | 150-209 | Electrical Plug, Hydraulic Hoses, Chain Anchor Pins, Rail Assemblies, Chain Hoist, Fork Carriage, Pantograph Arm Rollers, Thrust Pads |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Drive unit installation bolts tightening torque | 284 - 333 N·m | p. 26 |
| EPS gear box gear oil volume | 0.35 L | p. 29 |
| Cold storage (CS) type oil | ISO VG15 (SAE No. 10W) | p. 67 |
| Quantity of oil | 18.6 L | p. 63 |
| FET module main terminal part (M6) tightening torque | 3.5 - 4.5 N·m | p. 94 |
| Main contactor main terminal part (M8) tightening torque | 12.7 - 14.7 N·m | p. 99 |
| backrest capscrews torque | 145 ft.-lbs. (195 Nm) | p. 113 |
| Torque jam nuts to adjustment nuts | 100 - 200 Nm (74 - 148 Ft-Lbs) | p. 128 |
| Panel (1) installation bolts torque | 4.7 N·m | p. 24 |
| Drive unit installation bolts torque | 284 - 333 N·m | p. 28 |
| EPS gear box oil volume | 0.35 L | p. 29 |
| Gearbox oil volume | 3.1 L | p. 30 |
