Four electric lift trucks in Komatsu's FBM and FB line, from the FBM10M through the FB18M-2, share this 72-page Komatsu FB15M service manual PDF, factory document SM019. Troubleshooting flowcharts fill nearly a third of the book, tracing a dead FR contactor, a truck that won't move in either direction, or travel speed that ignores the accelerator back to the failed component. Wiring diagrams for the 24V USA, 24V and 48V pump controller, and pump contactor configurations close it out, and the chopper circuit gets its operating theory explained mode by mode, so you can read a thyristor check instead of guessing at one. Gap the 48V FR contactor microswitch at 0.5 to 0.7 mm; set LIFT first-stage lever travel to 15 to 25 mm at the cam. Meanwhile the truck sits and pallets pile up. Print what you need and let it get greasy; the bookmarked, keyword-searchable file stays clean on your drive.
Complete the set for your FBM10M-2, FBM13M-2, FB15M-2…
- Operator Manual: Komatsu FB10M-2 to FB18M-2 Operator Manual
What's Inside This Komatsu FBM10M-2, FBM13M-2, FB15M-2, FB18M-2 Manual
| System | Pages | Key Topics |
|---|---|---|
| Electrical System Overview | 2-3 | Stop Lamp Sw, Power Steering Motor, Chopper Panel, Motor, Service Data, Brush Height |
| Switch and Contactor Adjustment | 4-5 | Control Valve Lever Cam Adjustment, Parking Brake, Lever Travel From Neutral, Tire Swing Switch, Contactor Fr Contactor Bypass Contactor, Contactor Microswitch Clearance |
| Controller System and Control Circuit | 6-9 | Mounting Position and Outline of Controller, Outline, Safety Circuits, Schematic Control Circuit, Symbol and Name Table, Fr Contactor, Accelerator, Travel Contactor Switch Circuit |
| Chopper and Contactor Panel Components | 10-15 | Contactor Panel, Diode Plugging and Flywheel, Plugging, Fr Contactor, Bypass Contactor, Chopper Circuit, Chopper Panel, 48V Type |
| Chopper Circuit Operation | 16-20 | Principle of Changing Speed in Travel Motor, Average Motor Voltage, Chopper System, Mode 1, Mode 2, Mode 3, Mode 4, Mode 5 |
| Inspection and Adjustment | 21-22 | Function and Adjustment of Controller Circuit, Current Limit Circuit, Overheat Prevention Circuit, Plugging, Runaway Prevention Circuit, Pcs, Turning Control |
| Main Electrical Parts Inspection | 23-45 | Inspection Tool and Measurement Device, Tightening Torque, Voltage Check, Print Card, Thyristor Check, Diode, Resistance, Condenser |
| Troubleshooting | 46-68 | Before Starting Troubleshooting, Methods of Using Flowchart, Explanation of Terms Used in Troubleshooting Flowchart, Precautions When Troubleshooting, Problem Symptom Table |
| Wiring Diagrams | 69-72 | 24V Usa Type, 24V Hydraulic Pump Controller Type, 48V Hydraulic Pump Controller Type, 24/48V Pump Contactor Type |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Contactor microswitch clearance (24V FR contactor, 24V/48V Bypass contactor) | 30 - 50% of stroke | p. 5 |
| Contactor microswitch clearance (48V FR contactor) | 0.5 - 0.7 mm | p. 30 |
| Control valve lever cam adjustment (Lift 1st lever travel) | 15 - 25 mm | p. 4 |
| Control valve lever cam adjustment (Lift 2nd lever travel) | 55 - 65 mm | p. 4 |
| Voltage check at CN1 (10) | approx. 13 V | p. 51 |
| Drive motor rated output (24V) | 2.4 kW | p. 3 |
| Pump motor rated output (48V) | 6.6 kW | p. 3 |
| Pump motor rated output (24V) | 6.5 kW | p. 3 |
| Power steering motor rated output | 0.45 kW | p. 3 |
| Drive motor commutator diameter repair limit (24V) | 77 mm | p. 3 |
| Drive fuse capacity (24V) | 350 A | p. 10 |
