If you run a Komatsu WB146 backhoe loader in -5 or PS-5 configuration, this 258-page Komatsu WB146 operator manual PDF (factory publication CEAM016605) matches your machine. The maintenance schedule runs from the initial 50-hour service out to the 2000-hour interval, backed by lubrication diagrams for the main machine, 4-in-1 bucket and telescopic arm, a torque list, and troubleshooting for battery, hydraulics, brakes, transmission and engine. Operation fills roughly a third of the book: every cab control and instrument panel, the fuse and relay layout, backhoe unlocking, the pattern change lever and proven digging methods. Refill the hydraulic tank with 41 l (10.8 gal) and the engine with 9 l (2.4 gal), and check brake pedal stroke against 325 mm (12.8 in). Missed 500-hour services come back as repair bills. Bookmarked by section and text-searchable, your copy travels on a laptop or phone to wherever the WB146 is working.
What's Inside This Komatsu WB146-5, WB146PS-5 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 3-22 | Foreword, Safety Information (Safety Labels), Approved and Non-Approved Uses (Approved Functions, Non-Approved Functions) |
| Safety | 23-66 | Safety and Warning Decals (Location of Safety Decals, If Abnormalities Are Found, Safety at Job Site) |
| Operation | 67-154 | Operation Controls (in the Cab, Steering Column Switches, Front Instrument Panel and Controls) |
| Maintenance | 155-224 | Maintenance Information (Maintenance Notes, Engine Maintenance, Hydraulic System Maintenance, Carrying Out KOWA, Electrical System Maintenance, Lubrication), Wear Parts List, Fuel |
| Specifications | 225-232 | Machine Dimensions and Weights, Standard Arm, Retracted Telescopic Arm, Extended Telescopic Arm |
| Options, Attachments | 233-258 | Authorized Optional Equipment (Precautions Regarding Safety, Precautions Regarding the Installation of Equipment, Optional Equipment Measurements) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Brake pedal stroke measure A | 325 mm (12.8 in) | p. 187 |
| Automatic return sensor distance from sliding rod | 2 - 4 mm (0.078 - 0.157 in) | p. 187 |
| Hydraulic Tank Oil capacity | 41 l (10.8 gal) | p. 206 |
| Engine Oil capacity | 9 l (2.4 gal) | p. 204 |
| Fuel filter tightening | 1/2 to 3/4 of a turn | p. 209 |
| Hydraulic System Oil Capacity | 97 l (25.6 gal) | p. 215 |
| Coolant Capacity | 14L | p. 218 |
| Front Axle Oil Capacity | 7.5L | p. 211 |
| WB146-5 | ||
| Power Shuttle Transmission Oil Capacity | 20.2 l (5.3 gal) | p. 213 |
| Transmission Oil Capacity (Power Shuttle) | 20.2L | p. 213 |
| WB146PS-5 | ||
| Power Shift Transmission Oil Capacity | 28.0 l (7.4 gal) | p. 213 |
| Transmission Oil Capacity (Power Shift) | 28.0L | p. 213 |
Komatsu WB146-5, WB146PS-5 Common Problems This Manual Covers
Transmission overheating with low clutch pressure, noisy converter and lack of power
Check transmission oil level with the machine parked on level ground. Fill to the capacity listed on page 213 for your transmission type, since power shuttle and power shift units take different amounts. If the level is correct, work through the low clutch pressure, pump delivery, overheating and converter noise checks in transmission troubleshooting.
Manual Section: Transmission TroubleshootingBrakes irregular or braking not even on one side when stopping the machine
Measure brake pedal stroke against measure A of 325 mm (12.8 in) as shown on page 187. If the stroke is out of spec, get the brakes adjusted before the machine goes back to work. Then work through the irregular braking and one-sided braking checks in braking system troubleshooting and test stop on clear, level ground.
Manual Section: Braking System TroubleshootingFrequently Asked Questions
What are the torque specifications for the Komatsu WB146-5 engine, transmission, hydraulic fittings, and axle components?
The manual provides detailed torque specifications for various components. For example, the torque for a 10mm bolt is 59-74 N•m (43.51-54.57 lbf ft), and for a 20mm bolt, it is 455-565 N•m (335.59-416.72 lbf ft). Specific torque values for hose nuts, split flange bolts, flared nuts, and O-ring boss piping joints are listed in tables on pages 168-171. p. 168
How do you fix komatsu WB146-5 and WB146PS-5 engine oil pressure warning light stays on after the engine starts?
Check engine oil level with the machine on level ground and the engine stopped. Top up as needed; a full refill is 9 L (2.4 gal) per page 204. If the light stays on with the level correct, shut down and work through the oil pressure checks in the engine and electrical troubleshooting tables before running it again.
How do you fix engine overheating and temperature gauge climbing high during normal digging and loading work?
Check coolant level only with the engine cold; never open the cooling system hot. Fill as needed, keeping in mind the full coolant capacity is 14 L on page 218. If the level is right and the gauge still climbs, work through the overheating and temperature gauge checks in the engine troubleshooting table before you put it back to work.
How do you fix hydraulic pump noisy and work equipment speed slow on loader and backhoe functions?
Check hydraulic tank oil level with the machine parked and the attachments lowered. The tank holds 41 L (10.8 gal) per page 206, while the full system takes 97 L (25.6 gal). Verify the oil was changed within the 2000 hour interval on page 215, then follow the pump noise and work speed checks in hydraulic troubleshooting.
How is this Komatsu WB146-5 Operator Manual delivered?
All 258 pages arrive as one searchable PDF at checkout. Read it at the desk, then take the phone out to the machine.
Is this Komatsu WB146-5 Operator Manual printable?
Yes. Print the sections you need to take out to the shop for your own use. Standard letter or A4 paper works.
Reviews
There are no reviews yet.