Komatsu WB91R-2 / WB93R-2 Backhoe Loader Factory Service & Repair Manual • P/N WEBM000404
Komatsu Models Covered & Key Technical Specifications
Models: Komatsu WB91R-2, Komatsu WB93R-2
Sub-models / Variants: Backhoe-Loader, Avance
Serial Numbers: WB91R-2 91F20145 and up, WB93R-2 93F23453 and up
Technical Data:
- Transmission type: 4-speed forward and reverse with electrically-controlled selector
- Steering unit type: LAGCSDS160P
- Steering displacement: 160 cc/rev
- Shovel dump relief pressure: 230 bar
- Boom safety valve pressure: 350 bar
- Arm safety valve pressure: 230 bar
- Engine oil (crankcase) capacity: 7.9 liters
- Hydraulic circuit capacity: 150 liters (specified), 92 liters (refill)
- Fuel tank capacity: 130 liters
- Front axle differential capacity: 6.5 liters
- Rear axle differential capacity: 14.5 liters
Komatsu Manual Features & Content Preview
Komatsu WB91R-2 and WB93R-2 Technical Data and Manual Details
- Official Komatsu Utility shop manual, publication WEBM000404
- Covers WB91R-2 and WB93R-2 Avance series backhoe loaders with serial numbers starting from 91F20145 and 93F23453
- 504 pages of technical diagrams, component specifications, and system descriptions
- Acts as the primary technical reference for drivetrain, hydraulic system, and structural assembly repair
- Instant download delivered as an indexed, searchable PDF to quickly find chapters and appendices on the shop floor
Component and System Documentation
Accurate documentation is critical for efficient diagnostics and component overhauls. This text details the functional operation and machine structure of major Komatsu assemblies. You will find complete breakdowns of the power train, including transmission internals and gear selector logic, alongside detailed descriptions of the front and rear axle planetary systems.
The hydraulic sections thoroughly map out the variable-flow pump, control valve blocks for both shovel and backhoe functions, and the Closed Center Load Sensing System (CLSS). It also outlines the operational mechanics of the air-conditioning unit and brake pumps. Always review the included system safety valve protocols and pressure relief procedures prior to initiating maintenance to ensure operational safety and prevent equipment damage.
Hydraulic and Mechanical Specifications
Precision drives reliability in the workshop. The manual supplies extensive reference tables detailing standard tightening torques for bolts, nuts, and flared pipe fittings to match factory standards. Fluid capacity charts dictate precise volumes for the engine, transmission, and hydraulic reservoirs based on operating ambient temperatures.
For advanced troubleshooting, the reference material defines exact pressure thresholds for PC and LS valves. Technicians will also utilize the documented electrical wire color coding and thickness parameters to accurately trace wiring harness faults during any demanding repair job.
Customer Reviews
Read what our customers say about this Komatsu Backhoe Loader manual and share your own experience.