This is the factory service manual for the Mustang 2042, 2044, and 2054 skid steer loaders built from 1999 to 2006, powered by Yanmar 4TNE84 and 4TNV88-XMS diesel engines. The 143 page manual, part number 000-78025, covers specifications, safety systems, steering controls, the hydraulic and hydrostatic drive systems, chain case, engine, and electrical system.
Owners and independent mechanics can use it to troubleshoot the hydrostatic drive, service hydraulic cylinders, adjust the neutral centering device, work on the chain case and drive chain, and repair the interlock and charging circuits using the wiring diagrams. Torque tables and serial number decoding are included.
The download is a searchable PDF that opens on any device, and any page can be printed for the shop.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 3-4 | Serial Number System |
| Specifications | 5-12 | Specifications 2042, Specifications 2044, Specifications 2054 |
| Safety | 13-29 | Safety Equipment, Lift Arm Stops, Roll Over Protective Structure - Removal and Installation, Safety Interlocks, Lift Arm Bypass Switch, Parking Brake, Neutral Start Switches |
| General Information | 30-41 | System Contamination Control, Hydraulic Fluid, Maintenance Chart, Pre-Delivery Check List |
| Steering Controls | 42-51 | Troubleshooting, Neutral Centering Device - Adjustments, Neutral Centering Device - Service and Repair, Steering Controls - T-Bar, Steering Controls - Dual Lever |
| Hydraulic System | 52-73 | Hi-Flow, Troubleshooting, Flow Diagram, Controls, Lift Circuit Leak-Down Test, Tilt Circuit Leak-Down Test, Hydraulic Cylinder Testing, Hydraulic Cylinder Service and Repair |
| Hydrostatic Drive System | 74-93 | Troubleshooting, Flow Diagram, Flow Schematic, System Checks Charge Pressure, Power Check, Directional Check/Relief Valve, Hydrostatic Pump, Removal and Installation |
| Chain Case | 94-107 | Drive Chain - 2042/2044, Drive Axle and Sprocket – 2042/2044, Axle Housing R&I - 2054, Drive Chain & Sprocket R&I - 2054, Troubleshooting |
| Engine | 108-119 | Troubleshooting, Engine / Hydrostatic Pump – Removal and Installation, Cooling System, Fuel System, Injection Timing, Valve Clearance Adjustment |
| Electrical System | 120-138 | Instrument Panel, Interlock Circuit, Interlock Circuit Wiring Diagram, Control Module Tests, Brake Circuit Wiring Diagram, Troubleshooting, Charging Circuit Diagram |
| Accessories | 139-143 | Cab Door, Cabin Heater, Accessory Outlet / Int. Light / Beacon, Backup Alarm, Auto Shutdown |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Lift hydraulic cylinder locking nut torque | 215-225 ft-lbs. (292-305 Nm) | p. 67 |
| Tilt hydraulic cylinder locking nut torque | 450-500 ft-lbs (610-678 Nm) | p. 67 |
| Hydraulic filter type (return line) | 7-micron filter | p. 52 |
| Air filter replacement | as needed | p. 32 |
| Air filter part number | 420-35598 | p. 109 |
| Fuel filter water drain check interval | 10 hours | p. 32 |
| Fuel filter change interval | 1000 hours or YEAR | p. 32 |
| Battery group class | 31 | p. 5 |
| Battery cold crank rating | 700 CCA | p. 5 |
| Typical starter draw (new engine, room temperature) | 250 amps to 325 amps | p. 128 |
| Alternator belt maintenance | Tighten to Proper Deflection | p. 32 |
