This is the factory service manual for the Mustang ME12002 compact excavator, a 25,397 lb (11,520 kg) machine offered with either the John Deere 4045TF270 or the Yanmar 4TNE106T-NS diesel engine. The 334 page manual, part number 909768/BP1207, covers technical data, maintenance, the hydraulic system, both engine options, troubleshooting, and the electrical system.
Owners and independent mechanics can use it to service either engine, check hydraulic pump pressures, change hydraulic oil and filters, adjust valve clearance, torque hydraulic joints and screws, and work through no-start and low-power diagnostics. Full wiring diagrams support electrical repairs.
The download is a searchable PDF that opens on any device, and you can print whichever pages you need for the workshop.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Technical Data | General Dimensions, General Specifications, Hydraulic System Specifications, Engine Specifications, Tightening Torques | |
| Maintenance | Maintenance Chart, Check/Clean/Inspect, Fluid and Filter Changes, Lubrication, Hydraulic System Maintenance | |
| Hydraulic System | Hydraulic System Diagram, Pump Specifications, Regulator Functions, Control Valve Disassembly, Joystick Assembly | |
| John Deere Engine 4045TF270 | Engine Overview, Fuel System, Valve Tip Clearance, Cylinder Head Removal, Fuel Injection Nozzles | |
| Yanmar Engine 4TNE106T-Ns | Engine Overview, Fuel System, Valve Tip Clearance, Thermostat Inspection, Starter/Alternator Servicing | |
| Troubleshooting | Engine No-Start, Engine Output Issues, Hydraulic Pump Problems, Electrical System Diagnostics, Indicator Lamps | |
| Electrical System | Wiring Diagram Legend, Wiring Diagrams, Armrest Connections, Engine RPM Controllers, Electric Speed Control Unit |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening Torque for 1 5/16 - 12 UNF - 2B hydraulic joint | 145 ~ 181 lb.-ft. (196.0 ~ 245.0 Nm) | p. 20 |
| Adjustment screw E2 pressure for driving (Main Pressure Limiting Valve) | 4641 psi (320 bar) | p. 45 |
| Torque for M12x1.5 Metric Hose Joint | 11 lb.-ft. (15 Nm) | p. 22 |
| Torque for M10x1.0 Hydraulic fitting with Sealing washer (light application) | 7 (9) lb.-ft. (Nm) | p. 23 |
| Breather Filter initial pressure | 5.8 psi (0.4 bar) | p. 186 |
| Number of Track Rollers | 6 per side | p. 11 |
| Idle gear clearance | Standard: 0.025-0.075 (mm), Limit: 0.175 (mm) | p. 279 |
| Piston pin clearance | Standard: 0.025~0.049 (mm), Limit: 0.107 (mm) | p. 290 |
| Check Pin Lock and Line Fastenings (dipper arm and attachment) | Every 50 Hours | p. 31 |
| Main Pressure Limiting Valve Pump P1(2) | 4351±73 psi (300±5 bar) | p. 15 |
| Operating Weight with Cab | 25,397 lbs. (11,520 kg) | p. 11 |
| Bucket Tooth Breakout Force | 15,512 lbf (69.6 kN) | p. 11 |
