This is the factory Mustang Service Manual for the ME1503, ME1903, and ME2203 compact excavators, part number 918174, a 124 page PDF. These machines run Yanmar diesel power, the 3TNE68-ENSR, 3TNE74-ENSR2, and 3TNV76-SNS, and the manual separates the specifications by model and serial number.
Inside you get technical data with primary dimensions, lift capacity charts, and tightening torques, scheduled maintenance and lubrication, the full hydraulics chapter with pump, pilot oil supply, main valve block, dozer blade valve, and swivel and drive units, diesel engine coverage, electrical wiring, operating elements, and torque specifications.
From a hard-start diagnosis to a main valve block rebuild, this manual gives you the procedures and grounded torque values to service these excavators correctly. It is a searchable PDF you can download now and print any page you need at the bench.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Technical Data | 5-32 | Primary Dimensions, Bucket & Geometry, Lift Capacity Charts, Hydraulic System, Tightening Torques |
| Maintenance | 33-51 | Maintenance Schedule, Lubricants, Hydraulic System, Hydraulic Pump, Hose Burst Protection, Drive Unit, Swivel Unit, Auxiliary Hydraulic System |
| Hydraulics | 52-97 | Hydraulic Diagram, Hydraulic Pump, Pilot Oil Supply Unit, Main Valve Block, Dozer Blade Valve, Pilot Control Valves, Swivel Unit, Drive Unit |
| Diesel Engine | 98-101 | Diesel Engine Overall, Fuel Supply Line, Radiator (Position Diesel Engine Fan/Air Circulation Guide Cover, Pressing Fan, Sucking Fan) |
| Electrical | 102-111 | Electrical Diagram Legend, Cab Wiring, Diesel Engine Wiring, Chassis Wiring, Connection Cable Wiring, Relay Box, Relay Arrangement, Fuse Box |
| Operating Elements | 112-120 | Major Components, Cab Equipment and Controls, Instrument Panel, Towing the Compact Excavator, Lifting the Compact Excavator, Tilting the Superstructure, Undercarriage Telescoping |
| Torque Specifications | 121-124 | Hydraulic Fittings with Various Seals (Straight Pipe Fitting with Thread and Screwed Plug, Non-Return Valve with Elastic Seal, Identification Aid Outside Ø) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Turntable M12 x 10.9 torque | 88.5 lb-ft. (120 Nm) | p. 31 |
| Hydraulic Filter Insert First Replacement Interval | Every 50 h (weekly) | p. 36 |
| Fuel Filter Replacement Interval | Every 500 h (12 months) | p. 35 |
| Metric hose joints (Light Version DKOL) DN 05 RA 6L M12 x 1.5 torque | 11 lb-ft. (15 Nm) | p. 28 |
| Track Tension Deflection | 0.6—0.8” (15—20 mm) | p. 50 |
| Track Roller M10 x 10.9 torque | 47.2 lb-ft. (64 Nm) | p. 31 |
| Main Pressure Limiting Valve, Pump P1, P2 setting | 2900 ±44 psi (200 ±3 bar) | p. 20 |
| Hydraulic Oil Tank Capacity | 5.5 gal. (21 L) | p. 20 |
| ME1503—2203 | ||
| Hose Burst Protection Valve Clearance S (Dozer Blade Cylinder) | 0.028" (0.7 mm) | p. 22 |
| ME1503 | ||
| ME1503 Maximum Dump Height (Standard) | 8' 4-1/4" (2545 mm) | p. 10 |
| ME1903 | ||
| ME1903 Maximum Dump Height (Standard) | 9' 3/4" (2760 mm) | p. 11 |
| ME2203 | ||
| ME2203 Maximum Dump Height (Standard) | 9' 1-1/2" (2780 mm) | p. 11 |
