Returning your compact excavator to factory spec requires exact data. This 158-page Mustang ME5002, ME6002, and ME6502 Service Manual (OEM #918172) provides full hydraulic system diagrams covering the pilot oil supply unit, main valve block, shuttle valve block, and swivel joint. It also includes dedicated electrical wiring diagrams with component positions and fuse box layouts. Torque specifications detail hydraulic fittings, coarse and fine-pitch fasteners, diesel engine components, and hydraulic pump mounting. You will find exact figures, like the pilot oil pressure holding at 508 psi (35 bar) across all three models, or the main pressure for the ME6002 running at 3,553 psi (245 bar) at pumps P1 and P2. When forum threads fail to explain the pilot control valve procedure or hose burst protection valve steps, this bookmarked and searchable PDF delivers the answers.
What's Inside This Mustang ME5002, ME6002, ME6502 Manual
| System | Pages | Key Topics |
|---|---|---|
| Technical Data | 5-20 | Dimensions, Bucket and Geometry, Lift Capacity Charts, Hydraulic System Settings, Auxiliary Hydraulics, Diesel Engine Settings |
| Maintenance | 21-58 | Maintenance Schedule, Maintenance - General, Lubricants, Lubrication Chart, Hydraulic System, Hydraulic Pump, Hose Burst Protection Valve, Drive Unit |
| Hydraulics | 59-110 | Hydraulic System / Diagrams, Position of Components, Hydraulic Pump, Pilot Oil Supply Unit, Main Valve Block, Pilot Control Valves, Swivel Unit, Shuttle Valve Block |
| Diesel Engine | 111-116 | Diesel Engine Specifications, Fuel Line Diagram, Battery, Radiator, Cylinder Head Bolt Tightening / Loosening Order |
| Electrical | 117-144 | Electrical System Diagrams, Electrical System Component Positions, Electrical Wiring Diagrams, Electrical Connections, Fuse Box |
| Operating Elements | 145-154 | Machine Overview, Component Description, Cab Equipment and Controls, Lifting the Excavator |
| Torque Specifications | 155-158 | Hydraulic Fittings, General Fasteners, Diesel Engine Components, Hydraulic Pump Mounting, Swivel Unit Fasteners, Control Oil Unit Fasteners |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| ME5002 | ||
| Diesel engine cylinder head bolt (1st pass) | 64 - 69 lb-ft (87.0 - 93.0 Nm) | p. 19 |
| Diesel engine connection rod bolt | 33 - 40.5 lb-ft (45 - 55 Nm) | p. 19 |
| Main pressure limiting valve Pump P1, P2 | 3336 psi (230 bar) | p. 16 |
| Hydraulic oil tank capacity | 16.1 gals (61 L) | p. 16 |
| Hose burst protection valve clearance | 0.047" (1.2 mm) | p. 17 |
| Cylinder head bolt tightening (1st pass) | 34 - 39 lb-ft (46 - 53 Nm) | p. 54 |
| ME6002 | ||
| Main pressure limiting valve Pump P1, P2 | 3553 psi (245 bar) | p. 16 |
| Hydraulic oil tank capacity | 21.1 gals (80 L) | p. 16 |
| All Models | ||
| Pilot oil pressure | 508 psi (35 bar) | p. 16 |
| Min. revolution speed (idle) - no load | 1100 rpm | p. 18 |
| Fuel injection pressure | 3191 - 3336 psi (220 - 230 bar) | p. 18 |
| ME6002, ME6502 | ||
| Hose burst protection valve clearance | 0.059" (1.5 mm) | p. 17 |
Mustang ME5002, ME6002, ME6502 Common Problems This Manual Covers
Hydraulic system low pressure; bucket lifts slowly or stalls under load p. 29
Test pumps P1 and P2 by connecting a pressure gauge following the procedure starting on page 29. Main relief should hold 3336 psi (230 bar) at full flow. If pressure is low, inspect the primary pressure limiting valves for wear or contamination, then bleed the pump suction line to eliminate air ingestion.
Manual Section: HydraulicsEngine cranks but won't fire, solenoid stop clicks and releases without holding fuel rack p. 117
Inspect wiring to the solenoid stop for heat damage, corrosion, or loose pins after checking battery connections. A solenoid that chatters without latching typically has a bad ground or low coil voltage. Verify circuit continuity using the wiring diagrams on page 117. Replace the solenoid if wiring checks out; once running, confirm idle holds at 1100 rpm minimum.
Manual Section: Diesel EngineTracks go slack within a few hours of adjustment, tension won't hold on either side p. 55
Set track tension so deflection at the center of the top run measures 5/8"-1" (15-25 mm) per the spec on page 55. If tension drops again, inspect the idler wheel for wear and check the grease fitting on the tensioner cylinder for leaks before re-tensioning. A seized idler bearing is a common cause of rapid slack.
Manual Section: MaintenanceHydraulic pump cavitating after fluid change, grinding noise and slow cycle times p. 16
Purge air from the hydraulic pump and suction line before operating under load. Check hydraulic oil level at the tank and add fluid to bring it within the indicated range. After bleeding, verify pilot pressure holds at 508 psi (35 bar) per the spec on page 16. If cavitation continues, inspect the suction strainer for blockage.
Manual Section: HydraulicsRough idle and black smoke at startup, power loss under digging load p. 18
Test each injection nozzle for proper spray pattern and opening pressure. Injection pressure should be 3191-3336 psi (220-230 bar) per specs on page 18; replace the nozzle spacer shim if pressure is low or uneven. Check atomization quality and inspect for post-shutoff drips, which indicate a leaking nozzle seat.
Manual Section: Diesel EngineFrequently Asked Questions
How will I receive this Mustang ME5002, ME6002, ME6502 Service Manual?
Immediate download of the complete 158-page searchable Service Manual. Access it on any device — laptop at your desk or phone in the field.
Are there any print restrictions on this Mustang ME5002, ME6002, ME6502 manual?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Does this Mustang ME5002, ME6002, ME6502 manual include wiring diagrams?
Included. The Mustang ME5002, ME6002, ME6502 Service Manual covers complete wiring harness diagrams, electrical circuits, and connector pinouts.
Document Quality
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