This Service Manual covers the Gehl 4640E Power2 and 5240E Power2 skid-steer loaders, along with the Mustang 2056 Series II, all built with the Tier 4i Yanmar 4TNV98-ZNMS2 diesel engine. It is the factory manual, form number 50950037 Revision A, and runs 263 pages.The manual is arranged by system and covers safety, lubrication, the mainframe, wheel drives, controls, the hydrostatic and hydraulic systems, the electrical system, and the engine. You get troubleshooting guides, pressure and flow specifications, torque values, fluid capacities, electrical schematics, and Engine ECU fault codes.With this PDF download an owner or independent mechanic can diagnose a no-start, chase weak hydraulics, service the drive chains, or read fault codes using the same reference the dealer uses. A full index and bookmarks help you find the exact procedure fast.
What's Inside This Gehl, Mustang 4640E Power2, 5240E Power2 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | - | - |
| Lubrication System | - | Hydraulic Oil Reservoir, Crankcase Oil, Chaincases, Grease Fitting Locations, Cooling System Drain Procedure |
| Mainframe | - | Chassis Components, ROPS/FOPS Removal and Installation, Lift Arm Components, Fuel Sensor Removal and Installation, Rear Grille Removal and Installation |
| Wheel Drives | - | Wheel Drive Components, Drive Chain Adjustment, Axle Housing Assembly Removal and Installation, Axle and Wheel Bearing Disassembly |
| Controls | - | Control Locations, Wheel Drive Components, Lift and Tilt Components, Control Handle Removal and Installation, Control Handle Position Adjustment |
| Hydrostatic System | - | Single-Speed Hydrostatic Components, Two-Speed Hydrostatic Components, Charge Pressure Test and Adjustment, Hydrostatic Pump Removal / Installation, Troubleshooting Guide |
| Hydraulic System | - | Standard Auxiliary Components, High-Flow Auxiliary Components, Pressure Tests, Lift Cylinder Test, Control Valve Removal and Installation, Troubleshooting Guide |
| Electrical System | - | Description of Operation - Instrument Panels, Troubleshooting Guide, Fuse Panel Decal Illustration and Photo, Interlock Control Module Test, Electrical Schematics |
| Engine | - | Troubleshooting Guide, Engine Components, Radiator/Cooler Components, Battery and Battery Tray Removal, Engine Removal and Installation, Engine ECU Fault Codes |
| Index | - | Alphabetical Listing of Topics, Page References for Components, Procedures, Specifications |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Wheel nut torque | 180 ft.-lbs. (244 N•m) | p. 60 |
| Fan belt deflection | ½" (13 mm) under a load of 20 lbs. (90 N) | p. 234 |
| Drive chain deflection | ½" @ 20 lbs. force (13 mm @ 89 N) | p. 60 |
| Engine Oil Capacity (with filter change) | 9.5 US qts (9.0 L) | p. 9 |
| Chaincase Oil Capacity (each side) | 8.0 US qts (7.57 L) | p. 9 |
| Engine Coolant Capacity | 9.7 US qts (9.18 L) | p. 9 |
| Standard Hydraulic System Pressure | 2750 PSI (190 bar) | p. 9 |
| 4640E Power2 | ||
| Fuel Tank Capacity | 14.0 US gal (53 L) | p. 9 |
| Hydraulic Reservoir Capacity | 15.0 US gal (56.8 L) | p. 9 |
| High-Flow Hydraulic System Pressure | 2600 PSI (179 bar) | p. 9 |
| 5240E Power2 / 2056 Series II | ||
| Fuel Tank Capacity | 16.0 US gal (60 L) | p. 11 |
| Hydraulic Reservoir Capacity | 15.0 US gal (57 L) | p. 11 |
Gehl, Mustang 4640E Power2, 5240E Power2 Common Problems This Manual Covers
No-start or engine will not fire
The engine cranks but does not fire, or only starts after fuel work. A weak or failing fuel pump or fuel solenoid is the most commonly reported cause on these machines.
Manual Section: EngineEngine overheats under load
Overheating or a performance drop under load often traces to low coolant, a clogged radiator, dirty filters, or restricted cooling airflow. The Engine section covers radiator and cooler service.
Manual Section: EngineWeak steering, lift, or attachment response
Sluggish steering, lift, or attachment functions usually point to low hydraulic fluid, worn or damaged hoses, or restriction in the circuit. The Hydraulic System chapter covers pressure tests and cylinder tests.
Manual Section: Hydraulic SystemPoor traction or excessive vibration
Slipping, vibration, or poor traction is commonly tied to tire wear, low tire pressure, or drive chain and sprocket wear and misalignment. The Wheel Drives section covers chain adjustment and axle service.
Manual Section: Wheel DrivesElectrical fault or warning indication
Electrical faults and interlock warnings need methodical diagnosis. The Electrical System section provides the instrument panel description, an interlock control module test, and full schematics.
Manual Section: Electrical SystemDrive feels weak or uneven
Weak or uneven drive can come from low charge pressure or a hydrostatic pump fault. The Hydrostatic System chapter covers charge pressure test and adjustment and pump removal.
Manual Section: Hydrostatic SystemFrequently Asked Questions
Which machines does this manual cover?
It covers the Gehl 4640E Power2 and 5240E Power2 skid-steer loaders and the Mustang 2056 Series II, all with the Tier 4i Yanmar 4TNV98-ZNMS2 engine.
What is the standard hydraulic system pressure?
The specifications list a standard hydraulic system pressure of 2750 PSI (190 bar) for all models. p. 9
What is the wheel nut torque?
The service data specifies a wheel nut torque of 180 ft.-lbs. (244 N•m). p. 60
Does it cover electrical schematics and fault codes?
Yes. The Electrical System section includes schematics and troubleshooting, and the Engine section documents the Engine ECU fault codes.
What format is this manual in?
Instant PDF download. The full 263-page searchable Service Manual lands in your hands right after payment, ready to open on a laptop, tablet, or phone in the shop.
Can I print specific sections of this Gehl, Mustang 4640E Power2, 5240E Power2?
No restrictions at all. Print single pages, whole chapters, or the entire manual. The PDF is fully unlocked.
Does this Gehl, Mustang 4640E Power2, 5240E Power2 manual include hydraulic?
Yes. The manual includes hydraulic circuit diagrams, system schematics, and component specifications with pressure ratings.
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