Need factory-level repair data for your Gehl 4640E Power2 or 5240E Power2? This 263-page Gehl/Mustang service manual (OEM #50950037 Rev. A) is the official factory reference for both Power2 skid-steer loaders and the Mustang 2056 Series II. It packs 70 pages of step-by-step procedures, 40 pages of exploded-view diagrams, full hydrostatic and hydraulic schematics with complete pressure test sequences, and wiring diagrams for every electrical circuit. The troubleshooting chapters walk through system-by-system fault isolation, Engine ECU fault codes, and interlock control module tests. Drive chain deflection runs ½" at 20 lbs. force; wheel nuts torque to 180 ft.-lbs. (244 N•m). Every hour your loader sits idle costs money. Bookmarked and keyword-searchable, it pulls up on a tablet so you find the spec in seconds and get back to work.
What's Inside This Gehl, Mustang 4640E Power2, 5240E Power2 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | - | General Information, Signal Words, Mandatory Safety Shutdown Procedure, Lift Arm Support Device, ROPS/FOPS Raising/Lowering |
| 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
Gehl 4640E Power2 turns over but will not start or fire in cold weather conditions
Inspect the fuel pump and solenoid wiring using the diagram. Test the solenoid for proper pull-in voltage. Drain the engine oil and refill with exactly 9.5 US qts (8.5 L) including the filter change. Bleed the fuel system to remove trapped air.
Manual Section: Engine Troubleshooting GuideLift and tilt controls barely respond and cylinder action is extremely slow
Confirm the hydraulic reservoir level and inspect all hoses for leaks. Test the standard system pressure against the 2750 PSI (190 bar) target. Trace flow restrictions on the hydraulic schematic. Replace any blown lines and clean the intake screen.
Manual Section: Hydraulic System Troubleshooting GuideEngine overheats fast under heavy load and loses performance while running high-flow attachments p. 234
Examine the radiator for blockages and check the fan belt deflection. Adjust the tension until deflection reads ½" (13 mm) under a load of 20 lbs. (90 N) as specified on page 234. Drain the cooling system and refill with 9.7 US qts (9.18 L) of fresh coolant.
Manual Section: Engine Troubleshooting GuideExcessive vibration and poor traction over rough terrain or while plowing snow p. 60
Inspect the drive chains and sprockets for wear. Verify the tire pressure is correct for your application. Torque all wheel nuts to 180 ft.-lbs. (244 N•m) per the specs on page 60. Top off each chaincase to 8.0 US qts (7.57 L).
Manual Section: Wheel DrivesFrequently Asked Questions
What do error codes mean on a Gehl 4640E Power2?
The Engine Malfunction Lamp displays codes when the ECU detects a failure on a 4640E Power2. For what each code means, check the 'Engine Diagnostics chart' in the Engine chapter, specifically the 'Yanmar 4TNV98-ZNMS2 Engine ECU Fault Codes' tables on pages 244-246.
What are the torque specs for the wheel nuts on a Gehl 5240E Power2?
Wheel nut torque on the Gehl 5240E Power2 is 180 ft.-lbs. (244 N•m). Apply this value when reinstalling the wheels and tires after jobs such as drive chain adjustment or axle housing assembly removal and installation.
How to find Gehl 4640E Power2 error codes
Watch the Engine Malfunction Lamp on the left instrument panel of your 4640E Power2. It lights when the engine ECU detects a failure, and the codes themselves appear when you turn the keyswitch to the “ON” position. Look up what each one means in the 'Yanmar 4TNV98-ZNMS2 Engine ECU Fault Codes' chart on pages 244-246 of the Engine chapter.
What format is this Gehl, Mustang 4640E Power2, 5240E Power2 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.
Document Quality
This document is a scanned PDF, but it includes an optical character recognition (OCR) layer, so you can search and copy text from its pages. The text is crisp and easy to read throughout. Diagrams and illustrations are clear with sharp lines and readable labels, and photographs are also functional. Pages are clean and free of significant scan artifacts, though some pages are intentionally left blank or contain section notes.
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