Wrenching on a Gehl V400 or Mustang 4000V skid-steer loader? This 248-page service manual PDF (OEM #50950064) is the factory book for both machines, cover to cover. You get hydrostatic and hydraulic schematics for all three control layouts (T-Bar, dual joystick, and hand/foot), complete wiring diagrams, and a troubleshooting guide that walks each symptom back to its cause. Inside you'll also find module test procedures for the interlock, two-speed/ride control, and high-flow controllers, plus engine diagnostic fault codes. Fill the hydraulic reservoir to 16.75 gallons (63.4 L) with ISO VG46 oil, and change the filter element every 500 hours or annually, whichever comes first. Chasing an interlock fault without the test procedure is a wasted afternoon. Bookmarked with a live text layer: jump to any section, search any spec, and get back on the machine.
What's Inside This Gehl V400, 4000V Manual
| System | Pages | Key Topics |
|---|---|---|
| Specifications | 9-10 | Engine (Cummins QSB4.5), Horsepower, Peak Torque, Operating/Shipping Weight, Fluid Capacities, Hydraulic System Pressure/Flow, Tire Options, Bucket Capacities |
| Safety | 11-16 | General Information, Signal Words, Additional Safety Reminders, Mandatory Safety Shutdown Procedure, Lift Arm Support Device, ROPS/FOPS Raising/Lowering, Relieving Hydraulic Pressure, Loader Raising/Lowering Procedure |
| Lubrication and Maintenance | 17-22 | Hydraulic Oil Reservoir, Crankcase Oil, Chaincases, Grease Fitting Locations, Cooling System Drain Procedure |
| Mainframe and Chassis | 23-57 | Mainframe (Chassis) and Rear Grille, Engine Cover, ROPS/FOPS Components and Removal/Installation, Seat, All-Tach®/Power-A-Tach® Hitch, Lift Arm, Rear Link, Timing Link, Control Covers/Console, Crossmember, Fuel Tank, Rear Grille |
| Wheel Drives (Axles) | 59-64 | Wheel Drive Components, Drive Chain Adjustment, Axle Housing Assembly, Drive Chain Removal/Installation, Axle Assembly, Axle and Wheel Bearing Disassembly/Assembly |
| Controls | 67-94 | Control Locations (Dual Joystick/Hand-Foot/T-Bar), Control Handle Assembly Removal/Installation, Lift/Tilt Control Adjustment, Electrical Foot Throttle, Auxiliary Hydraulics Foot Pedal |
| Hydrostatic System | 95-102 | Hydrostatic Components (Two-Speed), Charge Pressure Test and Adjustment, Hydrostatic Pump Relief Valves, Hydrostatic Pump Removal and Installation, Drive Motor Removal and Installation |
| Hydrostatic Troubleshooting Guide and Schematics | 103-114 | Hydrostatic/Hydraulic Schematic - Dual Joystick Controls, Hydrostatic/Hydraulic Schematic - Hand/Foot Controls, Hydrostatic/Hydraulic Schematic - T-Bar Controls |
| Hydraulic System | 115-166 | Hydraulic Troubleshooting Guide, Standard/High-Flow Chassis Components, Auxiliary Lift Arm Hydraulics, Pressure and Load-Sense Test, Tilt/Lift Cylinder Test and Removal/Installation, Hydraulic Oil Filter Element Replacement, Fan and Fan Motor Removal/Installation |
| Electrical System | 167-202 | Instrument Panel Operation, Power Distribution Panel Test, Interlock Control Module Test, Two-Speed/Ride Control/Float Module Test, High-Flow Controller Module Test |
| Engine | 203-240 | Engine Component Removal, Oil Filter Replacement, Air Cleaner/Filter Service, Battery/Starter Removal, Radiator/Cooler Service, Engine Diagnostic Fault Codes |
| Index | 241-246 | Alphabetical Topic Listing, Page References |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic Oil Reservoir | 9 | p. 3 |
| Hydraulic System Reservoir Capacity | 16.75 Gallons (63,4 L) | p. 17 |
| Recommended Hydraulic Oil | Petro-Canada Premium HVI60, Mobil DTE 15M or equivalent that contains anti-rust, anti-foam, and anti-oxidation additives and conforms to ISO VG46. | p. 17 |
| Hydraulic oil must be at normal operating temperature | around 140° F (60° C) | p. 131 |
| coil retaining nut torque | 45 in.-lbs. (5.1 N•m) | p. 154 |
| Displacement | 4.5 L | p. 9 |
Gehl V400, 4000V Common Problems This Manual Covers
Gehl V400 skid steer sluggish lift and slow high-flow auxiliary functions when hydraulic oil is cold
Check hydraulic reservoir oil level on the dipstick and top off with ISO VG46 oil; the full system holds 92.7 L. Cycle the lift and tilt cylinders through several full strokes to purge trapped air. Warm the oil to around 140°F (60°C) before judging performance, then work through the troubleshooting procedures starting on page 103.
Manual Section: Troubleshooting Guide p. 103Hydraulic oil leaking at filter head or reservoir drain plug after routine service
Replace the hydraulic filter element every 500 hours or annually, and seat the new element squarely before tightening the housing. Inspect the reservoir drain plug, hose clamps, and fittings for weeping; retighten or replace anything damaged. Refill with ISO VG46 oil such as Petro-Canada HVI60 or Mobil DTE 15M, cycle the cylinders, then recheck the level.
Manual Section: Hydraulic Oil ReservoirLift and tilt controls dead, no cylinder movement with engine running and restraint bar down
Verify the interlock module and restraint bar switch are sending power to the lift solenoid; electrical tests start on page 167. Unplug the solenoid connector, clean any corrosion, and check coil continuity with a multimeter. When installing a replacement coil, torque the retaining nut to no more than 45 in.-lbs. (5.1 N•m) per page 154.
Manual Section: Electrical System p. 167Bucket tilts forward slowly under load, tilt cylinder drifting with controls in neutral
Measure drift with a loaded bucket; more than 0.4 inch (10 mm) of cylinder extension in 15 minutes fails the spec on page 133. Warm the oil to around 140°F (60°C) first so the reading is honest. If drift exceeds the limit, inspect tilt cylinder piston seals and the control valve work section, and replace worn seals.
Manual Section: Control System Diagnostics and Adjustments p. 133Engine cranks slowly or refuses to start in cold weather after sitting overnight
Test battery voltage and load-test it before condemning the starter; pull the battery access cover under the floor plate, shown on page 41. Clean and tighten both cable terminals. Verify fuel supply from the 118.3 L tank and replace clogged filters, then follow starter engagement and fault code checks in the engine section starting on page 203.
Manual Section: Engine p. 203Frequently Asked Questions
What are the torque specs for Gehl V400 engine bolts?
The manual provides various torque specifications for engine components. For example, some components require 170 ft-lbs, others 35 ft-lbs, 39 ft-lbs, 67.5 ft-lbs, or 55 ft-lbs. The oil drain requires 88 ft-lbs. p. 211
What do Gehl V400 error codes mean and how to fix them?
The Gehl V400 service manual lists Cummins QSB4.5 Engine Diagnostic Fault Codes on pages 230-240, providing a 'J1939 SPN Description' and 'Cummins Description' for each code to explain its meaning. For remedies, the manual directs users to general troubleshooting guides within the relevant chapters, such as the Engine Troubleshooting Guide on pages 209-210, rather than providing specific fixes per fault code. p. 229
Where to find Gehl V400 service manual with error code list?
The error code list for the Cummins QSB4.5 engine in the Gehl V400 is located in the 'Engine' chapter, specifically under 'Cummins QSB4.5 Engine Diagnostic Fault Codes' on pages 230-240. The manual also details how to view diagnostic trouble codes (DTC) on the Information Center Electronic Display in the 'Electrical System' chapter on page 196. p. 229
What are the replacement specifications for Oil filter?
The engine oil filter element should be replaced every 500 hours of service or annually, whichever occurs first, in conjunction with the engine oil change. A specific part number for the engine oil filter is 50350434. p. 18
What is the capacity of the hydraulic oil reservoir for the Gehl V400?
The hydraulic oil reservoir for the Gehl V400 and Mustang 4000V skid-steer loaders has a capacity of 16.75 U.S. gallons (63.4 liters). It should be drained and refilled after every 1000 hours of operation or annually. p. 17
How will I receive this Gehl V400 / Mustang 4000V Service Manual?
You get a 248-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Am I able to print pages from this Gehl V400 / Mustang 4000V manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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