Brakes dragging? Hydrostatic drive going soft? This 198-page OEM manual covers brake fault diagnosis, hydrostatic drive rebuild, and bearing inspection for ML42, ML43, 318, and 418 loaders.
Need factory service data for your Mustang ML42 wheel loader? This 198-page manual (OEM #50940189) pulls factory-level procedures for every machine into one file, covering ML42, ML43, 318, 418, and 418 Telescopic, plus models 308 63, 311 66, and 311 00. Hydraulic schematics map the hydrostatic drive and loader circuits; wiring diagrams trace the SUSMIC control system and harness routing across every variant; Perkins 704-30 engine work is covered step by step. A full torque table, hydrostatic troubleshooting charts, and exploded axle and steering ram views fill out the rest. The 2955 cm³ Perkins makes 37 kW on the 318 or 44 kW on the 418 at 2300 RPM; seat the lift ram piston to 1350–1400 Nm. Stop chasing specs across forum threads. Bookmarked by system and keyword-searchable, it opens on your phone right at the machine.
What's Inside This Mustang ML42 & variants Manual
| System | Pages | Key Topics |
|---|---|---|
| 308S_Ivz | 3 | Controls, Specifications, Maintenance, Sealing Kits, Lubricants, Perkins Engine, Hydrostatic Drive, Axles |
| 308Std00 | 4-5 | Specifications (Wheel Loader 318 / 418, Frame, Engine, Power Train, Axles, Brakes, Steering, Work Hydraulics, Loader Unit, Electrical System, Tyres 318, Tyres 418, Weights, Noise Levels, Vibration, Dimensions, Coolant Compound Table, Tightening Torques, Wheel Loader 418 Teleskopic, Tyres) |
| 308Std10 | 6-21 | Td Specifications (Wheel Loader 318 / 418, Frame, Engine, Power Train, Axles, Brakes, Steering, Work Hydraulics, Loader Unit, Electrical System, Electrical Fuses 318 / 418, Tyres 318, Tyres 418, Weights, Noise Levels, Vibration, Dimensions, Vehicle Dimensions, Coolant Compound Table, Tightening Torques, Specific Tightening Torques, Wheel Loader 418 Telescopic) |
| 308S0000 | 22-23 | Maintenance (Hydraulic System, Specific Safety Instructions, Checking the Hydraulic Oil Level, Topping Up the Hydraulic Oil, Changing the Hydraulic Oil, Hydraulic Oil Reflux Filter, Gearbox and Axles, Rear Axle Transfer Gearbox, Front and Rear Axle Differentials, Engine Fluids and Lubricants, Service and Sealing Kits, Plan 318 / 418, Models 308 63 / 311 66, Plan Model 311 00) |
| 308S0010 | 24-33 | Maintenance (Hydraulic System, Specific Safety Instructions, Checking the Hydraulic Oil Level, Oil Level Glass on the Hydraulic Oil Tank, Topping Up the Hydraulic Oil, Changing the Hydraulic Oil, Hydraulic Oil Tank, Oil Drain Valve with Cap, Important Information for the Use of Biodegradable Oil, Subsequent Change From Mineral Oil to Biodegradable Oil, Label: Biodegradable Oil, Hydraulic Oil Reflux Filter, Changing the Filter Insert, Position of Hydraulic Oil Reflux Filter, Reflux Suction Filter: Exploded View, Gearboxes and Axles, Rear Axle Transfer Gearbox, Checking the Oil Level, Rear Axle Transfer Gearbox Diagram, Topping Up the Oil Level, Changing the Oil, Front and Rear Axle Differentials, Checking the Oil Level on the Front and Rear Axle Differentials, Engine Fluids and Lubricants, Service and Sealing Kits, Service Kit for “1st Inspection”, Service Kit for Maintenance Plan “B”, Service Kit for Maintenance Plan “C”) |
| 308S0020 | 34-37 | Proofs of Maintenance, Maintenance Plan 318 / 418, Models 308 63 / 311 66, Maintenance Plan Model 311 00 |
| 308S0100 | 38-39 | Perkins Engine (Safety, Safety Instructions, Specifications 704-30, Tightening Torques, Standard Torque Tensions for Screws and Nuts, Special Torque Tensions, Crankcase Breather, To Remove and to Fit, Valve Cover, Rocker-Arm Shaft, Rocker Shaft, To Dismantle and to Assemble, To Inspect, Cylinder Head, Valves and Valve Springs, Valve Tip Clearances, To Check and to Adjust, Fuel System, Remove Atomiser, Zexel Pfr Cassette-Type Fuel Injection Pump, To Bleed the Fuel System, Glow Plugs, Troubleshooting, Problems and Possible Causes, Possible Causes) |
| 308S0110 | 40-61 | Perkins Engine (Safety, Safety Instructions, Specifications 704-30, Tightening Torques, Standard Torque Tensions for Screws and Nuts, Special Torque Tensions, Torque Tensions Table, Crankcase Breather, To Remove and to Fit, Figure a, Figure B, Valve Cover, Rocker-Arm Shaft, To Remove, To Fit, Rocker Shaft, To Dismantle and to Assemble, To Dismantle, To Assemble, To Inspect, Cylinder Head) |
| 308S2200 | 62-63 | Hydrostatic Drive (Hydraulic Pump, Variable Displacement Motor, Hydraulic Oil Circuit – Drive, Adjustment Work, Boost Pressure, Towing, Admission of Oil to Valves, High Pressure, Zero Position, Purge Valve, Start of Control, Service and Checking Instructions, Troubleshooting with Forward-Reverse Control 318 ➜❙ 308 63 0366, 418 ➜❙ 311 66 0116, Troubleshooting with Tip Switch 318 ❙➜ 308 63 0367, 418 ❙➜ 311 66 0117, 418 Telescopic ❙➜ 311 00 0001, Inspection Report 318 Model 308 63, Inspection Report 418 Model 311 66, Hydraulics Diagram – Drive, Drive Curves 318 / 418, Drive Curves 318 / 418 – Power, Drive Curves 318 / 418 – Eco) |
| 308S2210 | 64-79 | Hydrostatic Drive (Hydraulic Pump, Proportional Valve Forward – Reverse, Micro Port Hp Valves, Bar Switch, Orifice, Pressure Switch 10 Bar, Zero Position, Suction Line, Case Flushing, Boost Pressure, Boost Pump, Hp Valve – Reverse, With Bypass, Hp Valve – Forward, Boost Pressure Valve, Proportional Valve, Variable Displacement Motor, Qmax Wide/Narrow Angle, Identification of Driving Direction, Scouring Slide, Start of Control, Setting for Start of Control, Purge Valve, Hp Connections – Forward, Hp Connections – Reverse, Hydraulic Oil Circuit – Drive, From Tank to Pump Connection S, High-Pressure Line From Pump Connection a to Motor Connection a, High-Pressure Line, From Pump Connection B to Motor Connection B, Leak-Oil Line, From Hydraulic Motor Connection to Temperature Controller Connection, Connection on Temperature Controller to Pump Connection, Short Bypass Line, From Temperature Controller to Hydraulic Oil Tank, Reflux Line, From Temperature Controller to Radiator Inlet, From Radiator Outlet to Reflux Suction Filter on the Hydraulic Oil Tank, Temperature Switch 100 °C, Pressure Switch 2 Bar, Temperature Controller 55 °C, Bypass, Adjustment Work, Micro Port for Boost Pressure, Towing, Admission of Oil to Valves, Pressure Switch in the Servo Piston, Proportional Valve – Forward, Proportional Valve – Reverse, Valve for Identification of Driving Direction, Qmax Valve, Controlled by Pressure Switch with a Set Pressure of 10 Bar, High Pressure, Micro Port Hp Forward, Micro Port Hp Reverse, Screw for Zero Position, Scouring Slide Valve, Micro Port – Boost Pressure, Mini Port for Control Start, Adjustment Screw for Control Start) |
| 308S2220 | 80-86 | Nfpe System, Connection Diagram 318/418, Table of Errors |
| 308S2230 | 87-100 | Explanation of the Susmic-Dia 1, Procedures, Activation of the Susmic-Dia 1, Sensor Setup Procedure, Sensor Error Procedure, Sensor Check Procedure |
| 308S2300 | 101-102 | View – Front Axle, View – Rear Axle, Axle Body and Planetary Drive on Front and Rear Axle, Planetary Drive – Front and Rear Axle, Self-Locking Differential – Front and Rear Axle |
| 308S2310 | 103-109 | Axles (View – Front Axle, Final Drive, Steering Ram, Parking Brake, Oil Filler Plug, Oil Drain Plug, View – Rear Axle, Transfer Gearbox, Axle Body and Planetary Drive on Front and Rear Axle, Upper Bearing Pin, Threaded Holes for Pull-Off Screws, Spacers, Sealing Ring, Lower Bearing Pin, O-Ring Seal, Joint Housing, Rotary Shaft Lip Seal in the Axle Tube, Rotary Shaft Lip Seal in the Joint Housing, Disassembling the Planetary Drive with Double Cardan Shaft on Front and Rear Axle, Disassembling the Rotary Shaft Lip Seal in the Joint Housing, Disassembling the Rotary Shaft Lip Seal in the Axle Tube, Planetary Drive – Front and Rear Axle, Wheel Hub, Internal-Geared Wheel, Sun Gear, Planet Carrier, Disassembling the Sealing Ring in the Wheel Hub – Front and Rear Axle, Self-Locking Differential – Front and Rear Axle, Self-Locking Differential with 45 % Locking Effect in Front and Rear, View – Oscillating Bearing, Oscillating Pin to Be Removed to the Front, Transfer Gearbox – Rear Axle, Circlip on Flanged Shaft, Flange to Axle, Flange Facing for Hydraulic Motor, Protective Ring, Rotary Shaft Lip Seal, Tubular Flange Shaft, Cap, Disassembly and Assembly of Transfer Gearbox) |
| 308S2400 | 110-111 | Service and Parking Brake, Brake Circuit – Service Brake, View – Parking Brake |
| 308S2410 | 112-115 | Brakes (Service and Parking Brake, Brake Caliper for Parking Brake Actuated Via Bowden Cable, Service Brake with Brake Fluid, Mounting Bore for Brake Caliper, Brake Circuit – Service Brake, Inching Potentiometer Version a, Brake-Fluid Tank, Master Brake Cylinder, Inching Potentiometer, Inching Potentiometer Version B, View – Parking Brake, Parking Brake Lever, Parking Brake Adjustment, Pressure Switch for Interruption of the Drive) |
| 308S2700 | 116-117 | Steering (Circuit for 318 / 418 / 418 Telescopic Model: 308 63 / 311 66 / 311 00, Diagram for 318 / 418 Model: 308 63 / 311 66, Rams on Front/Rear Axles for 318 / 418 Model: 308 63 / 311 66, Sevostat 318 / 418 / 418 Telescopic Model: 308 63 / 311 66 / 311 00, Wheel Synchronization 318 / 418 / 418 Telescopic Model: 308 63 / 311 66 / 311 00, System of Wheel Loaders 318, 418 and 418 Telescopic, How to Check/Adjust |
| 308S2710 | 118-128 | Steering (Circuit for 318 / 418 / 418 Telescopic Model: 308 63 / 311 66 / 311 00, Suction Line From the Tank, Pressure Line Pump – Priority Valve, Priority Valve to Steering Ram on the Rear Axle, Priority Valve to Steering Ram on the Front Axle, Ram on the Front Axle to Steering Ram on the Rear Axle, Pressure Line From Priority Valve to Control Unit, Reflux Line From Priority Valve to Tank |
| 308S3300 | 129-130 | Electrical System (Control Valve Actuation 318 / 418, Drive Switch Wiring, Wiring of Drive Direction Tip Switch, Fuse Box 318 / 418, Relay, Multifunctional Lever, Control Panel, Electrical Diagrams, Electrical Diagram 318 / 418 / 418 Telescopic Model: 308 63 / 311 66 / 311 00, Additional Electrical Diagram 418 Telescopic Model: 311 00, Front Wiring Harness 0 16 330 04 10 for 318 / 418 Models: 3085 63 / 311 66, Wiring Harness 0 16 330 02 10 for 318 / 418 Models: 308 63 / 311 66, Wiring Harness 0 16 330 03 10 Für 318 / 418 Models: 3085 63 / 311 66, Main Wiring Harness 0 16 330 01 10 Für 318 / 418 Models: 308 63 / 311 66) |
| 308S3310 | 131-138 | Electrical System (Control Valve Actuation 318 / 418, Forward-Reverse Control, Control Lever Lift/Lower, Actuation Lever 3rd Control Circuit with Detent, Forwards Tip Switch, Reverse Tip Switch, Drive Switch Wiring, Central Electrics/Feed Line, Solenoid Valve, Central Electrics/SUSMIC, Rocker Switch, Miniature Pir, White/Black, Brown/White, White/Green 5, Wiring of Drive Direction Tip Switch, Tip Switch and Green Symbol, Tip Switch and Yellow Symbol, Selection of Driving Direction, Integrated Electronics, Fuse Box 318 / 418, Spare Fuse, Relay, Driving Direction, Position of Relay on the Right Side of the Cab, Near the Control Valve, Relays K1 and K6 Are Located in the Engine Compartment, High Beam, Low Beam, Hazard Warning Light, Maintenance Relay, Drive Interlock, Position for Optional Implements, Multifunctional Lever, Turn Indicators, Washer Pump, Control Panel, Electrical Diagrams) |
| 308S3320 | 139-147 | Electrical System (Electrical Diagram 318 / 418 / 418 Telescopic Model: 308 63 / 311 66 / 311 00, Fuse Sizes, Electrical Diagram Model 308 63 / 311 66 / 311 00 – Standard Equipment, Additional Electrical Diagram 418 Telescopic Model: 311 00, Additional Electrical Diagram Model 311 00, Front Wiring Harness 0 16 330 04 10 for 318 / 418 Models: 3085 63 / 311 66, 4th Control Circuit, Heating, Front Lights, Front Wiper, Horn, Lighting Front, Washer Pump, Steering-Column Control Lever, Control and Indicator Panel, Black Plug: No 1 – 27, White Plug: No 28 – 54, Wiring Harness 0 16 330 03 10 Für 318 / 418 Models: 3085 63 / 311 66, Central Electrics, Hydraulic Motor, Identification of Driving Direction, Vg Max Gear Shift, Fuel Level Indicator, Temperature Sensor, Pressure Switch Hydraulic Oil Filter, Alternator, Temperature Switch, Glow Plugs, Air Filter, Oil Pressure Switch Engine, Starting Motor, Pressure Switch Reverse, Pressure Switch Forward, Starter, Preheating, Battery, Cutoff Solenoid, Wiring Harness – White Plug, Wiring Harness 0 165 330 03 10 318 / 418, Main Wiring Harness 0 16 330 01 10 Für 318 / 418 Models: 308 63 / 311 66, Assignment Table, Diagnostic Unit, Inching Potentiometer, Engine Speed Transmitter, Control Lever, Switch, Main Wiring Harness 0 16 330 01 10 318 / 418) |
| 308S3600 | 148-149 | Hydraulic System (Hydraulic Circuit 318 / 418 Model: 308 63 / 311 66, Circuit – Lift Ram, Circuit– Tilt Ram, Hydraulics Diagram 318 / 418 ➜❙ 308 63 0688/311 66 0337, Standard Equipment, Hose Burst Valve, Control Valve 318 / 418 ➜❙ 308 63 688/311 66 0337, Control Unit 318 / 418, Control Valve 318 / 418 with External Anticavitation ❙➜ 308 63 0689/311 66 0338, Hydraulics Diagram for 318 Model: ❙➜ 308 63 0689, Hydraulics Diagram for 418 Model: ❙➜ 311 66 0338, Lift Ram 318, Lift Ram 418, Tilt Ram 318, Tilt Ram 418, Quickhitch Facility with Ram 318 / 418, Locking Ram 318 / 418 / 418 Telescopic Model: 308 63 / 311 66 / 311 00, Hydraulic Circuit 418 Telescopic Model: 311 00, Circuit – Tilt and Compensating Ram, Circuit – Push-Out Cylinder, Control Unit for 418 Telescopic Model: 311 00, Hydraulics Diagram for 418 Telescopic Model: 311 00) |
| 308S3610 | 150-159 | Hydraulic System (Hydraulic Circuit 318 / 418 Model: 308 63 / 311 66, Circuit – Lift Ram, Lift Ram, B2 to Lift Ram, A2 to Lift Ram, Circuit– Tilt Ram, Tilt Ram, A1 to Tilt Ram, B1 to Tilt Ram, Hydraulics Diagram 318 / 418 ➜❙ 308 63 0688/311 66 0337, Standard Equipment, Pressure Line From Priority Valve, Combined Suction and Reflux Filter, Reflux Line, Hose Burst Valve, Control Valve) |
| 308S3620 | 160-161 | Hydraulic System (Hydraulics Diagram: for 318 Model: 36 ❙➜ 308 63 0689, Model 308 63 – Standard Equipment Valid From Serial No 308 63 0689, For 418 Model: ❙➜ 311 66 0338, Model 311 66 – Standard Equipment Valid From Serial No 311 66 0338) |
| 308S3630 | 162-171 | Hydraulic System (Lift Ram 318, Threaded Pin 20 - 25 Nm, Guide Bushing with Thread 350 - 400 Nm, Piston Screwed on 1350 - 1400 Nm, Seals Guide Bushing, Seals Piston, Removing the Lift Ram, Lift Ram 418, Guide Bushing with Thread 420 - 470 Nm, Tilt Ram 318, Seal, - 400 Nm, Removing the Tilt Ram, Tilt Ram 418, - 450 Nm, Quickhitch Facility with Ram 318 / 418, Limit Stops, Welded Into the Pipe, Locking Ram 318 / 418 / 418 Telescopic Model: 308 63 / 311 66 / 311 00, Piston Seal, Rod Seal, Thread M 8, Circlip, Guide Bushing, Seal Between Ram Cylinder and Guide Bushing, Limit Stop, Sealing the Quickhitch Ram, Hydraulic Circuit 418 Telescopic Model: 311 00, Circuit – Lift Ram, Section 2: Lifting and Lowering, Lower to Lift Ram, Lift to Lift Ram, Lift Ram B2 A2, Circuit – Tilt and Compensating Ram, Section 1: Tilting in / Dumping Out, Compensating and Tilt Ram Are Interconnected, Tilt in to Tilt Ram, Dump Out to Tilt Ram, Compensating Ram, Tilt Ram A1, Tilt Ram B1, Circuit – Push-Out Cylinder, Section 4 Push-Out Ram, Pilot Valve) |
| 308S3640 | 172 | Priority Valve, Suction and Reflux Filter, Control Valve, Hydraulic Oil Tank, Pressure Switch, Temperature Switch |
| 308S4100 | 173-174 | Heater Nozzle, Filter, Control Slide, Reflux Line, Feed Line, Front Window Connection |
| 308S4110 | 175 | - |
| 308Sba00 | 176-177 | Multifunctional Lever, Rotary Switch, Telltale (Alternator Charge Function), Hour Meter, Fuse Box, Rocker Switch (Hazard Warning System) |
| 308Sba10 | 178-198 | Brake Inching Pedal, Hydrostatic Steering, Accelerator Pedal, Control Panel, Parking Brake, Drive Mode Selection Switch |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| General tightening torque M4 (8.8) | 3 Nm | p. 13 |
| General tightening torque M4 (10.9) | 4 Nm | p. 13 |
| Engine Displacement | 2955 cm³ | p. 6 |
| Hydraulic Oil Tank Capacity | 50 l | p. 8 |
| Wheel Nut Tightening Torque | 420 Nm | p. 13 |
| Sound Power Level | 97 dB (A) | p. 11 |
| Cylinder-head bolt Tightening Torque | 13 Nm | p. 43 |
| 318 (model 308 63) | ||
| Engine Power | 37 kW at 2300 min⁻¹ | p. 6 |
| 418 (model 311 66), 418 Telescopic (model 311 00) | ||
| Engine Power | 44 kW at 2300 min⁻¹ | p. 6 |
| 318 (308 63) | ||
| Kerb Weight | 3800 kg | p. 11 |
| 418 (311 66) | ||
| Kerb Weight | 4300 kg | p. 11 |
| 418 Telescopic (model 311 00) | ||
| Kerb Weight | 4950 kg | p. 18 |
Mustang ML42 & variants Common Problems This Manual Covers
Mustang ML42 hydrostatic drive feels weak in forward gear and the machine barely climbs inclines p. 64
Inspect the proportional valves and high-pressure lines on page 64. Confirm the temperature controller opens at 55 °C, then read the boost pressure. Any weeping M10x1.0 sealing washers should be swapped out, and the new fittings torqued to 7 Nm.
Manual Section: Hydrostatic DriveService brakes stick after the pedal lifts and leave the wheel hubs running excessively hot p. 112
Check the master brake cylinder and inching potentiometer on page 112 for proper return clearance. Look over the parking brake caliper and Bowden cable for binding, drain the fluid, and swap any sticking seals. On reassembly, torque all wheel nuts to 420 Nm.
Manual Section: BrakesPerkins engine cranks but will not start, or idles rough with heavy exhaust smoke p. 60
Walk through the troubleshooting chart on page 60 for fuel delivery faults. Bleed the Zexel PFR injection pump to clear trapped air. If you check compression, confirm the cylinder-head bolts sit at 13 Nm. Refit the oil drain plug at 34 Nm.
Manual Section: Perkins engine troubleshooting: Problems and possible causesHydraulic oil level drops rapidly with no visible leaks around the lift or tilt rams p. 8
Pull the combined suction and reflux filter on the hydraulic tank and check for internal bypass. Drain the system fully and look for heavy contamination. Refill to the full 50 l capacity listed on page 8. Confirm the hose burst valve holds under load.
Manual Section: Hydraulic SystemFrequently Asked Questions
What do the error codes mean on a Mustang 318?
The SUSMIC-DIA 1 error table provides meanings for various GPI error numbers. For example, GPI Error no. 1 indicates "Sensor voltage beyond the valid range" with a Type of error 4 and LED error code – • • •. GPI Error no. 3 for the inching brake pedal sensor can mean "No setup performed" (Type of error 7), "Value too small" (Type of error 5), or "Value too high" (Type of error 6).
What is the torque spec for Mustang 418 wheel bolts?
Wheel nuts on the Mustang 318/418 and the 418 Telescopic all torque to 420 Nm. You'll find this figure under the "Specific tightening torques" section, which lists both wheel loader types.
What are the replacement specifications for seals?
Replacement seals and sealing rings come listed as part of the service kits. The planetary-drive sealing ring, for instance, specs at A 20 x 26, while the differential/gearbox ring is A 24 x 32. Both appear with part numbers and quantities under "Service and sealing kits," and oil filler and drain plugs need new sealing rings.
How quickly can I access this Mustang ML42 & variants manual after buying?
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Are electrical wiring diagrams included in this Mustang ML42 & variants manual?
Yes. Full electrical schematics are included, with wire colors, connector locations, and circuit descriptions.
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