Whether your 4070 runs the Deutz or the Perkins engine, this Weidemann 4070 CX80, 4070 CX100 repair manual PDF settles it either way: 522 factory pages, OEM ID 1000245280, covering both wheel loader variants plus the telescopic arm option. Hydraulic schematics trace the driving, steering, and brake circuits, and the electrical circuit diagrams run into full plug and pin assignment tables, so a dead sensor hunt ends at a connector, not a guess. Troubleshooting charts work the engine, hydrostatic drive, and telescopic arm fault by fault. Set the pressure cut-off at 450 bar, then torque your wheel nuts to 285 Nm; both come straight off the spec tables. Chasing drive drift without setpoints eats an afternoon. Bookmarked and carrying a real text layer for keyword lookup, the file rides whatever screen you have next to the loader.
What's Inside This Weidemann 4070 CX80, 4070 CX100 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 21-44 | - |
| Technical Data, Testing Equipment and Special Tools | 45-80 | Technical Data, Filling Quantities, Tightening Torques, Pressure Values, Flow Rates, Safety Stickers |
| Inspections, Maintenance Work and Troubleshooting | 81-140 | Complete Vehicle (Inspection Log for Deutz Engine, Inspection Log for Perkins Engine, Telescopic Arm Inspection Log) |
| Complete Vehicle | 141-148 | Helpful Tips, Protective Stickers |
| Engine | 149-200 | Engine Removal, Engine Installation, Rubber Buffers, Clutch Pa Flange, Radiator, Air Filter System, Fuel System, Exhaust System |
| Hydraulic System | 201-266 | Depressurizing, Hydraulic Cylinder, Driving Hydraulics, Steering Hydraulics, Brake Hydraulics, Gear Pump, Control Valve, Diaphragm Accumulator |
| Drive and Axles | 267-282 | Drive Shaft, Front Axle, Rear Axle |
| Brake System (Mechanical Section) | 283-286 | Service Brake, Brake Shoes, Brake Drum, Parking Brake, Bowden Cable |
| Vehicle Frame and Load Arm | 287-340 | Front Carriage, Rear Carriage, Engine Hood, Center Joint, Insulation Mats, Load Arms, Telescopic Arm, Tool Attachment |
| Operator's Platform and Cab | 341-376 | Seat, Cab, Windows, Windshield, Doors, Steering Column, Heater, Air-Conditioning Unit |
| Electrical System | 377-410 | Generator, Battery, Starter, Wiper Motor, Heater Blower, Switches, Sensors, Relays |
| Attachments | 411-422 | Earth Bucket, Digging Tooth, Fork and Grab, Multi-Purpose Bucket |
| Circuit Diagrams and Descriptions | 423-426 | Circuit Diagrams, Troubleshooting, Fault Search |
| Hydraulic Circuit Diagram | 427-428 | Hydraulic Schematic, Hydraulic Components |
| Electrical Circuit Diagram | 429-456 | Electrical Schematic, Power Supply, Lighting, Control Unit |
| Plug Assignments / Contact Assignments | 457-480 | Plug Connectors, Pin Assignment, Socket Assignment, Wiring Harness |
| Technical Description and Supplier Documentation | 481-522 | Engine, Hydraulic System, Overload Measuring Device, Electrical Components |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Wheel nut torque | 285 Nm | p. 53 |
| Battery capacity (4070 CX80) | 77 Ah | p. 49 |
| Battery capacity (4070 CX100) | 100 Ah | p. 50 |
| Starting speed setpoint value | idling speed + 100 rpm | p. 103 |
| Pressure cut-off setpoint value | 450 bar | p. 104 |
| Steering pressure setpoint value | 190 bar | p. 111 |
| pedal play | 2 mm | p. 121 |
| Battery voltage at idling speed | 14 V | p. 131 |
| Battery voltage at idling speed with headlamps on | 13.8 V | p. 131 |
| Battery capacity | 74 Ah | p. 430 |
| Load-shedding relay lighting | 20 A | p. 430 |
| Glow plugs (Perkins) | 12 V 28 A | p. 430 |
Weidemann 4070 CX80, 4070 CX100 Common Problems This Manual Covers
Weidemann 4070 hydrostatic drive turns weak and jerky once hydraulic oil warms up, travel speed drops
Test supply pressure at the variable displacement pump; the setpoint on page 106 is 25 bar. Low readings usually mean a plugged suction filter starving the pump, so drain the 80.0 L hydraulic tank, replace the suction and return filters, and refill with clean oil. Retest at operating temperature, since hot thin oil shows the real pressure.
Manual Section: Hydraulic System Troubleshooting p. 106Loader barely moves under load, insufficient thrust pushing into the pile or climbing ramps
Measure high pressure in the driving hydraulics with the machine stalled against the brakes; the pressure cut-off setpoint is 450 bar on page 104. Verify the drive engages at idling speed plus 100 rpm as listed on page 103. If both check out, inspect the drive shaft and axles starting on page 267 for mechanical binding.
Manual Section: Drive and Axles Troubleshooting p. 104Engine cranks slowly, display flickers or goes dead, no start on cold mornings
Check battery voltage with the engine running at idle; you should see 14 V, rising to 14.4 V at maximum speed per page 131. Anything lower points to the generator or a bad ground, not the battery alone. Clean and tighten both terminals, then trace the power supply through the wiring diagram on page 429 before condemning the starter.
Manual Section: Electrical System p. 131Steering wheel turns hard at idle and gets worse with a full bucket
Test steering pressure at the test port; the setpoint is 190 bar on page 111. Pressure under spec means the gear pump or steering valve is bleeding off, so inspect both in the steering hydraulics coverage starting on page 201. Grease and check the articulation joint too, since a dry center pin mimics low steering pressure.
Manual Section: Hydraulic System p. 111Machine creeps when stopped, service brake pedal feels spongy and travels too far
Adjust the brake linkage so pedal play measures 2 mm as specified on page 121. If the pedal still sinks, pull the brake drum and inspect shoe lining wear using the mechanical brake procedures starting on page 283. Reset the parking brake Bowden cable afterward and torque the wheel nuts to 285 Nm before road testing.
Manual Section: Brake System (Mechanical Section) p. 283Frequently Asked Questions
What are the torque specifications for the wheel nuts on the Weidemann 4070 CX80?
The tightening torque for the wheel nuts on the Weidemann 4070 CX80 is 285 Nm. p. 53
What is the Deutz engine valve play specification on the Weidemann 4070 CX80, CX100?
For the Deutz engine, the valve play for the inlet is 0.3 ± 0.05 mm and for the outlet is 0.5 ± 0.05 mm. These measurements must be taken when the engine is cold and the oil temperature is below 80 °C. p. 89
What is the Deutz engine oil capacity on the Weidemann 4070 CX80, CX100?
The engine oil capacity for the Deutz engine, including the filter, is 10.5 liters. p. 51
What is the cylinder head cover tightening torque for the Deutz engine on the Weidemann 4070 CX80, CX100?
The tightening torque for the cylinder head cover on the Deutz engine is 8.5 Nm. p. 53
How is this Weidemann 4070 CX80 Repair Manual delivered?
One searchable PDF covering 522 pages, delivered instantly. No disc, no shipping, no waiting on the post.
Can I print this manual?
Yes. No DRM, nothing blocks printing, so run off the pages you need on whatever printer you have.
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