Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.
Refer to Special Publication, NENG2500, "AVSpare Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on AVSpare products.
Dispose of all fluids according to local regulations and mandates.
|Required Tools    |
|Part Number    ||Description    ||Qty    |
|4C-4890    ||Hydraulic Test Group    ||1    |
|8T-5320    ||Hydraulic Test Group    ||1    |
- Lower the bucket or any work tools to the ground. Stop the engine.
- Install the steering frame lock.
Steering Frame Lock
- Turn the steering wheel to the left and to the right in order to release any steering system pressure.
- Slowly loosen the hydraulic tank filler cap in order to release any residual pressure. Then, tighten the filler cap.
- Install a 0 to 6000 kPa (0 to 870 psi) pressure gauge at pressure tap (1) .
Cab has been removed for photographic clarity
- Start the engine and run the engine at high rpm.
- Center the machine in the straight ahead position.
- Note the reading on the pressure gauge. The standby pressure reading should be 4700 kPa (680 psi) maximum. The margin pressure is 2500 kPa (365 psi).
- Do not make adjustments to the steering/pilot pump in order to affect the standby pressure reading. Instead, if the pressure reading is too low or too high, the margin pressure test should be performed.
Reference: For the correct test procedure, refer to Testing and Adjusting, " Piston Pump (Steering) Margin Pressure - Test and Adjust".