| Required Tools | ||
|---|---|---|
| Part Number | Part Description | Qty |
| 6C-7139 | Manifold | 1 |
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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
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Sudden movement or accidental starting of the machine can cause personal injury or death to persons on or near the machine. To prevent personal injury or death, perform the following: Park the machine on a smooth, level surface. Lower the work tool to the ground and engage the parking brake. Stop the engine and remove the key. Block the wheels and install the steering frame lock. |
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| NOTICE |
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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. |
Note: The lift circuit relief valve should be connected to a hydraulic test bench to be tested and adjusted correctly.
- Release the pressure from the hydraulic system.
Reference: Refer to Systems Operation, Testing and Adjusting, "System Pressure - Release" for the machine that is being serviced.
- Remove lift circuit relief valve (1) .
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| Illustration 1 | g00918073 |
Location of the lift circuit relief valve (1) Lift circuit relief valve | |
- Install lift circuit relief valve (1) in the 6C-7139 Manifold. Connect the manifold to a hydraulic test bench.
- The pressure setting for lift circuit relief valve (1) is 31025 ± 345 kPa (4500 ± 50 psi).
- If the pressure setting of lift circuit relief valve (1) is not correct, loosen locknut (3). Turn adjusting screw (2) clockwise to increase the pressure. Turn adjusting screw (2) counterclockwise to decrease the pressure.
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| Illustration 2 | g00918074 |
Lift circuit relief valve (2) Adjusting screw (3) Locknut | |
- When the pressure setting is correct, tighten locknut (3). Remove lift circuit relief valve (1) from the 6C-7139 Manifold .
- Install lift circuit relief valve (1) to the machine.