8-28 SHB 28Z3 EN – Edition 2.0 * 28z3s810.fm
PowerTilt PTS06
Testing the internal decompression valve
Notice!
The internal decompression valve releases hydraulic oil at 210 – 230 bar (3046 –
3336 psi) around the internal piston tube body of the PowerTilt swivel device.
☞ Connect a 350 bar (5076 psi) pressure gauge to the hydraulic line to P1. Create
pressure until the shaft reaches the bottom dead centre externally, i. e. until the shaft
bracket or the base block on the drive-shaft side touches the housing or the bracket.
☞ Remove the hydraulic hose from port P2 and close it (port side to excavator).
☞ Connect the other hydraulic hose to P2 temporarily and place the open end of the hose
in a container.
Notice!
The internal decompression valve is set at the factory and cannot be adjusted.
☞ Slowly create the pressure at P1. Check the pressure value at which oil escapes at P2.
Oil escapes at 210 – 230 bar (3046 – 3336 psi).
☞ Check P2 in the same way.
☞ Replace the valve if the test pressure does not correspond to the specifications.
Fig. 79: Hydraulic connections PTS06
P1
P2
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