Operation Maintenance Manual
Power Slip PS-500
PN 757000-D - Revision: 17 (up to SN 138212) 06-2018
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4.2.7
Hydraulic Adjustments
Valve
q
- Sequence Valve
Adjusts sequence of PS-500 and HCGS
(Guide Plate Extension).
¯
Enhance pressure - Guide Plates extend later.
°
Reduce pressure - Guide Plates extend earlier.
Valve
w
- Load-Holding Valve
Prevents setting of the Slip Assembly when pressure drops
.
¯
Enhance pressure (load to be hold).
°
Reduce pressure (load to be hold).
Valve
e
- Ball Valve
Turns off and on the HCGS. Use the Socket Wrench (P/N
77812) which is part of the Toolkit (P/N 775820). To
adjust the Ball Valve, raise the HCGS and guide the Socket
Wrench through the bore, which is located on top of the
Cover.
¯
Blocked volumetric flow.
°
Released volumetric flow.
Valve
r
- Throttle - Sequence
Adjusts sequence of PS-500 and HCGS
(Guide Plate Retraction).
¯
Enhance pressure - Guide Plates retract later.
°
Reduce pressure - Guide Plates retract earlier.
Fig. 95: PS-500 Valve Block
Fig. 96: PS-500 Ball Valve I
Fig. 97: PS-500 Ball Valve II
Fig. 98: PS-500 Distribution Block
q
w
e
r
e