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4. Maintenance4.6 Pressure relief valve
The relief valve must not be disassembled whilst the pump is in operation. Always observe the safety precautions detailed at the
front of this manual.
Take extreme care when removing the springs as they may be compressed.
S1-5 Relief valve
Item Description Item Description
1 Rotorcase cover 14 Circlip
2 Hydraulic piston 15 Bush
3 O-ring, hydraulic piston 16 Valve guide
4 Valve pin 17 Valve pin
5 Shim 18 Spring
6 Backstop disc 19 Screw
7 O-ring, backstop disc 20 Valve spring guide
8 Bush 21 Spring adjuster
9 Screw, backstop disc 22 Washer
10 Valve shaft 23 Notched nut
11 O-ring, pneumatic piston 24 Valve housing
12 Pneumatic piston 25 Screw
13 O-ring, pneumatic piston 26 Screw, spring adjuster
