Required tools
● Face spanner,
pin diameter 3 mm
, article number: PV D40 012
● Open-end wrench,
WAF 13
● Calibrated torque wrench (tightening factor ≤ 2.5)
9.3.1 Removing the non-return valve
1
2 3
4
5
Fig. 19:
Removing valve
1 Spiral housing
4
Compression spring
2 O-ring
5
Valve guide
3 Valve plate
Removing valve
1. Use the face spanner to unscrew the valve guide with compression spring and valve plate from
the spiral housing.
2. Remove the O-ring from the hole in the spiral housing.
3. Unscrew the valve plate from the compression spring.
4. Clean the valve seat and the valve guide.
5. Replace all wear parts according to the spare part package.
9.3.2 Installing the non-return valve
1
2
3
4
5
Fig. 20:
Installing valve
1 Spiral housing
4
Compression spring
2 O-ring
5
Valve guide
3 Valve plate
Installing valve
1. Insert the O-ring into the designated groove in the spiral housing.
2. Turn the compression spring on the valve plate to open it.
– The valve guide centers and fixes the compression spring.
3. Place the valve plate on the valve guide.
4. Insert the valve into the spiral housing.
Maintenance
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Summary of Contents for HISCROLL 12
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