7.6 Cleaning the overflow valve
1
2
3
4
5
7
6
9
8
Fig. 12:
Overflow valve
1 Allen head screws
6
Pressure screw
2 Valve cover
7
Compression piece
3 O-ring
8
Valve plate
4 Ball
9
Pump housing
5 Compression spring
Required tools
● Allen key, WAF 6 mm
● Calibrated torque wrench (tightening factor ≤ 2.5)
Remove the overflow valve
1. Unscrew the screws and remove the valve cover.
2. Be careful with O-ring.
3. Remove the valve plate from the overflow channel.
4. Unscrew and remove the pressure screw and at the same time remove the compression spring,
compression piece, and ball.
5. Clean and dry the guide pin from the valve cover.
6. Lightly rub the surface with emery cloth (grain size 180).
– Never oil the guide pins, this has an adverse effect on damping.
– If necessary, replace completely if there are pronounced traces of wear.
7. Clean the other parts.
8. Inspect all parts for wear and replace if necessary.
Install the overflow valve
1. Mount the ball, compression piece, and spring.
2. Lock the thread on the pressure screw with
Loctite 243
.
3. Screw in the pressure screw.
4. Locate the valve plate in the overflow channel.
5. Install the O-ring in the appropriate groove.
6. Place the valve cover on the housing.
7. Tighten the screws crosswise.
– Tightening torque:
25 Nm
7.7 Installing the coupling
WARNING
Danger of injury due to exposed rotating parts
In the operating range of the motor coupling, there is a danger of clothing being caught and wound
up.
► When assembling the motor and coupling, make sure that the coupling protection is seated cor-
rectly.
► Wear correct clothing.
Maintenance
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