KAESER Premium Compact W 200/4, Service Manual

Page: 54 / 64

10.13 Maintenance of the pressure switch unloading valve
According to the pressure switch version, the relief valve can be cleaned or must be replaced.
The unloading valve must be cleaned in the following circumstances:
■ Machine starts with difficulty.
■ The machine does not vent after switching off.
Material Compressed air for blowing out
Cleaning cloths
Spares as required
Precondition The supply disconnecting device is switched off.
The disconnecting device is locked off.
A check has been made that no voltage is present.
The machine is fully vented (no pressure). Verify the absence of pressure using a suitable measur‐
ing device (pressure gauge).
The machine has cooled down.
Fig. 17 Maintenance of the pressure switch unloading valve
1a
The unloading valve can be cleaned.
1b
The unloading valve must be replaced.
2
Screw
3
Screw plug
4
Ball
5
Spring
6
Gasket
7
Pin
8
Screw fitting
Unloading valve (1a) can be cleaned Unloading valve (1b) must be replaced
Open the valve carefully.
1. Remove the fitting from the valve.
2. Loosen the securing screws and take off the
unloading valve.
3. Remove the screw plug and take out the in‐
dividual parts.
4. Extract the pin and clean it and the other
parts, blowing out if necessary.
5. After reassembly insert the unloading valve
and tighten down with the screw.
1. Remove the fitting from the valve.
2. Loosen the securing screws and take off the
unloading valve.
3. Insert the new unloading valve and fix with
the screw.
10 Maintenance
10.13 Maintenance of the pressure switch unloading valve
44
Service Manual Reciprocating compressor
Premium compact W
No.: 9_9418 20E