Vibra On; Streaked Cleaning Pa"Ern; Spray Bar Swivel Leaking Water; Weeping / Dripping - Kärcher SCW 2.4/25 G Service Manual

6.3.6 Vibra$on
1. Inspect the pressure nozzles. See sec on 6.4.13. If the
nozzles are good con nue to #2.
2. Inspect spray bar. See sec on 6.5.9. If the spray bar is in
good condi on con nue to #3.
3. Inspect spray bar bolts and fi>ngs. See sec on 6.5.10. If
the spray bar bolts and fi>ngs are in good condi on con-
nue to #4
6.3.7 Streaked cleaning pa1ern
1. Inspect the pressure nozzles. See sec on 6.4.13. If the
nozzles are good con nue to #2.
2. Inspect spray bar rota on. See sec on 6.5.9. If the spray
bar rota on is good con nue to #3.
3. Inspect for pulsa on. See sec on 6.2. If machine does not
have a pulsa on issue con nue to #4
6.3.8

Spray bar swivel leaking water

6.3.8.1 "Weeping" / dripping
1. The swivel will weep underneath cover. Weeping is nor-
mal. The swivel uses water to help lubricate it's floa ng
seal.

6.3.8.2 Leaking

1. Inspect the plumbing fi>ngs going to and out of the spray
bar swivel. See sec on 6.5.8. If the plumbing fi>ngs are
good con nue to #2.
2. Rebuild or replace spray bar swivel. See sec on 6.5.13. If
leaking con nues con nue to #3.
6.3.9

Replacing leaking thermal relief valve

The thermal relief valve protects the pump from damaging
heat build-up while the unit is in bypass mode. Sensing a rise
in temperature, the valve opens and discharges a small
amount of heated fluid. This allows cooler water to enter the
system and cool the pump. When the unit starts cleaning
mode the cooler water entering the pump will cause the valve
to close immediately. If cold water is leaking out of the ther-
mal relief valve then it probably has failed from being opened
too many mes.
4. Inspect swivel. See sec on 6.5.8. If the swivel is good con-
nue to #5
5. Inspect for cavita on. See sec on 6.2. If cavita on is not
the issue con nue to #6
6. Call Technical support for further instruc on.
4. Inspect for low pressure. See sec on 6.2. If machine does
not have a low pressure issue con nue to #5
5. Inspect cleaning speed. See sec on 6.5.11. If cleaning
speed is good con nue to #6.
6. Call Technical support for further instruc on.
3. Call Technical support for further instruc on.
1. Replace thermal relief valve. See sec on 6.5.12. If the
thermal relief valve con nues to leak con nue to #2.
2. Call Technical support for further instruc on.
English 9.808-136.0 Rev. 00 (09/18)
19