10
Problems That Cause Water Leaks
A. Thermal Relief Valve
The thermal relief valve (17) protects the pump from hot water temperatures in bypass
mode. If the thermal relief valve is damaged or does not reset, there will be a continual
leak. Check thermal relief valve (17).
B. Weep Holes – High-Pressure Seals
Water leaking from the weep holes (12) can indicate a leak in the high-pressure seals.
Check seals (31) for damage.
SECTION 2 / WATER LEAKS
7...Swash plate ball bearing
6...Swash plate housing
4...Forward O-ring
2...Oil bath housing
37...O-ring
38...Ball bearing
39...Spring
9...Piston
42...High-pressure valve cap (3)
28..Oil seal (3)
29...Seal retaining ring (3)
30...Bushing (3)
47...High-pressure valve plate
49...Pump head bolt (4)
46...High-pressure valve seat (3)
43...High-pressure valve basket (3)
44...High-pressure valve spring (3)
45...High-pressure valve plate (3)
10...Piston spring
11...Piston housing
34...Water outlet
20...Water inlet
33...non-return check valve
32...Nozzle insert
21...Water
inlet filter
41...Detergent filter
with metering valve
8...Swash disk
36...Detergent
non-return check valve
40...Detergent tube
1...Pump shaft
35...Nipple
19...Bypass valve
18...Spring
17...Thermal relief valve
16...Thermal relief
valve housing
15...Screw (2)
14...Deflector cap
13...Fastening cap
22...Connection piece
23...Throttle
27...Low-pressure valve basket (3)
26...Low-pressure valve spring (3)
25...Low-pressure valve plate (3)
24...Low-pressure valve seat (3)
3...Swash plate shaft seal
5...Swash plate shaft ball bearing
12...Slot holes (3)
48...Pump head
31...High-pressure seal (3)
Pump 629 9/28/01 3:22 PM Page 10
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For Karcher Pressure Washer Parts Call 606-678-9623 or 606-561-4983
