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)
SECTION 1 / LOW WATER PRESSURE
7
Problems That Cause Low Water Pressure
A. Water Supply
A problem with the water supply. Use cold water only.
B. Worn Nozzle
A worn nozzle on the spray gun.
C. Water Inlet Filter
A clogged water inlet filter (20).
D. Bypass Valve
Worn O-rings on the bypass valve (19), or a bypass valve hanging up.
E. High-Pressure Check Valve
High-pressure valve (43-46) fails to function properly.
F.
Low Pressure Check Valve
Low-pressure valve (24-27) fails to function properly.
G Water Leaks – See Section 2 / Water Leaks
Water leaks
H. Pump is Cycling – See Section 4 / Detergent Delivery Failure
Nozzle insert (32) is damaged and must be replaced.
Pump 629 9/28/01 3:22 PM Page 7
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For Karcher Pressure Washer Parts Call 606-678-9623 or 606-561-4983
