8...Swash plate ball bearings
6...Swash plate housing
4...Forward O-ring
2...Oil bath housing
37...Ball bearing
38...Spring
10...Piston (3)
41...High-pressure valve plug (3)
29
...
Bushing (3)
30...High pressure seal (3)
47...Pump head bolt (4)
44...High-pressure valve cap (3)
43...High-pressure valve spring (3)
42...High-pressure valve cage (3)
11...Piston spring
12...Piston housing
33...Water outlet
21...Water inlet
31...non-return check valve
31...Nozzle insert
22...Water
inlet filter
40...Detergent filter with
metering valve
9...Swash disk
1...Pump shaft
35...Nipple
20...Bypass valve
19...Spring
18...Thermal relief valve
17...Thermal relief
valve housing
16...Screw (2)
15...Deflector cap
14...Fastening cap
27...Low-pressure valve basket (3)
26...Low-pressure valve spring (3)
25...Low-pressure valve plate (3)
24...Low-pressure valve seat (3)
5...Pump shaft ball bearing
7...Nut
39...Detergent tube
34...Retainer clip
36...Detergent non-return
check valve
23...Connection piece (2)
13...Weep holes (3)
45...High-pressure valve seat (3)
46...Pump head
3...Pump shaft seal
28...Oil seal (3)
SECTION 1 / LOW WATER PRESSURE
7
Problems That Cause Low Water Pressure
A. Water Supply
A problem with the water supply.
B. Worn Nozzle
A worn nozzle on the spray gun.
C. Water Inlet Filter
A clogged water inlet filter (22).
D. Bypass Valve
Worn O-rings on the bypass valve (20), or a bypass valve hanging up.
E. High-Pressure Check Valve
High-pressure valve (41-44) 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
Non-return valve (35) is damaged and must be replaced.
Pump 777 9/28/01 3:55 PM Page 7
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For Karcher Pressure Washer Parts Call 606-678-9623 or 606-561-4983
