K&T 3.532-757.0, Service Handbook

Page: 6 / 17

negative pressure, and no detergent can be drawn into the unit.
The detergent check valve consists of a small spring (31) with a ball,
O-ring and nipple. When operating in the detergent mode, the negative
pressure created by the nozzle insert causes the ball to be drawn
away from the O-ring, against the tension of the spring. Detergent can
then be drawn into the unit.
When operating in the high-pressure mode, the ball seals off the
detergent connection so that no water can flow into the container of
detergent.
6
KARCHER OVERVIEW
PART NUMBERS
High Pressure Washer Pump 3.532-785.0
ITEM #(S) DESCRIPTION PART # QTY. IN
PUMP
1 Oil reservoir cap 5.063-651.0 1
2 Oil filter 5.132-107.0 1
3 Oil reservoir 5.070-194.0 1
4 O-ring 6.362-168.0 1
5 Oil drain plug ring 7.362-003.0 1
6 Oil drain plug 7.382-085.0 1
7 Oil bath housing 5.093-207.0 1
8 Pump shaft seal 7.387-018.0 1
9 Forward o-ring 6.363-067.0 1
10 Swash plate assembly with 5.120-326.0 1
Cylinder bearing 7.401-027.0 1
Coupling element 4.120-192.0 1
Spring 7.318-002.0 1
11 Swash plate ball bearings 6.401-185.0 1
12 Swash plate 5.120-326.0 1
13 Piston 5.553-434.0 3
14 Piston spring 6.332-427.0 3
15 Piston housing 5.060-677.0 1
16 Pressure/volume control knob with 5.321-307.0 1
Spindle 4.401-079.0
17 Bypass valve (multiple numbers)
top o-ring set 6.362-454.0 1
piston 5.553-383.0 1
spring 5.332-425.0 1
valve seat 5.581-242.0 1
valve seat o-ring 6.362-169.0 1
threaded spindle 5.305-274.0 1
18 Bushing 5.110-630.0 1
19 High-pressure seal 6.365-432.0 3
20 Pump head 5.550-266.0 1
21 Water outlet 5.063-897.0 1
22 Non-return check valve 5.584-091.0 1
23 Nozzle insert 5.769-138.0 1
24, 25 Low-pressure check valve basket, 4.580-371.0 3
26, 27 spring, plate and seat
ITEM #(S) DESCRIPTION PART # QTY. IN
PUMP
28 Water inlet housing 5.063-897.0 1
29 Water inlet filter 6.414-252.0 1
30 Detergent check valve 5.443-448.0 1
31 O-ring 6.362-175.0 1
32 Ball-bearing 7.401-909.0 1
33 Spring 5.332-258.0 1
34 Detergent tube 6.388-216.0 1
35 Detergent filter 4.862-032.0 1
36 Retainer nut 5.411-150.0 1
37 Thermal relief valve 5.413-067.0 1
38 Low pressure oil seal 6.365-340.0 3
39 Seal retaining ring 5.115-465.0 3
40 Bushing seal 6.365-434.0 3
41 Bushing 5.112-576.0 3
42 Scraper ring 5.115-744.0 3
43 Piston guide retaining screw 7.303-047.0 2
44 High pressure valve slide 5.003-983.0 1
45,46 High-pressure valve cage, spring, 4.580-371.0 3
47,48 plate and seat
50 Pump head bolts 7.306-047.0 4
51 Spring 5.332-446.0 1
52 Ball-bearing seat 5.411-070.0 1
53 Ball-bearing 7.401-909.0 1
54 Safety relief valve 5.583-164.0 1
55 Water outlet bolt 7.306-105.0 4
NOT PICTURED IN DIAGRAM
Garden hose connection 9.154-009.0 1
Piston spring retaining clip 7.343-478.0 3
Pump 785 9/28/01 3:06 PM Page 6
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For Karcher Pressure Washer Parts Call 606-678-9623 or 606-561-4983