Portable Pressure Washer Familiarization and Troubleshooting Guide Section 4 • Small Frame Electric Pump
Auto Start Switch Assembly Refer to Figure 4.8 when following this disassembly procedure.
1. Remove the housing covering the auto switch (item 4) and disconnect two spade lugs from the switch. 2. Remove two (2) 5.5mm Taptite screws (item 3) using a 5.5mm socket. Remove the switch housing (item 4) from the piston housing.
Figure 4.8 — Auto Start Switch Group
3. Remove the retainer cap (item 11) with a 22mm socket or box wrench. Be careful to not round the hex head corners on this plastic part.
NOTE: The retainer cap, spring, and piston parts may show some slight differences depending on production date. Newer parts are completely interchangeable with older models. 4. Remove the piston spring and the piston components, as follows: a. To non-destructively remove the components, grasp the end of the piston shaft with a soft-jaw locking pliers and lever the assembly out of its port, prying against the port rim. b. If no soft-jaw pliers are available, a short length of brass tubing can be slipped over the piston shaft. A standard locking jaw plier can be used to grasp the tubing and squeeze it against the shaft, then remove as described in (a.). Item
Name
1
Piston housing
2
Rubber diaphragm
3
Taptite screw
4
Auto switch housing
5
Auto switch
6
Auto switch piston spring
7
Auto switch piston assembly
8
O-ring
9
Auto switch piston return stop
10
Backup ring
11
Retainer cap
12
O-ring
13
Backup ring
Any other removal method will require replacement of all auto switch piston components.
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