25
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.
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.).
Any other removal method will require replacement of all
auto switch piston components.
Section 4 • Small Frame Electric Pump
Portable Pressure Washer Familiarization and Troubleshooting Guide
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
Figure 4.8 — Auto Start Switch Group
