45
Part 4 - Reassembly
NOTE:
Refer to the Torque Specifications provided
on the pump exploded view found at the beginning of
this section when reassembling this product.
Engine Adapter
1. Install the retainer washer (thinner one) on the axial
cam/radial ball bearing assembly.
2. Install the cage needle bearing (either side up).
3. Install the thrust washer (thicker one, either side up).
Unloader Assembly
Refer to Figure 5.13 for this assembly.
1. Install the new O-Ring on the unloader seat (if replacing).
2. Install the unloader seat with O-Ring (use a small amount
of petroleum jelly on O-Ring if necessary). Seat will press
itself into place when unloader piston, spring, and cap are
installed.
3. Install the new split-ring seal onto the unloader piston (if
replacing).
4. Install the unloader piston. It will seat itself inside of the
unloader seat.
5. Install the unloader spring.
6. Install the M25-1.0 unloader cap and O-Ring.
7. Tighten the unloader cap to the torque value specified in
the Torque Chart, found on Figure 5.2 (Exploded View) at
the beginning of this chapter.
Chemical Injection Assembly
Refer to Figure 5.14 for this assembly.
1. Install the check ball into the chemical injection nipple,
followed by the spring (with the small end of the spring
towards the ball).
2. Install the M10-1.0 chemical injection nipple into the
piston and unloader housing. Be careful to not drop the
ball and spring.
3. Tighten the chemical injection nipple to the torque value
specified in the Torque Chart, found on Figure 5.2
(Exploded View).
Section 5 • Small Frame Gas Pump
Portable Pressure Washer Familiarization and Troubleshooting Guide
Figure 5.14 - Chemical Injection System
Item Name
1
Chemical injection venturi
2
O-Ring
3
Barbed nipple
4
Check ball
5
Spring
6
Piston and unloader housing
Figure 5.13 - Unloader Assembly
Item
Name
1
Piston and unloader housing
2
O-Ring
3
Unloader seat
4
Unloader piston
5
Unloader cap
6
Unloader spring
7
Split-ring seals
