Inlet Check Valves; Outlet Check Valves; Unloader Spindle Assembly - Briggs & Stratton CE8070 Troubleshooting Manual

Portable Pressure Washer Familiarization and Troubleshooting Guide
Section 6 • Medium Frame Pump

Inlet Check Valves

The three (3) inlet check valves are removed from the pump
head with a standard 5/16"-18 bottoming tap.
1. As shown in Figure 6.10, gently turn the tap into the
check valve with your fingers, approximately three full
turns.
Figure 6.10 - Inlet Check Valve Removal
Item Name
1 Outlet port cap
2 Outlet port cap o-ring
3 Outlet check valve
4 O-ring
5 Pump head with tap threaded into inlet
check valve
2. When securely threaded, gently rock the check valve and
withdraw it from its cavity.
CAUTION:
Do not turn the tap in too far. An
engagement of 2 or 3 threads is sufficient.

Outlet Check Valves

Referring to Figure 6.10:
1. Remove the outlet port cap.
2. Grasp the end of an outlet check valve with a needle nose
plier and pull it out.
3. Use a 90° o-ring pick to remove the o-ring from the base
of the cavity.
4. Repeat steps 2 and 3 for the remaining outlet check
valves.

Unloader Spindle Assembly

Referring to Figure 6.11:
1. Unscrew and remove the unloader handle, turning it
counterclockwise.
Figure 6.11 - Unloader/Regulator and Chemical Inject Removal
Item Name
1 Setscrew, M6-1.0 x 8mm
2 Unloader handle
3 Unloader spindle assembly
4 Spring
5 Chemical injection fitting
6 Check ball
7 Trapped line pressure seat
8 Trapped line pressure spring
9 Chemical injection venturi
10 Trapped line pressure piston
11 Unloader ball
12 Ball seat assembly
13 Pump head
14 Unloader spring
15 Plastic cap
3. Carefully loosen and unscrew the unloader spindle
assembly with a 19mm deep socket or wrench.
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