Part 3 - Inspection; Seals, O-Rings, And Gaskets; Piston & Spring Assemblies; Pump Head And Piston Housing - Briggs & Stratton CE8070 Troubleshooting Manual

Portable Pressure Washer Familiarization and Troubleshooting Guide
Section 4 • Small Frame Electric Pump

Part 3 - Inspection

Seals, O-Rings, and Gaskets

Once the pump is disassembled, make a careful inspection of
all seals and o-rings for any defects that may affect the
proper operation of the pressure washer.
Piston & Spring Assemblies
Referring to Figure 4.10, inspect the three (3) pistons
carefully. Reject any piston that is scratched, dented, or
otherwise damaged.
Figure 4.10 — Piston & Spring Assemblies
Item Name
1 Piston spring retainer
2 Piston
3 Piston return spring
WARNING:
Do not strike a piston with any
object or use a piston to strike any object.Do not
drop the piston. Dropping the piston will result in
damage.
Each of the three (3) pump pistons pass through an oil seal
in the piston and unloader housing. Note the oil seal and
pilot spacer illustrated in Figure 4.11. The oil seal lip will face
towards the piston spring and retainer to retain the pump
oil.
Figure 4.11 — Piston Seals
Item Name
1 Piston, spring, and retainer
2 Piston housing
3 Oil seal
4 Pilot spacer
5 High pressure water seal
Inspect the three (3) piston springs. Replace any spring that
is damaged or broken.

Pump Head and Piston Housing

Clean all parts. Inspect carefully for cracks, damage, wear,
etc.. Check for corrosion. Replace any damaged, defective,
or corroded part as necessary.
27