Part 3 - Inspection; Seals, O-Rings, And Gaskets; Oil Seals; Inlet Check Valve Seals - Briggs & Stratton CE8070 Troubleshooting Manual

Portable Pressure Washer Familiarization and Troubleshooting Guide
Section 7 • Large Frame Pump

Part 3 - Inspection

Seals, O-Rings, and Gaskets

Replace seals and gaskets during the reassembly process.

Oil Seals

Each of the three (3) pump pistons pass through an oil seal
in the pump crankcase. The inset in Figure 7.18 shows that
the lip of the the spacer plate low-pressure oil seal points
into the opening.
Figure 7.18 — Oil Seals
Item Name
1 Spacer plate
2 Oil seal

Inlet Check Valve Seals

An inlet check valve is shown in Figure 7.19. The three (3)
inlet check valves are pressed into cylindrical openings
machined in the pump head, followed by an o-ring seal,
backup ring, and check valve seat support.
Figure 7.19 — Inlet Check Valve

Outlet Check Valve Seals

The three (3) outlet check valves are assembled into the
head with the components shown in Figure 7.20.
Figure 7.20 — Outlet Check Valve Parts
Item Name
1 High pressure seal
2 Bearing seal ring
3 Backup ring
4 O-ring
5 High pressure port tower
6 Check valve
7 Cylinder head
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