Piston Housing Assembly; Pilot Spacer Installation - Briggs & Stratton CE8070 Troubleshooting Manual

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

Piston Housing Assembly

Refer to Figure 4.16 for this procedure.
Figure 4.16 — Pistons and Springs
Item Name
1 Piston spring retainer
2 Piston
3 Piston spring
4 Piston housing
5 Oil seal
1. Pre-lubricate the three (3) oil seals (item 5) with silicone
spray. Press the seals into the piston housing with their
flat side (the side with writing on it) facing the installer. If
you see the seal's internal spring, the seal has been
installed upside down.
2. Apply a small amount of 80W90 oil to the three (3)
pistons, then install the pistons, springs, and retainers into
the piston housing. The pistons are merely pushed into
place.
3. Invert the piston housing so that the pistons protrude
vertically from the housing. Place the piston housing on a
flat surface.

Pilot Spacer Installation

Refer to Figure 4.17 for this procedure.
1. Install the three (3) check valve o-rings (item 4). Use a
small amount of petroleum jelly to hold them in place.
Figure 4.17 — Piston Housing
Item Name
1 Piston housing
2 Piston
3 Pilot spacer
4 Check valve o-ring
5 Shuttle valve o-ring
2. Install the three (3) pilot spacers (item 3) over the
pistons, with large end inserted in piston housing.
3. Install the shuttle valve o-ring (item 5). Use a small
amount of petroleum jelly to hold it in place.
4. Carefully lift the pump head assembly, invert it, and align
the high pressure water seals with the pistons protruding
from the piston housing.
5. Verify that the o-rings remain in their proper position and
press the head down to the piston housing.
31