Piston Housing Disassembly; Chemical Injection System - Briggs & Stratton CE8070 Troubleshooting Manual

Piston Housing Disassembly

Refer to Figure 4.6 for this disassembly, as follows:
Figure 4.6 — Piston Housing Disassembly
Item Name
1 Housing o-ring
2 Piston spring retainer
3 Piston
4 Piston spring
5 Piston housing
6 Oil seal
1. Remove the large o-ring (item 1) from the housing.
2. Remove the three (3) pistons, springs, and retainers. To
do this, grasp the piston springs and pull straight out. The
retainers will stay attached to the pistons.
3. Remove the three (3) piston oil seals (item 6).
Portable Pressure Washer Familiarization and Troubleshooting Guide

Chemical Injection System

Not all pumps are equipped with a chemical injection
system. Refer to Figure 4.7 when following this disassembly
procedure.
Be careful not to lose check ball and spring.
Figure 4.7 — Chemical Inject System
Item
1
2
3
4
5
6
1. Remove the chemical injection fitting, check ball, and
spring (items 3, 4, & 5).
2. Using a large straight tip screwdriver, unscrew and
remove the chemical injection venturi and o-ring (items 1
& 2) from discharge port.
It may be necessary to insert a sheet metal screw into the
venturi hole, then pull on the screw with a pliers, to
remove the venturi and o-ring.
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Section 4 • Small Frame Electric Pump
Name
Chemical inject venturi (brass or plastic)
Venturi o-ring
Chemical inject fitting
Check ball
Check spring
Piston housing