High Pressure Outlet/Chemical Injection Assembly - Briggs & Stratton CE8070 Troubleshooting Manual

Portable Pressure Washer Familiarization and Troubleshooting Guide
Section 6 • Medium Frame Pump
Inspect the three (3) piston springs. Ends must be closed
and ground square. Check spring free length and load length
as follows, referring to Figure 6.19:
Figure 6.19 — Piston Return Spring
Item Name
1 Free length
2 Load length
1. Free length should be 62.57 mm (2.463").
2. Apply a force of 51.0 to 56.4 pounds (227.2 to 251.1
Newtons).
3. At the stated load, spring length should be 39.8 mm
(1.567").
4. Replace all three (3) springs as a set if any one spring is
damaged or broken. Replace the springs as a set if the
free length or load length of any one spring does not
meet specifications.

High Pressure Outlet/Chemical Injection Assembly

Referring to Figure 6.20, inspect the chemical injection and
unloader components for signs of damage, obstructions, or
wear. Replace any damaged or defective parts as necessary.
Figure 6.20 — High Pressure Outlet/Chemical Inject Assembly
Item Name
1 Setscrew, M6-1.0 x 8mm
2 Unloader handle
3 Unloader spindle assembly
4 Chemical injection spring
5 Chemical injection fitting
6 Check ball
7 Trapped line pressure seat
8 Spring
9 Venturi assembly
10 Trapped line pressure piston assembly
11 Unloader ball
12 Ball seat assembly
13 Head
14 Unloader spring
15 Plastic cap
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