Table of Contents
Advertisement
Portable Pressure Washer Familiarization and Troubleshooting Guide
Section 7 • Large Frame Pump
Inspect the jam nut and the Belleville washer for wear or
damage. Replace if necessary.
Units with Straight Engine Shaft:
Referring to Figure 7.24, carefully inspect the engine adapter
bearing and the axial cam bearing assemblies for wear,
damage, freedom of rotation, or evidence of overheating.
Replace any damaged or defective bearing assembly.
Figure 7.24 - Axial Cam Drive Components (Units with
Straight Engine Shaft)
Item
Name
1
Engine adapter
2
Roller thrust bearing assembly
3
C-ring cam retainer
4
Washer retainer
5
Thrust washer
6
Engine shaft adapter
7
Axial cam
8
Piston pivot bearing assembly
Check the engine shaft adapter assembly (items 3, 4, 5, and
6), which is a part of the axial cam. Since these parts require
factory assembly, they must be replaced as a set. The
adapter has a built-in key which mates with an engine shaft
keyway. Replace if worn or damaged.
Piston & Spring Assemblies
Referring to Figure 7.9 (seen earlier), inspect the three (3)
pistons carefully. Replace all three pistons and piston shoes
as a set if any one piston is scratched, dented, chipped, or
otherwise damaged.
CAUTION:
or use a piston to strike any object. Do not drop the
piston. Dropping the piston will result in damage.
Measure the piston diameter and the piston length (as
shown in Figure 7.25). If the values are not within the
tolerances specified below, replace all three pistons as a set:
Figure 7.25 — Piston Dimensions
Piston diameter: 14.977 mm to 14.985 mm
Piston length: 86.65 mm to 90.05 mm
Inspect the piston pivot shoes, depicted in Figure 7.26.
Replace pistons and shoes as a set, if damaged.
Figure 7.26 — Piston Pivot Shoe
89
Do not strike a piston with any object
Advertisement
Table of Contents
Troubleshooting
