88
Head Gasket
A head gasket, depicted in Figure 7.21, is installed between
the pump head and the spacer plate. Replace the gasket each
time the pump is reassembled.
Engine Adapter Gasket
On models so equipped, replace the engine adapter gasket,
seen in Figure 7.22, whenever the engine adapter has been
removed.
Later model pumps use a flange o-ring and bolt head o-ring
seals instead of the engine adapter gasket.
Engine Adapter, Pump Crankcase, Spacer Plate and
Head
Clean all parts. Inspect carefully for cracks, damage, and so
forth. Check for corrosion. Replace any damaged, defective,
or corroded part as necessary.
Axial Cam Drive Components
Units with Tapered Engine Shaft:
If so equipped, carefully inspect the engine adapter sleeve
(seen later in Figure 7.28). Replace if worn or damaged. The
engine adapter sleeve is retained to the engine adapter with
Permabond No. HM160 LOCTITE.
Referring to Figure 7.23, inspect the engine adapter bearing
and the axial cam bearing assemblies for wear, damage,
freedom of rotation, and evidence of overheating. Replace
any damaged or defective bearing assembly.
Check the axial cam for wear, damage, scoring, overheating,
grooving, etc. Replace if worn excessively or damaged.
Inspect the engine shaft adapter. Check for evidence of
scoring, wear, damage, overheating. Replace if necessary.
Section 7 • Large Frame Pump
Portable Pressure Washer Familiarization and Troubleshooting Guide
Item
Name
1
O-ring
2
Engine Adapter
3
Roller Thrust Bearing
4
Engine Shaft Adapter
5
Axial Cam
6
Bearing Assembly
Figure 7.23 - Axial Cam Drive Components (Units with
Tapered Engine Shaft)
Figure 7.22 — Engine Adapter Gasket
Figure 7.21 — Two Types of Head Gaskets
