57
Axial Cam Drive Components
To disassemble medium frame units, refer to Figure 6.6 and
proceed as follows:
1. Remove the pump piston bearing assembly (item 5) as a
unit.
2. Remove the axial cam with pressed-in engine shaft
adapter, thrust washer and retainers (item 4).
3. Remove the engine adapter bearing assembly (item 3).
You may need to use a 90° o-ring pick to pull the bearing
race out of the engine adapter housing.
4. Remove the four (4) 5/16”-24 screws that retain the
engine adapter to the engine. The engine adapter can now
be removed.
5. On units so equipped, completely remove the engine
adapter gasket. If necessary, remove the pilot sleeve from
these older-style engine adapters. This sleeve is secured
into the housing with LockTite®.
Pistons and Piston Springs
Refer to Figure 6.7 for this disassembly. The three (3)
pistons along with their springs can be removed from the
pump crankcase by grasping the springs and pulling straight
out.
Section 6 • Medium Frame Pump
Portable Pressure Washer Familiarization and Troubleshooting Guide
Figure 6.6 - Axial Cam Drive Components
Figure 6.7 - Piston Assembly
Item
Name
1
O-ring
2
Engine adapter
3
Engine adapter bearing assembly
4
Axial cam assembly
5
Roller thrust bearing assembly
6
Button head cap screw
7
O-ring
Item
Name
1
Spring
2
Piston
