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4. Install the engine adapter bearing race, followed by the
engine adapter bearing and the inner cam bearing race.
Refer to Figure 7.30.
a. For ROLLER BEARINGS, the chamfered edge of the
bearing races must face AWAY FROM THE BEARING
ROLLERS. That is, the flat (unchamfered) side of the
race must ride against the rollers.
b. For BALL BEARINGS, the bearing races are grooved
to accept the bearing balls. MAKE SURE THE
BEARING BALLS ARE RIDING IN THE BEARING
RACE GROOVES.
5. Install the axial cam (with cam surface facing you) over
the engine shaft adapter. Push the cam toward the engine
until it seats against the engine adapter bearing race.
6. Again referring to Figure 7.30. install the outer cam
bearing race, axial cam bearing and piston shoe bearing
race.
a. For ROLLER BEARINGS, the chamfered edge of the
bearing races must face AWAY FROM THE BEARING
ROLLERS. That is, the flat (unchamfered) side of the
race must ride against the rollers.
The inside diameter of the outer cam bearing race is
larger than the piston shoe bearing race.
b. For BALL BEARINGS, the bearing races are grooved
to accept the bearing balls. MAKE SURE THE
BEARING BALLS ARE RIDING IN THE BEARING
RACE GROOVES.
7. Install the Belleville washer and the M16-1.50 jam nut
over the engine tapered shaft. Tighten the M16-1.50 jam
nut to the torque value specified in the Torque Chart,
found on Figure 7.2 (Exploded View) at the beginning of
this chapter.
Section 7 • Large Frame Pump
Portable Pressure Washer Familiarization and Troubleshooting Guide
Item
Name
1
Engine adapter bearing race
2
Engine adapter bearing
3
Inner cam bearing race
4
Axial cam assembly
5
Outer cam bearing race
6
Axial cam bearing
7
Piston shoe bearing race
A
Larger inside diameter
B
Smaller inside diameter
C
Chamfer faces this way
Note: Inset at lower left shows bearing race cross-section
and locations of chamfers
Figure 7.30 — Bearing Race Assembly
