52
Confidential to Customer
4.21.1 Removing the Air End
Remove the air end.
(
see p. 43
“
4.17 Oil Pump motor and Airend
removal”
4.17.2 Airend removal
)
4.21.2 Pulling Out the Pinion Gear
Attach the pinion gear pull-out tool. When attaching
the tool, ensuring that the O-ring is not stuck. Then
increase the oil pressure slowly and gradually using a
high-pressure pump to check for oil leak.
4.21 Pinion Gear Replacement Procedure
Air End
Shaft Dia.
Max Oil Pressure
Required
1st-stage
φ
1.17 inch
( φ
29.8mm)
21750 psi
(150MPa)
2nd-stage
φ
0.976 inch
( φ
24.8mm)
20300 psi
(140MPa)
(1) O-Ring
(2) O-Ring
Shaft
Pinion Gear
Pull-Out Tool
To Pump
Pump connecting port
(PS1/4)
4.21.3 Shrink-Fitting the Pinion Gear
Shrink-fit the pinion gear. Be sure to fully insert the
component until it comes in contact with the stepped
section of the motor. The temperature of shrink fitting
must be approximately 392
℉
(200
℃
).
Recommended equipment : SKF Oil injector 226400 series
