Oil Pump: Assembly

Caution during reassembly
1. When removing O-rings, oil seals and snap rings, always replace with new parts.
2. Thoroughly wash the parts and allow to dry. Make sure the parts do not come into contact with cleaning oil or dust.
3. The reassembly must be performed in a clean place. Make sure lint or other foreign objects do not stick to parts.
4. Cleaning oil tends to remain inside the front casing. Use compressed air to completely clean out any remaining cleaning oil.
5. Make sure the parts are not rusted. Once the parts are washed and dried, use a specified hydraulic oil to prevent rust.
6. Reassemble in the reverse order of removal.
At the bearing positions, apply grease to the oil seal and front casing inner surfaces.
CAUTION: Make sure the inner surface of the front body is not damaged.
Temporarily tighten the rear cover to the front body.
Attach ST to the front body. Using the press, install the oil seal.
ST 34199AE030 INSTALLER

Fig 1: Installing Oil Seal Using ST 34199Ae030 Installer
Courtesy of SUBARU OF AMERICA, INC.
Install the pump pulley to front body.
Using the ST, place the oil pump in a vise.
ST 34199AE020 MOUNT
Remove the rear cover.
Using a 10 mm box wrench, tap the retaining ring into the shaft groove.

Fig 2: Tapping Retaining Ring Into Shaft Groove
Courtesy of SUBARU OF AMERICA, INC.
Install the pressure plate as shown in the figure.

Fig 3: Installing Pressure Plate
Courtesy of SUBARU OF AMERICA, INC.
Apply the specified hydraulic oil to the O-rings, and attach to the front casing and pressure plate.
Install the seal ring to the pressure plate.
With knock pin positions aligned, install the rear cover.
Tightening torque:

27.5 N.m (2.8 kgf-m, 20.3 ft-lb)

CAUTION: Temporarily tighten the bolts in the order of (A), (B), (C), (D) as shown in the figure. Then, tighten in the same sequence.

Fig 4: Identifying Bolts In Tighten Sequence
Courtesy of SUBARU OF AMERICA, INC.
When reassembly is complete, turn the shaft by hand to make sure that rotation is smooth. If it is excessively tight or there is a clear problem, detach and check for foreign objects on the slide surface, or whether there is any problems in the attachment, and remove the cause of the problem.