Service Limit

Make a measurements as follows. If it exceeds the service limit, replace with a new part.

CAUTION:

When securing the oil pump on a vise, hold the oil pump with the least possible force between two pieces of wood.
Do not set the outside of flow control valve or pulley on a vise; otherwise outside or pulley might be deformed. Select properly sized wood pieces.

Play of the pulley shaft
Condition:

P: When applying the force of 9.8 N (1.0 kgf, 2.2 lb)

Service limit:

Play in the radial direction (Direction ← → )

0.4 mm (0.016 in) or less

Fig 1: Checking Pulley Shaft Play (Play In Radial Direction)
Courtesy of SUBARU OF AMERICA, INC.

Axial play (Direction ← → )

0.9 mm (0.035 in) or less

Fig 2: Checking Pulley Shaft Play (Axial Play Direction)
Courtesy of SUBARU OF AMERICA, INC.
Deflection of the pulley groove
Service limit:

1.0 mm (0.039 in) or less

NOTE: Read the value for one surface of V ditch, and then the value for another off the dial gauge.

Fig 3: Checking Deflection Of Pulley Groove
Courtesy of SUBARU OF AMERICA, INC.
Rotating resistance of pulley
Service limit:

Maximum load: 9.22 N (0.94 kgf, 2.07 lb) or less
NOTE:
- A rather higher value may be indicated when pulley starts turning.
- Measure the load during rotation to make a judgment.
  
  Fig 4: Measuring Load During Rotation
  Courtesy of SUBARU OF AMERICA, INC.