Service Limit

Make a measurement as follows. If it exceeds the specified service limit, replace the parts with new ones.

IMPORTANT:

Fix the oil pump on a vise to make a measurement. At this time, hold the oil pump with least possible force between two wood pieces.
Do not set 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:

Radial play (Direction )

0.4 mm (0.016 in) or less

Fig 1: Measuring Pulley Shaft Radial Play (Direction)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Axial play (Direction )

0.9 mm (0.035 in) or less

Fig 2: Measuring Pulley Shaft Axial Play (Direction)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Ditch deflection of pulley

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.

Fig 3: Reading Value For One Surface Of V Ditch

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Resistance to rotation 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 and make a judgment.

Fig 4: Measuring Load During Rotation
Courtesy of SAAB-SCANIA OF AMERICA, INC.