GSIC - Global Service Information Center

# VANE PUMP (for TR Series Engine) > INSPECTION

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1. INSPECT VANE PUMP SHAFT AND BUSHING IN FRONT HOUSING

1. Using a micrometer and a caliper gauge, measure the fluid clearance.

   Maximum clearance:
     Less than 0.07 mm (0.0028 in.)
   If the bushing or shaft is damaged, replace the vane pump assembly. If the fluid clearance exceed the standard, replace the vane pump assembly.

2. INSPECT VANE PUMP ROTOR AND VANE PUMP PLATE

1. Using a micrometer, measure the height, thickness and length of the plate.

   Minimum:

     Item | Length
     Height | 7.6 mm (0.299 in.)
     Thickness | 1.405 mm (0.0553 in.)
     Length | 11.993 mm (0.4722 in.)

   If the result is less than the minimum, replace the vane pump assembly.

1. Using a feeler gauge, measure the clearance between the rotor groove and plate.

   Maximum clearance:
     0.025 mm (0.001 in.)
   If the clearance is greater than the maximum, replace the plate and/or rotor with one that has the same mark as the cam ring.

   Inscribed mark:
     1, 2, 3, 4 or None

   HINT:
     There are 5 vane plate lengths with the following rotor and cam ring marks:

   Standard length:

     Rotor and Cam Ring Mark | Vane Plate Part No. | Vane Plate Length
     None | 44345-06110 | 12.001 to 12.003 mm (0.47248 to 0.47256 in.)
     1 | 44345-06120 | 11.999 to 12.000 mm (0.47240 to 0.47244 in.)
     2 | 44345-06130 | 11.997 to 11.998 mm (0.47232 to 0.47236 in.)
     3 | 44345-06140 | 11.995 to 11.996 mm (0.47224 to 0.47228 in.)
     4 | 44345-06150 | 11.993 to 11.994 mm (0.47216 to 0.47220 in.)

3. INSPECT FLOW CONTROL VALVE

1. Coat the valve with power steering fluid and check that it falls smoothly into the valve hole by its own weight.

1. Close either hole A or B and apply 392 to 490 kPa (4 to 5 kgf*cm2, 57 to 71 psi) of compressed air into the opposite side. Confirm that air does not come out from hole C. If air leaks from hole C, replace the vane pump assembly.

4. INSPECT FLOW CONTROL VALVE COMPRESSION SPRING

1. Using a vernier caliper, measure the free length of the spring.

   Minimum free length:
     29.2 mm (1.150 in.)
   If the length is less than the minimum, replace the vane pump assembly.

5. INSPECT PRESSURE PORT UNION

1. If the union seat in the pressure port union is severely damaged, it may cause fluid leakage. If damaged, replace the vane pump assembly.