Vane Pump (For Tr Series Engine) Inspection

Using a micrometer, measure the diameter (a) of the shaft with pulley.

Using a caliper gauge, measure the inside diameter (b) of the front vane pump housing.

NOTICE:

Do not damage the bushing in the front vane pump housing.

Subtract (a) from (b) to calculate the oil clearance.

Maximum clearance:

0.07 mm (0.00276 in.)

Using a feeler gauge, measure the clearance between the side face of the vane pump rotor groove and the vane pump plates.

Maximum clearance:

0.03 mm (0.00118 in.)

NOTICE:

1. If the clearance is more than the maximum, replace the vane pump plates, vane pump rotor and vane pump cam ring.
   
2. Refer to the following table to select an appropriate combination of vane pump rotor, vane pump cam ring and vane pump plates.
   
   

   Combination of Vane Pump Rotor, Vane Pump Cam Ring and Vane Pump Plates:

   
   

   Vane Pump Rotor Part No.	Vane Pump Cam Ring Part No.	Vane Pump Plate Part No.
   44313-06110	44325-06160	44345-06110
   44313-06120	44325-06170	44345-06120
   44313-06130	44325-06180	44345-06130
   44313-06140	44325-06190	44345-06140
   44313-06150	44325-06200	44345-06150

Check the flow control valve for leakage. Close one of the holes and apply compressed air at 392 to 490 kPa (4.00 to 4.99 kgf/cm², 56.9 to 71.0 psi) to the hole on the opposite side. Confirm that the air does not flow out of the end hole.

NOTICE:

Make sure to use clean and dry air.

NOTICE:

1. Check the mark on the front vane pump housing and replace the flow control valve with one having the same mark as that of the front vane pump housing.
   
2. Refer to the following table to select an appropriate combination of front vane pump housing and flow control valve.
   
   

   Combination of Front Vane Pump Housing and Flow Control Valve:

   
   

   Front Vane Pump Housing Mark	Flow Control Valve Mark	Flow Control Valve Part No.
   A	A	44330-0K010
   B	B	44330-0K020
   C	C	44330-0K030
   D	D	44330-0K040
   E	E	44330-0K050
   F	F	44330-0K060

Coat the flow control valve with power steering fluid.

NOTICE:

Make sure to use new power steering fluid.

Insert the flow control valve into the flow control valve installation hole of the front vane pump housing, and check that the flow control valve enters smoothly under its own weight.
If the flow control valve does not enter the front vane pump housing smoothly, replace the flow control valve.

Using a vernier caliper, measure the free length of the flow control valve compression spring.

Minimum free length:

29.2 mm (1.15 in.)

If the union seat in the pressure port union is severely damaged, replace the pressure port union.