Fluid Pump: Testing and Inspection

DISASSEMBLY OF OIL PUMP




1. REMOVE PUMP COVER




2. REMOVE CHECK BALL, PRIMING VALVE AND SPRING




3. REMOVE PRESSURE REGULATOR VALVE ASSEMBLY




4. REMOVE TWO OIL SEAL RINGS FROM FRONT SUPPORT

INSPECTION OF OIL PUMP




1. CHECK BODY CLEARANCE OF DRIVEN GEAR
Pull the driven gear to one side of the body. Using a feeler gauge, measure the clearance.

Standard body clearance: 0.07 - 0.15 mm (0.0028 - 0.0059 in.)




2. CHECK TIP CLEARANCE OF BOTH GEARS
Measure between the gear teeth and the crescent-shaped part of the pump body.

Standard tip clearance: 0.11 - 0.14 mm (0.0043 - 0.0055 in.)




3. CHECK SIDE CLEARANCE OF BOTH GEARS
a. Using a steel straightedge and a feeler gauge, measure the side clearance of both gears.

Standard side clearance: 0.02 - 0.05 mm (0.0008 - 0.0020 in.)




b. If not within specification, select and install the proper gears.




4. INSPECT FRONT OIL SEAL
Check for wear, damage or cracks. If necessary, replace the oil seal as follows.
a. Pry off the oil seal with a screwdriver.
b. Using SST and hammer, install a new oil seal. The seal end should be flush with the outer edge of the pump cover.
SST 09350-20013 (09388-20010)




5. INSPECT OF REGULATOR VALVE AND PLUNGER
a. Pull out the plunger about half way and release it.
b. The plunger should sink down into the sleeve by its own weight.







6. INSPECT OF PRIMING VALVE, CHECK BALL VALVE AND SPRING
Check for a clogged priming valve orifice.

ASSEMBLY OF OIL PUMP



1. INSTALL DRIVEN GEAR AND DRIVE GEAR
2. INSTALL PRIMING VALVE AND CHECK BALL VALVE




3. INSTALL OIL PUMP COVER

NOTE: Wrap the stator shaft spline with vinyl tape to protect the oil seal from damage.




4. TEMPORARILY TIGHTEN PUMP COVER BOLTS




5. CHECK DRIVE GEAR ROTATION
Turn the drive gear with a screwdriver and make sure that it rotates smoothly.

NOTE: Be careful not to damage the oil seal.




6. INSTALL PRESSURE REGULATOR VALVE ASSEMBLY

7. INSTALL TWO OIL SEAL RINGS ON FRONT SUPPORT
Spread apart and slide the rings into the groove.
Hook both ends by hand.
Wipe off any excess petroleum jelly.




8. INSTALL NEW O-ring ON PUMP
Make sure the O-ring is not twisted and is fully seated in the groove.

NOTE: After installing the oil seal rings, check that they move smoothly.