Page 276
REPAIR INSTRUCTIONS, PART 1
INSPECTION AND CLEARANCE CHECKS
Refer to Figure 306.
1. Clean and inspect the oil pump housing for
scoring, cracks or other damage. If any of
these conditions exist, replace the oil pump.
2. Check the bushings in the pump housing for
burrs, nicks or cracks.
The bushings are an integral part of the oil pump
housing. If the bushings are damaged, replace
the oil pump housing.
3. Clean and inspect the relief valve spring for
breaks. Replace as necessary.
4. Clean and inspect the plunger outer
diameter for galling and scoring. Light
galling or scoring will not affect function of
the plunger; if moderate-to-heavy, replace
both the plunger and cover.
5. Inspect the plunger seating surface for burrs
or nicks. If the seating surface contains burrs
or nicks, repair the seat as follows:
a.
Place valve lapping compound on the
plunger seat.
b.
Insert the plunger in the relief valve
housing and rotate the plunger against
the seat to smooth the seat.
c.
Remove the plunger and clean it.
6. Check the pump idler gear for free play by
spinning it on its shaft. If any binding occurs,
check the housing bore and gear teeth for
burrs, nicks or other damage. Replace as
necessary.
7. Insert the integral pump gear and shaft, and
thrust washer into the housing; check for
free play by spinning the gear. If any binding
occurs, check the housing and gear teeth for
burrs, nicks or other damage. Replace as
necessary.
Before proceeding with assembly of the pump,
insert the integral pump gear and shaft, and idler
gear in the housing. Check end clearance, side
clearance and backlash of the gears as follows.
End Clearance Check
Refer to Figure 307. With the pump gear and idler
gear in place, position a straightedge across the
housing and the face of the gears. Check end
clearance as follows:
앫
Low Limit — Run a 0.003-inch (0.076 mm)
thickness gauge between the straightedge
and the gears. The gauge should move
freely without binding. If binding occurs,
check the gears for nicks or burrs. Replace
as necessary.
앫
High Limit — Run a 0.007-inch (0.178 mm)
thickness gauge between the straightedge
and the gears. The gauge should be very
tight. If the gauge moves freely, replace the
gears.
307
Figure 307 — Oil Pump Gear/Idler Gear Assembly End
Clearance Check
1. Thickness Gauge
2. Straightedge
3. Pump Gear
4. Pump Idler Gear
5-111.bk Page 276 Monday, July 10, 2006 2:26 PM
Summary of Contents for ASET AC
Page 6: ...TABLE OF CONTENTS Page iii TABLE OF CONTENTS 5 111 bk Page iii Monday July 10 2006 2 26 PM...
Page 14: ...INTRODUCTION Page 1 INTRODUCTION 5 111 bk Page 1 Monday July 10 2006 2 26 PM...
Page 23: ...Page 10 NOTES 5 111 bk Page 10 Monday July 10 2006 2 26 PM...
Page 96: ...COMPONENT LOCATOR Page 83 COMPONENT LOCATOR 5 111 bk Page 83 Monday July 10 2006 2 26 PM...
Page 99: ...Page 86 NOTES 5 111 bk Page 86 Monday July 10 2006 2 26 PM...
Page 100: ...TROUBLESHOOTING Page 87 TROUBLESHOOTING 5 111 bk Page 87 Monday July 10 2006 2 26 PM...
Page 140: ...MAINTENANCE Page 127 MAINTENANCE 5 111 bk Page 127 Monday July 10 2006 2 26 PM...
Page 153: ...Page 140 NOTES 5 111 bk Page 140 Monday July 10 2006 2 26 PM...
Page 383: ...Page 370 NOTES 5 111 bk Page 370 Monday July 10 2006 2 26 PM...
Page 479: ...Page 466 NOTES 5 111 bk Page 466 Monday July 10 2006 2 26 PM...
Page 480: ...SPECIFICATIONS Page 467 SPECIFICATIONS 5 111 bk Page 467 Monday July 10 2006 2 26 PM...
Page 505: ...Page 492 NOTES 5 111 bk Page 492 Monday July 10 2006 2 26 PM...
Page 513: ...Page 500 NOTES 5 111 bk Page 500 Monday July 10 2006 2 26 PM...
Page 519: ...Page 506 NOTES 5 111 bk Page 506 Monday July 10 2006 2 26 PM...
Page 520: ...APPENDIX Page 507 APPENDIX 5 111 bk Page 507 Monday July 10 2006 2 26 PM...
Page 528: ...INDEX Page 515 INDEX Index fm Page 515 Monday July 10 2006 2 48 PM...
Page 535: ...Page 522 NOTES Index fm Page 522 Monday July 10 2006 2 48 PM...