5.16.3. Repair of the oil pump

It will be required to you: a key "on 10", keys hexagons "on 5" and "on 8", two screw-drivers, a caliper, a micrometer.
1. Remove the oil pump from the car (see. "Removal and installation of the oil pump").
2. A key "on 10" turn out a bolt of fastening of the sensor of provision of a bent shaft …
3. … also remove the sensor.
4. A six-sided key "on 5" turn out six bolts of fastening of a cover of the pump.
5. By means of two screw-drivers raise a pump housing so that adjusting pins on a cover left openings in the case, and remove a pump housing from a cover.
6. Take out from the case the leader...
7.... and conducted pump gear wheels.
8. A six-sided key "on 8" turn out a stopper of the reducing valve. Pay attention that under a stopper the aluminum sealing ring is established. Replace strongly pressed out ring.
9. Take out a spring of the reducing valve.
10. Take out the reducing valve, having carefully knocked with a cover about a pure wooden board. If the valve does not leave, take out it by means of the pointed wooden stick.
11. Examine a cover. In a zone of a prileganiye of gear wheels on it there should not be noticeable wear tracks, zadir and deep scratches. Otherwise replace a cover.
12. Examine a pump housing. On its working surfaces there should not be noticeable wear tracks, zadir and deep scratches. Otherwise replace the case.
13. Measure diameter of a nest of the conducted gear wheel in a pump housing. Maximum permissible diameter is 75,1 mm. If the size exceeds specified, replace the case.
14. Measure pump housing segment width in a middle part. If width less than 3,4 mm, replace the case.
15. Measure thickness of the leading gear wheel. If it less than 7,42 mm, replace a gear wheel.
16. Measure thickness of the conducted gear wheel. If it less than 7,35 mm, replace a gear wheel.
17. Check axial gaps of gear wheels. For this purpose establish the leading gear wheel in a cover, put a metal ruler on a cover and measure by the probe a gap between a ruler and a gear wheel.
18. Measure by the same way an axial gap of the conducted gear wheel. A maximum permissible axial gap of the leading gear wheel of 0,12 mm conducted – 0,15 mm. If gaps exceed specified, replace gear wheels.
19. More precisely axial gaps of gear wheels can be received calculation. For this purpose measure by a micrometer case thickness on external surfaces...
20.... and cover thickness in a nest zone under gear wheels in several places (on the milled surfaces). Calculate an axial gap as a difference of arithmetic-mean value of depth of a nest and thickness of gear wheels.
21. Examine a nest of the reducing valve. On its internal surface there should not be zadir and deep scratches. Otherwise replace the case.
22. Replace the reducing valve if on it there are teases and deep scratches.
23. Replace the bent, broken or burst spring of the reducing valve. Spring height in a free state has to make 44,72 mm, under load (4±0,24) kgfs – 31,7 mm. Otherwise replace a spring.
24. Establish the conducted gear wheel in a pump housing. Facets on teeths of a gear wheel have to be turned to the case.
25. Establish the leading gear wheel in a pump housing. Facets on teeths of a gear wheel have to be turned to the case.
26. Install the case on a cover and screw fastening bolts.
27. Oil engine the reducing valve and install it in a nest by a bottom down. Then establish a spring and wrap a stopper with a sealing ring.
28. Through an opening under an oil receiver fill in engine oil in the pump.
29. Turn pump gear wheels on several turns to grease their working surfaces.