10:10. Oil pump

Oil pump
1 - the surface of swing of the bearing (replace if necessary);
2 – (replace) sealing rings;
3 – cover of the oil pump;
4 – flange of the oil pump;
5 – internal rotor; 		6 – external rotor;
7 – a washer (replace);
8 – spring;
9 – bypass pressure valve;
10 – casing of the oil pump;
11 – stopper

Dismantling

PERFORMANCE ORDER
1. Remove the surface of swing of the bearing.
2. Remove four sealing rings.
3. In the sequence given on the drawing, evenly, for several passes, weaken and turn out bolts. Uncover the oil pump from a casing of the oil pump.
4. Note the mutual provision of external and internal rotors and remove them from a casing of the oil pump.
5. Turn out a stopper and remove a washer, a spring and the valve of pressure.

Check

PERFORMANCE ORDER
1. Establish an external rotor and an internal rotor.
2. Measure a gap between a casing of the oil pump both external and internal rotors, not less than in four places on their circles.

Gap
Nominal gap: 0,02–0,04 mm
Maximum permissible gap: 0,05 mm
3. If the gap differs from demanded, replace the oil pump assembled.
4. Measure a gap between a ledge of the oil pump and an internal rotor, at least, in four places and calculates average value.

Internal diameter
Nominal: 0,04–0,115 mm
Maximum permissible: 0,125 mm

5. If the gap differs from demanded, replace the oil pump assembled.
6. Check the spring sizes in a free state.

Outer diameter: 11,8 mm
Length: 53,0 mm
Number of rounds: 12,0
Diameter of a wire of a spring: 1,2 mm
7. If the sizes of a spring differ from demanded, replace the oil pump assembled.

8. Measure the outer diameter of the valve of pressure.

Nominal diameter: 14,00 mm
Maximum permissible diameter: 13,98 mm

9. If diameter is less maximum permissible, replace the oil pump assembled.

Assembly

PERFORMANCE ORDER
1. Install bypass the valve of pressure and a spring in a casing of the oil pump, and check that the valve moves freely, without jammings.
2. Establish a new washer and a stopper.

Inhaling moment: 32–47 N • m
3. Combine the tags put before removal, and establish external and internal rotors.
4. Establish a flange of the oil pump.
5. Establish a cover on a casing of the oil pump.
6. Gradually, in a certain sequence tighten six bolts of fastening of a cover.

Inhaling moment: 8,1–10,9 N • m

7. Establish a shaft of the oil pump and, rotating pump rotors, check operation of the pump.
8. Establish four sealing rings.

9. Apply a layer of technical vaseline on the surfaces of swing of the bearing and establish it on a cover of the oil pump.

Outer diameter of a surface of swing of the bearing: 88.0 mm