81
Lubrication system
Oil pump, inspection (18A-07)
If the rotors are so damaged that it affects the oil
pump capacity, the whole oil pump must be re-
placed.
1
Unscrew the screws and remove the oil pump back
plate.
2
Remove the rotors and check the all the compo-
nents thoroughly. Check for cracks and other dam-
age.
3
Install the rotors in the pump housing and check the
outer rotor play against the housing (A).
4
Check the inner rotor clearance against the outer
rotor (B).
5
Check the rotor axial clearance using a ruler and a
feeler gauge (C). For size and all clearances, see
Workshop Manual “Technical Data”.
6
If the sealing ring needs changing, remove the ro-
tors and press the sealing ring out of the housing.
The pump is easier to install on the engine with the
sealing ring uninstalled and the sealing ring can be
installed on the installed pump, see operation 14A-
02.
If necessary the sealing ring can be installed on the
dismantled pump. Ensure that the sealing lip is
turned in towards the pump and that the sealing is
inserted flat to the pump. Use a suitable adapter
and press in the sealing ring in the pump until the
sealing ring front surface is 0.5 mm lower than the
housing surface.
7
Lightly apply fresh engine oil to the rotors and insert
them in the pump. The inner rotor has a lug in one
end and this tap must be turned towards the sealing
ring housing. Install the back plate with the word
“TOP” turned from the pump housing straight edge
(D). Install and tighten the screws for the back plate
to 4 Nm.
Summary of Contents for MD22
Page 1: ...Engine repair MD22 TMD22 TAMD22 Workshop Manual 2 0 A ...
Page 2: ......
Page 129: ...127 Notes ...
Page 130: ...128 Notes ...
Page 132: ...7738684 5 English 04 1999 ...