APRILIA RSV mille 956X Service And Repair Manual page 131

ENGINE
CHECKING THE OIL PUMP
Check the oil pump rotors, the sliding surfaces of the
external rotors in both pump casings and the thrust-
bearing surfaces for any signs of grooving.
Measure the play between the external rotors (7 - 15),
the engine casing (16) and the pressure pump casing
(9) using a feeler gauge.
Wear limit max. 0.25 mm.
Measure the end play (17) of the rotors.
Wear limit max. 0.15 mm.
NOTE
If the play exceeds one of the two wear limits,
the defective component must be replaced.
Make sure the adjusting piston (14) slides smoothly in
the oil pump lid.
Check the adjusting piston and oil pump lid for any
signs of wear:
– adjusting piston (14);
wear limit (18) min. Ø 9.975 mm;
– oil pump lid (5);
wear limit (19) max. Ø 10.035 mm;
– compression spring (13);
minimum lenght of the spring (20) when not com-
pressed: 56,0 mm.
Engage the adjusting piston (14) with the cone end fac-
ing forwards and insert the compression spring in the
slot on the oil pump lid (5).
®
Apply LOCTITE 648 on the caps thread (12).
Screw on the cap (12) 2 mm further in than the outer
edge of the neck of the oil pump lid (5) and secure it in
place by punching in four more points (21).
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RSV mille