ENGINE
INTERNAL ROTOR
Check that the internal and external surfaces and the faces
are not scored or damaged, otherwise renew both rotors.
Internal rotor data:
-
external ø
29.745÷29.770 mm (in 1.1711 ÷ 1.1720);
-
ø of bore for pump drive shaft
12.000÷12.018 mm (in 0.4724 ÷ 0.4731);
-
thickness
14.960÷14.990 mm (in 0.5890 ÷ 0.5902).
ROLLER BEARINGS
Check that the bearing rollers are not damaged, otherwise
renew the bearings.
OIL PUMP DRIVE SHAFT
Check that the drive shaft is not damaged and that the
threads are in good condition, that the keyway is not burred
and that the end that operates in the internal rotor is not
damaged, otherwise renew the shaft.
Shaft data:
-
ø for pump body bore
11.982÷12.000 mm (in 0.4717 ÷ 0.4724);
-
ø for roller bearings
9.991÷10.000 mm (in 0.3933 ÷ 0.3937).
ASSEMBLY CLEARANCES
-
between pump body and external rotor
0.080÷0.135 mm (in 0.0031 ÷ 0.0053);
-
between bore on internal rotor and pump drive shaft
0.016÷0.061 mm (in 0.0006 ÷ 0.0024);
-
between bore on pump body and pump drive shaft
0.016÷0.061 mm (in 0.0006 ÷ 0.0024).
4 - 100
V750 IE