3) Oil Pump Checking - Rotax 914 F Maintenance Manual

00073
Pic. 93
8
8
8
00076
Pic. 95
12
11
10
00071
9
Pic. 97
Page Date
144 1997 02 01

13.2.1.3) Oil pump checking

See Pic. 93/94/95/96 and 97.
Visually check all components of oil pump.
Check inside Q of oil pump cover with a straightedge W for wear.
Check all revolving pistons and rotors of pump. At noticeable furrows on
mating faces of rotor inside E and revolving piston outside R renew both
components.
2
1
Insert revolving pistons and rotors into their respective housings.
Check gap W (suction oil pump) between
crankcase flange surface — revolving piston
crankcase flange surface — pump rotor
Check gap W (main oil pump) between
crankcase flange surface T — revolving piston Y
crankcase flange surface T — pump rotor U
A bigger gap greatly reduces
pump capacity.
Check sealing faces of both oil pump housings and pump cover, plane on an
even plate if necessary.
Check pump shaft on the bearing seats I.
Remove plug screw O, spring P and ball {, clean and check ball seat }
in pump housing. The shim q is only fitted if required to reach specified oil
pressure.
Clean all parts and clear oil bores with compressed air.
Dimensions
See Chapter 15.
Main
914 F
4
3
W
00074
New
Reference
4
3
6
7
00076
0
90 10
80 20
70 30
0
1 9
0.01mm
2
8
3
7
4 5 6
60 40
50
5
6
7
Wear limit
Modification no.
Pic. 94
Pic. 96
- 0 -