8) Crosssection Of Water Pump - Rotax 912 Series Maintenance Manual

13.3.8)
Effectivity: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL II
Crosssection of water pump
See fig. 082.
Check axial position of water pump shaft and pump gear. Large collar Q
of the gear shows inward to the sealing face.
To warrant the correct gap E (dimension T in para 15)
NOTE:
between impeller R and water pump housing T, ensure
alignment of shoulder W on water pump shaft with
sealing face Y of ignition cover U. If need be, place
ignition cover on a hardened and ground face plate with
an 8 mm (0.3 in.) dia. clearance hole, and press shaft
backwards accordingly, using a 10 mm (0.4 in.) dia. pin.
Trial spin the pump shaft installed.
Place washer I TNr. 926 273 of stainless steel on the shaft. Fit impeller
R part no.922 224 turning clockwise, tighten with special wrench, part no.
877 295. Torque to 15 Nm (133 in.lb).
Check impeller R for out-of-round. At noticeable out-of-
NOTE:
round replace impeller or if necessary also the pump shaft.
02873
1
9
fig.082
7
6
Maß
T
dim.
8
3
2
4
5
Initial issue, Jan. 01/2002
page 57