Rotax 912 i Series Maintenance Manual page 150

DOG HUB CHECK
Step
1 Visually check the dog hub for visible pit-
ting on the gear-tooth system and/or in
the engagement faces of the dogs; see
section 72-10-00 Wear limits. (GB08)
NOTE: The cam peaks of the gear must
never rest in the trough of the
dog hub.
2 Measure the gap between the cam peak
and the cam trough; see section
72-10-00 Wear limits. (GB07)
NOTE: Slight to moderate traces of
wear and pitting on the dogs are
permissible.
Fig. 14
1. Dog hub
THRUST WASHER CHECK, BEARING
BUSHING CHECK
Step
1 Measure the thickness of the plastic thrust
washer between the gear set and the
drive gear; see section 72-10-00 Wear
limits. (GB11)
2 Check the heat-treated steel bearing
bushing for wear.
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
Procedure
2. Gear (propeller shaft)
Procedure
Fig. 15
1. Thrust washer
3. 29T drive gear
STEP COLLAR CHECK, DISC SPRING
CHECK
Step
1 Check the step collar in the vicinity of the
disc spring support for wear.
2 If wear of the disc springs is visible in the
contact area, replace the disc springs.
Inspect the dimension (GB13) of the non-
tensioned disc spring; see section 72-10-
00 Wear limits.
Fig. 16
1. Step collar
2. Gear (propeller shaft)
4. Bearing bushing
Procedure
2. Disc springs
72-10-00
Page 12
July 01/2012