Rotary Seal - Removal; Rotary Seal - Installation - Rotax 912 Series Maintenance Manual

3.6)

Rotary seal - removal

See Fig. 75-6.
Remove old shaft seal and rotary seal using 2 pins (1) of 5 mm (0.2 in.) diameter
and a suitable punch (2). Shaft seal and rotary seal will be destroyed during
removal and must be replaced.
3.7)

Rotary seal - installation

See Figs. 75-7, 75-8, 75-9 and 75-10.
Press new shaft seal (1) 12x30x7, pre-oiled sealing lip showing inwards, into
ignition housing using insertion jig (2), part no. 876510.
Carefully press rotary seal (3) on punch (4), part no 877258, and press the water
pump shaft (5) carefully into the positive stop of the punch, conical end first.
Insert the pump gear (6) into the ignition housing with the wide collar pointing
towards the crankcase sealing surface, see Fig. 75-10. Turn punch (4) around
and push the water pump shaft (5) with the press fitted rotary seal (3) into the
ignition housing. As you do so, position the drive gear so that it is flush with the
pump shaft.
Now place the ignition housing on a flat surface and, using a hand press, press
the water pump shaft in to the stop with max. 20 kN with punch (4), part no.
877258. Then turn ignition housing and press water pump shaft back using a 10
mm (3/16 inch) bolt until the collar of the water pump shaft is flush with the
sealing surface of the water pump housing. Turn water pump shaft to check for
clearance and free movement.
◆
NOTE:
See also SI-912-001 and SI-914-001, "Installation of rotary water pump seal and
water pump impeller", latest issue.
Effectivity 912/914 Series
Edition 1 / Rev. 0
BRP-Rotax
Maintenance Manual
The spring of the rotary seal presses the water pump shaft
outwards towards the sealing surface (11), depending on the
axial clearance (14), see Fig. 75-10.
75-00-00
page 10
May 01/2007