Water Pump Housing - Dismantling And Inspection - Rotax 912 Series Maintenance Manual

3.2)

Water pump housing - dismantling and inspection

See Fig. 75-3
Remove the 2 allen screws M6x20 (1) of the water inlet elbow (2) and remove
the elbow with the O-ring.
◆
NOTE:
Release all 4 screw hose clamps or spring band hose clamps of the water
drainage hoses and pull them off water pump housing. The water pump housing
(4) with gasket (5) can be taken off by removing 5 more allen screws M6 (3).
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CAUTION:
Check inside for traces of possible contact with impeller (8). The necessary
clearance can be achieved by axial spacing of the water pump shaft. The washer
(9) fitted behind the impeller is of stainless steel.
Remove the impeller (8) with special tool, part no 877295, with crankshaft
locked, turning counter-clockwise.
Check the coolant fitting (10) screwed into the water pump housing for leakage,
cracks and tight fit, replace if necessary. Mark the position of the bent socket.
Warm up water pump housing to approx. 80 °C (180 °F) and remove the socket.
Clean threads (11) carefully of LOCTITE residue, apply LOCTITE 243 to the new
coolant fitting and fit it into position with at least 5 turns.
Normally, fittings with a bend angle of 45° are fitted. On the 914 engine and
engines with ROTAX engine suspension frame, there is a fitting with a bend
angle of 80° fitted at cylinder 2.
Effectivity 912/914 Series
Edition 1 / Rev. 0
BRP-Rotax
Maintenance Manual
Mark the position of the water inlet elbow with a suitable pen
(touchup pen).
The allen screw (6) protrudes into the water compartment and
is therefore of stainless steel and sealed with the sealing ring (7).
75-00-00
page 7
May 01/2007