d04924.fm
INSTALLATION MANUAL
BRP-Powertrain
Effectivity: 912 Series
Edition 2/Rev. 0
75-00-00
page 21
August 01/2012
3.3) ROTAX overflow bottle (optional extra)
General note If the optional ROTAX overflow bottle is used, the purging system must be
arranged as shown below.
NOTE: To vent coolant steam from the overflow bottle in case of
overheating, the plastic cap can be retrofitted with a hose
nipple and hose.
The purging line (5) must be routed so that coolant cannot
come in contact with the hot exhaust system.
The vent line must be routed in a continuous decline or
furnished with a drain bore at its lowest point to drain any
condensation.
The line must be protected from any kind of ice formation
from condensation, e.g. insulation protection or routing in a
hose with hot air flow and furnishing the line with a bypass
opening before the cowling outlet.
Work instruction See Fig. 10.
Procedure for attaching the hose nipple:
Steps for attaching the hose:
Step Procedure
1 Unscrew the plug screw (2) from the overflow bottle.
2 Bore the existing purging hole from dia. 2.5 mm (0.10 in.) to dia. 6 mm
(0.236 in.).
3 Apply LOCTITE 603 to the threads of the hose nipple (3).
4 Insert hose nipple (3) with the thread first into the vent hole.
5 Fix M6 hex. nut (1) onto the hose nipple (3). Tightening torque 5 Nm
(3.69 lbft).
6 Screw the plug screw onto the overflow bottle.
Step Procedure
1 Secure the hose with a gear-type hose clip (4) or spring type hose clip.
2 Secure and route the hose (5) without kinks.
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