d05785.fm
INSTALLATION MANUAL
BRP-Powertrain
Effectivity: 912 i Series
Edition 1/Rev. 0
75-00-00
Page 15
January 01/2012
3.2) ROTAX overflow bottle (optional extra)
General note If the optional ROTAX overflow bottle is used, the purging system must be
arranged as shown below.
Retrofitting 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 (see Fig. 8).
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. 8.
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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