Expansion Tank, Radiator Cap - Rotax 915 i A SERIES Maintenance Manual

EXPANSION TANK, RADIATOR CAP

Figure 7.9: Expansion tank, radiator cap
General note To equalize pressure in the cooling system, an expansion tank is required. If the pressure
in the system rises above 1.2 bar (17.4 psi) as the coolant warms up, the pressure relief
valve (1) opens and the coolant can flow into the expansion tank via the line (5). When the
coolant cools down, the return valve (2) opens and the coolant is sucked back.
Radiator cap Inspect the rubber seal (3), the pressure spring (4) and the two valves incorporated in the
radiator cap for damage and leaks. If necessary, replace with a new original radiator cap
with 1.2 bar (17.4 psi) (6) opening pressure.
N N O O T T E E
The radiator cap must be tightened fully on the expansion tank.
Expansion tank Inspect sealing surface (7) and tube connection (8) of the expansion tank. Carry out visual
inspection of tank for damage and scuffing marks.
Effectivity: 915 i A Series
Edition 0/Rev. 0
BRP-Rotax
MAINTENANCE MANUAL
1 Pressure relief valve
3 Rubber seal
5 Connection to overflow bottle
Sealing surface
7
Sight glass
9
2 Return valve
Pressure spring
4
Opening pressure of the radiator cap
6
8 Tube connections
12–20–00
Page 21
December 01 2017