A SERVICE OF

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5INSTALLATION
W
EBASTO
S
CHOLASTIC
S
ERIES
5-6
8 Remove hose clamping pliers and/ or open shut off valves.
9. Purge air from the Webasto heater by opening the bleeder valve screw (see page 2-1, figure 2-1, item 26).
10. Top off engine coolant as per engine manufacturer’s recommendations and re-install the radiator cap.
Do not install the previously removed heater hose access covers at this time. Hose connections will require
inspection and re-tightening of clamps once installation is completed and tested (see section 5.9 “Initial Operation”).
NOTE:
Heater hose must meet SAE 20 R3 specifications. Silicone heater hose requires special hose clamps. Hose clamps
must be tightened to 5 Nm (45 lb/in.) torque.