8.7 Removal and Installation
CAUTION
When the heater is installed it must not be dismantled.
8.7.1 Air Heater, Removal and Installation
8.7.1.1 Removal
1. Disconnect battery terminal leads.
2. Withdraw cover from upper housing shell according
to 9.2.1.
3. Disconnect the wire harness plug from control unit.
4. Disconnect interior air ducts if present.
5. Disconnect cable to dosing pump at cable disconnect.
6. Disconnect fuel inlet on air heater.
7. Disconnect connections of combustion air intake and
exhaust outlet on air heater.
8. Remove four nuts and lock washers on air heater.
9. Remove air heater and discard gasket.
8.7.1.2 Installation
1. Locate air heater with new gasket in installation
position and secure with four nuts and lock washers
(use original Webasto nuts only).
2. Tighten nuts with 6 + 1 Nm.
3. Secure connection for fuel inlet on air heater.
4. Secure connections for combustion air inlet and ex-
haust outlet on air heater.
5. Route cable to dosing pump and connect to dosing
pump.
6. Connect wire harness to control unit.
7. Install cover and secure.
8. Reconnect battery terminal leads.
9. Install interior ducting if present.
10. Bleed fuel supply system (see 8.8).
808
8 Servicing
Air Top 2000 S
NOTE
After you have installed the heater, bleed the fuel supply
system carefully.
As a result of the low fuel consumption the heater must
be switched on several times to fill the fuel line.
Conduct a trial of the heater to check all the connections
for leaks and to ensure that they are secure. If the
heater suffers a fault during operation, the fault must be
located and remedied.
8.8 Start-Up
