Removal And Installation - Webasto Air Top 3500 Workshop Manual

8 Servicing
8.7

Removal and Installation

CAUTION
With the heater installed no component removal or
disassembly procedures are permitted.
8.7.1 Heater, Removal and Installation
8.7.1.1 Removal
1. Disconnect vehicle battery.
2. Remove cover from upper housing shell according to
9.2.1.1.
3. Disconnect wiring harness connector from heater.
4. Disconnect fuel supply line from heater.
5. Disconnect combustion air intake line and exhaust
line from heater.
6. Remove four nuts and washers from heater.
7. Remove heater and discard gasket.
8.7.1.2 Installation
1. Locate heater with new gasket for installation and
secure with four nuts and washers (use Webasto
original nuts only).
2. Tighten nuts with 6 + 1 Nm.
3. Connect and secure fuel supply line to heater.
4. Connect and secure combustion air intake line and
exhaust line to heater.
5. Route cable to dosing pump and connect to dosing
pump.
6. Connect wiring harness connector to control unit.
7. Plug on cover and arrest.
8. Reconnect vehicle battery.
9. Bleed fuel supply system.
808
8.8 Initial Operation
After heater installation the fuel supply system must be
carefully bled.
Due to the low fuel consumption it is required to switch the
heater several times on and off for priming the fuel line.
During the heater test run inspect all connections for
leakage and security. Should the heater during operation
enter an error lockout condition, perform troubleshooting.
Air Top 3500/5000
NOTE