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WEBASTO THERMO 300 5INSTALLATION
5-7
5.8 Fuel System
5.8.1 General Information
The fuel is drawn from the vehicles fuel tank through a fuel standpipe. This standpipe can be utilized on vehicles with
a spare threaded port as shown in figure 5-5. The Webasto heater utilizes 37° flare JIC fuel connection fittings. The
fuel supply line fitting is a JIC #4 and the return line is a JIC #6.
5.8.2 Fuel Supply
IMPORTANT!
Keep the submerged end of fuel standpipe at least 2” from bottom of fuel tank.
The fuel standpipe and fuel line must be installed according to these instructions to insure proper heater operation.
Fig. 5-5: Fuel Standpipe Installation
CAUTION
Whenever the fuel tank is situated higher than the Webasto heater, the top of the fuel tank must not be more than
500 mm (20 in.) above the heater.
NOTE:
The Thermo 300 heater is equipped with a self priming fuel pump. Priming the fuel system or fuel filters is generally
not necessary.
1. Cut fuel standpipe to length, approx. 2” off fuel tank bottom.
NOTE:
After fuel standpipe has been cut to length, remove burrs from opening.
On Haulage T
rucks
Use an open port NEAR the bottom of that fuel tank, at least 2” above bottom.
On Mining, Drill Rigs, Marine, and other Off-highway applications that have large fule tanks use a spare
port that is at least 2” from the bottom of the tank.
If the fuel tank is small enough to be able to use the standpipe follow the directions listed below for installation guide.
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