Proheat M125 - Manual (Page 43)

PROHEAT fuel filter – Check:
a) For filter contamination and restrictions.
b) For damaged inlet fitting.
Test Procedure – Fuel filter inspection, cleaning and/or replacement:
a) Disconnect the fuel supply line at the PROHEAT.
b) Remove the fuel filter adapter and fuel inlet fitting located in the
burner head.
c) Remove O-ring and filter. Inspect for contamination and/or restrictions.
Clean filter using electrical contact cleaner or warm soapy water.
Replace if necessary.
d) Inspect the O-rings for contamination and/or damage. Clean O-rings
with a cloth or replace as necessary.
e) Inspect and clean the filter cavity and O-ring seat as necessary using
contact cleaner.
f) Reinstall filter, O-rings and inlet adapter. Tighten the adapter until it
bottoms out against the face.
g) Reconnect the fuel supply line.
h) Switch the PROHEAT on and operate for at least one complete cycle.
Observe the operation.
If a Start diagnostic code is indicated, proceed to Step 3.
START: Fuel System Step 2
(1 Flash)
Figure 4-4: Fuel Filter Assembly and Location.
O-RING
FILTER ADAPTER
TORQUE = SEE
SECTION 1.3
O-RING
INLET FITTING
TORQUE = 100 ± 10 in. lbs
(11.3 ± 1.1 Nm)
THREAD
SEALANT
REQUIRED
WARNING
Spilt fuel is flammable.
NOTICE
There is a screen located after the
fuel filter in the FDB. See Figure 4-3.
NOTICE
There are two screens located in the
fuel system please see page 4-15.
NOTICE
All plugs/harnesses must be rein-
stalled into the G-II Proheat Control
Module (G-II PCM) before heater
goes back into service.
4-6 PROHEAT M-SERIES G-II PCM SERVICE MANUAL
Figure 4-3: FDU Fuel Filter Location.