Checking Fuel Flow - WACKER Group LTC 4 Repair Manual

LTC Repair
6.6

Checking Fuel Flow

See Graphic: wc_gr002476
6.6.1
6.6.2
6.6.3
wc_tx000476gb.fm
Caterpillar Engine Troubleshooting
To check the fuel flow on Caterpillar engines, carry out the following
procedures.
Loosen the screw securing the banjo fitting (a).
Place the keyswitch in the START position and check for fuel flow from
the banjo fitting.
If fuel flows from the banjo fitting, retighten the screw and check the
operation of glow plugs.
If fuel does not flow from the banjo fitting, continue.
Place the keyswitch in the START position and check for battery
voltage between the fuel solenoid R/W wire (b) and ground.
If battery voltage exists between the R/W wire and ground, gravity feed
fuel through fuel intake line while cranking the engine using a 20-
second on, 30-second rest sequence. Do this until fuel flows from the
banjo fitting—tighten the fitting as soon as fuel is seen flowing through
it. Continue this process until the engine starts. After the engine starts,
reconnect the fuel intake line to the tank.
If battery voltage does not exist between the fuel solenoid R/W wire
and ground, check the continuity of the wire. Repair or replace the
wiring as needed. Refer to the Caterpillar engine repair manual for
further procedures.
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