ITW GSE 4400 Tier 4, Manual

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Operation Manual – ITW GSE 4400 Tier 4
g) Draining the Fuel Tank
1) The fuel tank should be drained and cleaned out annually, when the various fuel filters
start to become excessively fouled and before storing the unit for long periods of time.
2) Before draining the fuel tank, we recommend pumping at least 90% of the fuel out of the
tank (use the operator display to determine the amount of fuel remaining). The fuel tank
has two 1/8” NPT fittings with thread sealant on them that are accessible under the trailer,
once it is lifted up. (Use a 7/16” wrench or socket to remove the fitting.)
3) Once the tank is fully drained, verify that there is no debris in the bottom of the tank on
either side. If any dirt, material or build up exists inside the tank, flush with diesel fluid to
remove the foreign material.
4) Use the following procedure to re-install the fittings:
a) The proper method of assembling tapered threaded connectors is to assemble them
finger tight, then wrench tighten to the specified number of turns from finger tight. The
following assembly procedure is recommended to minimize the risk of leakage and/or
damage to components.
i. Inspect components to ensure that male and female port threads and sealing
surfaces are free of burrs, nicks and scratches, or any foreign material.
ii. Apply sealant/lubricant to male pipe threads if not pre-applied.
b) With any sealant, the first one to two threads should be left uncovered to avoid
system contamination. If PTFE tape is used it should be wrapped 1-1/2 to 2 turns in
clockwise direction when viewed from the pipe thread end. (Caution: More than two
turns of tape may cause distortion or cracking of the port.)
c) Screw the connector into the port to the finger tight position.
d) Wrench tighten the connector to 1.5 - 3 turns past finger tight. Never back off (loosen)
pipe threaded connectors to achieve alignment.
e) If leakage persists after following the above steps, check for damaged threads and
total number of threads engaged.
f) If threads on the fitting are badly nicked or galled, replace the fitting. If port threads
are damaged, re-tap, if possible, or replace the component. If the port is cracked,
replace the component.
g) Normally, the total number of tapered threads engaged should be between 3-1/2 and
6. Any number outside of this range may indicate either under or over tightening of
the joint or out of tolerance threads. If the joint is under tightened, tighten it further but
no more than one full turn. If it is over tightened, check both threads, and replace the
part which has out-of-tolerance threads.
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