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Page Title:
Overhaul of Fuel Injection Pump Fuel Tubes, Fuel Return Hoses, and Nozzle Fuel Return Tubes |
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 6-60.
Overhaul of
Fuel Injection Pump
Fuel Tubes,
Fuel Return Hoses,
and Nozzle Fuel Return Tubes
a. Disassembly. The fuel injection pump fuel
tubes and nozzle return fuel return tubes were
disassembled during disassembly of engine,
b. Cleaning, Inspection, and Repair. Refer to
paragraphs 6-2 through 6-4.
(1) Fuel Injection Pump Fuel Tubes. F l u s h
the fuel tube assemblies with a high pressure
flushing
device. After flushing, blow dry with
compressed air and plug tube ends with plugs or
caps to assure cleanliness. Inspect tubes for
correct
inside
diameter
hole
dimension.
The
correct inside dimension is 0.084-inch. Tubes
with larger or smaller hole diameter are to be
discarded.
On
original
production
engines,
fuel
tubes were hand formed from straight tubes.
Carefully inspect all tubes for proper con-
figuration using a current preformed tube of like
function for comparison. Excessive bending or
hand
forming
creates
high
stress
points
and
greatly reduces tube life. Discard any tube that
Comparison
of
serviceable
deviates from preformed comparison tube
original
production
and
improvised
Inspect tube assemblies for
configuration.
design
sleeves-fuel injection
cracks, splits or kinks and for defective safety
pump tube ends.
sleeve nut and sleeves. Refer to figures 6-248 and
6-249 for comparison of original production and
improvised design sleeve fittings shown in
serviceable and unserviceable condition.
Straighten minor bends in tubing when possible.
Discard
entire
tube
assembly
if
fittings
are
damaged or tubing has been kinked.
6-210
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