TM-9-2815-200-35
ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED ,12 - CYLINDER , ASSEMBLY ;MODELS AVDS-1790-2M (2815-856-4996), AVDS-1790-2A AND AVDS-1790-2AM (2815-856-9005)
TECHNICAL MANUAL; DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
TM-9-2815-200-35 - Page 504 of 779
6-60. Overhaul of Fuel Injection Pum p
Fuel Tubes, Fuel Return Hoses ,
and Nozzle Fuel Return Tube s
a. Disassembly.
The fuel injection pump fue l
tubes and nozzle return fuel return tubes were
disassembled during disassembly of engine ,
Chapter
5 .
b. Cleaning, Inspection, and Repair.
Refer t o
paragraphs 6-2 through 6-4 .
(1)
Fuel Injection Pump Fuel Tubes.
Flus h
the fuel tube assemblies with a high pressur e
flushing device .
After flushing, blow dry wit h
compressed air and plug tube ends with plugs or
caps to assure cleanliness. Inspect tubes fo r
correct inside diameter hole dimension. Th e
correct inside dimension is 0.084-inch. Tube s
with larger or smaller hole diameter are to b e
discarded. On original production engines, fue l
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 o r
hand forming creates high stress points an d
greatly reduces tube life. Discard any tube tha t
Figure 6-248. Comparison of serviceabl e
deviates from preformed comparison tub e
original
production
and
improvised
configuration .
Inspec t
tube assemblies fo r
design sleeves-fuel injectio n
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 i n
serviceable and unserviceable condition .
Straighten minor bends in tubing when possible .
Discard entire tube assembly if fittings ar e
damaged or tubing has been kinked .
6-21 0
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