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TM 5-2420-222-34
5-3.
FUEL METERING PUMP HELICAL GEAR REPLACEMENT (Con’t).
4.
Remove timing gear cover (see paragraph 3-18).
5.
Remove nut (9) and lockwasher (10). Use mechanical gear puller to remove fuel metering pump helical gear (8)
from fuel metering pump drive shaft (5) and upper idler gear (7). Discard lockwasher.
b.
CLEANING AND INSPECTION
WARNING
Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear protective
goggles and gloves, and use only in a well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open flame
or excessive heat. The solvent's flash point Is 100°F-138°F (38°C-59C). If you
become dizzy while using cleaning solvent, immediately get fresh air and medical
help. If solvent contacts eyes, Immediately wash your eyes and get medical aid.
1.
Clean fuel metering pump helical gear with dry cleaning solvent and rags. Dry thoroughly with clean, dry rags.
2.
Inspect fuel metering pump helical gear and nut for cracks, breaks, bends, burrs, and damaged threads. Replace
if defective.
c.
INSTALLATION
1.
Install fuel metering pump helical gear (8) on end of fuel metering pump drive shaft (5).
2.
Install nut (9) and new lockwasher (10) on fuel metering pump drive shaft (5) and fuel metering pump helical gear
(8). Torque nut to 45 lb.-ft. (61 N•m).
3.
Using timing alinement tool, aline timing slash-mark on fuel metering pump helical gear (8) with center of
crankshaft (6). Push fuel metering pump helical gear and fuel metering pump drive shaft (5) in until gears are
meshed.
4.
Install timing gear cover (see paragraph 3-18).
5.
Remove pin (1) from flywheel (3) and flywheel housing (4).
6.
Install pin (1) and cover (2) on flywheel housing (4).
5-16
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