FUEL PUMP - CONTINUED
GEAR PUMP REPAIR - CONTINUED
For general cleaning procedures, see General Maintenance Instructions, page 2-3.
Gear pump housing
(1) and gear pump
Check gear pump housing and gear
pump cover for scoring or wear.
Discard if scored or worn.
Using 0- to 1-inch depth micrometer,
measure depth of gear pump housing
Gear pocket depth should be 0.7478
to 0.7483 inch (18.994 to 19.006
mm). Discard if depth exceeds
0.7483 inch (19.006 mm).
Using bore gage, measure shaft bore
diameters in gear pump housing and
gear pump cover. Shaft bore should be
0.5013 to 0.5016 inch (12.733 to
Discard if shaft bores exceed 0.5016
inch (12.740 mm).
Drive gear and shaft
(3) and driven gear
and shaft (4)
Inspect shafts for wear or scoring.
Discard if worn or scored.
Using 0- to 1-inch micrometer, meas-
ure diameter of shafts.
Shafts should be 0.4998 to 0.5001
inch (12.695 to 12.703 mm). Discard
if worn smaller than 0.4998 inch
Check gears for damage.
Discard if worn.
Using 0-to 1-inch micrometer, meas-
ure width of drive gear and driven gear.
Gear width should be 0.7483 to
0.7486 inch (19.006 to 19.014 mm).
Discard gears if smaller than 0.7483
inch (19.006 mm).