Barrel and plunger
Figure 3-27. Fuel injection pump housing and fuel pump, exploded view.
matched, not to be replaced individually). Test for
(7) Inspect pump plunger for wear or damage.
proper operation by mounting pumps on a test fixture
Replace a defective plunger. The length of a new
using the 2M5217 adapter group at the 10MM location.
plunger must range between 2.5931 and 2.5937 inches.
Set test fixture rack at 0.000 inches to properly mount
Replace a fuel pump when plunger length is worn in
pump. Use the 8M530 rack setting gage and check for a
excess of 0.004 inch.
full rack movement of + 0.312 inches in either direction.
(8) Inspect camshaft for scoring or wear.
Reset test fixture to a + 0.100 inches. The number of
Replace a scored, worn, or defective camshaft.
discharge strokes required is 140, then check volume of
(9) Inspect camshaft bearings for scoring or
fuel in collector tube of test fixture using the 8MM
wear. Replace scored or damaged bearings. The bore
graduations. If the fuel level is in poor area of collector
of new bearings must measure between 1.8750 and
tube, replace the fuel injector pump.
1.8760 inches. The specified bearing clearance is from