TM 9-2320-272-24-4
5-36. FUEL INJECTION PUMP MAINTENANCE (Contd)
6.
Reverse position of fuel pump housing (1) and mount in vise.
7.
Remove six screws (9), holding brackets (19), cover (18), and seal ring (17) from fuel pump
housing (1). Discard seal ring (17).
NOTE
Cylinder number one is located at drive end of fuel pump.
8.
Rotate camshaft (16) until cylinder number one is at Top Dead Center (TDC).
Turn knurled handle (14) on tappet holder (15) fully counterclockwise.
9.
Apply GM grease to ramp (12) and guide (11) on tappet holder (15).
10.
NOTE
Tappet holder will insert only part way in when lifting tappet
number one off camshaft.
Hold tappet holder (15) with ramp (12) up and insert tappet holder (15) into side hole (10) of fuel
11.
pump housing (1).
NOTE
Pressure must be maintained on handle of tappet holder to
prevent tappet holder from popping out.
When all six tappets are lifted off the camshaft, camshaft will
rotate with little resistance.
Rotate camshaft (16) until cylinder number two is at TDC and push tappet holder (15) until tapered
12.
edge (13) on tappet holder (15) contacts fuel pump housing (1).
NOTE
Repeat steps 8 through 12 to install remaining two tappet holders.
Remove two screws (21) and seal rings (22) from fuel pump housing (1). Discard seal rings (22).
13.
CAUTION
If arbor press is used, care should be taken to prevent damage to
control rack guide pin.
14.
Remove camshaft (16), with bearing (23) and bearing shell (20), from governor end of fuel pump
housing (1).
Remove four screws (5), lockwashers (4), end plate (3), and gasket (2) from fuel pump housing (1).
15.
Discard gasket (2) and lockwashers (4).
Remove O-ring (6) and oil seal (7) from end plate (3). Discard O-ring (6) and oil seal (7).
16.
17.
Remove O-ring (8) from fuel pump housing (1). Discard O-ring (8).
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