TM 10-4320-344-24
3.8.8 Governor Maintenance, Model US636HCCD-1.
(Continued)
a.
Remove two screws (Figure 3-23, 1), lock washers (2), and tag and remove two
wires (3) from governor (4).
Discard lock washers (2).
Measure length of governor linkage before removing governor, to facilitate
installation and adjustment procedures.
b .
Remove nut (5) and bolt (6) that secure bearing (7) to fuel injection pump
l e v e r ( 8 ).
c .
Measure length of governor linkage assembly.
d .
Remove three mounting bolts (9), lock washers (10), and mounting bracket (11)
from engine (12). Discard lock washers (10).
e .
Remove four mounting bolts (13), lock washers (14), and governor (4) from
m o u n t i n g D i s c a r d l o c k w a s h e r s ( 1 4 ) .
3.8.8.2 Repair.
a .
Inspect all components and mounting hardware for damage.
b.
If governor (4) is damaged or requires repair return it to the manufacturer.
c .
Replace all defective components.
3.8.8.3 Installation.
a.
Position qovernor (4) on mountinq bracket (11) and secure with four new lock
washers (14) and mounting bolts (13).
b .
Position mounting bracket (11) on engine (12) and secure with three new lock
washers (10) and mounting bolts (9).
Ensure length of governor linkage assembly meets measurement taken during
removal.
c .
Align bearing (7) with fuel injection pump lever (8) and secure with bolt (6)
and nut (5).
d .
Refer to tags, position two wires (3) against governor (4), and secure with
two new lock washers (2) and screws (1). Remove and discard tags.
3.8.8.4 Calibration and Adjustment.
a.
Tag and disconnect wire from pin 16 of process control.
b .
Turn on supply to both controls, and start engine, reference TM 10-4320-344-
10, with mode select switch on control panel set to "MANUAL" and speed
potentiometer on control panel set to "IDLE”.
c .
Slowly increase control panel speed potentiometer until fully clockwise. Then
adjust speed potentiometer 8290-040 so that engine is operating at 2,350-2,400
RPM .
d.
Adjust "GAIN” and “STABILITY” potentiometers to smooth out engine operation.
3-56
NOTE
NOTE
