TM 5-3810-300-24&P-3
14.3 LIMITING SPEED GOVERNOR ADJUSTMENT
gage as shown in Fig 2 If the gap set Pag ting is
incorrect, loosen the lock nut and adjust the gap
adjusting screw.
9
Hold the gap adjusting screw and tighten the lock
nut.
10
Recheck the governor gap, with the engine
operating between 800 and 1000 rpm, by placing a
screw driver between the gap adjusting screw and
the governor housing and manually forcing the gap
closed
If the setting is correct, the .0015"
movement can be seen by placing a few drops of oil
into the governor gap and pressing a screw driver
against the gap adjusting screw. Movement of the
cap toward the plunger will force the oil from the
gap in the form of a small bead.
11
Stop the engine and install the fuel rod between the
differential lever and the control tube lever.
12
Install the governor cover and lever assembly.
Fig. 3 - Positioning No. I Injector Rack Control Lever
Position Injector Rack Control Levers Engines Not
Using a Fuel Modulator
1
With the engine stopped, remove the two attaching
bolts and withdraw the governor high speed spring
The position of the injector racks must be correctly set in
retainer cover.
relation to the governor. Their position determines the
amount of fuel injected into each cylinder and ensures
2
Back out the buffer screw until it extends
equal distribution of the load.
approximately 5/8" from the lock nut (Fig
Properly positioned injector rack control levers will result
3
Start the engine and loosen the idle speed adjusting
in the following: Speed control lever at the maximum
screw lock nut and adjust the idle screw -to obtain
speed position.
the desired idle speed (Fig 2)
Hold the screw
and tighten the lock nut to retain the adjustment
Governor low speed gap closed.
The recommended idle speed is 450 rpm for
double weight governors, but may vary with special
High speed spring plunger on the seat in the governor
engine applications.
control housing.
4
Stop the engine and remove the governor cover
Injector racks in the full-fuel position.
and lever assembly.
Adjust the No. 1 injector rack control lever, Fig 3, first to
5
Clean and remove the valve rocker cover.
establish a guide for adjusting the remaining injector rack
control levers.
6
Remove the fuel rod from the differential lever and
the injector control tube lever (Fig 3).
1
Disconnect any linkage attached to the governor
speed control lever.
7
Start and run the engine between 800 and 1000
rpm by manual operation of the control tube lever.
2
Loosen the idle speed adjusting screw lock nut and
back out the idle speed adjusting screw until 1/2" of
CAUTION:
Do
not
overspeed
the
the threads project from the lock nut when the nut is
engine.
against the high speed plunger (Fig 2).
8
Check the gap between the low speed spring cap
and the high speed plunger with a .0015" feeler
Page 387
TM 5-3810-300-24&P-3
14.3 LIMITING SPEED GOVERNOR ADJUSTMENT
