the engine firing order.
During
(3)
Remove the timing hole cover (21, fig.
injection the cylinder which has the
nozzle valve sticking in the open
(4)
Mount the fuel injection pump and
position, the fuel rushes into, that
governor assembly on the drive shaft
cylinder with no restriction, causing a
assembly alining the pin in the drive
scavenging effect in the pump and a
shaft with the locating hole in the
void which cannot be filled to provide
distributor rotor, and install the mounting
opening pressure to the following
hardware fingertight as instructed on
nozzle. Therefore no combustion can
take place in the cylinder with the good
(5)
Rotate the pump assembly, first
nozzle.
clockwise and then counterclockwise
(2)
Place the throttle control in the idle
until the fuel injection pump timing
position and check the engine speed on
marks are alined, and tighten mounting
the tachometer. The correct idle speed
hardware.
is 600 rpm.
Note.
Turn the crankshaft 2
(3)
Loosen the locknut and turn the idle stop
revolutions and check timing marks.
screw (fig. 16) clockwise to increase
Adjust if necessary.
speed or counterclockwise to decrease
(6)
Install the flywheel and pump timing
speed, Tighten the locknut when correct
hole covers.
engine speed is attained.
(7)
Install the fuel injection lines, throttle
e.
High Speed Adjustment.
control cable and electrical leads (TM 5-
(1)
Start the engine and operate at no load
3820-220/2).
until normal operating temperature is
d.
Idle Speed Adjustment.
attained (TM 5-3820-205-10/2).
(1)
Start the engine and operate at no load
(2)
Place the throttle control in the high
until normal operating temperature is
speed position and check the engine
attained (TM 5-3820-510-/2).
speed on the tachometer. The correct
engine speed is 1,400 rpm.
Note. A characteristic of the Roosa-
Master fuel injection pump is that if
(3)
Loosen the locknut and turn the high
engine misfiring occurs, and it is
speed stop screw (fig. 16) clockwise to
traced to a certain cylinder in which no
decrease or counterclockwise to
combustion is taking place, the cause
increase speed. Tighten the locknut
may be a nozzle valve sticking open in
when correct engine speed is attained.
Section IX. INJECTION PUMP DRIVE SHAFT AND DRIVE GEAR ASSEMBLIES
b.
Disassembly.
68.
General
(1)
Refer to figure 18 and disassemble the
The injection pump drive gear assembly is mounted
injection pump drive shaft assembly.
on the back of the front plate at the rear of the timing gear
cover. The drive gear assembly is geared to the camshaft
Note. Remove the shaft (7) with the
timing gear.
bearing (8) assembled, and remove the
Inside the drive gear assembly a pinion drives an internal-
bearing from the shaft.
tooth gear that is connected to the drive shaft assembly that
(2)
Refer to figure 19 and disassemble the
drives the fuel injection pump and governor assembly.
injection pump drive gear assembly.
69.
Injection Pump Drive Shaft and Drive Gear
Note. Remove the shaft assembly (6),
Assemblies Removal and Disassembly
bearing (7), spacer (8), bearing (9), and
a.
Removal.
washer (10) as an assembly. Remove
the bearing (7), spacer (8), bearing (9),
(1)
Remove the fuel injection pump and
and washer (10) from the shaft
governor assembly (par. 65).
(2)
Refer to figure 16 and remove the
injection pump drive gear and drive
shaft from the engine.
AGO 3456A
48
