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Page Title:
Table 4-2. Engine Start-up Performance Checks |
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 TM 55-4920-405-13&P
Table 4-1. Preliminary Performance Checks - Continued
Normal
Abnormal
Indication
Indication
Corrective
Action
Step
Action
RESERVOIR valve binds
Replace or repair as necessary.
11
Set RESERVOIR
RESERVOIR
or cannot be turned be-
valve (15, figure
valve turns
2-1) to IN.
freely.
cause it is defective.
Replace FUEL LEVEL gage.
FUEL LEVEL
FUEL LEVEL gage
Fill fuel tank.
does not indicate, or
gage (4, figure
2-1) reads full
indicates incorrectly.
when IGNITION
SWITCH (2, fig-
ure 2-2) is set to
ON.
Replace defective hose assem-
13
Hose assembly couplings
Hose assembly
Connect hose as-
blies or couplings.
couplings lock to
semblies between
cannot be attached to
test stand or system to
couplings on test
test stand and sys-
be tested because of de-
stand and system
tem that is to be
fective hose assemblies
to be tested.
tested.
or defective coupling on
test stand.
Table 4-2. Engine Start-up Performance Checks
Abnormal
Normal
Corrective
Action
Indication
Indication
Step
Action
Replace switch.
Positive action ground
Positive action
Make sure HIGH
1
switch does not pull out
ground switch
PRESS BYPASS
and engine will not start
pulls out and re-
VALVE control (19,
because switch or mag-
mains out.
figure 2-1) is set to
neto assembly is
OPEN. Pull out
defective.
positive action
ground switch (3,
a. Adjust, repair or replace.
CHOKE control cannot be
2
Pull CHOKE con-
CHOKE control
b . Adjust or replace.
pulled, can be pulled
operates freely.
trol (1, figure 2-2)
out only part way, or
to full out position,
binds. Probable cause:
then reset it to
about midway.
a . Defective carburetor.
b. Stuck cable to car-
buretor linkage, or
stuck carburetor
linkage.
a . Adjust or replace.
THROTTLE cannot be
3
Pull THROTTLE (3,
T H R O T T L E Op-
b . Repair or replace.
pulled out and locked.
erates freely
figure 2-2) to full
Probable cause:
out position, and
and can be locked.
reset to about one-
a. Jammed throttle
quarter out position.
cable or carburetor
Twist to right to
linkage.
lock, and release.
b . Defective carburetor.
Replace switch.
IGNITION SWITCH can-
IGNITION SWITCH
4
Set IGNITION
not be set to ON because
can be set to ON
SWITCH (2, fig-
it is defective.
and remains at
ure 2-2) to ON.
ON when
released.
4-3
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