1-21
1-21
THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)
THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)
P
Prro
ob
blle
em
m
C
Ca
au
us
se
e
C
Co
orrrre
ec
cttiio
on
n
27.
27. Engin
Engine wil
e will not
l not
reach rated speed
reach rated speed
(rpm)
(rpm)
1.
1. Electroni
Electronic f
c fault c
ault codes ar
odes are act
e active.
ive.
2.
2. Engin
Engine powe
e power outp
r output is
ut is low
low..
3.
3. Fuel
Fuel grade i
grade is not c
s not corr
orrect o
ect or fuel
r fuel
quality is poor.
quality is poor.
4.
4. Fuel
Fuel suction
suction line
line is r
is restric
estricted.
ted.
5.
5. Over
Overhead adj
head adjustm
ustments ar
ents are inco
e incor-
r-
rect.
rect.
1.
1. Re
Refer
fer to
to the
the
QSM11 Fault Code
QSM11 Fault Code
Information
Information
chart in this section.
chart in this section.
2.
2. Ref
Refer to Pr
er to Problem
oblem 18. of t
18. of this t
his trou-
rou-
bleshooting chart.
bleshooting chart.
3.
3. Ref
Refer to Co
er to Corre
rrecti
ction 1. of Pr
on 1. of Proble
oblem
m
17. of this troubleshooting chart.
17. of this troubleshooting chart.
4.
4. Chec
Check fuel in
k fuel inlet fo
let for rest
r restric
riction
tion..
5.
5. Meas
Measure an
ure and adjus
d adjust the ov
t the overhe
erhead
ad
settings
settings.
. Refer to t
Refer to the Cumm
he Cummins
ins
Engine Operation and Mainte-
Engine Operation and Mainte-
nance Manual.
nance Manual.
6.
6. Cont
Contact a C
act a Cumm
ummins A
ins Author
uthorized
ized
repair facility.
repair facility.
28.
28. Engin
Engine wil
e will not
l not
shut off
shut off
1.
1. Ignition
Ignition swit
switch ci
ch circuit
rcuit is m
is malfunc-
alfunc-
tioning.
tioning.
2.
2. Engin
Engine is r
e is runni
unning on fum
ng on fumes dr
es drawn
awn
into air intake.
into air intake.
1.
1. Check
Check ignition
ignition key s
key switch
witch circ
circuit.
uit.
NOTE:
NOTE:
Should an electrical mal-
Should an electrical mal-
function prevent engine shutdown,
function prevent engine shutdown,
turn the master disconnect switch
turn the master disconnect switch
off.
off.
2.
2. Loca
Locate and i
te and isol
solate the s
ate the sourc
ource of
e of
fumes.
fumes.
29.
29. Fuel consum
Fuel consumptio
ption
n
excessive
excessive
1.
1. Oil
Oil leve
level i
l is to
s too hi
o high.
gh.
2.
2. Intake
Intake air r
air restric
estriction is
tion is excessi
excessive.
ve.
3.
3. Fue
Fuel l lea
leaks
ks..
1.
1. Chec
Check oil
k oil dips
dipstic
tick and oi
k and oil pan
l pan
capacity
capacity.
. Adjust to th
Adjust to the proper oil
e proper oil
level.
level.
2.
2. Visual
Visually ins
ly inspect air
pect air filter
filter and restr
and restric-
ic-
tion indicator
tion indicator.
. Replace air fi
Replace air filter if
lter if
necessary.
necessary.
3.
3. Vis
Visuall
ually chec
y check fuel s
k fuel syst
ystem and
em and
supply for leaks.
supply for leaks.
4.
4. Cont
Contact a C
act a Cumm
ummins A
ins Author
uthorized
ized
Repair Facility.
Repair Facility.
30.
30. Fuel i
Fuel in coola
n coolant
nt
1.
1. Bulk
Bulk cool
coolant
ant supp
supply
ly cont
contami
aminated
nated.
.
1.
1. Chec
Check
k cool
coolant
ant supp
supply
ly.
. Dra
Drain
in cool
cool--
ant and replace with non-contami-
ant and replace with non-contami-
nated coo
nated coolant.
lant. Replace
Replace coolant
coolant
filter.
filter.
2.
2. Cont
Contact a C
act a Cumm
ummins A
ins Author
uthorized
ized
Repair Facility.
Repair Facility.
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