1-13
1-13
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
8.
8. Coo
Coola
lant
nt los
loss -
s -
External
External
(Continued)
(Continued)
5
5.
. E
En
ng
giin
ne
e iis
s o
ov
ve
errh
he
ea
attiin
ng
g.
.
5
5.
. R
Re
effe
er
r tto
o P
Prro
ob
blle
em
ms
s 9
9.
. a
an
nd
d 1
10
0.
. o
of
f
this troubleshooting chart.
this troubleshooting chart.
6.
6. Cont
Contact a C
act a Cumm
ummins A
ins Author
uthorized
ized
Repair Facility.
Repair Facility.
9.
9. Cool
Coolant
ant temp
tempera-
era-
ture above normal
ture above normal
(gradual overheat)
(gradual overheat)
1.
1. Cool
Coolant l
ant level
evel is l
is low
ow..
2.
2. Char
Charge air cool
ge air cooler fins
er fins, radia
, radiator fin
tor fins,
s,
or air conditioner condenser fins
or air conditioner condenser fins
are damaged or obstructed with
are damaged or obstructed with
debris, insects, dirt, etc.
debris, insects, dirt, etc.
3.
3. Radi
Radiator h
ator hoses
oses are c
are colla
ollapsed
psed,,
restri
restricted or
cted or leaking.
leaking.
4.
4. Fan dr
Fan drive be
ive belt or w
lt or water pu
ater pump bel
mp belt is
t is
loose.
loose.
5.
5. Inco
Incorre
rrect
ct oil
oil lev
level.
el.
6.
6. Cool
Cooling fa
ing fan shr
n shroud is
oud is dama
damaged.
ged.
7.
7. Radi
Radiator c
ator cap is i
ap is incor
ncorrec
rect or
t or
defective.
defective.
8.
8. Overconc
Overconcentration
entration of
of antifreez
antifreeze
e
and / or supplemental coolant addi-
and / or supplemental coolant addi-
tives.
tives.
9.
9. Defe
Defecti
ctive w
ve water
ater pump
pump..
10.
10. Defecti
Defective therm
ve thermostat.
ostat.
1.
1. Insp
Inspect t
ect the engi
he engine and co
ne and coolin
oling sys
g sys--
tem for ex
tem for external leak
ternal leaks.
s. Repair as
Repair as
required.
required. Add coolant
Add coolant as requi
as required.
red.
2.
2. Insp
Inspect th
ect the charge ai
e charge air cool
r cooler
er, air
, air
conditioner condenser
conditioner condenser,
, and
and radiator
radiator
fins.
fins. Clean or r
Clean or repair as r
epair as required.
equired.
3.
3. Insp
Inspect an
ect and repai
d repair radi
r radiator ho
ator hoses
ses..
4.
4. Chec
Check bel
k belt tens
t tension and t
ion and tight
ighten if
en if
necessary.
necessary.
5.
5. Add or d
Add or drai
rain engin
n engine oil a
e oil as req
s requir
uired.
ed.
6.
6. Insp
Inspect s
ect shroud
hroud; repa
; repair or r
ir or replac
eplace.
e.
7.
7. Repl
Replace wi
ace with cor
th correct r
rect radiat
adiator cap
or cap
(15 psi).
(15 psi).
8.
8. Use t
Use the cor
he correc
rect anti
t antifre
freeze con
eze con--
centration (refer to the engine op-
centration (refer to the engine op-
eration and maintenance manual).
eration and maintenance manual).
9.
9. Repl
Replace
ace wate
water
r pump
pump..
10. Replace
10. Replace thermost
thermostat.
at.
11. Contact a Cummins Authorized
11. Contact a Cummins Authorized
Repair Facility.
Repair Facility.
10.
10. Cool
Coolant tempera
ant tempera--
ture above normal
ture above normal
(sudden overheat)
(sudden overheat)
continued
continued
1.
1. Electroni
Electronic f
c fault c
ault codes ar
odes are act
e active.
ive.
2.
2.
Coolan
Coolant temperat
t temperature sensor mal-
ure sensor mal-
function.
function.
3.
3. Cool
Coolant l
ant level
evel is l
is low
ow..
4.
4. Radi
Radiator h
ator hoses
oses are c
are colla
ollapsed
psed,,
restri
restricted, or
cted, or leaking.
leaking.
5.
5. Fan dr
Fan drive b
ive belt
elt is b
is broke
roken.
n.
6.
6. Char
Charge air cool
ge air cooler fins
er fins, radia
, radiator fin
tor fins,
s,
or air conditioner condenser fins
or air conditioner condenser fins
are damaged or obstructed with
are damaged or obstructed with
debris, insects, dirt, etc.
debris, insects, dirt, etc.
7.
7. Radi
Radiator c
ator cap is inc
ap is incorr
orrect or def
ect or defec-
ec-
tive.
tive.
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.
Check / clean
Check / clean sensor and
sensor and cool-
cool-
ant passage.
ant passage.
3.
3. Insp
Inspect f
ect for ex
or extern
ternal le
al leaks on
aks on
engine and radiator, and make
engine and radiator, and make
repairs.
repairs.
4.
4. Insp
Inspect an
ect and repai
d repair radi
r radiator ho
ator hoses
ses..
5.
5. Repl
Replace
ace dri
drive
ve belt
belt..
6.
6. Insp
Inspect th
ect the charg
e charge air cool
e air cooler
er, air
, air
conditioner condenser
conditioner condenser,
, and
and radiator
radiator
fins.
fins. Clean or r
Clean or repair as r
epair as required.
equired.
7.
7. Repl
Replace wi
ace with cor
th correct r
rect radiat
adiator cap
or cap
(15 psi).
(15 psi).
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