(
MAINTENANCE/SERVICE
Engine Cooling System
CHANGING COOLANT
Coolant should
be
removed,
and
the system
flushed
and
filled
with new coolant every 2
yea
rs.
Procedure
:
A
CAUTION: To avoid personal
injury
from
hot
coolant.
do
not
turn
radiator cap until engine cools.
Turn the cap
to
the
first
notch
to
relieve pressure before removing
cap completely.
1. With engine cool and approximately level,
remove radiator
cap
.
NOTE: A drain
pan
with a capacity
of
8 U.S.
gallons
(
30
lilres)
wilt
be
adequate.
2.
Remove
drain
plug
(B)
from
engine
block.
3.
Open
radiator
drain
valve
(C)
.
Use
a deflector
if
desi
red
to prevent coolant
run
ni
ng
onto
frame.
4.
When
system
is
drained,
replace
drain
plug
in
block
and
close radiator
drain
valve.
5.
Fill
system with clean water
and
replace
radiator
cap.
6.
Turn
heater switch
in
cab
ON
and
l
eave
it
on
until flushing is complete.
7.
Start
and
run
engine
until
normal operating
temperature is reached.
8. Stop engine
and
drain water out before rust or
sediment settles.
BLOCK
DRAIN
-
DIE
SEL ENGINE
RADIATOR ORAIN
9.
Close
drain valves
and
fill system
with
a solution of
clean
water
and
a heavy duty radiator cleaner.
Follow instructions
provided
with
cleaner.
10
. After us
ing
cleaner soluti
on
, again
flush
system
with
clean
water.
In
spect radiator, hoses a
nd
fittings
for
leaks.
11
.
Close
drain valves
and
fill system
with
a 50/50 mix of
ant
i
~freeze
and
clean, soft water.
SYSTEM CAPACITY -
Diesel Engine: 4.8
U.S
. gallons (18 litres)
Anti-freeze Specification: Ethylene-glycol or
propylene-glycol fully formulated,
co
ntaining a pre-charge
supplemental
coo
lant additive (SeA)
and
meeti
ng
AS
TM
De
signation: D 4985.
71
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