6-26 DK35/40/450L
615O642A
(1) Radiator Cap (2) Recovery Tank
(A) Full (B) Low
CAUTION
To avoid personal injury:
Do not remove the radiator cap
when the engine is hot. Then
loosen cap slightly to the stop the
relieve any excess pressure be-
fore removing cap completely.
1. Stop the engine and let cool down.
2. To drain the coolant, open the radia-
tor drain plug and remove radiator
cap. The radiator cap must be re-
moved to completely drain the coolant.
3. After all coolant is drained, close the
drain plug.
4. Fill with clean water and cooling sys-
tem cleaner.
5. Follow directions of the cleaner
instruction.
6. After flushing, fill with clean water
and anti-freeze until the coolant level
is just below the port.
Install the radiator cap securely.
7. Fill with coolant up to the “FULL” mark
on the recovery tank.
8. Start and operate the engine for few
minutes.
9. Stop the engine and let cool.
10.Check coolant level of recovery tank
and add coolant if necessary.
FLUSH COOLING SYSTEM AND CHANG-
ING COOLANT
If cooling water freezes, it can damage
the cylinders and radiator. It is necessary,
if the ambient temperature falls below 0°C
(32°F), to remove cooling water after
operating or to add anti-freeze to it.
1. There are two types of anti-freeze
available; use the permanent type (PT)
for this engine.
2. Before adding anti-freeze for the first
time, clean the radiator interior by pour-
ing fresh water and draining it a few
times.
3. The procedure for mixing of water and
anti-freeze differs according to the
make of the anti-freeze and the ambi-
ent temperature, basically it should be
referred to SAE J1034 standard, more
specifically also to SAE J814c.
4. Mix the anti-freeze with water, and
then fill into the radiator.
Vol %
Anti-freeze
40
50
Freezing Point
°C
-24
-37
°F
-12
-34
Boiling Point*
°C
106
108
°F
222
226
ANTI-FREEZE
Coolant capacity
7.0 (1.9 U.S.gal.)
DK35
Model
DK40/
DK450L
8.9
(2.4 U.S.gal.)
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