Northern Lights OM150C12 Operator's Manual - page 22
20
OM150C12 11/11
IMPORTANT
1. DO NOT use methyl alcohol or methoxy propanol
base EGC. These concentrates are not compatible
with chemicals used in supplemental coolant
additives. Damage can occur to rubber seals on
cylinder liners which are in contact with coolant.
2. DO NOT use an EGC containing sealer or stop-leak
additives.
3. DO NOT use EGC containing more than 0.1%
anhydrous metasilicate. This type of concentrate,
which is intended for use in aluminum engines, may
cause a gel-like deposit to form that reduces heat
transfer and coolant flow. Check container label or
consult with supplier.
SUPPLEMENTAL COOLANT ADDITIVE (SCA)
CAUTION: Supplemental coolant additive contains
alkali. Avoid contact with eyes. Avoid contact with
skin. Do not take internally. In case of
contact immediately wash skin with soap and water.
For eyes, flush with large amounts of water for at
least 15 minutes. Call a physician. KEEP OUT OF
REACH OF CHILDREN. Follow all warnings on the
container.
1. Important heat exchanger cooled engines
Additional SCA's should NOT be added to the
mixture of EGC/H
2
0 on initial fill up of engines
with a coolant conditioner-filter. A high SCA
concentration will result and can cause
silicate-dropout. When this happens, a gel-type
deposit is created in the cooling system which
retards heat transfer and coolant flow.
2. If additional SCA's are needed, prepare a mixture
of 50% quality water and 50%EGC (antifreeze).
Add liquid SCA at a rate of 3%, by volume.
Example: 30 mL of SCA per liter of H
2
O/EGC
mixture (1.0 fl oz of SCA per qt of H
2
O/EGC).
Add the resulting mixture to the cooling system in
quart increments. Run the engine for 2 hours and
retest the coolant. Continue process until SCA
concentration meets recommended levels.
3. SCA is available from your Northern Lights dealer
in the following sizes.
Pint - Part Number...............20-00002
1/2 gallon - Part Number.....20-00003
4. DO NOT use any coolant system additives
containing soluble oil.
Servicing
COOLANT TESTING
1. Coolant test kits are available to allow on-site evalu-
ation of the coolant condition.
2. The kits use small strips of paper which are dipped
into the coolant. The paper changes color and
indicates the SCA concentration. It also indicates the
amount of EGC (antifreeze).
3. Test kits are available through your Northern Lights
or Lugger Dealer.
4 Pack - Part Number.......................20-00005
50 Pack - Part Number.....................20-00010
SP15. CHECKING COOLANT LEVEL
CAUTION: The cooling water in the engine reaches
extremely high temperatures. You must use
extreme caution when working on hot engines to
avoid burns. Allow the engine to cool before working
on the cooling system. Open the filler
cap carefully, using protective clothing when the
engine is warm.
1. Check the coolant level each day before starting the
engine.
2. Remove the pressure cap from the expansion tank
and check water level. In order to give the coolant
an opportunity to expand, the level should be about
1 3/4 in. (4-5 cm) below the filler cap sealing surface
when the engine is cold. When filling with
coolant, the venting cock on top of the turbocharger
(for engines fitted with turbocharger) should be
opened to ensure that no air pockets form in the
cooling system.
2. The pressure valve in the filler cap releases when the
pressure is approximately 7 PSI (0.5 bar). Use a cap
pressure tester to check cap if you suspect it is faulty.
4. The makeup coolant, added to compensate for loss
or leaks, must meet engine coolant requirements
outlined in previous section.
SP16. FLUSHING THE COOLING SYSTEM
CAUTION: The cooling water in the engine reaches
extremely high temperatures. You must use extreme
caution when working on hot engines to avoid burns.
Allow the engine to cool before working on the
cooling system. Open the filler cap carefully, using
protective clothing when the engine is warm.