2.16
MAINTENANCE
© Copyright 2011 Polaris Sales Inc.
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
Liquid Cooling System Overview
The engine coolant level is controlled or maintained by the
recovery system. The recovery system components are
the recovery bottle, radiator filler neck, radiator pressure
cap and connecting hose.
As coolant operating temperature increases, the
expanding (heated) excess coolant is forced out of the
radiator past the pressure cap and into the recovery bottle.
As engine coolant temperature decreases the contracting
(cooled) coolant is drawn back up from the tank past the
pressure cap and into the radiator.
Some coolant level drop on new machines is normal as the
system is purging itself of trapped air. Observe coolant
levels often during the break-in period.
Overheating of engine could occur if air is not fully purged
from system.
Polaris Premium 60/40 is already premixed and ready to
use. Do not dilute with water.
Coolant Strength / Type
Test the strength of the coolant using an antifreeze
hydrometer.
• A 50/50 or 60/40 mixture of antifreeze and distilled
water will provide the optimum cooling, corrosion
protection, and antifreeze protection.
• Do not use tap water, straight antifreeze, or
straight water in the system. Tap water contains
minerals and impurities which build up in the
system.
• Straight water or antifreeze may cause the system
to freeze, corrode, or overheat.
Cooling System Hoses
1. Inspect all hoses for cracks, deterioration, abrasion
or leaks. Replace if necessary.
2. Check tightness of all hose clamps.
Polaris 60/40 Anti-Freeze/ Coolant
(PN 2871323)
Do not over-tighten hose clamps at radiator,
or radiator fitting may distort,
causing a restriction to coolant flow.
Radiator hose clamp torque is 36 in. lbs. (4 Nm).
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