Polaris 2015 Ranger Diesel / Crew Diesel - Manual (Page 76)

74
MAINTENANCE
Cooling System
The engine coolant level is controlled or maintained by the recovery system. The recovery
system components are the overflow 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 overflow 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 vehicles is normal as the system is purging itself of trapped
air. Observe coolant levels and maintain as recommended by adding coolant to the overflow
bottle.
Adding or Changing Coolant
POLARIS recommends the use of POLARIS Antifreeze 50/50 Premix. This antifreeze is
already premixed and ready to use. Do not dilute with water. See page 104 for the part
numbers of POLARIS products.
To ensure that the coolant maintains its ability to protect the engine, we recommend that the
system be completely drained every five (5) years and fresh Antifreeze 50/50 Premix added.
Any time the cooling system has been drained for maintenance or repair, replace the coolant
with fresh Antifreeze 50/50 Premix.
Radiator and Cooling Fan
Always check and clean the screen and radiator fins at the intervals outlined in the Periodic
Maintenance Chart beginning on page 65. Do not obstruct or deflect air flow through the
radiator by installing unauthorized accessories in front of the radiator or behind the cooling
fan. Interference with the radiator air flow can lead to overheating and consequent engine
damage.
NOTICE: Washing the vehicle with a high-pressure hose could damage the radiator fins and impair
the radiator's effectiveness. Using a high-pressure system is not recommended.