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18 109821_0508
(3) Coolant Change
The coolant must be changed at intervals of 6 months.
Degraded or dirty coolant will lead to engine overheating.
Coolant draining
1. Remove the radiator cap.
Open the drain cock at the radiator lower part to drain the
coolant from the radiator.
WARNING: Never remove the radiator filler cap
while the engine is still hot.
Allow the engine to cool before removing the radi-
ator cap.
Cover the cap with a cloth, then turn it slowly to
release the internal pressure.
2. Drain the coolant from the engine by loosening the water
drain cock on the right hand of cylinder body.
Filling with coolant
1. Close or tighten the coolant drain plug.
Using a 50/50 mixture of Ethylene Glycol and water
(Refer to section 8.2) fill the radiator with the coolant
until the level comes up to the filler port neck.
2. Fill gradually to prevent air entry.
Coolant volume (Engine only) :
Refer to "Main Data Specifications"
3. After filling operate the engine about five minutes at a
low idle speed to purge the air from the system. The
coolant level will drop.
Stop the engine and refill with the coolant.
(4) Cleaning Outside of Radiator
Mud or dried grass caught between radiator fins will block
the air flow, resulting in lower cooling efficiency.
Clean the radiator fins with compressed air.
For the cleaning interval, refer to the instruction manual
prepared by the equipment manufacturer.
If the fins are clogged, however, clean them at any time. If
the fins are deformed, repair or replace the radiator.
(5) Cooling System Circuit Cleaning
When the cooling system is fouled with water scale or
sludge particles, cooling efficiency will be reduced.
Periodically flush the system with a cleaner.
Cooling system cleaning interval; Every 12 months.
7.3 Fuel System
The fuel injection pump and fuel injection nozzles are pre-
cisely manufactured, and therefore, using fuel which contains
water or dust particles will result in either injection pump
plunger seizure or injection nozzle seizure. A fouled fuel filter
element will lead to decreased engine output.
Perform inspection and maintenance periodically as fol-
lows:
(1) Removal of Water from the Fuel
If the water reaches the fuel filter element bottom, follow
the procedure below to drain the water.
NOTE: Does not apply to Hustler Diesel Z equipment.
Loosen
Alternator
Water
Drain
Cock