Scag Power Equipment STT - Manual (Page 42)

38
Section 7
3. Replace the radiator cap. Push down on the cap and
turn clockwise until it stops.
-NOTE-
The cooling system should be flushed and the
coolant replaced every 500 hours of operation
or annually. See your Scag dealer for proper
coolant replacement.
B. Cleaning the Radiator Debris Screen
After each day of operation, remove and clean the
radiator debris screen.
1. Pull the debris screen up to remove.
2. Clean the debris screen with compressed air or a
water hose.
-NOTE-
Check the radiator for excessive debris and
clean with compressed air. Never spray a hot
engine with water, use only compressed air to
remove debris.
3. Re-install the debris screen to the radiator.
To avoid personal injury, always wear safety
glasses when using compressed air.
CAUTION:
B. Changing Lubricant
The lubricant in the cutter deck gearbox should be
changed after every 500 hours of operation or yearly,
whichever occurs first.
1. Place a suitable container beneath the cutter deck
gearbox and locate the gearbox drain plug.
2. Remove the drain plug, drain the lubricant into the
container and properly discard it.
3. Re-install the drain plug and add SAE 80W90
lubricant through the check plug hole in the gearbox
until it is level with the bottom of the check plug hole.
Install the check plug and tighten securely.
7.12 COOLING SYSTEM
A. Checking Coolant Level
The coolant level should be checked before each day of
operation.
1. Remove the radiator cap by turning it slowly
counterclockwise to the first stop and allow any
pressure to be released. Push down on the cap and
turn counterclockwise to remove.
2. Visually check the coolant level. The coolant level
should be up to the bottom of the filler neck as shown
in Figure 7-10. Add a mixture of coolant and soft
water as needed.
-NOTE-
Refer to the coolant manufacturer's instructions
for the proper coolant mixture ratio.
WARNING:
To avoid burns, always allow the engine to
cool before removing the radiator cap.
Fill to Bottom of
Filler Neck
030467-13
Figure 7-10 Coolant Level