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Section 7
37
2. Clean and remove the check plug from the side of
the gearbox (See Figure 7-12). Visually check that
the lubricant level is up to the bottom edge of the
check plug hole. If lubricant is low, add SAE 80/90
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.
B. Changing Lubricant
The lubricant in the cutter deck gearbox should be
changed 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 and drain the lubricant into
the container and properly discard it.
3. Re-install the drain plug and add EP-80/90 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.
WARNING:
To avoid burns, always allow the engine to
cool before removing the radiator cap.
Fill to Bottom of
Filler Neck
030467-13
Figure 7-13 Coolant Level in Radiator
2. Visually check the coolant level. The coolant level
should be up to the bottom of the filler neck as
shown in figure 7-13. Add a mixture of coolant and
soft water as needed.
-NOTE-
Refer to the coolant manuafacturer's instruc-
tions for the proper coolant mixture ratio.
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 op-
eration 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.
To avoid personal injury, always wear safety
glasses when using compressed air.
CAUTION: