Section 7
33
1. Loosen the radiator cap, and open the radiator drain
valve. Open the engine block drain valve located on
the crankcase side of the engine. Drain the coolant
into a suitable container. Drain and clean the overflow
bottle.
2. Close both drain valves securely.
3. Fill the radiator and cooling system with a mixture of
clean water and ethylene glycol based anti-freeze
(capacity of system - approx. 3 quarts). Mix the anti-
freeze for your coldest ambient temperature following
the manufacturer's instructions.
4. If you add coolant more than once a month, or add
more than one quart at a time, have a Scag dealer
check the cooling system.
7.7 ENGINE AIR CLEANER
A. Emptying Air Cleaner Dust Cup
After every 8 hours or daily, empty the air cleaner dust
cup. Squeeze the dust cup (Figure 7-8) to remove large
particles of dust and dirt.
B. Cleaning and/or Replacing Air Cleaner
Element
For any air cleaner, the operating environment dictates the
air cleaner service periods. Inspect and clean the air cleaner
element after every 100 hours of operation or bi-weekly,
whichever occurs first and replace the element if required.
-NOTE-
In extremely dusty conditions it may be nec-
essary to check the element once or twice
daily to inhibit engine damage.
1. Remove the cover wing nut and remove the cover from
the air cleaner.
2. Remove the wing nut securing filter the air cleaner
CAUTION:
element and remove the element (Figure 7-8).
Wing Nut
Air Filter Element
Air Cleaner Dust Cup
Wing Nut
To prevent personal injury, always wear safety
glasses when using compressed air.
Figure 7-8 Air Cleaner
3. When dust adheres to the element, clean the
filter element with compressed air. Use compressed
air pressure of not more than 99 psi to clean the element.
Rotate the element while directing the stream of air to
the inside of the element.
4. When carbon or oil adheres to the element, soak the
element in detergent for 30 minutes, then wash several
times in water, rinse with clean water and allow to air
dry. After the element has fully dried, inspect the inside
of element with a light and check for damage. (Refer
