MacDon M1170 - Draining the Diesel Exhaust Fluid (DEF) Tank

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Figure 5.158: Drain Plug
3. Place a container under plug (A). The fuel tank holds 519
liters (137 gallons) total.
4. Loosen plug (A), and drain the tank.
5. Add some clean fuel to tank to flush out any remaining
contaminants.
NOTE:
Do NOT refill the fuel tank if you need to work on the
system. Refill tank when work is completed. Refer to 5.7.7
Filling Fuel Tank, page 296.
5.15.3 Draining the Diesel Exhaust Fluid (DEF) Tank
It is necessary to drain the DEF tank when the DEF is contaminated or if storing the windrower for a period greater than six
months.
WARNING
To avoid bodily injury or death from unexpected startup of the machine, always stop the engine and remove the key
from the ignition before leaving the operator’s seat for any reason.
1. Stop the engine and remove the key.
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Figure 5.159: View from beneath Tank
2. Place a drain pan under the DEF tank (B). The drain pan
should be large enough to hold 29 liters (7.5 US gallons).
IMPORTANT:
Spilled DEF must be contained and absorbed by non-
combustible absorbent material like sand and then
shovelled to a suitable container for disposal. If spilled on
tank or any surface of the vehicle, rinse thoroughly with
water as DEF is corrosive.
CAUTION
Avoid contact with eyes. In case of contact, rinse immediately
with water for 15 minutes.
3. Remove the drain plug (A) from under the tank (B)
and drain.
4. Add some distilled water to the tank (B) to flush out
remaining contaminants.
5. Drain the distilled water that was used to clean the tank.
6. Reinstall drain plug (A) into the tank (B).
7. Refill DEF tank. Refer to 5.7.8 Filling the Diesel Exhaust Fluid
(DEF) Tank, page 297.
NOTE:
Do NOT refill if storing for six months or longer.
MAINTENANCE AND SERVICING