Radiator And Oil Cooler - Jacobsen R-311T Maintenance Manual

4.21 RADIATOR AND OIL COOLER _______________________________________________

!
WARNING
To prevent serious bodily injury from hot coolant or
steam blow-out, never attempt to remove the radiator
cap while the engine is running. Stop the engine and
wait until it is cool. Even then, use extreme care when
removing the cap.
!
CAUTION
Do not pour cold water into a hot radiator. Do not
operate engine without a proper coolant mixture.
Install cap and tighten securely.
1. Check coolant level daily. Radiator should be full and
recovery bottle should be up to the cold mark.
2. Drain and refill annually. Remove the radiator cap,
open the engine block drain and the radiator drain.
Empty and clean the recovery bottle.
3. Mix clean water with ethylene glycol based anti-
freeze for the coldest ambient temperature. Read
and follow the instructions on the anti-freeze
container and engine manual.
4. Keep the hood and screen clean. Remove leaves or
grass clippings from screen daily.
5. Loosen wing nuts on side of oil cooler and tilt oil
cooler back to cleaning position.
6. Open trap door under the radiator and oil cooler,
then place a piece of cardboard, to act as a
deflector, between the radiator and oil cooler.
!
WARNING
To prevent burns, do not touch muffler or muffler
shield when opening trap door. Surface temperatures
may exceed 150° F (66° C).
MAINTENANCE
7. Use compressed air, up to 30 psi (2.06 BAR), to
clean the radiator and oil cooler fins. A special blow
gun (JAC 5098) is available through an Authorized
Jacobsen Dealer.
8. Direct air through the engine side of radiator
towards rear of mower and through rear of oil cooler
towards the front of mower.
9. Remove cardboard and return oil cooler to its
upright position. Tighten wing nuts. Clean the entire
compartment underneath the radiator and close trap
door.
10. Check and tighten the fan belt. Replace clamps and
hoses every two years.
11. If you continue to experience engine or hydraulic
system overheating, have to add coolant more than
once a month, or add more than one quart at a
time, have a authorized Jacobsen Dealer check the
cooling system.
Radiator
Direct air through
radiator from
engine side
Cardboard
Oil Cooler
Direct air through
oil cooler from
rear
Trap Door
Figure 4E
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