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

4 MAINTENANCE

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).
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.
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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