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

4 MAINTENANCE

4.21 RADIATOR AND OIL COOLER_______________________________________________________________

!
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.
!
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.
!
To prevent burns, do not touch muffler or muffler shield when
opening trap door. Surface temperatures may exceed 150° F (66°
C).
24
WARNING
CAUTION
WARNING
7. Use compressed air, up to 30 psi (206 kPa), 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