MAINTENANCE 8
39
8.19 RADIATOR _______________________________________________________________
Check coolant level daily. Radiator should be full and
recovery bottle should be up to the cold mark.
Drain and refill annually. Remove the radiator cap, open
the engine block drain and the radiator drain. Empty and
clean the recovery bottle.
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.
Keep radiator air passages clean. Use compressed air
(30 psi (2.1 BAR) maximum) to clean the fins.
Check and tighten the fan belt. Replace clamps and
hoses every two years.
If you 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.
8.20 BACKLAPPING____________________________________________________________
Check the reel and bedknife to determine if backlapping
or grinding will restore the cutting edge.
If wear or damage is beyond the point where the cutting
edges can be corrected by the lapping process, they
must be reground.
To Backlap:
1.
Adjust bedknife to reel as described in Sections 9.2
and 9.3.
2.
Obtain the mechanics (Backlap) key.
a.
Make absolutely certain your feet and clothing
are far away from the reel.
b.
Make sure the parking brake is ENGAGED, reel
levers are OFF, backlap switch is OFF, and the
traction lever is in Neutral.
3.
Turn all three backlapping knobs counterclockwise
to open.
4.
Turn backlap key to backlap position and start the
engine. Adjust throttle to minimum RPM.
a.
Engage lever for reel to be backlapped. Keep the
other levers in the OFF position.
b.
Slowly close backlap knob until reel turns at
desired speed.
c.
Apply lapping compound with a long handle
brush to high spots first then along entire length
of the reel.
d.
Continue lapping and at the same time make a
slight adjustment on the reel until there is a
uniform clearance along the full length of the
cutting edges.
e.
When the blades have been evenly honed,
carefully and thoroughly clean off the remaining
lapping compound from the reels and bedknife
before running the reel in forward direction.
5.
Repeat the entire process on the other reels.
6.
Disengage reel levers, stop the engine, remove and
store the mechanics key.
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.
!
!
DANGER
To prevent injury, keep hands, feet, and clothing away
from rotating reels.
When the backlap switch is in the REVERSE position,
the reels will turn whether mowers are up or down and
the operator is on or off the seat.
Carbon Monoxide in exhaust fumes can be fatal when
inhaled, never operate an engine without proper
ventilation.
!
DANGER
When the mechanics switch is in the BACKLAP
position, the reels will turn whether mowers are up or
down and the operator is on or off the seat.
!
