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8.19 BACKLAPPING____________________________________________________________
!
WARNING
To prevent injury, keep hands, feet, and clothing away
from rotating reels.
When the backlap switch is in the BACKLAP position, the
reels will turn without the operator in the seat.
Carbon Monoxide in exhaust fumes can be fatal when
inhaled, never operate an engine without proper
ventilation.
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 reel to bedknife as described in Sections 3.13
and 3.14.
2.
Obtain and engage 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
switch is Off, backlap switch is Off, and the traction
pedal is in Neutral.
c.
Start the engine, turn the mechanics key to Backlap
then engage the reel switch. If any of the reels turn,
adjust nut (A) to stop the reel.
3.
Turn nut (A) on the reel to be backlapped so the reel
turns in reverse. Adjust the reel speed to 100-150
RPM.
a.
Apply lapping compound with a long handle brush
to high spots first then along entire length of the
reel.
b.
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.
c.
When the blades have been evenly honed, turn
adjusting nut (A) to neutral. Carefully and
thoroughly remove all lapping compound from reels
and bedknife before running the reel in forward
direction.
d.
Disengage reel switch and turn backlap switch to
Off.
4.
Reset reel motors to forward rotation. If reel speeds
vary, check nut (A) to insure it is turned completely to
full forward rotation.
5.
Remove and store the backlap key.
MAINTENANCE
A
Figure 8C
8
35
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