Poulan 139700 - Manual (Page 20)

SERVICE AND ADJUSTMENTS
FRONT-TO-BACK ADJUSTMENT (See Figs. 25 and 26)
To obtain the best cutting results, the mower housing should
be adjusted so the back is approximately 7/8" to 1-1/8"
higher than the front when the mower is in height adjustment
position.
Measure distance “D” from ground line to bottom of deck
curl at centerline outside of mandrels.
• To raise rear of mower, loosen nut “E” on both rear
suspension arms. Screw both nuts “F” on both rear
suspension arms
an equal number of turns.
• When distance “D” is 7/8" to 1-1/8" higher at rear than
front, retighten nuts “E”.
• Recheck side-to-side adjustment.
IMPORTANT: WHEN ADJUSTING REAR SUSPENSION ARMS,
ALWAYS ADJUST BOTH EQUALLY SO MOWER WILL STAY
LEVEL SIDE-TO-SIDE.
TO ADJUST ATTACHMENT CLUTCH
(See Fig. 27)
The electric clutch should provide years of service. The
clutch has a built-in brake that stops the pulley within 5
seconds. Eventually, the internal brake will wear so the
mower blades will not stop as recommended. Adjustments
should be made by authorized service technician.
* Make sure attachment clutch and ignition switches are
in the “OFF” position.
• Adjust the three nylon locknuts until the space between
clutch plate and rotor measures .012 inches at all three
slot locations cut in side of brake plate.
NOTE: After installing a new electric clutch, run tractor at
full throttle, and engage and disengage electric clutch 10
cycles to wear in clutch plate.
ROTOR CLUTCH PLATE
FIG. 27
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