Sears 917.25156 - Manual (Page 22)

SERVICE AND ADJUSTMENTS
FRONT-TO-BACK ADJUSTMENT (See Figs. 20 and 21) -
IMPORTANT: DECK MUST BE LEVEL SIDE-TO-SIDE. IF
THE FOLLOWING FRONT-TO-BACK ADJUSTMENT IS
NECESSARY, BE SURE TO ADJUST BOTH FRONT LINKS
EQUALLY SO MOWER WILL STAY LEVEL SIDE-TO-SIDE.
To obtain the best cutting results, the mower housing
should be adjusted so the front is approximately 1 /8" to 1 /2"
lower than the rear when the mower is in its highest
position.
Check adjustment on right side of tractor. Measure dis­
tance "F directly in front of and behind the mandrel at
bottom edge of mower housing as shown.
• Before making any necessary adjustments, check that
both front links are equal in length.
• If links are not equal in length, adjust one link to same
length as other link.
• To lowerfront of mower housing, loosen nut "Con both
front links an equal number of turns.
• When distance “P is 1/8" to 1/2" lower at front than
rear, tighten nut “H” against trunnion on both front links.
• To raise front of mower housing, loosen nut “H” from
trunnion on both front links. Tighten nut “G" on both
front links an equal number of turns.
• When distance "P is 1/8“ to 1/2" lower at front than
rear, tighten nut “H" against trunnion on both front
links.
NOTE: Each full turn of nut "G” will change dim. “P by
approximately 3/8".
•
Recheck side-to-side adjustment.
TO REPLACE MOWER DRIVE BELT
MOWER DRIVE SELT REMOVAL (See Fig. 22) -
• Park tractor on a level surface. Engage parking brake.
•
Remove four screws from L.H. mandrel cover and
remove cover.
• Roll belt over the top of LH. mandrel pulley.
• Remove belt from electric dutch pulley.
• Remove belt from idler pulleys.
• Remove any dirt or grass clippings which may have
accumulated around mandrels and entire upper deck
surface.
• Check primary idler arm and two idlers to see that they
rotate freely.
• Be sure spring is securely hooked to primary idler arm
and bolt in mower housing.
MOWER DRIVE BELT INSTALLATION (See Fig. 22) -
•
Install belt in both idlers. Make sure belt is in both belt
keepers at the idlers as shown.
• Install new belt onto eiectric clutch pulley.
• Roil belt into upper groove of L.H. mandrel puiley.
• Carefully check belt routing making sure beit is in the
grooves correctly and inside belt keepers.
• Reassemble L.H. mandrel cover.
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