Craftsman 917.256930 - Manual (Page 20)

SERVICE AND ADJUSTMENTS
TO LEVEL MOWER HOUSING
Adjust the mower while tractor is parked on level ground or
driveway. Make sure tires are properly inflated (See
“PRODUCT SPECIFICATIONS” on page 3 of this manual).
If tires are overorundeiinflated, you will not properly adjust
your mower,
SIDE-TO-SIDE ADJUSTMENT (See Figs. 25 and 26) -
You will need two (2) standard 2x4 short pieces of wood
to make the following adjustment. Similar blocks measur­
ing 1-1/2" thick may also be used.
» Raise mower with attachment lift control to allow two
(2) 1-1/2" thick blocks to be placed under rear edge of
mower deck,
» Place one block directly behind right mandrel. Place
the remaining block under the stamped ridge on left
side of rear edge of mower deck
NOTE: Be sure blocks clear ali hardware that may be
exposed on underside of deck.
» Lower mower deck to its lowest height of cut position.
■> Loosen nut “C” so that the adjustment plate can move
up and down freely.
» Be sur e the mower deck rests level on both 1 -1/2“ thick
blocks. Retighten nut “C".
« Raise mower with attachment lift control and remove
blocks from under mower.
PLACE TWO (2) 1-1/2“ THICK BLOCKS UNDER REAR EDGE OF
DECK AS SHOWN (Use wood 2 x 4's or equivalent)
O 0
O Ojy
1
UNDER
STAMPED
DIRECTLY x;-.,
BEHIND
MANDREL -------- -----
MOWER MUST BE IN LOWEST HEIGHT OF CUT POSITION
FIG. 25
FRONT-TO-BACK ADJUSTMENT (See Figs. 27 & 28) -,,
IMPORTANT: DECK MUST BE LEVEL SlDE-TO-SIDE. IF
THE FOLLOWING FRONT-TO-BACK ADJUSTMENT IS
NECESSARY, BE SURETO 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 /4 to 3/4"
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.
» Befor e 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 iower front of mower housing, loosen nut "G" on
both front links an equal number of turns.
“ When distance "F" is 1/4" to 3/4" lower at front than
rear, tighten nut" H ” against trunnion on both front iinks,.
® To raise front of mower housing, ioosen nut "H" from
trunnion on both front iinks. Tighten nut "G" on both
front links an equal number of turns,
» When distance "F" is 1/4" to 3/4" iower at front than
rear, tighten nut"H" against trunnion on both front iinks,
NOTE: Each full turn of nut "G" will change dim. "F” by
approximately 3/8 inch.
<» Recheck side-to-side adjustment.