Sears 917.257643 Lawn Mower User Manual


 
CUSTOMER R
TRACTOR
Always observe safety ruleswhen performing any mainte_
nanceo
BRAKE OPERATION
BLADE
tf tractor requiresmore than six (6) feet stopping distance
at high speed in highest gear, then brake must be adjusted.
(See "TO ADJUST BRAKE" in the Service and Adjust-
ments section of this manual).
TIRES
= Maintain proper air pressure in at!tires (See "PROD-
UCT SPECIFICATIONS on page 3 ofthis manual),
Keep tires free ofgasoline, oil,or insectcontrol chemi-
cals which can harm rubber.,
= Avoid stumps, stones, deep ruts, sharp objects and
other hazards that may cause tire damage.,
BLADE CARE
For best results mower blades must be kept sharp_ Re_
place bent or damaged blades.,
BLADE REMOVAL (See Fig, 13)
Raise mower to highest position to allow access to
blades.
Remove hex bolt, lock washer and fiat washer securing
blade_
- lnstali new or resharpened blade with trailing edge up
towards deck as shown.
° Reassemble hex bolt, lock washer and flat washer in
exact order as shown.
IBILtTIES
MANDREL
ASSEMBLY
TRAILING EDGE
FLAT WASHER l
LOCKWASHER_ "'_
HEX BOLT
*A GRADE 8 HEAT TREATED BOLT CAN BE
IDENTIRED BY StX LINES ON THE BOLT HEAD,.
FIG. 13
° Tighten bolt securely (30-35 Ft. LbSotorque),
iMPORTANT: BLADE BOLT 1SGRADE 8 HEATTREATED
NOTE: We do not recommend sharpening blade- but ifyou
do, be sure the blade is balanced_
TO SHARPEN BLADE (See Fig. 14)
Care should be taken to keep the blade balanced. An
unbalanced blade wiUcause excessive vibration and even-
tual damage to mower and engine,
° The blade can be sharpened with a file or on a grinding
wheel Do not attempt to sharpen while on the mower,
To check blade balance, you will need a 5/8" diameter
steel bolt, pin, or a cone batancero (When using a cone
balancer, follow the instructions supp3ied with bal-
ancer).
° Slide blade on to an unthreaded portion ofthe steel bolt
or pin and hold the bolt or pin parallet with the ground.
tf blade is balanced, it should remain in a horizontal
position. If either end of the blade moves downward,
sharpen the heavy end until the blade is balanced.
NOTE: Do not use a nail for balancing blade., The lobes of
the center hole may appear to be centered, but are noL
CENTER HOLE / /
FIG. 14
16