Sears 917.25953 Lawn Mower User Manual


 
CUSTOMER RESPON
TRACTOR
Always observe safety rules when performing any mainte-
nance.
BRAKE OPERATION
If tractor requires more 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)o
TIRES
o Maintain proper air pressure in ail tires (See "PROD-
UCT SPECIFICATIONS" on page 3 of this manual).
Keep tires free of gasoline, oil, or insect control chemi-
cals which can harm rubber
o Avoid stumps, stones, deep ruts, sharp objects and
other hazards that may cause tire damage.
NOTE: To seal tire punctures and prevent flat tires due to
slow ieaks, tire sealant may be purchased from your local
parts dealer. Tire sealant also prevents tire dry rot and
corrosion_
BLADE CARE
For best results mower blades must be kept sharp, Re-
place bent or damaged blades.
BLADE
FLAT W_N__ _
LOCK WASHER-_
HEX BOLT
(GRADE 8)*
_ MANDREL
ASSEMBLY
J TRAILING EDGE
*A GRADE 8 HEAT TREATED BOLT CAN BE
IDENTIFtED BYSfXLINESONTHEBOLTHEAD,
FIG, 't4
TO SHARPEN BLADE (See Fig. 15)
Care should be taken to keep the blade balanced. An
unbalanced blade will cause excessive vibration and even-
tual damage to mower and engine.
° The blade can be sharpened with a file or on a grinding
BLADE REMOVAL (See Fig. 14)
. Raise mower to highest position to allow access to
blades.
o Remove hex bolt, lock washer and flat washer securing
blade,,
o Install 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,,
wheel. Do not attempt to sharpen while on the mower.
To check bFadebalance, you will need a 5/8" diameter
steel bolt, pin, or a cone balancero (When using a cone
balancer, follow the instructions supplied with bal-
ancer).
Slide blade on to an unthreaded portion of the steel bolt
or pin and hold the bolt or pin parallel with the ground.
If blade is balanced, it should remain in a horizontal
positiOn.r If either end of the blade moves downward,
sharpen the heavy end until the blade is balanced.
° Tighten bolt securely (30-35 Ft. Lbs. torque).
IMPORTANT: BLADE BOLT IS GRADE 8 HEATTREATED.
NOTE: We do not recommend sharpening blade- but if you
do, be sure the blade is baranced.
NOTE: Do not use a nail for balancing blade. The lobes of
the center hole may appear to be centered, but are not°
CENTERHOLE
5/B" BOLT BLADE
OR PIN J
FIG. 15
17