Craftsman 28875 Operation Manual - Page 34

Blade, Removal, Sharpening, Balance

Get Craftsman 28875 - Professional 26 HP 52 in. Zero Turn Riding Mower PDF manuals and user guides View all Craftsman 28875 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 34 highlights

MAINTENANCE BLADE REMOVAL Follow these instructions to prevent injury during blade removal: 1. Loosen with a box wrench or a socket and long breaker bar. To gain additional leverage, slip a long pipe or thick-walled tube over breaker bar or wrench. 2. Insert wood block A as shown, with grain perpendicular to blade, to prevent blade from turning when loosening. 3. Wear thickly padded gloves. Keep hands clear of blade path. Blades may rotate when bolt releases. BLADE BALANCE Blade balance must be maintained at 5/8 oz-in (19.4 g-cm) or less. Failure to keep blades balanced causes excess vibration, wear, and shortened life of most components of the machine. To balance a blade: 1. Sharpen blade first. 2. Balance the blade at the center. 3. Attach a 1/8 oz (3.9 g) weight at a distance 5" (127 mm) from center on the light end. This should make the light end the heavy end: If it does, the blade is balanced. If does not, file or grind the heavy end until the addition of the weight makes the light end the heavy end. SHARPENING Blades may be sharpened by filing or grinding. Inspect blades before sharpening. Replace bent or cracked blades. Replace blades when the lift portion has worn thin. Maintain cut angle at 30 °. Do not overheat blades when sharpening. Always use Craftsman Professeional blades. Use of another manufacturer's blades may be dangerous. BLADE INSTALLATION 1. Wear thickly padded gloves to prevent cuts from the sharp blade. 2. Insert the blade bolt, in order, through the conical washer (cup side toward the blade, as shown), the blade, and the blade spacer. 3. Install assembly on the blade spindle. 4. Torque the blade bolt to 70 ft-lbs. @ 32

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
MAINTENANCE
BLADE
REMOVAL
Follow these instructions
to prevent injury during
blade removal:
1. Loosen with a box wrench or a socket and long
breaker bar.
To gain additional
leverage, slip a
long pipe or thick-walled
tube over breaker bar or
wrench.
2.
Insert wood block A as shown, with grain
perpendicular
to blade, to prevent blade from
turning when loosening.
3.
Wear thickly padded gloves.
Keep hands clear
of blade path.
Blades may rotate when bolt
releases.
SHARPENING
Blades may be sharpened
by filing or grinding.
Inspect blades before sharpening.
Replace bent or cracked blades.
Replace
blades when the lift portion has worn
thin.
Maintain
cut angle at 30°.
Do not overheat
blades when sharpening.
Always
use Craftsman
Professeional
blades.
Use of another manufacturer's
blades may be
dangerous.
BLADE
BALANCE
Blade balance must be maintained
at 5/8 oz-in
(19.4
g-cm) or less.
Failure to keep blades balanced
causes excess vibration, wear, and shortened
life of
most components
of the machine.
To
balance
a blade:
1.
Sharpen
blade first.
2.
Balance the blade at the center.
3.
Attach a 1/8 oz (3.9 g) weight at a distance 5"
(127 mm) from center on the light end. This
should make the light end the heavy end:
If it does, the blade is balanced.
If does not, file or grind the heavy end until
the addition of the weight makes the light end
the heavy end.
BLADE
INSTALLATION
1.
Wear thickly padded gloves to prevent cuts from
the sharp blade.
2.
Insert the blade bolt, in order, through the conical
washer (cup side toward the blade, as shown),
the blade, and the blade spacer.
3.
Install assembly
on the blade spindle.
4.
Torque the blade bolt to 70 ft-lbs.
@
32