Gravely Promaster 272Z - Jump Starting Battery; Mower Blade Removal; Sharpening Mower Blade

GB - 19
5. Install battery on unit (see Battery Removal and
Installation on page 18).
Jump Starting Battery
Unit used for jump starting should have a 12 volt battery with
at least 500 cold cranking amperes, and a negatively
grounded system.
IMPORTANT: Ensure battery is not frozen. If fluid is frozen,
remove battery from unit and allow battery to thaw before
charging.
1. Connect positive (+) jumper cable to positive terminal of
discharged battery (figure 9).
2. Connect the other end of the same jumper cable to
positive (+) terminal of booster battery.
3. Connect one end of the second jumper cable to
negative (–) terminal of booster battery.
4. Make the final jumper cable connection to engine block
or the furthest ground point away from the discharged
battery.
NOTE: If engine will not start after several tries, unit or
battery may need service.
5. Start engine.
6. After engine starts, leave cables connected for one to
two minutes.
7. Disconnect jumper cables in reverse order of
installation.
8. Operate unit as normal to charge battery.
MOWER BLADE REMOVAL
NOTE: If mower is used under sandy soil conditions, replace
mower blades when air lifts become eroded through at ends
(figure 11).
Removal (Figure 10)
1. Block mower blades to prevent rotation.
2. Remove bolts, washers, and mower blades from spindle
shafts.
Installation
(Figure 10)
1. Install mower blades, washers, and bolts on spindle
shafts.
2. Tighten bolts to 115-125 lbf-ft (156-169 N•m).
SHARPENING MOWER BLADE
NOTE: If mower is used under sandy soil conditions, replace
mower blades when air lifts become eroded through at ends
(figure 11).
1. Remove mower blade from unit.
Discard mower blade if (figure 11):
• More than 1/2 in. (1.27 cm) of metal is removed.
• Air lifts become eroded.
• Blade is bent or broken.
2. Sharpen mower blade by removing an equal amount of
material from each end of mower blade. DO NOT
change angle of cutting edge or round the corner of
mower blade.
WARNING: Make sure cables are clear of any
moving engine parts before starting engine.
CAUTION: Mower blades are sharp and can cut
you. Wrap mower blades or wear gloves, and use
extra caution when servicing.
Figure 10
OF3312
1
1. Mower Blade
2. Spindle Shaft
3. Washer
4. Bolt
2
3
4
CAUTION: DO NOT sharpen mower blades whjile
on unit. An unbalanced mower blade will cause
excessive vibration and eventual damage to unit.
Check mower blade balance before reinstalling
blades.
NEVER weld or straighten bent blades.
Figure 11
OF3310
1
2
DO NOT Sharpen To This Pattern
Sharpen To This Pattern
1. Air Lift Erosion
Area
2. Cutting Edge
DISCARD
if more
than 1/2 in.
(1.27 cm)