Gravely 915015 - 1742 ZT - Manual (Page 24)

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6. Tighten height adjuster nuts.
7. Secure height adjusters with washers and hair
pins.
To Adjust 42" Deck:
1. Place mower in the number three (3) postition.
2. Place anti-scalp rollers in highest position so they
do not touch the ground during adjustment.
3. Turn the nuts on the bottom of the adjusters
equally until the blade tips are 2 3/4” from the
ground.
4. Reset anti-scalp rollers to match desired
attachment postition.
TO LEVEL MOWER
Adjust the mower while tractor is parked on level
ground or driveway. Make sure tires are properly
inflated (See Specifications). If tires are overinflated or
underinflated, you can not properly adjust your mower.
To Check Side to Side Level
1. Position unit on a smooth, flat, level surface. Set
proper tire pressure.
2. Position blade(s) side to side; measure distance
of blade tips to floor at right and left side of mower
pan. Rotate blade(s) 180˚ and check again. The
measurement should be equal within 1/16 inch
side to side.
NOTE: To make measuring distance from blade to
ground easier, obtain a wood block about 1 inch square
by 5 inches long. Wrap the entire block with masking
tape. Hold block in vertical position with its lower tip on
ground. Push block against cutting edge of blade so as
to make a mark on tape. Pull the block away and with a
ruler measure the distance from lower block tip to
mark.
To Adjust Side to Side Level (48" Deck)
1. Loosen height adjuster nuts.
2. Remove hair pins and washers holding height
adjusters to lift arm and unhook height adjusters
from lift arm.
3. On low side: Turn height adjuster nut clockwise
on low side of mower pan to raise low side. Raise
low side one half the measured difference in
height between the low side and the high side.
On high side: Turn height adjuster nut
counterclockwise to lower high side the other one
half of the height difference.
4. Hook height adjusters onto lift arm and check
side to side level. If not level, continue to turn
height adjusters until deck is level side to side.
5. Tighten height adjuster nuts.
6. Secure height adjusters with washers and hair
pins.
To Adjust Side to Side Level (42" Deck)
1. Place anti-scalp rollers in highest position so they
do not touch the ground during adjustment.
2. Put height adjustment lever in the number three
(3) position.
3. With a 1/2" open-end wrench, adjust the nuts on
the bottom of the adjuster link until each end of
the blade is 2-3/4" from the ground within 1/16".
4. Reset anti-scalp rollers to match desired
attachment position.
MOWER PITCH
Proper blade pitch is when the blade tip, measured
from the bottom surface, is 1/8" to 1/4" lower at front of
mower deck than when same tip is at rear of mower
deck.
To Adjust 48" Deck
To adjust pitch, loosen flange lock nuts and slide
adjusting tabs up or down to achieve proper pitch.
To Adjust 42" Deck
To adjust pitch, turn nut on rod link at front of mower
deck. Turn the nut clockwise to raise the front of the
deck. Turn the nut counterclockwise to lower the front
of the deck.
Cutting Edge
Mower Deck
Blade
Cutting Height
Ground Level
(Shown from front)
OT0860
Height Adjuster Nut
Height
Adjuster
Adjusting Tab
Carriage Bolt
Flange Locknut
OT0770
Rear Blade
Ground Level
Front Blade
Cutting Edge
Height Height
Mower Deck
(Shown from side)
OT0850