Bush Hog ZERO TURN MOWERS - Manual (Page 17)

NEUTRAL ADJUSTMENT - DRIVE
1. Raise the drive wheels of the Zero Turn off of the
ground. Safely block the frame in this position so it is
secure.
2. Check to be sure the self centering dampener is
in synchronized with the control levers. (Pull back on
control levers and let go; they should return to the
neutral location.) This is adjusted by locking the con-
trol lever in the neutral position (swung out) and
loosening the retainer nut on the self centering
dampener located on either side of the seat frame.
Allow the self centering dampener to locate the posi-
tion in the slot and retighten the nut.
3. With the operator in the seat, start the engine,
leaving the control levers in the neutral position.
Release the parking brake. Check drive wheels for
any rotation.
4. Stop engine and engage parking brake. If the
drive wheels creeped (rotated) in the neutral position
this should be adjusted out. This adjustment is per-
formed at the adjustable pump link on each corre-
sponding pump. Make the adjustment by either
lengthening or shortening the distance of the adjust-
ing links. If the wheel rotates in the forward direction,
shorten the rod. If the wheel rotates in the reverse
direction, lengthen the rod. Retighten the jam nut.
Start the engine and recheckthe adjustment.
5. If wheel still creeps, repeat procedure in step 4.
6. After final adjustment is made (make sure that
the jam nut is tight on pump link), take unit for a test
drive.
DRIVE ADJUSTMENTS
Steering and motion controls should be uniform in all
forward and reverse speeds. Levers should automat-
ically return to neutral when released.
CAUTION
STOP THE ENGINE BEFORE MAKING
ADJUSTMENTS.
TEST DRIVE OPERATIONS
Check air pressure in tires. Equal tire pressure is
critical for proper drive operation.
1. Raise drive wheels off ground. Safely block
the frame in this position.
2. Put control levers in neutral lock position
(control levers swung outward).
3. Start engine.
Wheels should not rotate. If one or both drive wheels
are turning, perform procedures under “Neutral
Adjustments” for side(s) that wheel turns.
LEVELING THE DECK
1. Set all tire pressures to correct specifications.
2. Place machine on a level slab of concrete.
3. Lower the deck to ground level.
4. (SIDE TO SIDE) Wear heavy gloves and posi-
tion the blades by hand so all the blades are pointed
in the same direction from “SIDE TO SIDE”.
Measure from the blade tip (beveled edge) to the
ground on all three blades. If there is more than
3/16” difference from one side to the other, the deck
should be leveled.
5. Correct the difference by shortening or lengthen-
ing the side adjusting links. To raise the deck, short-
en the length of the adjusting link. To lower the
deck, lengthen the adjusting link.
6. (FRONT TO REAR) Wear heavy gloves and posi-
tion the blades by hand so all the blades are pointed
in the same direction from “FRONT TO REAR”.
15
CAUTION
STOP ENGINE, SET PARKING BRAKE, REMOVE
IGNITION KEY AND SPARK PLUG WIRES
FOR SAFETY
7. GREASING TOP BEARING IN GEARBOX
Grease top bearing with grease gun (1-2 shots)
every 50 hours.
Grease Fitting For Top Bearing
Self Centering Dampener
Slotted Hole With
Retaining Nut On Back Side
Pump LInk Adjustments
Pump Arm
Control Lever
Mounting Plate