6 SERVICE AND MAINTENANCE
6-1
How to Adjust Neutral
Neutral refers to the machine movement when the
engine is set to full throttle, parking brake is off, and
the control levers are in the neutral position. The
machine should not move forward or backward in this
state. If it does, the neutral setting must be adjusted
by using the Return-to-Neutral (RTN) device built into
the linkage of the hydraulic pump.
1.
Lift the rear drive wheels off the ground using a
jack and stands.
2.
Loosen the ¼” Allen bolt (A)
3. Rotate the RTN device on the pump
corresponding to the wheel that needs
adjustment. Stop when the neutral position is
found.
4.
Retighten the ¼” Allen bolt. Do not over tighten.
Speed/Sensitivity
The controls are initially set with the Speed/Sensitivity
Adjustment in the faster, more sensitive position.
Some operators may desire to decrease the ground
speed. The slower setting has a corresponding
decrease in the sensitivity of the controls. In other
words, a given amount of movement of the control
levers will cause about a 25-30% change in the
ground speed making the controls less sensitive.
1. Stop the engine
2. Remove the bolts securing the control rods to
the control levers
3. Re-install the rods into the alternate holes
4. BE SURE THE CONTROL ROD BOLTS ARE
SECURELY IN PLACE EACH TIME YOU
REMOVE THEM.
5. Perform the tracking adjustment
Check and Adjust Tracking
•
Do not adjust the stationary control rods.
•
Do not adjust rods such that the pump control
lever (on the side of the pump) hits the internal
pump stop while at full speed.
•
This puts direct pressure on the pump stop and
can damage the hydro pump.
•
It can be identified by feeling resistance in the
hand controls at the full speed position.
Check Machine Tracking
1. Ensure rear tire pressure is equal on both sides.
2. Drive at full throttle in a level parking lot.
3. Check if the machine drives straight when both
control levers are in the full speed position. If it
does not, tracking adjustment is needed
Adjust Machine Tracking
1. Ensure the machine is parked and the engine is
off.
2. Loosen the jam nut on the rods connected
directly to the hydro pumps.
3. Adjust the rods.
•
Turning CCW lengthens the rod and increases
speed
•
Turning CW shortens the rod and decreases
speed
•
If the machine tracks to the left: lengthen the
left rod or shorten the right rod.
•
If the machine tracks to the right: lengthen the
right rod or shorten the left rod.
Reaching Maximum Capable Speed
(Only applies when in the “Faster” Speed/Sensitivity
setting)
1. Lengthen the rods one turn at a time until you
feel, in the hand control, the pump control lever
contacting the internal pump stop.
2. Shorten the rods one full turn each.
Tire Maintenance and Pressure
•
Excessively worn tire tread is dangerous on all
hills. Replace drive tires with less than 3/32” of
any tread groove left.
•
Use tires with the tread pattern recommended
by Wright Mfg., Inc. only.
•
Keep the drive tire pressure between 18-22 psi.
•
Higher pressures cause the tires to have less
traction, decreasing safety, speed and ride
quality
•
Front Casters are equipped with non-pneumatic
tires and do not require any air. They do not
have any tread but should be replaced when
excessively worn.
SLOWER FASTER
