Wright Serial # 69788 and Higher - Manual (Page 23)

23
WARNING
WARNING
5.5.1 Never Drive Straight Onto or Off a Curb
Never drive straight onto or off a curb. If you do the whole procedure at a very sharp angle it will tend to
minimize the contact of the mower deck with the curb and you will be able to more safely control the mower.
It is recommended to use ramps to drive on and off of curbs. Using ramps, you can easily back on and
off without damaging your mower or the curb.
5.6 Mowing on Varying Terrain
See the Safety Instructions section of this manual, especially the parts on:
•
Initial Operating Safety Guidelines
• Operation On Slopes
• Operation In Reverse
•
Operation In Forward Direction
• Operation During Zero-Radius Turns
5.7 How to Adjust Neutral
Neutral refers to the mower movement when the engine is set to full throttle, parking brake is off, and the
control levers are in the neutral position. The mower should not move forward or backward during this time.
If the mower is moving forward or rearward, the neutral setting must be adjusted. The hydraulic pump has a
Return-to-Neutral (RTN) device built into the linkage of the pump. Before
adjusting neutral, it is necessary to lift the rear drive wheels off the
ground using a jack and stands. To make the adjustment, loosen the ¼”
Allen bolt (A)(this requires a modified
¼” Allen) and rotate the RTN
device on the pump corresponding to the wheel that needs adjustment. If
the right wheel turns in the neutral position, then the right pump RTN
needs to be adjusted. The RTN mechanism should be rotated until the
neutral positi
on is found and then retighten the ¼” allen bolt. Use care
not to over tighten the allen bolt. Repeat the procedure on the other
pump if necessary.
5.8 How to Perform the Tracking Adjustment
First ensure that the tire pressure is equal on both rear drive tires. (18-22 psi) Drive the mower on a level
parking lot with the engine at full throttle. Check that the mower drives in a straight line when both hand
controls are held to the full speed position. If not, park the mower and stop the engine. Only adjust the rods
connecting directly to the hydraulic pump linkage. The stationary rods are not to be adjusted. The adjustment
is made by loosening the jam-nuts on the control rods (this may need to be done to one or both control rods)
and adjusting the control rods. Once the jam-nuts are loosened at the top and bottom of the control rod
proceed to turning the control rod clockwise or counter-clockwise. Turning the control rod clockwise will
shorten the control rod and slow the forward movement of the mower on that side. Turning the control rod
counter-clockwise will lengthen the control rod and increase the speed of the forward movement of the mower
on that side.
Neither rod should be lengthened so much that at full speed it pulls the pump control lever (on the sides of the
pumps) against the internal pump stop. Therefore, to reach the maximum capable speed, the rods should be
lengthened one turn at a time until you can feel, in the hand control, that the internal pump stop has been
contacted. Then shorten the rod one turn (damage to the hydro pump will occur if the controls are adjusted in
a way that put direct pressure on the internal pump stop). You will feel the slight resistance. There is no need
to start the engine while checking this incrementally.
If the rod is made longer it will increase the forward speed capability for that side of the mower and if the rod
is made shorter it will slow down that side of the mower. So, if the mower is tracking to the left, either the left
side needs to go faster (by lengthening the left-side rod) or the right side needs to go slower (by shortening
the right-side rod). If the mower is tracking to the right, either the right side needs to go faster (by lengthening
A