How to Perform the Tracking Adjustment | Wright Manufacturing 26077

Changing the Speed/Sensitivity Adjustment

The controls are initially set with the Speed/ Sensitivity Adjustment in the faster, more sensitive position. If an operator is not completely familiar with the mower operation the operator 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

a25-30% change in the ground speed making the controls less sensitive. After stopping the engine, the adjustment is made by removing the bolts that hold the control rods onto the control lever from the current holes in the control levers and reinstalling them and the rods into the alternate holes. The top holes closest to the control handles are for the faster, more sensitive setting and the bottom holes, farthest from the control handles, are the slower, less sensitive setting. BE SURE THE BOLTS IN THE CONTROL RODS ARE SECURELY IN PLACE EACH TIME YOU REMOVE THEM. You must then perform the Tracking Adjustment described below.

How to Perform the Tracking

Adjustment

First ensure that the tire pressure is equal on both rear drive tires (18-22 psi) and also the front caster tires (30-40 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. 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.

In the “faster” Speed/Sensitivity setting (this is the factory setting) 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. Remember, this procedure does not apply if the Speed/ Sensitivity Adjustment is in the slower setting. Otherwise you will wind the swivels way up the rods and the mower will go faster but will lose most or all of its reverse capability and then the gap between the handlebar and the control levers becomes excessive when at the neutral position.

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 the right-side rod) or the left side needs to go slower (by shortening the left-side rod). It is important that neither rod should be lengthened too far, as mentioned above.

The only reference point to limit the adjustment from becoming extremely off is the relative position of the pump stop and the handlebar in the faster Speed/Sensitivity setting. Therefore, if everything is way off either because you are installing new parts (or other reasons) you should only use the faster Speed/ Sensitivity setting to get the tracking accurate and then change to the slower speed range and adjust the tracking only one or two turns on either side.

After getting the mower to track straight, readjust the neutral adjustment on the pump by using a