Wright Manufacturing 14SH654 owner manual Changing the Speed/Sensitivity Adjustment

Slow setting

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 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 position 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.

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

Frontspeed.

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. After stopping the engine, the adjustment is made by removing rod ends from the current holes in the control system torsion bar and reinstalling them into the alternate holes. The holes closest to the operator position are for the slower, less sensitive setting and the holes farthest from the operators position are the faster, more sensitive setting. 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). 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. Shortening the control rod will increase the speed of the forward movement of the mower

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on that side. Lengthening the control rod will slow 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.

If the rod is made shorter it will increase the forward speed capability for that side of the mower and if the rod is made longer 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 shortening the left-side rod) or the right side needs to go slower (by lengthening the right-side rod). If the mower is tracking to the right, either the right side needs to go faster (by shortening the right- side rod) or the left side needs to go slower (by lengthening the left-side rod). It is important that neither rod should be shortened 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, check and/or readjust the neutral adjustment on the pump by using a ¼” allen wrench at the Return-to- Neutral (RTN) mechanism, if necessary. It is normal to make these adjustments from time to time.

How to Test/Use the Blade Clutch/Brake Switch

Before testing the blade clutch/brake operation, make sure the area is clear and there is nothing vulnerable to thrown objects from under the mower. No one should be near the mower deck or in its line