CARE AND MAINTENANCE - MODEL 5421
DRIVE SYSTEM ADJUSTMENTS:
| Adjustment of the drive system is limited to the actual function of the hydrostatic |
| transmissions as outlined below. |
1. | The idler pulley travel required to engage the belt drive should be held to approximately |
| 1 3/4". To adjust this distance, loosen the nuts on both ends of the rod extending |
between the idler plate and the brake shaft. Turn the rod as required to achieve desired pulley travel of approximately 1 3/4" when the brake handle is released. Tighten nuts firmly against the ball joint rod ends. See Figure 1 .
2.The twisted idler belt (P/N 1 860) should be aligned in the center of the pulley. To adjust the alignment, tighten or loosen the nut which holds on the pulley, as required, until belt is visually centered on the pulley. Start engine and disengage brake to determine whether pulley alignment is maintained during operation. Shut off engine and repeat procedure, if necessary. See Figure 2.
3.The brake bands should fit tightly around brake drums with the brake handle "on", and release drums with handle in the "off" position. Brake handle should be placed in both "off" and "on" positions several times to determine whether brake bands are functioning correctly. If band is too loose, tighten the nut on the threaded end of eyebolt extending from brake band. If band does not release drum, loosen nut until achieving desired results. Repeat procedure, if necessary. See Figure 3.
4.Neutral Adjustment. Swing upper control levers out into the neutral slots. Raise upper body to the fully open position. Start engine and disengage parking brake. Caution should be used when releasing parking brake as mower may tend to creep or move prior to adjustment. If adjustment is required, loosen lock nuts at each end of the control rods and back off the tension on each spring block. Turn control rods in or out until neutral is obtained on each hydrostat.
5.Forward travel speed adjustments. Stop engine, move levers to drive position, lightly push each upper control lever forward until a resistance is felt on the lever. At this time, check that the forward lever stops on the bottom of each lever are hitting the stop blocks. If adjustment is required, loosen the lock nuts on the lever stop and turn the bolt in until the lever hits the stop block before resistance is felt in the hydrostat. See Figure 4.
6.Balance of travel speed. If mower tends to pull to either side, readjust lever stop on fast side to slow the hydrostat down and even out the ground speed. DO NOT SPEED UP THE SLOW SIDE, AS OVER STROKING OF THE HYDROSTAT COULD RESULT IN DAMAGE TO THE UNIT. If upper control levers are slightly
Refer to the diagrams on the following pages for the location of adjustment points.