Multiquip HTH44T manual Blade Pitch Adjustment Procedure

HTH44T— MAINTENANCE

Figure 17. Pump Actuation Levers/Speed Control Rod

Matching Blade Pitch for Both Sets of Blades

Sometimes it may be necessary to match blade pitch between the two sets of blades. There are some signs that this may be necessary. For example, the differences in pitch could cause a noticeable difference in finish quality between the two sets of blades. Or, the difference in blade pitch could make the machine difficult to control. This is due to the surface area in contact with the concrete (the blade set with the greater contact area tends to stick to the concrete more).

To fix this problem, each spider assembly can be pitched individually.With a Single Pitch machine, the operator is forced to constantly make adjustments on each pitch tower. On a Twin Pitch machine, the operator must lift up on one of the pitch control handles, disengaging the linkage between the towers. Once this is done, a pitch control crank can be turned to adjust the difference. Make sure to lock the linkage back in place when finished with adjustments.

There are some things to look for when checking to see if adjustment is necessary. Is the machine wearing out blades unevenly (i.e. one blade is completely worn out while the others look new)? Does the machine have a perceptible rolling or bouncing motion when in use? Look at the machine while it is running, do the guard rings “rock up and down” relative to the ground? Do the pitch control towers rock back and forth? These are some of the indications that the blade pitch may need to be adjusted using the adjustment bolts on the trowel blade finger.

Blade Pitch Adjustment Procedure Figure 18. Blade Pitch Adjustment Bolt

The maintenance adjustment of blade pitch is an adjustment that is made by a bolt (Figure 18) on the arm of the trowel blade finger. This bolt is the contact point of the trowel arm to the lower wear plate on the thrust collar.The goal of adjustment is to promote consistent blade pitch and finishing quality.

HTH44T • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #8 (03/27/12) — PAGE 21