Trowel Arm adjustment Procedure
The following procedure should be followed to adjust trowel arms when
NOTE it becomes apparent that the trowel is finishing poorly or in need of routine maintenance.
A level, clean area to test the trowel prior to and after adjustement is essential. Any unlevel spots in the floor or debris under the trowel blades will give an incorrect perception of adjustment. Ideally, a 5' x 5'
1.To determine which blades need adjustment, place the
■Pitch the blades as flat as possible and look at the adjustment bolts.They should all barely make contact with the lower wear plate on the spider. If you can see that one of them is not making contact, some adjustment will be necessary.
■Is the machine wearing out blades unevenly (i.e. one blade is completely worn out while the others look new)?
Figure 29 below illustrates "worn spider bushings or bent trowel arms". Check to see that adjustment bolt is barely touching (0.10" max. clearance) lower wear plate. All alignment bolts should be spaced the same distance from the lower wear plate.
Figure 29. Worn Arm Bushings
HTN-SERIES — MAINTENANCE
Figure 30 below illustrates the "correct alignment " for a spider plate (as shipped from the factory).
Figure 30. Correct Spider Plate Alignment
2.Start engine, and bring trowel blades up to full speed and look for the following conditions:
■Does the trowel have a perceived rolling or bouncing motion?
■Does the guard ring “rock up and down” relative to the ground?
Stabilizer Ring Removal
1.If the trowel is equipped with an outer stabilizer ring (Figure 31), remove the four bolts at the end of each spider arm.
STABILIZER
RING
REMOVE
TO FREE
SPIDER
ASSEMBLY
Figure 31 Stabilizer Ring
2.Examine stabilizer ring for out of round or bends. If ring is damaged, replace ring. If ring is found to be correct with no damage, set aside.