mAINTENANCE

Trowel Arm Adjustment

Use the following procedure to check and adjust trowel arms, and check for worn or damaged components when it becomes apparent that the trowel is finishing poorly or in need of routine maintenance.

Look for the following indications. Trowel arm alignment, worn spider bushings or bent trowel arms may the cause.

„„Are blades wearing unevenly? Is one blade 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?

1. Place the trowel in a FLAT, LEVEL area.

A level, clean area to test the trowel prior to and after 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 Ft. (1.5 x 1.5 Meter) three-quarter inch (19 mm) thick FLAT steel plate should be used for testing.

2.Pitch the blades as flat as possible. The adjustment bolts should all barely make contact with the lower wear plate on the spider. If one is not making contact, adjustment will be necessary. (Figure 35).

Figure 35 illustrates, "incorrect alignment", worn spider bushings or bent trowel arms. Check that the 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.

Adjustment Bolt

Lower Wear Plate

 

Surface

Dished Effect on

Finished Concrete

Figure 35. Incorrect Spider Plate Alignment

Figure 36 illustrates the "correct alignment " for a spider plate (as shipped from the factory).

Trowel Arm

Gearbox

Mounting Bar

Blade

Surface

Correct Alignment

Figure 36. Correct Spider Plate

AlignmentSpider Removal

Remove the spider assembly from the gearbox shaft as follows:

1.Locate the cone point square head set screw (Figure 37) and attached jam nut found on the side of the spider

assembly.

Gearbox

Gearbox Shaft

Upper Wear Plate

Thrust Collar Bearing

Thrust Collar

Thrust Collar Bushing

Lower Wear Plate

Jam Nut

Spider Plate

Set Screw (Cone Point, Square Head)

Figure 37. Spider/Gearbox Removal

HHXG5 RIDE-ON TROWEL • operation manual — rev. #1 (10/25/10) — page 39

Page 39
Image 39
Multiquip HHXG5 Trowel Arm Adjustment, Place the trowel in a FLAT, Level area, Distance from the lower wear plate