Multiquip HHXG5 Checking Trowel Arm Straightness, Locate the trowel arm adjustment tool P/N

mAINTENANCE

Checking Trowel Arm Straightness

Trowel arms can be damaged by rough handling, (such as dropping the trowel on the pad), or by striking exposed plumbing, forms, or rebar while in operation. A bent trowel arm will not allow the trowel to operate in a smooth fluid rotation. If bent trowel arms are suspect, check for flatness as follows, refer to Figure 42 and Figure 43:

Lever Mounting Slot

(Left Arm Shown)

Roll Pin Hole

Blade Attachment

Bolt Hole (1 of 3)

Flat of D-Shaft

(Top of Arm)

Trowel Arm

Round Shaft Section

Trowel Arm

D-Shaft Section

Figure 42. Trowel Arm

1.Use a thick steel plate, granite slab or any surface which is true and flat, to check all six sides of each trowel arm for flatness.

2.Check each of the six sides of the trowel arm (hex section). A feeler gauge of .004" (0.10 mm) should not pass between the flat of the trowel arm and the test surface along its length on the test surface. (Figure 43) .

Trowel Arm

Flat Test

Surface

Feeler Gauge

(.005 in./0.127mm)

Feeler Gauge

(.004 in./0.10mm)

Figure 43. Checking Trowel Arm Flatness

3.Next, check the clearance between the round shaft and the test surface as one of the flat hex sections of the arm rests on the test surface. Rotate the arm to each of the flat hex sections and check the clearance of the round shaft. Use a feeler gauge of .005" (0.127 mm). Each section should have the same clearance between the round of the trowel arm shaft and the test surface.

4.If the trowel arm is found to be uneven or bent, replace the trowel arm.

Trowel Arm Adjustment

Shown in (Figure 44) is the adjustment fixture with a trowel arm inserted. As each trowel arm is locked into the fixture, the arm bolt is adjusted to where it contacts a stop on the fixture. This will consistently adjust all of the trowel arms, keeping the finisher as flat and evenly pitched as possible.

1. Locate the trowel arm adjustment tool P/N 9177.

ADJUSTMENT

BOLT

LOCKING

NUT

DISTANCE

FIXTURE

ARM

SIDE-VIEW

Figure 44. Trowel Arm Adjustment Tool Side View

2.Ensure the fixture arm is in the proper setting (up or down) for your trowel arm rotation as shown in Figure 45.

Figure 45. Trowel Arm Adjustment Setup

HHXG5 RIDE-ON TROWEL • operation manual — rev. #1 (10/25/10) — page 41