MULTIQUIP Whiteman J36H55 Operation And Parts Manual page 35

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 Figures 45 and 46:
3
4
1
Trowel Arm Round Shaft Section
1
2 Trowel Arm Semi-Round Shaft Section
3 Lever Mounting Slot (Left Arm Shown)
Roll Pin Hole
4
Blade Attachment Bolt Hole (One of Two)
5
6 Flat of Semi-Round Shaft (Top of Arm)
Figure 45. 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 inch (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 46 item 3) .
4
3
Trowel Arm
1
2 Flat Test Surface
3 Feeler Gauge (.004 in. / 0.10 mm)
Feeler Gauge (.005 in. / 0.127 mm)
4
Figure 46. Checking Trowel Arm Flatness
J36/M30 WALK-BEHIND TROWEL — OPERATION AND PARTS MANUAL — REV. #10 (05/07/12) — PAGE 35
6
5
2
1
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 inch (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 47) 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.
1
2
3
4
2
Figure 47. 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 48.
NOTICE
Arms with clockwise blade rotation use the fixture arm in the UP
position (A in Figure 40). Arms with counterclockwise blade
rotation use the fixture with the fixture arm in the DOWN position.
(B in Figure 48).
MAINTENANCE
SIDE VIEW
Adjustment Bolt
"Distance"
Locking Nut
Fixture Arm