Multiquip HHNG5 - Manual (Page 35)

HHNg5 RIDe-ON TROWeL • OpeRaTION maNuaL — Rev. #0 (07/16/13) — page 35
MAIntEnAncE
arm will not allow the trowel to operate in a smooth fluid
rotation. If bent trowel arms are suspect, check for flatness
as shown below. Reference Figure 39:
Figure 38. 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 39) .
Figure 39. 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.
Lever Mounting Slot
(Left Arm Shown)
Roll Pin Hole
Blade Attachment
Bolt Hole (1 of 3)
Flat of Hexagonal-Shaft
(Top of Arm)
Trowel Arm
Round Shaft Section
Trowel Arm
Hex-Shaft Section
TROWEL
ARM
FLAT
TEST
SURFACE
FEELER GAUGE
(.004 in./0.10 mm)
FEELER GAUGE
(.005 in./0.127 mm)
TROWeL aRm aDJuSTmeNT
Shown in (Figure 40) 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.
Figure 40. 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 41.
Figure 41. Trowel Arm Adjustment Setup
ADJUSTMENT
BOLT
“DISTANCE”
LOCKING
NUT
FIXTURE
ARM
SIDE VIEW
NOTICE
Arms with CLOCK-WISE blade rotation use the fixture
arm in the UP position (Figure 41A). Arms with COUNTER
CLOCK-WISE blade rotation use the fixture with the fixture
arm in the DOWN position (Figure 41B).