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PAGE 34 — HPLA/HPHA-SERIES 36" WALK-BEHIND TROWEL— OPERATION AND PARTS MANUAL — REV. #3 (07/06/10)
Trowel Arm Adjustment
Shown in (Figure 48) 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 1817. Set the
adjustment tool for a clock-wise blade rotation, meaning the
fixture arm is in the "UP" position.
Figure 48. Trowel Arm Adjustment Tool
Trowel Arm Flatness Test
1. Using a piece of 3/4 inch thick steel plate or any surface which
is
true
and
flat
, check all
six sides
of each trowel arm for
flatness.
2. Check each of the six sides of the trowel arm (hex section
only) using a ten thousands of an inch (max.) feeler gauge
(Figure 47) between the flat of the trowel arm and an
ex
-
tremely flat
test surface.
3. If the trowel arm is found to be
uneven
or
bent
, replace the
trowel arm. A bent trowel will not allow the trowel to operate
in a smooth fluid rotation.
4. Next, check each of the six sides of the round machined shaft
section of the trowel arm. Each section should have the
same
clearance
between the round of the trowel arm shaft and the
test surface.
Figure 47. Trowel Arm Flatness Test
HPLA/HPHA-SERIES 36" TROWEL — MAINTENANCE
Trowel Blade Removal
1. Remove the trowel blades from the trowel arm by removing
the three hex head bolts (Figure 46) from the trowel arm. Set
blades aside.
Figure 46. Trowel Blades
2.
Wire brush
any build-up of concrete from all six sides of the
trowel arm. Repeat this for the remaining three arms.
NOTE
Trowel arms can be damaged by
rough handling or by striking
exposed plumbing or forms while in
operation.
ALWAYS
look-out for
objects which might cause damage
to the trowel arms.
REMOVE
LOCK
WASHER
HEX
HEAD
BOLT
BLADE
ARM