MULTIQUIP Whiteman Series Operation Manual page 40

The easiest and most consistent way to make adjustments
on the trowel arm fingers is to use the Trowel Arm Adjustment
Fixture (P/N 9177). It comes with all the hardware necessary
to properly accomplish this maintenance, and instructions
on how to utilize this tool.
If a trowel arm adjustment fixture is not available and
immediate adjustment is necessary, temporary field
adjustment can be made, if you can see or feel which blade
is pulling harder, by adjusting the bolt that corresponds to
that blade.
A better way to determine which blades need adjustment
is to place the machine on a known FLAT surface (e.g.
steel plate) and pitch the blades as flat as possible. Look at
the adjustment bolts. They should all barely make contact
with the lower wear plate on the spider. If you can see that
one of them is not making contact, some adjustment will
be necessary.
Adjust the "high" bolts down to the level of the one that is
not touching, or adjust the "low" bolt up to the level of the
higher ones. If possible, adjust the low bolt up to the level
of the rest of the bolts. This is the fastest way, but may not
always work. Verify after adjustment that the blades pitch
correctly.
Blades that are incorrectly adjusted often will not be able
to pitch flat. This can occur if the adjusting bolts are raised
too high. Conversely, adjusting bolts that are too low will
not allow the blades to be pitched high enough for finishing
operations.
If, after blade pitch adjustments have been made, the
machine is still finishing poorly, blades, trowel arms, and
trowel arm bushings should be checked for adjustment,
wear, or damage. See the following sections.
CHANGING BLADES
It is recommended that ALL the blades on the entire
machine are changed at the same time. If only one or
some of the blades are changed, the machine will not
finish concrete consistently and the machine may wobble
or bounce.
1. Place the machine on a flat, level surface. Adjust
the blade pitch control to make the blades as flat as
possible. Note the blade orientation on the trowel arm.
This is important for ride-on trowels as the two sets
of blades counter-rotate. Lift the machine up, placing
blocks under the main guard ring to support it.
PAGE 40 — HHNG5 RIDE-ON TROWEL • OPERATION MANUAL — REV. #1 (07/05/18)
2. Remove the bolts and lock washers on the trowel arm,
then remove the blade.
3. Scrape all concrete and debris from the trowel arm.
This is important to properly seat the new blade.
4. Install the new blade, maintaining the proper orientation
for direction of rotation.
5. Reinstall the bolts and lock washers.
6. Repeat steps 2–5 for all remaining blades.
CLEAN-UP
Never allow concrete to harden on the power trowel.
Immediately after use, wash any concrete off the trowel
with water. Be careful to not spray a hot engine or muffler.
An old paint brush or broom may help loosen any concrete
that has started to harden.
TROWEL ARM ADJUSTMENT
NOTICE
The following procedure should be performed to adjust
trowel arms when it becomes apparent that the trowel
is finishing poorly or in need of routine maintenance.
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' × 5', 3/4 inch thick, flat, steel plate should be
used for testing.
Some indications of poor concrete finishing are incorrect
trowel arm alignment, worn spider bushings, or bent trowel
arms:
Does your trowel exhibit the following?
„ Are the blades wearing unevenly? Is one blade
completely worn out while the others look new?
„ Do the guard rings rock up and down while the machine
is running?
„ Does the machine have a perceptible rolling or bouncing
motion when in use?
MAINTENANCE