CA4HC WALK-BEHIND TROWEL • OPERATION MANUAL — REV. #1 (06/24/20) — PAGE 37
2. Wipe the Zerk grease fitting clean to prevent abrasive
material from entering the fitting during lubrication.
3. Lubricate the Zerk grease fitting with 1 to 1½ shots
of multipurpose grade grease.
DO NOT
overgrease.
Replace the Zerk fitting cap when finished.
4. Repeat steps 1–3 for the remaining grease fittings on
the spider assembly.
Blade Pitch Adjustment
Perform maintenance adjustment of blade pitch using a
bolt on the trowel arm lever (Figure 44). This bolt is the
contact point of the trowel arm with the lower wear plate
on the thrust collar. The goal of adjustment is consistent
blade pitch and finishing quality.
Figure 44. Blade Pitch Adjustment Bolt
Look for the following indications when determining if blade
pitch adjustment is necessary:
Are the blades wearing out unevenly (e.g. one blade is
completely worn out while the others look new)?
Does the machine have a perceptible rolling or bouncing
motion while in use?
Does the guard ring rock up and down while the machine
is in use?
SPIDER
PLATE
TROWEL
ARM
TROWEL ARM
LEVER
TROWEL
BLADE
BLADE PITCH
ADJUSTMENT
BOLT
MAINTENANCE
Once it has been determined that blade pitch adjustment
is required, do the following:
1. Place the trowel on a flat, level surface, with blocks
under the main guard ring for support. Any uneven
spots in the floor or debris under the trowel blades will
cause an incorrect perception of adjustment. Ideally,
a 5 ft. × 5 ft. (1.5 m × 1.5 m), 3/4-inch thick,
flat
steel
plate should be used.
2. Pitch the blades as flat as possible (Figure 45).
The pitch adjustment bolts should barely contact
(0.10 inch maximum clearance) the lower wear plate.
All adjustment bolts should be spaced the same
distance from the lower wear plate. If any one of the
bolts does not make contact, adjustment is necessary.
Figure 45. Blades Pitched Flat (Correct)
3. Adjust the ‘high’ bolts down to the level of the bolt that
is not touching, or adjust the ‘low’ bolt up to the level of
the higher ones. Whenever possible, adjust the ‘low’ bolt
up to the level of the rest of the bolts. This is the fastest
method, but it may not always work. After adjustment,
verify that the blades pitch correctly.
If the trowel still finishes poorly after blade pitch adjustment,
the blades, trowel arms, and trowel arm bushings should
be inspected for improper adjustment, wear, or damage.
GEARBOX
BLADE
TROWEL
ARM MOUNTING
BAR
LOWER
WEAR PLATE
PITCH
ADJUSTMENT
BOLT
STEEL TEST
SURFACE
NOTICE
Incorrectly adjusted blades will often be unable to pitch
flat. This can occur if the adjustment bolts are raised
too high. Conversely, adjustment bolts that are too low
will prevent the blades from being pitched high enough
for finishing operations.
To
order
go
to
Discount-Equipment.com
