PRO SERIES WALK-BEHIND TROWELS • OPERATION MANUAL — REV. #0 (9/21/17) — PAGE 47
5. Figure 69 illustrates incorrect spider plate alignment
due to improper adjustment, worn spider bushings, or
bent trowel arms.
Figure 69. Blades Pitched Flat (Incorrect)
Spider Removal
Refer to Figure 70.
Figure 70. Spider Removal
1. Loosen the cone point square head set screw and
attached jam nut on the side of the spider assembly.
NO
LOWER
WEAR PLATE
PITCH
ADJUSTMENT
BOLT
“DISHED” EFFECT ON
FINISHED CONCRETE
GEARBOX
GEARBOX
SHAFT
THRUST COLLAR
BEARING
THRUST COLLAR
WITH BUSHING
LOWER
WEAR PLATE
SPIDER
PLATE
WEAR RING
YOKE
ARM
JAM NUT
CONE POINT
SQUARE HEAD
SET SCREW
2. Carefully lift the upper trowel/gearbox assembly off of
the spider assembly. A light tap with a rubber mallet
may be necessary to dislodge the spider from the main
shaft of the gearbox.
Blade Replacement
It is recommended to replace
all of the trowel blades at the
same time. If only one or some of the blades are changed,
the machine may wobble or bounce and will not finish
concrete consistently.
1. Place the trowel on a flat, level surface, with blocks
under the main guard ring for support.
2. Remove the bolts and lock washers from each of the
trowel arms, then remove the blades as shown in
Figure 71.
Figure 71. Blade Removal
3. Wire brush and remove all concrete and debris from
all six sides of each of the four trowel arms. This is
important to properly seat the new blades.
4. Install the new blades, maintaining the proper blade
orientation as noted during removal. Secure with the
bolts and washers that were removed earlier.
NOTICE
Please note the orientation of each blade on the trowel
arm before removing.
TROWEL ARM
TROWEL
BLADE
BLADE
ATTACHMENT
BAR
MAINTENANCE
