PAGE 33 — JTNSW20-24HTCSL SERIES RIDE-ON TROWEL • OPERATION MANUAL — REV. #1 (3/24/16)
MAINTENANCE
Figure 31 illustrates the "correct alignment " for a spider
plate (as shipped from the factory).
Figure 31. Correct Spider Plate Alignment
2. Start engine, and bring trowel blades up to full speed
and look for the following conditions:
• Does the trowel have a perceived rolling or bouncing
motion?
• Does the guard ring “rock up and down” relative to
the ground?
Trowel Arm Removal
1. Each trowel arm is held in place at the spider plate by
a hex head bolt (with zerk grease fitting). Remove the
hex head bolt/zerk grease fitting from the spider plate.
(Figure 32)
2. Remove the trowel arm from the spider plate.
Figure 32. Removing Zerk Grease Fitting
3. Should the trowel arm inserts (bronze bushing ) come
out with the trowel arm, remove the bushing from the
trowel arm and set aside in a safe place. If the bushing
is retained inside the spider plate, carefully remove
the bushing.
ARM
GEARBOX
SURFACE
BLADE
MOUNTING
BAR
CORRECT ALIGNMENT
BLADES ARE FLAT
SPIDER
PLATE
ZERK
FITTING
4. Examine the bronze trowel arm bushing insert (Figure
33), clean if necessary. Replace bushing if out-of-round
or worn.
Figure 33. Bronze Bushings
Trowel Blade Removal
1. Remove the trowel blades from the trowel arm by
removing the three hex head bolts (Figure 34) from
the trowel arm. Set blades aside.
Figure 34. 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.
