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HHXD5 RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (05/04/12) — PAGE 37
MAINTENANCE
Blade Pitch
Matching Blade Pitch for Both Sets of Blades
Sometimes it may be necessary to match blade pitch
between the two sets of blades. There are some signs
that this may be necessary. For example, the differences
in pitch could cause a noticeable difference in finish quality
between the two sets of blades, or, the difference in blade
pitch could make the machine difficult to control. This is
due to the surface area in contact with the concrete (the
blade set with the greater contact area tends to stick to the
concrete more).
Single Pitch
On a Single Pitch trowel each spider assembly can be
pitched individually, forcing the operator to constantly make
adjustments on each pitch tower.
Twin Pitch
TM
Trowels equipped with Twin Pitch
TM
Controls may need
to have blade pitch between the two sets of blades
"syncronized". If the blades need to be syncronized this
is easily accomplished by performing the following. Refer
to Figure 33.
1. Lift the pitch adjustment handle on either side. Once
lifted, that side is now disconnected from the Twin
Pitch system.
2. Adjust to match the opposite side.
3. When adjusted, lower the handle to Twin Pitch
operating position.
CAUTION
When turning an adjustment handle, do not force it to
turn or damage to the cable may occur. If the cable
starts to noticeably twist this is a good indication that
one side is either all ready at full pitch or it is bound up
due to concrete, debris, or corrosion.
Figure 33. Pitch Towers
Blade Pitch Adjustment Procedure
Maintenance adjustment of blade pitch is made by adjusting
a bolt (Figure 34) on the arm of the trowel blade finger.
This bolt is the contact point of the trowel arm to the lower
wear plate on the thrust collar. The goal of adjustment is to
promote consistent blade pitch and finishing quality.
Look for the following indications if blades are wearing
unevenly. If so, adjustment may be necessary.
Is one blade is completely worn out while the others
look new?
Does the machine have a perceptible rolling or bouncing
motion when in use?
DISENGAGED
(ONE SIDE)
OPERATING POSITION