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PAGE 32 — EHTX44Y RIDE-ON TROWEL • OPERATION MANUAL — REV. #0 (01/16/13)
MAINTENANCE
Engine Tune-Up
See your engine manual for specific information on tuning
up your engine.
Checking/Adjusting Trowel Speed
Because the two hydraulic drive motors operate independent
of each other, the trowel speed between them may vary.
If the unit’s steering is difficult to control, or if one spider
is spinning noticeably faster or slower than the other,
the trowel speed may need to be checked. It is also
recommended that the trowel speed be checked at least
once a year.
Trowel speed adjustment is a two-step process. First, the
left side should be checked and/or adjusted. Second, the
right side should be adjusted to match the left.
Left Side Trowel Speed Adjustment
The left side trowel speed is adjusted by the set bolt
(Figure 28) located under the operator's platform, and is
accessed by opening the storage panel door. Backing
the set screw out decreases the left side trowel speed;
screwing it inward increases the speed.
Figure 28. Trowel Speed Control
(Set Bolt Location)
NOTICE
See the engine manual supplied with your machine
for appropriate engine maintenance schedule and
troubleshooting guide for problems.
CAUTION
ALWAYS disconnect battery cables before attempting
any service or maintenance on the ride-on trowel.
SET
BOLT
Right Side Trowel Speed Adjustment
The right side trowel speed is adjusted by changing the
length of the connecting rod (Figure 29) on the pump
actuation levers.This is accomplished by adjusting the right
side adjustment nut.
Figure 29. Pump Adjustment Components
This rod is basically a turnbuckle, (Figure 29). Rotating it
in one direction increases the length and corresponding
trowel speed. Rotating it the opposite direction decreases
the length and trowel speed. The right side trowel speed
should be within 3 rpm of the left.
A good starting point in the adjustment process is to adjust
the rod such that both trowels begin to rotate at the same
time when the foot pedal is slowly depressed. This will,
generally, get the speeds fairly close; close enough for use
if instrumentation is unavailable (i.e. on the job site). From
this point on, some form of instrumentation is required to
verify that the trowel speeds are within tolerance. A strobe
or magnetic pickup type speed indicator is recommended
to verify the speeds.
The trowel speeds should be adjusted on a dry concrete
floor with the blades pitched flat. Units with the Yanmar
turbocharged engine should be set at 140-160 RPM with
the engine at full speed.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
CONNECTING
ROD
PUMP ACTUATION
LEVERS
RIGHT-SIDE
ADJUSTMENT
NUT
LEFT-SIDE
ADJUSTMENT
NUT
HYDRAULIC
PUMP
TOP VIEW