Multiquip HTX44Y5 - Manual (Page 35)

HTX-YANMAR DIESEL • RIDE-ON POWER TROWEL — OPERATION MANUAL — REV. #0 (07/06/06) — PAGE 35
/02) — PAGE 35
Figure 29. Turnbuckle & Adjustment Nuts
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.
HTX-YANMAR DIESEL — MAINTENANCE
Figure 27. Trowel Speed Control
Right Side Trowel Speed Adjustment
The right side trowel speed is adjusted by changing the length
of the connecting rod on the pump actuation levers, (Figure 28).
Figure 28. Pump Connecting Rod & Levers
A
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 located
under the operator's platform, (Item A, Figure 27) and accessed
by opening the storage panel door. Backing the set screw out
decreases the left side trowel speed; screwing it inward increases
the speed.
1. Hydraulic Pump (Top View)
2. Pump Actuation Levers
3. Adjustment Nuts
4. Turnbuckle Assembly
3
4
1
2
1. Pump Actuation Levers
2. Connecting Rod
1
2