mAINTENANCE
Engine Tune-Up
See your engine manual for specific information on tuning up your engine.
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
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.
PUMP ACTUATION
LEVERS
HYDRAULIC
PUMP
TOP VIEW
ADJUSTMENT
Checking/Adjusting Trowel Speed
Because the two hydraulic drive motors operate independent of each other, the trowel speed between them may vary.
CONNECTING
ROD
ADJUSTMENT
NUT
NUT
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
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.
SET
BOLT
Figure 28. Trowel Speed Control
(Set Bolt Location)
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
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
page 32 — eHtx44y
