Multiquip CA4HM - Manual (Page 29)

CA4HM WALK-BEHIND TROWEL — OPERATION MANUAL — REV. #3 (10/28/10) — PAGE 29
Figure 32. Trowel Arm Adjustment Tool
Changing a Blade
We recommend that all the blades be changed at the same
time . The machine may wobble or bounce if only some of the
blades are changed at one time.
1. Place the machine on a flat, level surface. Adjust the blade
pitch control to make the blades as flat as possible. Note the
blade orientation on the trowel arm.
1. Remove the two bolts and lock washers that secure the blade
to the trowel arm. Remove the blade.
2. Using a wire brush, scrape all concrete particles and foreign
debris from the trowel arm.
3. Install the new trowel blade onto the trowel arm. Make sure
blade is installed correctly, maintaining the proper orienta-
tion for direction of rotation.
4. Reinstall the two bolts and lock washers that secure the
blade to the trowel arm. Tighten both bolts securely.
5. Repeat steps 1 - 4 for all remaining blades.
Hand Clutch Adjustment
This trowel is equipped with a hand-operated clutch that is a belt-
tightener type clutch. It operates by removing
slack in the V-belt
which then transmits power from the engine to the gearbox.
There are two reasons to adjust the hand clutch: 1) operator
comfort; 2) initial belt stretch and break-in.
The easiest and most simple adjustment is to adjust the clutch
cable housing using the adjustment nut (Figure 32) located on the
clutch lever. Rotating the nut provides either more or less
(depending upon the direction of rotation) clutch engagement.
Hand Clutch Disengagement
1. Start the trowel as outlined in the " Initial Start-up " section in
this manual. Move the throttle lever so that the engine is
running about 1/4 to 1/3 of full speed.
2. Grip the trowel handle firmly and carefully engage the clutch
by squeezing the clutch lever toward the handle with your left
hand. After the trowel is stabilized and you feel comfortable
with its operation, use your right hand to adjust the housing
adjustment nut.
3. Rotating the nut so that it backs out of the lever housing
increases the engagement and also the squeezing force
required to keep it engaged.
Too much squeezing force may cause premature hand
fatigue. Too little squeezing force may cause belt slippage
and premature belt wear. Each operator should experiment
with the adjustment to get the optimum combination of
squeeze force and belt grip.
4. After initial break-in (approximately 8 hours) the above
procedure should be repeated to attain optimum operator
comfort and belt wear.
5. After considerable belt wear, the adjustments mentioned
above may have a little or no effect on clutch engagement. If
this is the case, the belt should be replaced.
MAINTENANCE
Before removing the blades, please note the orientation
of the blade on the trowel arm.
NOTICE
Check the manual clutch occasionally for proper operation.
Checking operation of the manual clutch at the beginning of
operation and periodically serves as a safety check verifica-
tion.
NOTICE
NEVER attempt to override the manual clutch by using
tape or other means to hold down the clutch lever. Doing so
may cause SEVERE INJURY.
WARNING