Rayco RG74T-R Operator, Service, Maintenance Manual page 48

RG74T-R Operator · Service · Maintenance
Maintenance
Cutting Wheel Belt - Check &
Adjust Tension
A MOVING BELT IS VERY POWERFUL AND
DANGEROUS. KEEP AWAY FROM A MOVING BELT
AT ALL TIMES! EXTREME CAUTION MUST BE USED
TO PREVENT DEATH OR SERIOUS INJURY. FOR
THE SAKE OF SAFETY, THE BELT GUARD COVER
MUST ALWAYS BE IN PLACE WHEN THE ENGINE
IS RUNNING. BEFORE BEGINNING TO CHECK OR
ADJUST THE BELT: SHUT-DOWN THE MACHINE,
INSURE THAT ALL MOVING PARTS HAVE COME TO
A HALT, REMOVE THE KEY FROM THE IGNITION,
AND PLACE THE KEY IN SAFEKEEPING.
Using a belt gauge, check the Belt tension by depressing
the Belt at the center of the span.
1. Remove the Belt guard cover (1). The cutting wheel
must be free to rotate (eg. not resting on ground).
• The belt should deflect 3/8"-1/2" when 20 lbs. force
is applied.
• Use 20 lbs. at 3/8" deflection when installing a new
belt. After approximately 5-10 hours it will begin to seat
48
1
in and drop down into the 12-15 lbs. range at 1/2"
deflection.
Smart Tension App
Attention iPhone users. Mitsuboshi as
designed an app for Apple iPhone users
to use for checking tension for timing belts,
V-Ribbed Belts, Flat Belts, etc.
Open your Smart Tension App
• Select the "Other" option
• Select the "Timing Belt" option
• Tap on Belt Type, then choose the "GigaTorque GX" belt.
• Tap on Belt Profile, then choose "G14M".
• Tap on Belt Width, then choose "68".
• Tap in the Span Length box. The span length on your
RG74T-R will be 21.5in.
• The start screen will appear, to start the measurement:
Tap "Start" and hold the iPhone at the measuring position,
before the belt is made to vibrate. "Start" button changes
to measuring..... and the microphone starts to pick up
a sound wave.
Note: Hold the microphone of the (bottom of the phone)
iPhone roughly 1/4 - 3/8" (10mm) from the center of the
span length.
• Simply flick the belt with your finger or softly tap it with
a wrench to make your belt vibrate.
When the microphone picks up a sound wave, the sound
pressure level meter flashes and the detected frequency
and the calculated belt tension will display. When the
measurement is completed, "Done" will appear.
There are more instructions available on the app itself.
Ref: Belt Tension Frequency is 36-38Hz