Hog Technologies STRIPE SH7500, Operation Manual

Page: 112 / 187

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Section 5 - Scheduled Maintenance
Checking Belt Tension
Sonic Tension Meter Method
The Sonic Tension Meter detects the vibration
frequency in the belt span and converts that mea-
surement into the actual static tension in the belt.
Begin by entering the belt unit weight, belt width,
and the span length. To measure the span vibra-
tion, press the “Measure” button on the meter,
tap the belt span and hold the microphone ap-
proximately 1/4” (.6 mm) away from the back of
the belt. The tension meter will display the static
tension vibration frequency.
If the frequency is lower than the minimum rec-
ommended, the belt should be tightened. If it
is higher than the maximum recommended fre-
quency the belt should be loosened.
Note:
The procedure in this example is for the
Gates Sonic Tension Meter shown. Sonic
meters from different manufacturers or sonic
tension meter APPS available for some smart
phones will require procedures unique those
meters or APPS.
Sonic Meter Belt Tension Frequency
Specifications
UHP Pump Belt Tension Frequency
New Belt = 58-61 Hz
Used Belt
(More than 20 hours of operation) = 50-53 Hz
Blower Belt Tension Frequency
New Belt = 36-37 Hz
Used Belt
(More than 20 hours of operation) = 30-32 Hz
Refer to the belt manufacturer’s manual for addi-
tional maintenance information on the drive belts.
Blower & UHP Pump Belt Guards & Access Plates
Drive Belt Adjustment Procedures
Vacuum Blower
The vacuum blower is on adjustable mounts. A
threaded adjusting bolt on the blower mount is
used for adjusting the blower drive belt tension.
Make sure the waterblasting system is shutdown
and the truck is in the service position. Then use
the following procedure to adjust the vacuum
blower belt.
1. Loosen the four bolts in the slotted holes on
the mounting plate just enough to allow the
plate to move. Make sure not to loosen them
too much.
2. Loosen the blower mount adjusting bolt jam
nut and rotate the adjusting bolt to adjust the
belt to the proper specification. Use a spring
scale tester or sonic tension meter to achieve
proper tension.
4. Tighten the bolts in the slotted holes and the
adjusting bolt jam nut.