TM 5-3895-383-24
Vibratory Tachometer - Adjust
SMCS Code: 7462-025
Table 16
Required Tools
Part Number
Description
Qty
133-9905
Frequency Meter
1
133-0963
Drum Vibration Tachometer
1
NOTICE
To avoid damage to the vibratory system during testing,
always perform the testing with the vibratory drum on top
of tires or on loose dirt. Tires will simulate a non-
compacted soil condition.
Never operate the vibratory system when the machine is
on concrete.
NOTICE
If a testing time longer than three (3) minutes is required,
rotate the drum periodically in order to lubricate the
eccentric weight shaft bearings.
Illustration 72
Control Console
(1) Vibratory on/off control. (2) Vibratory amplitude control.
NOTE: The hydraulic oil temperature should be at least
38° C (100° F).
1.
Make sure that the parking brake is applied. Ensure
that the propel control lever is in the STOP position.
2.
Move the vibratory amplitude control (2) to the HIGH
AMPLITUDE position.
3.
Start the engine. Run the engine at high idle. Engine
speed should be 2350 ± 50 rpm.
Illustration 73
Steering Console
(3) Vibratory tachometer
4.
Depress the vibratory on/off control (1) on the control
console to the ON position. Read the vibrations per
minute (VPM) from optional VPM gauge (3).
Illustration 74
End of Drum
(4) Drum vibration tachometer.
5.
Read the VPM from 133-0963
Drum
Vibration
Tachometer (4) or the 133-9905 Frequency Meter.
Compare these values with the reading from the
optional VPM gauge (3).
6.
VPM gauge (3) must be calibrated if the values are not
equal.
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