Table 2-8 lists common malfunctions associated with the
vibration system that may be found during operation or
maintenance of the paving machine. Perform the tests/
inspections and corrective actions for a particular
malfunction in order given.
This table cannot list all possible malfunctions that may
occur, nor all tests, inspections, or corrective actions. If
a malfunction is not listed or is not corrected by listed
corrective actions, notify your supervisor.
Table 2-8. Vibration System Troubleshooting.
TEST OR INSPECTION
VIBRATORS FAIL TO OPERATE OR OPERATE SLUGGISHLY.
Hydraulic oil can be moderately flammable and can be an irritant to skin, eyes, and
respiratory system. Avoid prolonged exposure. Eye protection and rubber gloves
must be worn when working with hydraulic oil.
The following test requires use of a hydraulic system tester. Install tester in-line at
flow test point indicated by each individual test per TM 9-4940-468-14. Make sure
ratings of all fittings and hoses used are adequate for maximum pressures and flows
Open center top right and center top left access doors per TM 5-3895-373-10. Open rear top right
access door per TM 5-3895-373-10. Open rear top left access door per TM 5-3895-373-10. Check
vibration system hydraulic pressure. Install hydraulic system tester at outlet (1) for pressure test per
TM 9-4940-468-14. With paving machine on and screed vibration control valve fully opened, check
for pressure at vibration control valve outlet (1). Pressure should be 2000 psi (13 970 kPa). If
hydraulic pressure is at 2000 psi (13 970 kPa), leave hydraulic system tester installed and continue
to step 2.
If pressure is not 2000 psi (13 970 kPa), adjust vibration relief valve per paragraph 2.51. If no
pressure is present, replace/repair faulty vibration solenoid valve per paragraph 2.47.