TM 5-3895-373-34
Table 2-8. Vibration System Troubleshooting - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
EXTENSION SCREED VIBRATORS FAIL TO OPERATE.
Step 1.
Check if both extension screed vibrators fail to operate.
If both extension screed vibrators fail to operate, refer to MALFUNCTION 1. VIBRATORS FAIL
TO OPERATE OR OPERATE SLUGGISHLY.
WARNING
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.
NOTE
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
being tested.
Step 2.
Remove screed cover plate per TM 5-3895-373-20. Check flow at outlet of screed vibration flow
divider. Install hydraulic system tester at outlets (1 and 2) for flow tests per TM 9-4940-46-14. Test
flow for right extension screed vibrator at outlet (1) and for left extension screed vibrator at outlet (2).
If flow rate is less than 2.5 gpm (9,5 l/min) or more than 3.4 gpm (12,9 l/min) replace/repair
vibration flow divider per paragraph 2.77.
If flow rate is at least 2.5 to 3.4 gpm (9, 5 to 12,9 l/min), replace extension screed vibration motor
per TM 5-3895-373-20 and repair per paragraph 2.76.
Step 3.
Disconnect hydraulic system tester per TM 9-4940-468-14. Reconnect all hydraulic lines. Install
screed cover plate per TM 5-3895-373-20.
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