INSTALLATION
MANUAL
MODEL 773 SERIES
REINFORCED CRASH ARM
B&B ARMR: A Division of B&B Roadway and Security Solutions
Page 31 of 38
0773-9001 Rev D
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MODEL 773
Symptom
Actions
Barrier does not raise up
when commanded
1.
Verify power is supplied to the unit and the circuit
breaker is set.
2.
Verify the arm is unlocked from the receiver stanchion.
3.
Check electrical connections are correct and tight.
4.
Check for binding between arm and stanchions. Check
connection of linkage between arm and drive unit.
5.
Cycle circuit breaker or check fuse(s).
6.
If using the onboard controls confirm the correct
sequence is followed.
7.
Verify safety devices are not missing or have activated.
Barrier does not close
when commanded
1.
Verify power is supplied to the unit.
2.
Verify safety devices have not activated.
3.
Cycle circuit breaker or check fuse(s).
4.
Check electrical connections are correct and tight.
5.
If using the onboard controls confirm the correct
sequence is followed. (see EPU/HPU Installation or
O&M manual).
Barrier makes noise
during operation
1.
Check linkage between arm and drive unit. Be sure it is
secure and properly lubricated.
2.
Check hinge area for debris and proper lubrication.
3.
Check drive unit clevis pins for lubrication.
4.
Check bearing grease.
Barrier moves too slowly
1.
Check for mechanical binds.
2.
Check flow control valve (773Hx Series).
3.
In extreme cold temperatures, a different hydraulic fluid
may be required to keep viscosity constant (773Hx
Series).
4.
If using onboard controls, confirm the correct sequence is
followed. (see EPU/HPU Installation or O&M manual).
Table 4 – 773(Ex, Hx, MD) Troubleshooting
