Horizontal Cross Arm Motion
Functional Tests
Unlock the Horizontal Cross Arm and extend it about eight inches forward from the normal transport position. (The Cross Arm
has a calibrated extension scale that aids in precise positioning.) To extend the Cross Arm, move the brake to the UNLOCK
position, push the Cross Arm into position, and set the brake handle to the LOCK position. Verify that the Cross Arm does not
move after you lock it in place.
Note: The Cross Arm brake uses a cam with 90 degrees of travel. Attempting to push the handle past its 90-degree lock
position will not apply the brake more securely, but may instead result in damage to the mechanism.
CAUTION: Make sure Cross Arm is fully retracted and brake is set before moving C-Arm. Equipment damage or personal
injury may otherwise result.
Fault Isolation
A malfunctioning Cross Arm Brake can prevent you from securing the Cross Arm, or it can prevent you from moving the Cross
Arm at all. To confirm a Cross Arm brake failure, remove the Cross Arm bearing cover (refer to Replacement chapter, in this
manual), and inspect the brake mechanism.
Adjustment
The Cross Arm brake requires no initial or periodic adjustment.
Miscellaneous
Not applicable
4
Service
Periodic Maintenance
Contents
Schematics
Illustrated Parts
Installation
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