REV 5 DIRECTION 2173225-100
3-1
SECTION 3
SERVICING THE HORIZONTAL ARM
This section provides procedures covering the removal and installation of the field
serviceable assemblies and parts comprising the horizontal arm assembly.
3Ć1 Yoke Assembly Removal
Equipment Damage!
CAUTION
Secure the horizontal arm before removing components from the arm.
Removing weight allows the counterweight to descend rapidly and the arm to
ascend rapidly possibly causing damage to the unit and personal injury. Use
Counterweight Lift Tool 46-303491G1.
1. Remove the collimator. Refer to Section 1.
2. Remove the X-ray tube. Refer to Section 2.
EYE INJURY!
WEAR EYE PROTECTION WHEN REMOVING THE YOKE ASSEMBLY,
SOME PARTS ARE SPRING LOADED AND MAY CAUSE INJURY.
3. Holding cover in place, remove four capscrews securing cover to end of horizonĆ
tal arm shaft. A spring loaded detent positioning assembly is retained by the
cover. Reach behind the cover, hold the detent assembly in place and carefully
remove cover. See Illustration 3-1.
ILLUSTRATION 3-1
YOKE ASSEMBLY
SPRING COVER
SPRING WASHER
BEARING
SPRING
COVER
1/4-20 x .625 HEX SOCKET
HEAD CAPSCREW
HORIZONTAL ARM ASSEMBLY
MOUNTING
PLATE
SHAFT
THRUST BEARING
DISC
THRUST
WASHER
THRUST
WASHER
RIGHT TUBE
SUPPORT
LEFT TUBE
SUPPORT
WASHER
WARNING
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