3-2
4. Carefully remove the detent assembly consisting of two spring covers, two springs
and one shaft with one bearing from recessed location in yoke mounting plate.
5. Slide three spring washers, disk, thrust washer and yoke mounting plate from the
shaft on horizontal arm.
6. Remove thrust bearing and thrust washer from horizontal arm shaft.
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1. Lubricate thrust bearing with small amount of lithium (Fiske 630-A-A or
equal) grease.
2. Install thrust washer and thrust bearing on horizontal arm shaft. See Illustration
3-1.
3. Place yoke mounting plate with tube supports on horizontal arm shaft.
4. Slide thrust washer, disk, and three spring washers onto horizontal arm. (ConĆ
cave side of spring washer facing you)
5. Place two springs and spring covers into recessed position in face of mounting
plate.
6. Place shaft with bearing on the two springs and carefully install cover over end
of horizontal arm shaft.
7. Hold cover in place on horizontal arm shaft to prevent detent assembly from
springing loose and secure with four capscrews.
8. Install the x-ray tube. Refer to Section 2.
9. Install the collimator. Refer to Section 1.