22
A. See maintenance section.
#103 Base Plate Removal and Replacement
Tools required: 3/32" hex driver Time:
1/8" hex driver .25
A. Removal
1. Using 1/8" hex driver, remove 10-32 spring tension screw.
2. Using 3/32" hex driver, remove 4-40 positioning screw.
3. Rotate base plate 1/8 turn counter clock wise until x-axis leveling
screw cradle is free of x-axis leveling screw. Slide plate forward to clear
s-axis leveling screw.
A. Replacement
1. Slide base plate onto s-axis leveling screw.
2. Rotate base plate clockwise until x-axis leveling screw cradle is around
x-axis leveling knob.
3. Insert 4-40 screw (with washer and o-ring) through base plate into
brass support post.
a. Tighten screw just enough to expand the size of the o-ring to the
size of the washer. DO NOT OVER TIGHTEN
4. Insert spring tension screw through base plate into instrument plate.
a. Tighten screw until bushing is flush with end of tripod receptacle.
#105 Slope Sensor Removal and Replacement
Tools required: 7/64 hex driver Time:
Phillips head driver .5
Needle nose pliers
Flat blade driver
Soldering iron
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