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4. Rotate the tilt table pointer counter clockwise slowly until the "bubble" in the
display is on the verge of setting off the "Grade Alarm".
5. Without moving the pointer, position the tilt table plate so that a major division
is under the pointer.
6. Slowly rotate the pointer clockwise until the "bubble" in the display is on the
verge of setting off the "Grade alarm".
7. Observe the total distance of the pointer travel. 100 arc-seconds is the proper
spec. ±10 seconds.
Note: Adjust the pots as required to obtain the proper specifications.
#109 Motor Removal and Replacement
Note: For model L1-S, see procedure # 109-S
Tools required: 5/64" hex driver Time:
9/64" hex driver .75
.050" hex driver
Soldering iron
1/4" socket driver
Low profile 1/4" wrench
A. Removal
1. Remove the battery cover and batteries.
2. Using a 9/64" hex driver, remove halo assembly support screws.
3. Remove the halo assembly from the main housing. Note: do not
remove the screws from the post. This will keep them in the proper
places. The screws are not necessarily interchangeable. The lower screw
must be shorter by 1 thread and will protrude into the housing and contact
the diode housing if it is not shortened.
4. Using a 5/64" hex driver, remove the plastic top housing from the halo
assembly.
5. Using a .050" hex driver, loosen the set screw in the penta mirror base
and remove the mirror assembly.
6. Re-attach the halo assembly to the main housing. (ensure that the
spacing washers are between the support bar and the housing)
Remove the wires from the motor terminals.
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