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CHAPTER 5 DIRECT SUPPORT MAINTENANCE
Up
TM-5-6675-329-13-P Self-Leveling Surveying Level (Wild Heerbrugg Model NA2-80) NSN
Next
Table 5-2. Eyepiece Maintenance Instructions
TM 5-6675-329-13 & P
Table 5-1. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Blurred image is seen through the eyepiece.
None (lens internal to the telescope housing is broken).
Automatic level NA2-80 must be replaced.
Automatic Level NA2-80 is wobbly on the Tripod GST-40 base.
Check Tripod GST-40 Central Fixing Screw and Central
Fixing Screw Retainer.
Replace defective part(s).
Focus Drive does not continuously drive focusing lens.
Check Focus Drive Assembly (item 1, Figure 5-3) for
defects.
Replace defective component.
Horizontal Drive does not drive Automatic Level NA2.
Check Horizontal Drive Components (Figure 5-4) for
defects.
Replace defective component(s).
Section III: MAINTENANCE PROCEDURES
5-5
GENERAL
Maintenance procedures in this section include removal, cleaning, inspection and installation of the eyepiece,
Objective Housing, Focus Drive, Horizontal Drive Components and Tripod GST-40 assemblies.  All maintenance
procedures can be performed by one maintenance technician.
5-6
EYEPIECE ASSEMBLY MAINTENANCE INSTRUCTIONS (Figure 5-1)
This task covers:
a.
Removal
b.
Cleaning
c.
Inspection
d.
Installation
Initial Setup
Applicable Configuration
5-2

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