GENERAL MAINTENANCE INSTRUCTIONS
Se c t ion I . SPECI AL T OOLS AN D EQU I PM EN T
3 5 . Spe c ia l T ools a nd Equipm e nt
No special tools or equipment are required by direct and general support and depot main-
tenance personnel to perform maintenance on the surveying target set.
3 6 . Dire c t a nd Ge ne ra I Support a nd De pot M a int e na nc e Re pa ir Pa rt s
Direct and general support and depot maintenance repair parts and special tool lists are
listed and illustrated in appendix IV.
3 7 . Spe c ia lly De signe d T ools a nd Equipm e nt
No specially designed tools or equipment are required by direct and general support and
depot maintenance personnel to perform maintenance on the surveying target set.
Se c t ion I l. T ROU BLESH OOT I N G
and its components. Each trouble symptom
3 8 . Ge ne ra l
stated is followed by a list of probable causes
This section provides information useful in
of the trouble. The possible remedy recom-
diagnosing and correcting unsatisfactory oper-
mended is described opposite the probable
cause.
ation or failure of the surveying target set
3 9 . Le ve ling Sc re w s T oo T ight or T oo Loose
Possible
remedy
Probable cause
Leveling screws worn _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Replace leveling screws (para 44)
Leveling screws out of adjustment _ _ _ _ _ _ _ _ _ _ _ _ _Adjust leveling screws (para 44)
4 0 . Circ ula r Le ve l Bubble Doe s N ot St a y in Ce nt e r
Probable cause
Possible remedy
Circular level out of adjustment_ _ _ _ _ _ _ _ _ _ _Adjust circular level (para 46)
Defective level _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Replace level (para 46)
4 1 . T a rge t Le ve l Bubble Doe s N ot St a y in Ce nt e r
Probable cause
Possible
remedy
Circular level out of adjustment _ _ _ _ _ _ _ _ _ _ _ _ _Adjust circular level (para 46)
Target level assembly out of adjustment _ _ _ _ _ _ _ _ _ _ Adjust target level assembly (para 50)
Defective vial_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Replace vial (para 50)
AGO 10139A
