TB 9-6685-363-50
8. Initial Procedure.-Continued
b. Adjustments.-Continued
(a) Disconnect the tubing line from the cell and pump fluid through filling valve until no further evidence of
air bubbles appears at tube connection. Effective purging of air from the cell can also be accomplished by first filling the
cell to approximately its normal gaging, then loosening the tube connection and allowing the oil to purge out through the
loose connection. Repeat several times until there is no further evidence of air bubbles.
(b) With the tubing line connected to the cell, loosen the tubing connection at the indicator end. Pump
fluid into the filling valve of the cell until there is no further evidence of air bubbles at the loose connection. Retighten
connection while pressure is applied.
NOTE
If indicator does not have a plug door on the back of the case, then vent screw
must be serviced from the front by removing bezel, pointer and dial.
(c) Remove plug door on back of TI load indicator case and remove vent screw. Pump fluid into the cell
until no further bubbles appear out of the vent screw opening. Reinstall the vent screw and clean thoroughly.
CAUTION
A damping valve has been installed in the pressure fluid line to the indicating dial
to protect the dial from sudden decrease of line pressure. Misadjustment of this
valve can cause error in dial readings and possible damage to indicating dial.
(8) When gap setting are approximately 0.030 in. (0.0762 cm) and air has been removed from TI, adjust TI
indicating dial pointer to zero by rotating the dial until the pointer indicates zero. The zero setting is achieved by means of
an external knurled knob at the bottom of the bezel; the knob operates a pinion which engages a rack on the dial face;
zero adjustment is equal to 15 percent of the range.
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