TB 9-4931-228-24
(2) Remove filler plug and fill hydraulic comparator with sebacate or hydraulic oil
(MIL-L-7870A).
(3) Reinstall filler plug and secure hydraulic comparator to an adequate workbench.
Level comparator.
(4) Connect TI to one port of hydraulic comparator.
Connect other port of
comparator to appropriate input of hydraulic pressure standard.
NOTE
The TI and the hydraulic pressure standard should be located
so that reference plane of each instrument is the same height
to eliminate an error caused by hydraulic head pressure.
(5) Operate hydraulic comparator to obtain TI indications listed in table 5. The
hydraulic pressure standard will indicate within limits specified.
(6) Adjust hydraulic comparator for zero indication on TI.
b. Adjustments. No adjustments can be made.
Table 6. Pressure Check
TI
Hydraulic pressure standard
(psi)
Min
Max
90
82.5
97.5
150
142.5
157.5
200
170.0
230.0
400
370.0
430.0
600
570.0
630.0
1000
750.0
1250.0
3000
2750.0
3250.0
5000
4750.0
5250.0
15. Final Procedure
a. Release any applied pressure before disconnecting hoses.
b. Deenergize and disconnect all equipment.
c. Annotate and affix DA label/form in accordance with TB 750-25.