TB 9-6685-316-50
f. Remove oil filler plug on testers and fill reservoirs with hydraulic oil MIL-L-7870
(1 quart size, NSN 9150-00-263-3490 or 1 gallon size, NSN 9150-00-273-2397). Tighten
filler plugs. Do not over tighten plug.
g. Bolt TI and standard to workbench approximately 15 inches apart.
h. Loosen vent plugs on deadweight pressure testers before use.
Nominal developed pressure
Nominal
Test Instrument Piston
Standard Piston
Quantity
weight
Low range
High range
Low range
High range
Test
1
2
1
(lb)
(psi)
(psi)
(psi)
(psi)
instrument
Standard
0.5
5
25
5
50
4
4
2.0
20
100
20
200
4
4
9.5
95
475
95
950
1
1
10.0
100
500
100
1000
18
8
0.5 (piston)
5
---
5
---
1
1
0.5 (piston)
---
25
---
50
1
1
1Piston
area 0.1 in 2(low-range piston).
2Piston area 0.02 in. 3(high-range piston).
3Piston area 0.01 in. 3(high-range piston).
NOTE
Unless otherwise specified, verify the results of each test and
take corrective action whenever the test requirement is not
met before continuing with the calibration.
NOTE
Unless otherwise specified, all controls and control settings
refer to the TI.
NOTE
When weight tables appear to be perfectly balanced before
calibration weights are added, try calibration weights first on
one weight table then the other. The balance must be affected
by the specified amount of calibration weights.
7. Leakage
a. Performance Check
(1) Connect equipment as shown in figure 1, using the 0-160 psi pressure gage.
