LEAK TEST SETUP.

TM 9-2920-252-34&P

3-11. LEAK TEST OF GENERATOR (CONT)

1. LEAK TEST SETUP.

f. Close chamber shut-off valve and begin timing a

a. Install cover of test fixture with preformed packing

two-minute interval.

and secure in place with clamp.

g. At end of two-minute inverval, note loss of

b. Install plug and preformed packing in oil pump

pressure. If loss of pressure does not exceed 3

supply port.

psi, the waterproofness of generator is

acceptable.

c. Install fittings with preformed packing into oil

outlet port, and connect tubing between fittings

h. Use soap solution applied to seal areas of

and tee on cover.

generator while pressurized to 10 psi to locate

any source of excessive leakage.

d. Close-connect

measured

chamber

approximately one cubic foot with a 0-10 psi

i. If source of excessive leakage is a sealed area

pressure gage and a shut-off valve at its input to

that is authorized for DS/GS maintenance,

remaining port of tee on fixture cover.

disassemble and re-assemble with new seals as

applicable. Perform leak tests again.

e. Pressurize generator and chamber with dry air to

10 psi.

TA315018

3-20