Assembly - TM-9-6685-202-140067

TM 9-6685-202-14

6085. Do not apply oil directly to the surface since even

water and then in distilled or demineralized water.

a small amount will catch dust.

h. Dry all parts with clean chamois skin MP/N KK-

4-14. Assembly

C-300.

In general the reassembly of the individual

subassemblies of the barometer will follow the reverse

NOTE

order of disassembly shown in figures 4-3 through 4-8.

A new (previously unused) chamois

Individual operations that require particular care are

skin should be washed several times

presented below.

in detergent to remove tanning oils

and rinsed thoroughly in clear water.

a. Platform Assembly. If either level has been

removed, chip out all the old plaster from the level well

i. Blow off excess water droplets with clean

in the platform and set the new level temporarily in

compressed air or rinse in high-grade acetone, if

blocks of oily clay. Adjust the replaced bubble level

available.

against a master indicator and when a level indication is

j. Using a brush and cleaning compound, clean

obtained, set the level permanently in plaster of paris.

glass cistern in the same manner as described for metal

b. Cistern and Base Assembly (Fig. 4-12). Install

parts.

a new tube cushion O-ring packing and large O-ring

k. Using cleaning rod 7913102andapiece of

hydraulic packing. Press the O-ring press washer into

cheesecloth FSN 8305-205-3496 or clean rag, scrub the

the gland nut well in the barometer base. Apply a small

barometer tube thoroughly.

quantity of sealant grease (Fisher Scientific Company,

l. Rinse glass parts thoroughly with hot water and

Part Number 14-637 or equal) to the lower two or three

finally with distilled water. Blow clean, dry air through

threads of the gland nut, being careful not to

tube until dry.

contaminate the other items. Screw the gland nut into

m. Reassemble the barometer in accordance with

the barometer base, but do not tighten until the

paragraph 4-14.

barometer tube is installed.

n. Wipe the scale and thermometer rods with a

soft cloth containing a few drops of instrument oil MIL-L-

Figure 4-12. Installation of gland nut.

4-29