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 TM 55-1905-221-14-3
6-22.
POWER UNIT - MULTIPLE ENGINE REMOVAL - AND RUN-IN INSTRUCTIONS
(Continued).
LOCATION/ITEM
ACTION
REMARKS
OVERHAUL (Cont)
(e) Adaptor for connecting pressure gage or water manometer to crankcase.
(f) Adaptor for connecting pressure gage or mercury manometer to exhaust manifold at flange.
(g) Adaptor for connecting vacuum gage or water manometer to blower inlet.
(h) Adaptor for connecting fuel pressure gage to fuel inlet manifold or fuel pump lines.
In some cases, gages reading in pounds per square inch are used for determining pressures while standard
characteristics are given in inches of mercury or inches of water. It is extremely important that the scale of such a gage
be of low range and finely divided if accuracy is desired. This is especially true of a gage reading in psi, the reading of
which is to be converted to inches of water. The following conversion factors will be helpful:
Inches of water = psi x 27.7
Inches of mercury = psi x 2.04
6-280
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