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 TM 55-1905-220-14-10
5-21. HYDROSTARTER - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
TESTING
4.
NOTE
The following tests must be performed on a main populsion
engine prior to completion of assembly.
a. Mount hydrotor in a suitable fixture and connect
all hoses to appropriate fittings as illustrated.
b. Open external control valve, start engine pump
to circulate oil through complete system with
control valve remaining open, thus purging
system of air. Examine hydrotor and all fit-
tings for possible leaks before releasing
control valve.
c. Allow system pressure to build up to 3000 psi
(20685 kPa), at which pressure the unloading
valve by-passes oil to the reservoir. Again
examine for leaks in system. Should pressure
fail to rise rapidly to accumulator precharge
pressure and then build up gradually to 3000 psi
(20685 kPa), it indicates system was not purged
completely. Purge again if necessary.
NOTE
If at anytime, leaks occur externally, the unit must be
disassembled to correct leakage before proceeding with test.
5-390
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