MECHANISM


PISTON RODS(RECOIL AND COUNTERRECOIL)-Dfrty, dusty;
oil leaks around the stuffing box at rear of cylinder; piston r
rod end nuts loose, damaged; cotter pins missing, worn.
 n r


~43~IIIIIII II 1J~2A:;~Z2f


ACCUMULATOR-Nitrogen pressure low; pressure
control valve on the bum.
 (If the electric pump runs steadily during firing opera-
tions or comes on every time somebody touches a
hydraulic control, i means either the nitrogen pressure
in the accumulator is low or the pressure control valve
mounted beneath the deck is defective. You mechanics
can replace the control switch, but if the nitrogen pres-
sure's low, support'll have to take over.)











 RESERVOIR-Oil level low; bayonet gage missing,
 broken; filters dirty, need replacing; reservoir
 breather cap dirty, broken, screws damaged. /
 (There're two filters to check on the main hydrauli
 system one on the deck, the other in the turret well
 Be sure you check both.)


a


j RETRACTION SYSTEM-Valve won't work
 when handle's moved; won't hold cannon in
 traveling or tiring position: leaks around
 valve and connections; hydraulic lines bent,
 loose; retraction handle bent, knob busted.
 (Never operate the retracting control handle un-
 less the travel lock's engaged in the traveling
 position.)


OIL INDEX (RECUPERATOR)-Oil level too low;
excessive oil leaks around head cylinder; index
won't move; cannon won't return to battery.
 (Any time the oil index sticks out less than 0 20 in,
that's about 3/16ths, you have to reestablish the oil
reserve in the recuperator cylinder. You'll find the scoop
an this in para 80b of Change 4 (31 Mar 65) to your
-10 TM. Never fire the weapon when the oil index is
withdrawn into the recuperator cylinder head, since no
reserve oil is present.
 And keep on eye peeled for leaks. Up to three drops
in five minutes ore allowable But if it leaks any faster
than that, get word to support.)



 /MMORE


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