OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER

221
(i) Loose or broken operating line.
Leaks in pressure lines are not likely
to occur except in piping and may therefore
be easily located by inspection of
external lines and those inside of A-end
tank.
(j) Scored valve plate in main pump or hydraulic
motor.
Inspect and check for foreign matter in
system.
(k) Broken or distorted auxiliary pump shaft.
Inspect auxiliary pump.
( Z) Excessive internal leakage in auxiliary pump.
Pump head too loose. Screws should be
tightened. Precautions should be taken
not to clamp head too tightly as rotor
must rotate freely when moved by hand.
Check Lnt.er naL parts' for scoring by foreign
matter.
39. Failure to rotate. - If pressure is available in
the system and the projectile ring will not operate it will
probably be due to one of the following causes.
(a) Insufficient pressure in operating lines.
Lock output shaft and check setting of
main pump relief valves for 2200 Lbs . per
sq. ~n. pressure.
(b) Insufficient clearance between deceleration
cams and link rollers.
There must be approximately 3/64 H clearance
between rollers and cams when unit
is in latched position. This is to permit
suffic ient offset of pump yoke to
overcome internal leakage and to start
rotation.
(C) Excessive internal leakage in main pumpor hydraulic
motor.
Manually drive proj ectile ring to midposi
tion. Then turn power on and shift