TM 5-2350-262-20-3
APRON CYLINDERS OPERATION CHECK
CAUTION
Ensure apron cylinders are blocked prior to retracting disconnected
cylinder rod ends. Cylinders will drop and damage hydraulic
hoses.
Stop engine; relieve hydraulic pressure. Remove all test equipment and connect hoses.
With apron (1) lowered, remove exterior armor plates 1L and 1R. Remove bolt (2), nut (3),
two washers (4), and clevis pin (5) from rod end (6) of both apron cylinders (7). Block
apron cylinders (7).
Start engine and hold APRON CONTROL lever in UP position. Observe movement of
apron cylinders (7).
APRON CYLINDERS OIL FLOW TEST
NOTE
Have suitable container ready to catch oil.
Extend apron cylinders (7) fully. Stop engine. Relieve hydraulic pressure by moving
APRON CONTROL lever UP and DOWN several times, and disconnect left and right
APRON CYL-19 hoses (8) from apron cylinders (7). Hold open end of each hose (8) in a
bucket.
NOTE
If there is no flow from one of the APRON CYL-19 hoses, the
blockage is between the cylinder end of that hose and circuit
19 tee on the hull floor. If no flow from either hose is
observed, the blockage is in CONT VLV-19 hose between
circuit 19 control valve and tee on hull floor.
Have assistant start engine and slowly move APRON CONTROL lever to UP
position. Observe oil flow from both APRON CYL-19 hoses. Stop engine; relieve
hydraulic pressure. Reconnect left and right APRON CYL-19 hoses (8) to cylinders
(7).
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