Broderson IC-200-2J, Руководство по эксплуатации и обслуживанию, Страница: 66 / 79

3-20
REMOVAL OF AIR FROM HYDRAULIC CIRCUITS
To remove air from hydraulic circuits, perform the following steps:
1. Ensure all main shutoff valves on the reservoir are open.
2. Start the engine.
3. Raise and lower the boom minimum five times. Ensure that the cylinder travels full
stroke.
4. With the boom retracted and elevated to at least 65°, raise and lower the hook at least
once.
5. Extend and retract the boom minimum five times.
6. Swing the turret left one full revolution. Swing the turret right one full revolution.
7. Extend and retract each outrigger minimum five times. Outriggers can be operated in
pairs.
8. With the crane on outriggers, steer the crane wheels fully left and right three times in
each steering mode.
9. BMC uses multiple types of RCL computer. If the RCL computer is connected to the
topping cylinder by hose, it may be necessary to bleed this hose. Perform the follow-
ing:
a. Raise the boom to approximately 5°.
b. Turn off engine.
W A R N I N G
The boom will lower during this procedure. Failure to keep the boom free
of obstructions could lead to destruction of property, injury, or death.
c. The boom
will
lower during this procedure. Ensure no personnel are in poten-
tial pinch points, especially around the topping cylinder and between turret side
plates. Ensure that the boom is free of obstructions. Ensure that the hook will
not hit the ground and foul the hoist line.
d. Find the small hose that connects to the piston side of the cylinder, and follow it
back to the RCL computer. Find the hose that connects to the rod side of the
cylinder, and follow it back to the computer.
e. Loosen the piston-side fitting at the computer until the boom begins to lower.
Allow the boom to lower 1-2 degrees, or until no more air appears to be leaking
out. Then re-tighten the fitting. Use a bucket or other means to catch as much
oil as possible. If little or no air is present in the line, the boom may not visibly
lower before the line is purged.
f. Loosen the rod-side fitting at the computer. The boom should not move.
g. Start the engine.
h. SLOWLY lower the boom until no more air is leaking out of the rod-side fitting.
Oil may come out of the fitting before the boom begins to move. Use a bucket
or other means to catch as much oil as possible.
i. Re-tighten the rod-side fitting.
j. Turn off the engine.
10. Check the level of oil in the hydraulic reservoir and add more if necessary.
11. Set the crane on outriggers. With the boom about halfway extended and about 45° el-
evated, lift a load near maximum capacity using the hoist. Raise the boom an addi-
tional 10-15°. Extend the boom. Check for “spongy” operation.
12. If necessary, cycle functions again to remove remaining air.