Manitowoc MLC650, Service Maintenance Manual

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Reference
Only
HYDRAULIC SYSTEM MLC650 SERVICE/MAINTENANCE MANUAL
2-28
Published 09-09-16, Control # 229-09
2. Open the vent ports and remove the vent plugs from the
suction manifold (
Figure 2-27 ).
3. Open the hydraulic tank shut-off valve (1b)
(
Figure 2-24 ).
4. Make sure the hydraulic tank quick drain valve is closed
(
Figure 2-25 ).
5. At the engine, disengage the engine clutch
(
Figure 2-26 ).
See Figure 2-25 for the remaining steps.
6. Open the air vent valve on top of the tank to release
pressure when filling through the manual fill port or
power fill coupling.
7. Fill the tank manually through the manual fill port or by
pumping oil through the power-fill coupling with an
owner-supplied portable pump. Use new hydraulic oil
filtered through a 10-micron filter.
8. Do not fill the tank through breather ports or the top of
the return filter. The hydraulic system could be
contaminated from unfiltered oil.
9. Securely install vent plugs and vent caps as soon as
clear oil appears at each vent opening.
10. Fill to the Cold Full level on the hydraulic tank gauge.
11. If required, apply 0,20 to 0,34 bar (3 to 5 psi) owner-
supplied air pressure to the air valve or coupler on the
hydraulic tank.
The tank breather allows 0,21 bar (3 psi) pressure to
remain in the tank to force oil into the charge system.
12. Observe bleed ports as the charge system fills. Securely
install vent caps when clear oil starts flowing from the
bleed ports in the charge pressure suction manifold.
NOTE: It is extremely important to perform the bleed
procedure described above in the field any time the
system is drained completely.
13. Fill the pump cases at the return line cap in the return
line until the manifold will not take any more oil.
Use new hydraulic oil filtered through a 10-micron filter.
14. Install and securely tighten the return line cap as soon
as clear oil appears.
15. Check for hydraulic leaks and correct if found.
CAUTION
Avoid Engine Clutch Damage!
Observe the following precautions for the engine clutch:
• Decrease engine speed to idle before engaging or
disengaging clutch.
• Do not run engine longer than 20 minutes with clutch
disengaged.
Item Description
1 Engage
2 Disengage
Through Access Cover
on Top of Engine
FIGURE 2-26