Manitowoc 2250 Service Maintenance Manual

Reference Only
HYDRAULIC AND AIR SYSTEMS 2250 SERVICE/MAINTENANCE MANUAL
2-2
Published 07-19-16, Control # 249-01
Hydraulic hose assemblies operating in Zone D and Zone E
(cold climates) should expect a degradation of mechanical
properties. Long-term exposure to these cold temperatures
will negatively impact service life. It is recommended these
hoses be inspected as indicated in step 1
.
HYDRAULIC SYSTEM MAINTENANCE
Safety
Lower or securely block hydraulically operated attachments
and loads before servicing. Do not rely on the controls to
support the attachments or loads.
Stop the engine and relieve the hydraulic pressure to zero
before servicing or disconnecting any part of the hydraulic
system. After stopping the engine, operate the controls in
both directions to relieve the pressure.
Before servicing the hydraulic system, attach a warning sign
to the engine start controls to warn other personnel not to
start the engine.
Do not perform hydraulic system maintenance, adjustment,
or repair procedures unless authorized to do so. Make sure
all applicable instructions have been read and are thoroughly
understood.
Do not alter the specified pressure settings. Higher than
specified pressures can cause structural or hydraulic failure.
Lower than specified pressures can cause a loss of control.
Never check for hydraulic leaks with your hands. Oil under
pressure can penetrate the skin, causing serious injury. Oil
escaping from a small hole can be nearly invisible. Check for
leaks only with a piece of cardboard or wood.
Storing and Handling Oil
Adhere to the following when storing and handling oil:
• Store oil drums in a clean, cool, dry location. Avoid
outdoor storage.
• Store oil drums on their side and cover them to prevent
water and dirt from collecting on them.
• When handling drums and transfer containers, use care
to avoid damage that can cause leaks and entry of dirt or
water into the oil.
• Before opening a drum, carefully clean the top of it. Also,
clean the faucet or pump that will remove oil from the
drum.
• Only use clean transfer containers.
• Do not take any oil from storage until the oil is needed. If
the oil cannot be used immediately, keep the transfer
container tightly covered.
Storing and Handling Parts
Adhere to the following when storing and handling parts:
• Store new parts (valves, pumps, motors, hoses, tubes)
in a clean, dry, indoor location.
• Do not unpack parts or remove port plugs until the parts
are needed.
• Once unpacked, carefully inspect each part for damage
that may have occurred during shipping. Remove all
shipping material from the ports of the parts before
installing.
• Fittings, hoses, and tubes that are not equipped with
shipping caps or plugs must be carefully cleaned before
they are used. Flush these parts with clean hydraulic oil.
Then seal all openings until use at assembly.
Do not use rags to plug openings. Use clean plastic
shipping plugs and caps.
Inspecting the System
The damaging effects of dirt, heat, air, and water in the
hydraulic system can only be prevented by regular, thorough
inspection of the system. Inspection frequency depends on
operating conditions and experience with the system. The
more often the system is inspected and deficiencies are
corrected, the less likely it is that the system will malfunction.
A good inspection program includes the following checks:
• Keep accurate records so future maintenance needs
can be projected.
• Only use approved hydraulic oil in the system. See
Lubrication
Section 9 for more information.
• Check the oil level in the tank daily. Carefully clean the
area around the fill cap before removing it to add oil.
When adding oil to the tank, filter the oil through a 10-
micron filter.
• Clean the exterior of the system often. Do not let dirt
accumulate on or around any part of the system.
• Check for external leaks. Leaks are not only unsafe, but
they also attract dirt, and in some cases, allow air and
water to enter the system. Do not return leakage oil back
to the hydraulic tank.
• Look for oil leaking from fittings and from between parts
that are bolted together. Tighten loose fittings and
attaching bolts to the proper torque, and do not
overtighten.
If leaks continue, replace necessary seals or gaskets.
• Look for oil leaking from pump and motor shaft ends,
from valve spool ends, and from cylinder shaft ends.
Replace the necessary seals if leakage is found at any
of these points.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English