Manitowoc 2250 Service Maintenance Manual

Reference Only
Manitowoc Published 07-19-16, Control # 249-01 2-3
2250 SERVICE/MAINTENANCE MANUAL HYDRAULIC AND AIR SYSTEMS
2
• Replace tubes that are cracked, kinked, or bent.
• Replace hoses that are cracked, split, or abraded.
• Listen to pumps and motors for unusual noises. A high-
pitched whine or scream can indicate that air is being
drawn in.
An air leak can be pinpointed by flooding the inlet fitting,
hose, or tube with oil. If there is an air leak, the oil will
cause a noticeable reduction in noise. Correct the cause
of any air leak, or the pump/motor will be damaged.
A high-pitched whine or scream from the pump can also
indicate cavitation (pump being starved of oil). This
condition is caused by the following problems:
• Plugged suction filter
• Collapsed or plugged suction line
• Wrong oil (viscosity too high)
NOTE: Do not return leakage oil back to the hydraulic tank.
• Inspect for signs of overheating, such as heat-peeled
parts, a burned or scorched oil odor, and darkening and
thickening of oil. The maximum temperature of the oil in
the tank must not exceed 82°C (180°F).
• Have the hydraulic oil analyzed at regular intervals to
determine the condition of oil and the extent of system
contamination.
By having the oil analyzed on a regular basis, an oil
change interval that meets your operating conditions
can be established.
NOTE: Contact your oil supplier for the availability of oil
analysis services and the steps that should be
taken to obtain these services.
Servicing the Pumps
See Figure 2-1 for the following.
It is not necessary to drain the hydraulic tank when servicing
the hydraulic pumps. To service the pumps, close the
hydraulic tank shut-off valve in the pump suction line.
After servicing the pumps, open the valve prior to starting the
engine. The valve can be locked open with a padlock.
Cleaning the Fill Cap Assembly
See Figure 2-2 for the following procedure.
1. Clean the fill cap weekly to ensure that the ventilating
ports in the fill cap remain open.
a. Clean the area around the fill cap.
b. Remove the fill cap from the flange.
c. Thoroughly clean the fill cap with a clean,
nonflammable solvent. Blow dry the fill cap with
compressed air.
d. Reattach the fill cap to the flange.
2. Clean the entire fill cap assembly whenever the
hydraulic oil is changed.
a. Clean the area around the fill cap.
b. Disassemble the fill cap.
CAUTION
Hydraulic Pump Damage!
Running the hydraulic pumps without an adequate oil
supply will result in damage to the pumps from cavitation.
Open the hydraulic tank shut-off valve before starting the
engine.
FIGURE 2-1
P779
Hydraulic Tank
Shut-Off Valve
To Hydraulic
Tank
Handle Open
(pull toward you to close)
To
Pumps
Install Bolt and Nut or Padlock
to Lock Handle Open
FIGURE 2-2
S100
Fill Cap
Screen
Flange
Gaskets

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English