Manitowoc 2250 Service And Maintenance Manual

Reference Only
Manitowoc Published 11-06-15, Control # 040-13 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 inlet fitting,
hose, or tube with oil. If there is an air leak, the oil
will cause a noticeable reduction in noise. Correct
cause for any air leak, or pump/motor will be ruined.
• 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)
Do not return leakage oil back to hydraulic tank.
6. Look for signs of overheating: heat peeled parts, burned
and scorched oil odor, and darkening and thickening of
oil. Maximum temperature of oil in tank must not exceed
180°F (82°C).
7. Have hydraulic oil analyzed at regular intervals to
determine condition of oil and extent of system
contamination.
By having the oil analyzed on a regular basis, an oil
change interval meeting 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 Pumps
It is not necessary to drain the hydraulic tank when servicing
the hydraulic pumps. To service the pumps, close the shut-
off valve (Figure 2-1
) in the pump suction line.
Open the valve prior to starting the engine after servicing the
pumps. The valve can be locked open with a padlock.
Cleaning Fill Cap Assembly
See Figure 2-2 for the following procedure.
1. Clean fill cap weekly to assure that ventilating ports in fill
cap remain open.
a. Clean area around fill cap assembly.
b. Remove fill cap from flange.
c. Thoroughly clean fill cap with clean, nonflammable
solvent. Blow dry with compressed air.
d. Reattach fill cap to flange.
2. Clean entire fill cap assembly whenever hydraulic oil is
changed.
a. Clean area around fill cap assembly.
b. Disassemble fill cap assembly.
CAUTION
Avoid Damage to Pumps!
Open hydraulic tank shut-off valve (Figure 2-1) before
starting the engine. Failing to perform this step will result
in damage to pumps from cavitation.
FIGURE 2-1
P779
Hydraulic Tank
Shut-Off Valve
To Hydraulic
Tank
Handle OPEN
(pull towards 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