Manitowoc 2250 Service Maintenance Manual

Reference Only
Manitowoc Published 07-19-16, Control # 249-01 2-5
2250 SERVICE/MAINTENANCE MANUAL HYDRAULIC AND AIR SYSTEMS
2
Changing the Oil
Drain and refill the hydraulic system every 1,000 hours or
semiannually, whichever comes first, unless an alternate
interval has been established through an oil analysis
program.
See Figure 2-3
for the following procedure.
1. Operate the crane until the hydraulic oil is at its normal
operating temperature. This will help prevent impurities
from settling in the system.
2. Stop the engine.
3. Open the drain valve (3) on the hydraulic tank to
completely drain the tank.
4. Disconnect the air piping at the connections to fully
access the clean-out cover (2).
5. Clean all dirt off the clean-out cover.
6. Remove the cover from the tank and proceed as follows.
a. Clean out any sediment inside the tank.
b. Remove the diffusers (1) from inside the tank.
Soak the diffusers in diesel fuel and blow them
clean and dry with compressed air. Replace any
damaged parts.
c. Reinstall the diffusers after cleaning.
7. Use new seals and fasten the clean-out covers to the
tank.
8. Replace the suction filter elements.
9. Clean the fill cap assembly.
10. Fill the hydraulic tank to the specified level with the
proper hydraulic oil (see Lubrication
Section 9). When
adding oil to the tank, filter the oil through a 10-micron
filter.
11. Start and run the engine at low speed for 10 to 15
minutes to fill all the lines with oil and to bleed any air
from the system.
12. Stop the engine and fill the hydraulic tank to the
specified level.
NOTE: If the hydraulic system is extremely dirty (gum or
lacquer formation on parts indicated by erratic,
jerky, or sluggish operation), change the oil again
after 48 hours of operation.
CAUTION
Air System Contamination!
Dust, dirt, and other debris can contaminate and damage
the air intake system.
Clean the outside of the air piping to prevent contaminates
from entering the air intake system when the air piping
connection is opened to access the hydraulic tank clean-
out covers.
Hydraulic Oil Contamination!
Dust, dirt, and other debris can contaminate and damage
the hydraulic system.
Take precautions to prevent contaminates from entering
the tank while the covers are off.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English