Manitowoc 2250 Service And Maintenance Manual

Reference Only
Manitowoc Published 11-06-15, Control # 040-13 2-35
2250 SERVICE/MAINTENANCE MANUAL HYDRAULIC AND AIR SYSTEMS
2
Maintenance
See Figure 2-37 for the following procedure.
Once every 1,000 hours or 6 months (whichever comes first)
clean the strainer plates and filter in the top of the air dryer as
follows.
NOTE: It may be necessary to shorten interval due either
to extremely dirty operating conditions or to an old
air compressor that is leaking oil into the system.
Low pressure in air system is an indication that
strainer plates and filter are plugged with dirt or oil.
1. Disconnect air lines and electric wires from air dryer.
2. Remove bolts connecting air dryer mounting bracket to
rotating bed and remove air dryer from crane.
3. Remove bolts from head of air dryer to expose strainer
plates and filter.
NOTE: A slight spring force will be felt when disassembling
head from air dryer body.
4. Remove and clean strainer plates and filter with solvent
and blow dry.
5. Reassemble and install air dryer in reverse order.
FIGURE 2-36
System Pressure
Out
IN
Pilot Pressure
Cut-In Pressure - 120 psi
(8,3 bar)
Cut-Out Pressure -132 psi
(9,1 bar)
A553
Air Piping Diagram
Item Description
1 Compressor
2 Safety Valve
3 Compressor Unloader
Valve
4To Air Valve
5 De-icer
6 Air Filter
7Air Tanks
8 Moisture Ejector
9 Check Valve
10 Air Dryer
11 Air Dryer Unloader Valve
1
2
3
4
5
6
7
8
9
10
11
WARNING
Avoid Injury!
Stop engine and vent air from system before performing
maintenance.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English