Manitowoc 2250 Service Maintenance Manual

Reference Only
UNDERCARRIAGE 2250 SERVICE/MAINTENANCE MANUAL
8-4
Published 07-19-16, Control # 249-01
HYDRAULIC HAND PUMP
Manitowoc provides a hand pump and cylinder to be used for
performing the crawler adjustment procedure only. Any other
use of this tool is neither intended nor approved.
Assembly
See Figure 8-4 for the following procedure.
1. Apply 1-1/2 wraps of a high-grade thread sealant on the
hose fitting threads.
Do not apply sealant to the first complete thread to
ensure that the tape does not enter into the hydraulic
system, which could cause a malfunction or damage.
2. Connect the hose from the pump outlet port to the
cylinder inlet port.
3. Do not overtighten the connections. The connections
only need to be snug and leak free. Overtightening can
cause premature thread failure and may cause the
fittings or the castings to split at pressures lower than
their rated capacity.
Maintenance
See Figure 8-4 for the following procedure.
1. Keep the unit clean and store it in a safe place where it
cannot be damaged.
2. Keep the oil in the pump at the proper level. Check the
oil level by opening the valve and fully retracting the
cylinder rod to return all oil to the pump. The cylinder rod
must be fully retracted or the reservoir will contain too
much oil.
For the Simplex pump, proceed as follows.
a. Place the pump in a horizontal position on a flat
surface.
b. Using a screwdriver, remove the air release screw.
c. Add hydraulic oil until the reservoir is 2/3 full. Do not
overfill the pump.
d. Securely reinstall the air release screw.
For the Enerpac pump, proceed as follows.
a. Place the pump in a vertical position with the hose
end down.
b. Using a screwdriver, remove the filler plug.
c. Add hydraulic oil until it is at the oil level mark on the
dipstick. Do not overfill the pump.
d. Securely reinstall the filler plug.
3. Test the operation of the system. Erratic operation
indicates that there is air in the system. Recheck the oil
level after removing the air (see Removing Air from the
Cylinder).
Removing Air from the Cylinder
See Figure 8-4 for the following procedure.
1. Close the valve finger tight only.
2. Position the pump higher than the cylinder and position
the cylinder so the cylinder rod is pointing down.
3. Operate the pump to fully extend the cylinder rod.
4. Open the valve and retract the cylinder rod to force oil
and trapped air back into the pump.
5. Repeat the steps until the cylinder operates smoothly.
Erratic operation indicates that there is air in system.
WARNING
Personal Injury Hazard!
Serious personal injury may occur due to contact with
hydraulic oil that is under pressure. The following may
occur:
• Because the pump is not vented, the pump, cylinder,
or hose can explode if the maximum pressure rating
is exceeded.
• The pump handle can kick back.
• Handle extensions can cause unstable operation.
To avoid injury, observe the following:
• Wear safety glasses and other personal protective
gear when operating the hand pump.
• Do not exceed the maximum pressure rating of
700 bar (10,000 psi).
• Do not set the pump relief valve higher than 700 bar
(10,000 psi).
• Do not attempt to return more oil to the pump than it is
capable of holding.
• Do not overfill the pump.
• Always keep your body to the side of the pump, away
from a direct line of handle force.
• Do not add any extensions to the handle.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English