Manitowoc Published 11-06-15, Control # 040-13 2-17
2250 SERVICE/MAINTENANCE MANUAL HYDRAULIC AND AIR SYSTEMS
Initial Oil Fill
NOTE: Use proper viscosity new hydraulic oil filtered
through at least a 10-micron filter.
1. Fill each motor case with clean oil to level of case drain
port (Figure 2-18
).
2. Fill pump cases as follows:
a. Remove pipe plug from case drain pipe
(Figure 2-19
).
b. Slowly fill pipe with clean oil. Air will gurgle out of
pipe as oil is added.
c. Stop filling pipe when oil stops gurgling and pipe is
full.
d. Securely install pipe plug.
3. Fill hydraulic tank with clean oil to middle of FULL level
sight gauge (Figure 2-20
).
Pressure Sender Calibration
Perform this procedure before Initial Start-Up.
1. Turn on cab power switch.
2. Turn crane mode selector key counterclockwise to
confirm position and hold.
3. Press engine run/stop switch to run position.
4. Continue to hold crane mode selector key in confirm
position for one minute after performing 3
.
5. Confirm for proper calibration — with engine off (key in
run), charge pressure on diagnostic screen for each
crane function should be 50 psi (3,4 bar) or less.
FIGURE 2-19
Access at Left Rear Side of Rotating Bed
(to rear of pumps)
Pipe
Plug
P969
Case Drain
Return Pipe
FIGURE 2-20
Hydraulic
Tank
P600
P593
Fill Cap
Access at Right Outboard Side of Rotating Bed
(next to boom hoist)
HIGH Level
Sight Gauge
LOW Level
Sight Gauge
Inboard Side of Tank
FIGURE 2-21
To Hydraulic Tank
P779
Handle OPEN
(pull toward you to close)
Install Bolt and Nut or Padlock To
LOCK handle Open
To P u mp s
Access at Rear Inboard Side of Rotating Bed
(above fuel tank)
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