HYDRAULIC SYSTEM 16000 SERVICE/MAINTENANCE MANUAL
2-32
Published 05-03-17, Control # 228-03
Pressure Sender Replacement
See Figure 2-30 for identification of pressure senders:
1. Lower all loads to the ground.
2. Move all control handles to off and park all crane
functions.
3. Stop the engine.
4. Place a suitable container under the pressure senders to
catch oil leakage.
Perform steps 5 to 9 only at faulty pressure senders.
5. Disconnect the electrical plug from the pressure
senders.
6. Slowly loosen the pressure senders only enough to
allow any remaining pressure to exhaust.
7. Remove the pressure senders.
8. Install the new pressure senders and connect electrical
cords.
Pressure senders have pipe threads. Be sure to install
thread sealant.
9. Bleed the pressure senders:
a. Connect the bleed lines equipped with shut-off
valves to the couplers on the pressure sender
manifold. Open the shut-off valves. Use a suitable
container to catch the oil flow.
b. With all the control handles off, start and run the
engine at low idle (850 to 950 RPM).
c. Observe oil flowing from the bleed lines.
d. Close the shut-off valves when clear oil flows from
the bleed lines (no air bubbles in oil).
e. Stop the engine.
f. Remove the bleed lines from the couplers at the
pressure senders.
10. Test the pressure senders (see the procedure in this
section).
WARNING
High Pressure Oil Hazard!
Do not attempt to remove a pressure sender unless the
following steps are performed. High pressure oil will bleed
from the pressure sender ports.
P2296
D1
LT LT RT SW D2 ACC
D4
SW
D4
RT
B
B
A
BA BAB AB
D1 LT LT RT SW D2D4 SW
D4
RT
Pressure Senders
On Left Side of Rotating Bed
Item Function Direction Pump - Port
D1 B Drum 1 Hoist Pump 4 - B
D2 B Drum 2 Hoist Pump 6 - B
D4 A
Drum 4 or
Drum 5
Up Pump 3 - A
D4 B Down Pump 3 - B
LT A
Left Crawler
Reverse Pump 2 - A
LT B Forward Pump 2 - B
RT A
Right Crawler
Forward Pump 1 - A
RT B Reverse Pump 1 - B
SW A
Swing
Right Pump 5 - A
SW B Left Pump 5 - B
ACC Accessory
System
NA NA
FIGURE 2-30
Gauge Ports
ACC
B
B
ABABABA B
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