Adjusting Ram Position - Greenlee 881-MBT Manual De Instrucciones

Adjusting Ram Position

Setup
1. The ram positioner is used to adjust the position
of the ram. Refer to the markings stamped on the
connecting bars for the proper ram positions for
each size of conduit.
2. Rotate the yoke 90° from its normal position and
place the ram positioner between the connecting
bars as shown in Fig. 5. Mounting tabs of ram
positioner should be up as shown in Fig. 6.
3. Apply pressure to gradually extend the ram until the
holes of the ram positioner line up with the holes of
the yoke. Then attach the ram positioner to the yoke
with the yoke pin as shown in Fig. 7.
Figure 7
Greenlee Tools, Inc.
Figure 5
Cylinder
Head Pin
Pump
Control
Yoke
Pin
Figure 8
881-MBT Mobile Bending Table
Changing Ram Positions
1. Remove the hitch pins from each of the cylinder
head pins and then remove each pin as shown in
Fig. 8. You may need to apply or release pressure
on the ram in order to free the pins from the cylinder
block.
2. Use the pump to extend the ram if you wish to raise
the cylinder block—or release the pressure to lower
the block—to align it with proper set of holes in
the connecting bars for the size of conduit you are
bending. Again you may need to apply or release
pressure in short bursts in order to properly align
the holes before you can re-insert the cylinder head
pins as shown in Fig. 9.
Note: Be very careful that you do not elevate the
ram unit above the top of the connecting bars when
positioning for 4" conduit.
Ram
Positioner
Figure 6
6
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Figure 9