National Crane 03-20-2019 Control # 613-06 7-7
NBT30H-2 SERVICE MANUAL OUTRIGGERS
Extension Cylinder
The purpose of the extension cylinder is to extend and
retract the outrigger beam.
Removal
1. Remove the cylinder rod pin (2, Figure 7-9).
2. Remove the bolts (3) from the cylinder wear pads (4).
3. Remove the extension cylinder from the outrigger beam.
Installation
1. Slide the extension cylinder into the outrigger beam.
2. Install the extension cylinder wear pads.
3. Install the cylinder rod pin.
RSOD Stabilizers
The RSOD stabilizers extend down to provide stability for
crane operation. The stabilizer cylinder is enclosed in the
stabilizer support tube (4) and can be removed for
replacement or repair.
Removal
1. With a jack, raise the truck until there is enough
clearance to remove the stabilizer cylinder (3) and
foot (4) from the stabilizer support tube (7).
2. Tag and disconnect the stabilizer cylinder hydraulic
hoses (6).
3. Remove the check valve (2) from the stabilizer cylinder.
4. Remove the bolts on top of the stabilizer support tube
and lower the stabilizer cylinder and foot out of the
support tube.
5. Remove the bolt on the bottom of the stabilizer foot and
remove the stabilizer cylinder from the foot.
Installation
1. Place the stabilizer cylinder in the stabilizer foot and bolt
the bottom of the foot to the cylinder.
2. Apply grease (EP-MPG) to the outside of the stabilizer
foot.
3. Place the stabilizer foot under the stabilizer support tube
and jack up the foot until the stabilizer cylinder can be
bolted to the top of the stabilizer support tube.
4. Bolt the stabilizer cylinder to the stabilizer support tube.
5. Reinstall the check valve.
6. Reconnect the hydraulic hoses as per removal tags.
FIGURE 7-9
Item Component
1
Extension Cylinder Anchor Bolts
2
Cylinder Rod Pin
3
Wear Pad Bolts
4
Wear Pad
5
Extension Cylinder Hydraulic Hoses
6
Outrigger Beam
7
Stabilizer Cylinder Hydraulic Hoses
5
1
2
4
3
2
4
6
7
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