Manitowoc National Crane NBT30H-2, Руководство по обслуживанию

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7
National Crane
03-20-2019 Control # 613-06
7-5
NBT30H-2 SERVICE MANUAL OUTRIGGERS
Installation
1. Reconnect the hydraulic hoses for the jack cylinder to
the base of the extension cylinder per removal tags.
2. Secure the jack hydraulic hoses to the extend cylinder
with the clamps as shown in Figure 7-5.
3. Slide the extension cylinder into the outrigger beam.
Make sure the jack hydraulic hoses are routed as shown
in Figure 7-5.
4. Insert the rod end of the extension cylinder into the
keyhole to secure the end of the rod.
5. Reinstall the keeper in the keyhole.
6. Reinstall the outrigger beam as described in Outrigger
Beam Removal on page 7-1.
Jack Cylinder
The outrigger jack cylinders extend down to provide stability
for crane operation. The cylinder barrel extends down out of
the jack support tube. This protects the cylinder rod and
reduces problems caused by dirt and mud.
Removal
1. With a lifting device, raise the truck until there is enough
clearance to remove the jack cylinder (8, Figure 7-5)
from the jack support tube (7).
2. Extend the outrigger beam until the access hole on top
of the outrigger beam is accessible.
3. Tag and disconnect the hydraulic hoses to the jack
cylinder.
4. Unbolt the retaining bolts (6) for the jack cylinder.
5. Slide the jack cylinder (8) out of the jack support tube
(7).
Installation
1. Apply grease (EP-MPG) to the ID of the jack support
tube.
2. Place the jack cylinder under the jack support tube and
insert the jack cylinder into the support tube.
3. Bolt the jack cylinder in the top of the support tube with
the retaining bolts.
4. Reconnect the hydraulic hoses as per removal tags.
Wear Pad Adjustment
There are seven adjustable wear pads on each outrigger.
Three wear pads are on the outrigger box and can be
accessed from the outside. Four wear pads are on the
outrigger beam and are adjusted from inside the outrigger
box.
Outrigger Beam Wear Pad Adjustment
Wear pad adjustment is as follows:
1. Remove the end plate from the outrigger box. This
should provide access to the wear pads (Figure 7-7).
2. Remove the wear pad set screw from the adjustable
wear pad (Figure 7-6).
3. Apply anti-seize to wear pad and set screw threads.
4. Reinstall the wear pad set screw to keep the wear pad in
place.
5. Screw the wear pad in until it stops and back off 1/2 turn
to maintain 3.3 mm (.13 inch) gap in retracted position.
NOTE: Each 1/2 turn moves the wear pad about 3.3 mm
(1/8 inch) laterally.
6. Repeat for all wear pads on the outrigger beam.
Outrigger Box Wear Pad Adjustment
1. With the outrigger fully retracted, attach the float to the
jack and extend the jack until the outrigger beam
contacts the top of the outrigger box.
2. Apply anti-seize to wear pad and set screw threads.
3. Screw the bottom wear pads on the outrigger box
(Figure 7-1) in and back off about 1/2 turn to maintain
3.3 mm (.13 inch) gap.
NOTE: Each 1/2 turn moves the wear pad about 3.3 mm
(1/8 inch) laterally.
4. Screw the side wear pads on the outrigger box
(Figure 7-1) in and back off about 1/2 turn.
Nonadjustable Wear Pad
Check the nonadjustable side wear pad on the outrigger box
(Figure 7-3). There should be a 1.5 mm (0.06 in) gap
between the outrigger box and wear pad. To correct the gap,
add or remove shims to the wear pad.
FIGURE 7-6
Wear Pad
Wear Pad
Set Screw