Manitowoc National Crane NBT30H-2, Руководство по обслуживанию

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8
National Crane
03-20-2019 Control # 613-06
8-7
NBT30H-2 SERVICE MANUAL LUBRICATION
Internal Cable Sheave Lubrication
A grease gun adapter is required to lubricate the internal
sheaves. The required needle grease gun fitting is:
• A 0.25 inch (6.35 mm) diameter nozzle grease gun tip
(National Crane P/N 955045).
• Contact Manitowoc Crane Care to obtain this tip.
Lubrication of the extend and retract sheaves is as follows:
1. Extend the boom until the grease access holes on the
side of the 2
nd
and 3
rd
sections are lined up.
2. Lubricate the pin for the extend cable sheaves (18)
(Figure 8-1) until a small amount of grease extrudes
from the pin. From in front of the boom, look back
through the sheave case at the pin to determine the
amount of grease.
3. This position also aligns the access holes in the rear of
the 1
st
and 2
nd
sections for lubrication.
4. Lubricate the pins for the retract sheaves until a small
amount of grease extrudes from the sheave pins. From
in back of the boom, look up through the hoist mount at
the pins to determine the amount of grease.
Inner Boom Wear Pad Lubrication
1. Fully extend and set the outriggers.
2. With the boom fully retracted, remove the access
plate (6) located on the top rear of the 1
st
section
(Figure 8-2).
3. Apply grease to the wear pads on the top of the 2
nd
section through the access holes (4) in the 1
st
section
with a grease gun (Figure 8-2).
4. Extend the boom to line up the access holes on the 2
nd
section (3) with the wear pads on the 3
rd
section. Apply
grease to the 3
rd
section wear pads with a grease gun.
5. Extend the boom to line up the access holes (2) on the
3
rd
section with the wear pads on the 4
th
section. Apply
grease to the 4
th
section wear pads with a grease gun.
6. Raise the boom to at least 75°.
7. Extend the boom about 1/3 and retract to spread the
grease.
8. Repeat steps 3 - 6. Extend the boom about 2/3 and
retract to spread the grease.
9. Repeat steps 3 - 5. Fully extend and retract the boom to
spread the grease.
Side and Bottom Boom Wear Pad
Lubrication
Recommended lubricant is EP-3MG grease.
1. Fully extend and set the outriggers.
2. Lower the boom to horizontal.
3. Fully extend the boom and apply grease to the side and
bottom of the 2
nd
, 3
rd
, and 4
th
sections with a brush.
4. Raise the boom to 75° and retract the boom.
5. Extend and retract the boom several times until the
grease is evenly spread.
6. Repeat as necessary.
WARNING
Fall Hazard!
Do not, under any circumstances, work at an elevated
height without using proper fall protection as required by
local, state or federal regulations.
!