National Crane 600H, Service Manual

Page: 175 / 232

NATIONAL CRANE
08-19-2022 Control # 092-13
8-7
600H SERVICE MANUAL LUBRICATION
8
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.
Boom Lubrication Inner Wear Pad
1. Fully extend and set the outriggers on a level surface.
1. With the boom fully retracted, fill upper rear pad
retention pockets (pad retainers) with grease. Access
pockets through holes in rear of boom top plate.
2. With boom over rear of truck, fully extend boom and then
lower to the lowest angle possible. It may be necessary
to first turn boom slightly to miss boom rest. The upper
rear pad retention pockets will be under the 1/4 in (6,35
mm) grease access holes in the butterfly plates on the
top of the boom sections.
3. Using a 1/4 in (6,35 mm) diameter nozzle grease gun
adapter, fill pad retention pockets with grease.
4. 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.
5. 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.
6. 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.
7. Raise the boom to at least 75°.
8. Extend the boom about 1/3 and retract to spread the
grease.
9. Repeat steps 3 - 6. Extend the boom about 2/3 and
retract to spread the grease.
10. Repeat steps 3 - 5. Fully extend and retract the boom to
spread the grease.
11. These steps can be repeated as many times as
necessary if unacceptable boom noise or chatter
persists.
Boom Lubrication Side and Bottom Wear
Pad
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 about 75° and retract the boom.
5. Extend and retract the boom several times until the
grease is evenly spread.
6. Repeat steps 1 - 3 as necessary to ensure the boom is
fully lubricated.
Outrigger Beam Lubrication
DANGER
Do not, under any circumstances, work at an elevated
height without using proper fall protection as required by
local, state, or federal regulations.
1
3
2
4
5
Item Description
1
1
st
Boom Section
2
Access Holes for 4
th
Section Wear Pad
3
Access Holes for 3
rd
Section Wear Pad
4
Access Holes for 2
nd
Section Wear Pad
5
2
nd
Section Wear Pad
Inner Boom Wear Pads
FIGURE 8-1
!
REFERENCE ONLY