National Crane 600H, Руководство по обслуживанию

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BOOM 600H SERVICE MANUAL
4-6
08-19-2022 Control # 092-13
11. Inspect all sheave pins for nicks, gouges or pitting due to
rust in the bearing surface area. Replace if any damage
is evident.
12. Inspect all grease fittings and grease paths in pins to
ensure proper grease flow. Clean and replace as
required.
13.
Inspect all wear pads for excessive wear, gouges, or
abnormal conditions. Clean and replace as required.
THREE SECTION BOOM ASSEMBLY
NOTE: Do not use Loctite on any cable threaded ends.
Always use the locknut and nut provided.
When initially assembling threaded ends of cables,
thread the first nut on past the flat in the cables so
adjustment can be made later.
Refer to Inner Wear Pad Calibration pg 4-8 of this
section to determine Wear Pad shim thickness.
1. Assemble sheaves into 3
rd
section sheave case. Top
sheave is to be installed to the left hand side of the boom
with the spacer to the right hand side.
2. Attach rear wear pads on bottom of 3
rd
section. Using
Loctite 243 blue, Loctite all wear pad mounting
capscrews.
3. Install 3
rd
section boom into 2
nd
section. Slide together
approximately 5 ft (150 cm).
4. Assemble bottom front wear pads for 2
nd
section and
Teflon plugs. Attach pads to pad plate.
5. Using appropriate lifting device, lift 3
rd
section to allow
for wear pad/pad plate installation in front of 2
nd
. Install
wear pad/pad plate assembly. Slide sections together
within 12 in (30 cm) of full retraction.
6. Install front side wear pads with appropriate shims,
between 3
rd
and 2
nd
sections. If boom has been
disassembled, and no sections have been replaced, use
same shim quantity and location as was previously
used.
7. Route anti-two-block wire through 3
rd
section, keeping
bulk of wire at the rear of the boom sections. Routing
can be accomplished using an installation tool, such as
a telescopic boom grease applicator, electrical conduit,
or hydraulic tubing. Route anti-two-block wire between
sheave case side plates. If locations are in question,
refer to Shim Calibration Section in this manual.
8. Uncoil retract cable assemblies, and insert button end
into anchors in back of the 3
rd
section. Place uncoiled
cable in area that will minimize the potential for damage.
9. Assemble retract sheaves and retract sheave pins in
rear of 2
nd
section. Coat surfaces of bearings with
grease before assembly.
10. Place retract cables over top of retract sheaves. Install
keeper capscrew above sheave to hold retract cables in
place.
11. Reeve cables over retract sheave and install keeper/
wear pad to bottom rear of 2
nd
section. This pad acts as
a side pad, bottom pad, and a cable retainer.
12. Assemble exterior extend cylinder components. Install
and center sheave pin into butt plate of extend cylinder.
Install bearings into extend cable sheaves. Coat surface
of bearings with grease and assemble extend sheaves
on sheave pin.
13. Wrap approximately 10 ft (300 cm) of each 5/8 in (15.88
mm) diameter extend cable around extend sheaves and
install extend cable anchor. Do not tighten capscrews
clamping anchor together completely. These capscrews
if tightened completely will not allow cable anchor to
install into 3
rd
section. Route anti-two-block cable over
center sheave on extend cylinder.
14. Install wear pad over extend cylinder sheave side plates.
This serves as a wear pad to keep the end of the extend
cylinder centered in the boom, as well as an extend
cable retainer.
15. Slide extend cylinder /extend cables into 2
nd
/3
rd
boom
assembly enough to assemble extend cable anchor into
bottom rear of 3
rd
section. Route anti-two-block cable
over extend cable anchor as anchor slides into 3
rd
section. Be aware of extend and anti-two-block cable
location when inserting cylinder into boom sections,
inadvertent crushing or other damage to cables will
warrant replacement.
16. Tighten capscrews clamping extend anchor together.
These capscrews will protrude through the 3
rd
section
bottom plate, locking the anchor in position.
17. Loop anti-two-block cable at the extend cable anchor in
the 3
rd
and install anti-two-block cable clamp. Do not
completely tighten clamp capscrew.
18. Assemble anti-two-block clamp in the sheave case.
Reeve anti-two-block cable around anchor and through
holes in side plate of sheave case. Pull approximately 2
ft (60 cm) of cable out the end of the boom for proper
routing and termination.
19. Tighten anti-two-block clamp on the extend cable anchor
in the rear of the boom. Tension anti-two-block cable
from the sheave case end of the boom, and tighten anti-
two-block clamp located in sheave case.
20. Visually verify that the extend and anti-two-block cables
are properly routed on their sheaves and continue to
slide the extend cylinder and cables into the boom
sections. Keep extend and anti-two-block cables
supported and slightly tensioned during insertion of
cylinder, to maintain proper cable placement.
REFERENCE ONLY