National Crane 600H, Руководство по обслуживанию

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BOOM 600H SERVICE MANUAL
4-10
08-19-2022 Control # 092-13
FOUR SECTION BOOM OPERATION
The boom service and maintenance section of this manual
includes both the three and four section boom information.
Use appropriate information for your particular boom length.
A rod-fed, two-stage double-acting cylinder, attached to the
1
st
, 2
nd
, and 3
rd
boom sections, supports and propels the 2
nd
and 3
rd
boom sections. The extend cables attach to the base
end of the 2
nd
boom section, are reeved around sheaves
attached to the cylinder, and attach to the base end of the 4th
boom section, there fore providing support and extension of
the 4
th
boom section. The 3
rd
section retract cables attach to
the tip end of the 1
st
boom section, are reeved around
sheaves attached to the 2
nd
boom section, and attach to the
base end of the 3
rd
boom section, therefore providing
retraction of the 3
rd
boom section. The 4
th
section retract
cables attach to the tip end of the 2
nd
boom section, are
reeved around sheaves attached to the 3rd boom section,
and attach to the base end of the 4
th
boom section, therefore
providing retraction of the 4
th
boom section. A proportioning
cable attached to the rear of the 1
st
section, reeved around a
sheave at the tip of the 2
nd
section, and anchored to the rear
of the 3
rd
section maintain proper cylinder extension
proportion, therefore maintaining equal boom section
proportion. Detailed service and maintenance is required to
insure smooth and proper operation.
W
i =
12.12 (308mm) at front
12.06 (306) at back near
cylinder anchor bars
W
o
= 11.00 (279mm) at
top forward pad location
W
o
= 10.94 (287mm) at
bottom rear pad location
W
o
= 10.94 (278mm) at
top rear pad location
Top Rear Bottom Rear
W
i
= 12.06 (306 mm) 12.06 (306) mm
-W
o
= -10.94 (-278 mm) -10.94 (-278 mm)
-t
wp
= -0.52 (-13 mm) -0.52 (-13 mm)
-t
wp
= -0.52 (-13 mm) -0.52 (-13 mm)
Clearance Before Shims = 0.008 (2 mm) 0.08 (2 mm)
Left Side Shim = -0.03 (-0.8 mm) -0.03 (-0.8mm)
Final Clearance = 0.05 (1.2 mm) 0.05 (1.2 mm)
Shim Calculation for Wear Pads
(Example)
t
wp =.52 (13mm)
t
wp =.52 (13mm)
FIGURE 4-6
REFERENCE ONLY