Manitowoc National Crane 500E2 Service Manual

National Crane Published 08/16/19 Control # 112-05 4-9
500E2 SERVICE MANUAL BOOM
4
2. With the inside/outside calipers, measure the outside
width of the inner section (W0) at each side pad location.
Record the largest measurement.
3. Measure the thickness of the wear pads and record
(twp).
4. Subtract the largest outside width (W0) of the inner
section and the thickness of the two pads (t
wp
) from the
inside width of the outer section (Wi). Add shims as
required [each shim is 0.03 inches (0.8 mm) thick) to
tighten the pads so that there is 0.03 inch – 0.09 inch
(0.8 mm – 2.3 mm) clearance between the widest part of
the inner boom and the most narrow part of the outer
boom when shims and pads are installed. In some cases
it will be necessary to have an unequal number of shims
behind the pads at the top and bottom side pad
locations. See example.
W
o
2 PLCS
TOP
W
o
1 PLC
BOTTOM
INNER SECTION
t
wp
t
wp
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)

Manitowoc National Crane 500E2 Specifications

General

Brand	Manitowoc
Model	National Crane 500E2
Category	Construction Equipment
Language	English