National Crane
Published 5-27-2018 Control # 039-06
7-1
800D
SIDE SHIMMING OF BOOM SECTIONS
SECTION 7
SIDE SHIMMING OF BOOM SECTIONS
SECTION CONTENTS
Top/rear Side Pad Adjustment . . . . . . . . . . . . . . . 7-2
Inner Boom Pad Lubrication . . . . . . . . . . . . . . . . . 7-3
Jib Installation And Adjustment . . . . . . . . . . . . . . 7-4
Jib Jack Service & Maintenance . . . . . . . . . . . . . . 7-5
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
(Optional) Oil Cooler Service & Maintenance . . . 7-6
Swing Drive Service . . . . . . . . . . . . . . . . . . . . . . . . 7-8
Lubrication and Maintenance . . . . . . . . . . . . . . . . 7-8
Disassembly Procedure . . . . . . . . . . . . . . . . . . . . 7-8
Assembly Procedure. . . . . . . . . . . . . . . . . . . . . . . 7-9
Rotation Stop-mechanical . . . . . . . . . . . . . . . . . . 7-10
Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . 7-10
Servicing The Control Valves. . . . . . . . . . . . . . . . 7-11
Disassembly and Reassembly of Control
Unloader Valve Service. . . . . . . . . . . . . . . . . . . . . 7-12
Control Valve Relief Adjustment . . . . . . . . . . . . . 7-13
Mid-inlet Relief Adjustment . . . . . . . . . . . . . . . . . 7-13
Unloader Dump Valve – Air Purging
Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14
Hydraulic System Description . . . . . . . . . . . . . . . 7-14
Optional Hydraulic Capacity Alert System . . . . . 7-15
System Adjustment . . . . . . . . . . . . . . . . . . . . . . . 7-15
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16
Maintenance & Repair . . . . . . . . . . . . . . . . . . . . . . 7-18
Center inner boom section in outer boom section.
X
1
= X
2
Calculate shims required.
Gaps X
1
= X
2
= 0.56 in (14.3 mm).
Wear pad thickness (t
wp
) = 0.44 in (11.1 mm).
Add shims as required [each shim is 0.03 in (0.8 mm)] to
tighten the pads so that there is 0.03 in - 0.09 in (0.8 mm -
2.4 mm) total clearance between the sections. 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.
At each pad location add qty-1 0.06 in (1.6 mm) and qty-
1.03 in (0.8 mm) shim for a total clearance of 0.03 in
(0.76 mm).
X1 =
0.56 in (14.3 mm)
- t
wp
=
0.44 in (11.1 mm)
clearance before shims
0.12 in (3.2 mm)
Add shims
0.03 in (0.8 mm)
0.06 in (1.6 mm)
Final clearance
0.03 in (0.8 mm)
FRONT SIDE PAD SHIMS
9402
Reference
Only
Summary of Contents for National Crane 800D
Page 1: ...Operator and Service Manual National Crane 800D F o r R e f e r e n c e O n l y ...
Page 4: ...F o r R e f e r e n c e O n l y ...
Page 252: ...SCHEMATICS 800D 2 Published 5 27 2018 Control 039 06 F o r R e f e r e n c e O n l y ...
Page 255: ...F o r R e f e r e n c e O n l y ...
Page 256: ...F o r R e f e r e n c e O n l y ...