SECTION 4 - BOOM & PLATFORM
3121142
– JLG Lift –
4-43
4.3
BOOM LUBRICATION APPLICATION
This procedure applies to booms after assembly or during
annual application using Super Lube® lubricant (JLG p/n
3020042).
1.
Position the boom on the boom rest using the 500lb
capacity setting.
2.
Telescope main boom section as far as it will extend at
this position, approximately 3 ft. (0.9 m).
3.
From the front of the machine (boom pivot end), moder-
ately apply lubricant to the interior surfaces of the base
boom, inner mid boom, and outer mid boom. To pre-
vent misdiagnosis of hydraulic leaks, take care to pre-
vent excessive application of lubrication.
4.
At the rear of the machine, apply lubricant to the side,
top and bottom surfaces of the fly boom, outer mid, and
inner mid specifically to wear pad contact paths. To pre-
vent misdiagnosis of hydraulic leaks, take care to pre-
vent excessive application of lubrication.
5.
After application of the lubricant is complete, cycle the
boom through its full range of travel 2 times.
4.4
BOOM SHIMMING PROCEDURE
1.
Measure and record the dimension and direction of any
sweep found in the fly boom section. Measure and
record the inside width and inside height of the outer
mid boom opening.
NOTE:
Wear Pad bolt lengths should be flush to one thread below
the surface of the insert. When installing wear pads in the
following steps, the wear pad bolt lengths may need to be
adjusted as shim thicknesses are adjusted.
2.
Install the side wear pads on the fly boom sides. Shim as
necessary to match the outer mid boom dimension
recorded in step 1 ± 1/32” (± 0.8 mm). Shims should be
divided as evenly as possible between the side pads
unless corrections are needed to compensate for sweep
recorded in step 1. If the sweep is to the left the internal
side pads on the left should have more shims than the
right side pads and vise versa.
3.
Install the bottom wear pad(s) and shims if applicable
on the fly boom.
SWEEP
MEASUREMENT
TOP VIEW OF BOOM SECTION
Figure 4-14. Measuring Boom Section Sweep
Summary of Contents for 1200SJP
Page 1: ...Service and Maintenance Manual Models 1200SJP 1350SJP P N 3121142 November 8 2016 AS NZS...
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Page 20: ...xiv JLG Lift 3121142 LIST OF TABLES TABLE NO TITLE PAGE NO This page left blank intentionally...
Page 51: ...SECTION 3 CHASSIS TURNTABLE 3121142 JLG Lift 3 5 This page left blank intentionally...
Page 58: ...SECTION 3 CHASSIS TURNTABLE 3 12 JLG Lift 3121142 Figure 3 11 Axle Loctite Application...
Page 64: ...SECTION 3 CHASSIS TURNTABLE 3 18 JLG Lift 3121142 Figure 3 13 Drive Hub Sheet 1 of 2...
Page 173: ...SECTION 3 CHASSIS TURNTABLE 3121142 JLG Lift 3 127 Figure 3 75 EMR2 Fault Codes Sheet 1 of 5...
Page 174: ...SECTION 3 CHASSIS TURNTABLE 3 128 JLG Lift 3121142 Figure 3 76 EMR2 Fault Codes Sheet 2 of 5...
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Page 248: ...SECTION 4 BOOM PLATFORM 4 14 JLG Lift 3121142 Figure 4 7 Boom Assembly Sheet 7 of 7...
Page 305: ...SECTION 4 BOOM PLATFORM 3121142 JLG Lift 4 71 Figure 4 31 Outer Mid Boom Extend Retract Cables...
Page 306: ...SECTION 4 BOOM PLATFORM 4 72 JLG Lift 3121142 Figure 4 32 Fly Boom Extend Retract Cables...
Page 323: ...SECTION 4 BOOM PLATFORM 3121142 JLG Lift 4 89 Figure 4 37 Rotator Counterbalance Valve...
Page 352: ...SECTION 5 HYDRAULICS 5 28 JLG Lift 3121142 Figure 5 28 Steer Pressure Adjustments...
Page 379: ...SECTION 6 JLG CONTROL SYSTEM 3121142 JLG Lift 6 3 Figure 6 2 Control System Block Diagram...
Page 388: ...SECTION 6 JLG CONTROL SYSTEM 6 12 JLG Lift 3121142 Figure 6 10 Control Module Location...
Page 457: ...SECTION 6 JLG CONTROL SYSTEM 3121142 JLG Lift 6 81 Figure 6 24 Fault Code Light Location...
Page 490: ...SECTION 6 JLG CONTROL SYSTEM 6 114 JLG Lift 3121142 Figure 6 31 CANbus Circuit...
Page 508: ...SECTION 6 JLG CONTROL SYSTEM 6 132 JLG Lift 3121142 Figure 6 32 Moment Chart...
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