Installation - JLG 400S Service And Maintenance Manual

Installation

NOTE: The 400S main boom alone weighs approximately 1300
lbs. (600 kg). The 460 SJ main boom alone weighs approxi-
mately 1700 lbs. (790 kg)
1. Using all applicable safety precautions, carefully lift
boom assembly to align the pivot holes in the boom
with those of the turntable.
2. Using a soft head mallet, install the pivot pin #3 into the
turntable. Install the bolt and keeper pin securing the
boom pivot pin #3 to the turntable.
3. Using an adequate supporting device, align the master
cylinder with the mounting holes on the boom and
turntable.
NOTE: The master cylinder weighs approximately 66 lbs. (30 kg).
NOTE: When installing the master cylinder rod end pin, insert the
keeper hardware pin to prevent the pin from inserting too
far.
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4. Extend the master cylinder by using auxiliary power if
NOTE: The main boom lift cylinder weighs approximately
5. Using an adequate supporting device, align the main
6. Extend the main boom lift cylinder by using auxiliary
7. Remove cap or plugs and connect hydraulic lines to tele-
MASTER CYLINDER
MAIN LIFT
CYLINDER
Figure 4-14. Main Boom Installation
SECTION 4 - BOOM & PLATFORM
required. Install the master cylinder rod end pin #2 into
the base boom. Using a soft head mallet, install mount-
ing hardware secured to the master cylinder rod end pin
into the base boom section.
260 lbs. (118 kg).
boom lift cylinder with the mounting holes on the boom
section.
power if required. Using a soft head mallet, install hard-
ware to secure the main boom lift cylinder rod end pin
#1 into the base boom section.
scope cylinder as tagged during removal. Torque hose
fittings to 40 ft. lbs. (55 Nm).
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MAF01900
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