Tower Boom Lift Cylinder Installation - JLG 740AJ Service And Maintenance Manual

Hide thumbs Also See for 740AJ:

Table of Contents

SECTION 5 - BASIC HYDRAULIC INFORMATION AND SCHEMATICS

Tower Boom Lift Cylinder Installation

1. Support the main boom and tower boom, place the

tower lift cylinder on the turntable and align the holes.

Install the cylinder barrel pin and torque the bolt to 285

ft. lbs. (388 Nm). Use JLG Threadlocker P/N 0100011 on

2. Remove caps from cylinder hydraulic lines properly and

install lines to cylinder as previously tagged.

3. Using auxiliary power, activate tower lift function and

extend cylinder rod until the cylinder rod bushing aligns

with bushings on boom.

4. Using an appropriate brass drift, drive the tower lift cyl-

inder rod end attach pin through the aligned bushings.

Secure pin and torque the bolt 35 ft. lbs. (48 Nm). Use

JLG Threadlocker P/N 0100011 on bolts.

5. Remove main boom support and lifting device support-

ing the upright.

6. Using all applicable safety precautions, operate the

boom functions. Check for proper operation and

hydraulic leaks. Secure as necessary.

7. Check fluid level of hydraulic tank and add fluid, if