Inspection; Assembly - JLG 400S Service And Maintenance Manual

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Table of Contents

9. If necessary, remove the wear pads from the rear of the

fly boom section.

Inspection

1. Inspect all boom pivot pins for wear, scoring or other

damage, and for tapering or ovality. Replace pins as nec-

2. Inspect lift cylinder pins for wear, scoring or other dam-

age, and for tapering or ovality. Ensure pin surfaces are

protected prior to installation. Replace pins as neces-

3. Inspect telescope cylinder rod attach pin for wear, scor-

ing or other damage. Replace pin as necessary.

4. Inspect inner diameter of boom pivot bushings for scor-

ing, distortion, wear or other damage. Replace bushings

as necessary.

5. Inspect wear pads for wear.

6. Inspect all threaded components for damage such as

stretching, thread deformation, or twisting. Replace as

7. Inspect structural units of boom assembly for bending,

cracking, separation of welds, or other damage. Replace

boom sections as necessary.

SECTION 4 - BOOM & PLATFORM

1. Using JLG threadlocker P/N 0100011 or equivalent,

install the bottom wear pads and shims as noted during

disassembly on the rear of the fly section. Install the rest

of the wear pads on the rear of the fly boom but do not

install the shims or torque them at this time.

2. Using a suitable lifting equipment, lift and slide tele-

scope cylinder into the aft end of fly boom. Align attach-

ment holes in fly boom section with hole in rod end of

telescope cylinder.

3. Install telescope cylinder pin and secure with retaining