BOOM ASSEMBLY REPLACEMENT - TM-10-3930-673-340619

TM 10-3930-673-34

16-11. BOOM ASSEMBLY REPLACEMENT

This Task Covers:

a. Removal

b. Installation

INITIAL SETUP

Materials/Parts

Tools and Special Tools

Compound, Anti-seize (Item 10, Appendix B)

Tool Kit, General Mechanic's: Automotive

Tags (Item 55, Appendix B)

(Item 23, Appendix D)

Locknut

Shop Equipment, Automotive Maintenance and

Locknut (2)

Repair; Field Maintenance, Basic, Less Power (Item

Locknut (2)

18, Appendix D)

Lockwashers (4)

Cap and Plug Set (Item 1, Appendix D)

Lockwasher (8)

Lifting Device, 3-ton (2721.55 kg) capacity

Wood Blocks

Jackstand

Container, 5 gal (19.1) capacity

Equipment Condition

Personnel Required

Attachment cylinder removed

Two

(TM 10-3930-673-20)

Attachment removed (TM 10-3930-673-20)

Counterweight removed (TM 10-3530-673-20)

Transmission cover removed

(TM 10-3930-673-20)

Boom assembly fully retracted

(TM 10-3930-673-10)

NOTE

In this procedure, the inner, intermediate, and outer boom sections are removed as a unit. For removal

of individual boom sections, refer to paragraphs 16-12, 16-13, and 16-14.

WARNING

Before removal of complete boom assembly, remove the countweight. Failure to remove the

counterweight will result in the machine being rear end heavy and rear tipping may occur.

Hydraulic oil in the system can be under pressures over 3000 psi (20685 kPa) with the engine OFF.

ALWAYS relieve pressure in hydraulic lines before attempting to remove any component in the

hydraulic system. With engine OFF, move control levers through all operating positions several

times to relieve line pressure. Relieve pressure in hydraulic oil tank by loosening filler cap very

slowly. Failure to follow these precautions could result in serious personal injury.

Boom assembly including boom extend cylinder weighs approximately 4100 lb (1859.72 kg).

Attach suitable lifting device prior to removal to prevent possible injury to personnel.

Change 1

16-43