INNER BOOM REPLACEMENT/REPAIR

TM 10-3930-673-34

16-12. INNER BOOM REPLACEMENT/REPAIR

This Task Covers:

a. Removal

c. Cleaning

e. Assembly

b. Disassembly

d. Inspection

f. Installation

INITIAL SETUP

Materials/Parts - Continued

Tools and Special Tools

Rags, Lint-free (Item 34, Appendix B)

Tool Kit, General Mechanic's: Automotive

Tags (Item 55, Appendix B)

(Item 23, Appendix D)

Tape, Electrical (Item 56, Appendix B)

Shop Equipment, Automotive Maintenance and

Locknut

Repair; Field Maintenance, Basic, Less Power

Locknut

(Item 18, Appendix D)

Locknut (4)

Cap and Plug Set (Item 1, Appendix D)

Lockwasher (4)

Lifting Device, 2 ton (1814.37 kg) capacity

Lockwasher (8)

Pin, Cotter

Equipment Condition

Ring, Retaining

Transmission cover removed

Ring, Retaining (2)

(TM 10-3930-673-20)

Ring, Retaining (2)

Carriage removed (TM 10-3930-673-10)

Ring, Retaining (2)

Boom level and retracted (TM 10-3930-673-10)

Container, 5 gal (19 l) capacity

Counterweight removed (TM 10-3930-673-10)

Rope, 25 ft (7.6 m) (2)

Rope, 30 ft (9.14 m)

Materials/Parts

Wood Blocks

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

Compound, Sealing (Item 40, Appendix B)

Personnel Required

Three

WARNING

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 and boom fully lowered,

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.

At operating temperatures, hydraulic oil is hot and under pressure. Hot oil can cause

injuries. Allow hydraulic oil to cool before disconnecting any hydraulic lines.

Inner boom weldment and boom extend cylinder weighs approximately 1500 lbs

(680.39 kg). Attach suitable lifting device prior to removal to prevent possible injury to

personnel.

CAUTION

Wipe the area clean around all hydraulic connections to be opened during removal and

disassembly. Cap hydraulic oil lines and plug holes in fittings and quick-disconnects

after removing lines. Contamination of the hydraulic system could result in premature

failure.

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