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Back
. Installation-CONT.
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TM-10-3930-673-20-2 All Terrain Lifter Army System (ATLAS) 10 000 lb Capacity Manual
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Removal - TM-10-3930-673-20-20555
TM 10-3930-673-20-2
16
18-5. MAIN CONTROL VALVE ADJUSTMENT/REPLACEMENT
This Task Covers:
a. Removal
c. Main Relief Valve Adjustment
e. Boom Hoist Relief Valve Adjustment
b. Installation
d. Boom Extend Relief Valve Adjustment
f. Boom Lower Relief Valve Adjustment
INITIAL SETUP
Materials/Parts
Tools and Special Tools
Compound, Sealing (Item 28, Appendix C)
Tool Kit, General Mechanic's: Automotive
Rags, Wiping (Item 26, Appendix C)
(Item 18, Appendix F)
Tags (Item 39, Appendix C)
Cap and Plug Set (Item 3, Appendix F)
Container, 1 gal (3.79 l) capacity
Pressure Gage (Item 6, Appendix F)
Lifting Device, 5 ton (435.92 kg) capacity
Packings Preformed (15)
Equipment Condition
Personnel Required
Boom raised and blocked (TM 10-3930-673-10)
Two
Transmission cover removed (Para 16-5)
References
TM 10-3930-673-10
a. Removal.
WARNING
Hydraulic oil in system can be under pressures over 3000 psi (20685 kPa) with engine OFF.
ALWAYS relieve pressure in hydraulic hoses before attempting to remove any component in
hydraulic system. With engine OFF, starter switch in RUN position, and attachment on ground,
move control levers through all operating positions several times to relieve hydraulic pressure.
Relieve pressure in hydraulic oil tank by loosening filler cap very slowly. Failure to follow these
precautions could result in serious injury or death to personnel.
At operating temperatures, hydraulic oil is hot and under pressure. Hot oil can cause injury to
personnel. Allow hydraulic oil to cool before disconnecting any hydraulic hoses.
When working underneath boom, always support boom using blocks, jackstands, or other rigid and
stable supports. Combined weight of boom and attachment is approximately 6300 lb (2857.63 kg).
Failure to adequately support the boom could result in severe injury or death to personnel.
CAUTION
Wipe area clean around all hydraulic connections to be opened during removal and disassembly. Cap
oil hoses and plug holes. Contamination of hydraulic system could result in equipment failure.
NOTE
Use suitable container to catch any hydraulic oil that may drain from system.

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