Lull 944E-42 Service Manual User Manual download pdf (Page 44)

100

101

General Information, Specifications and Maintenance

2.28

Model 644E-42/944E-42 Rev. 6/04

2.8 REPLACEMENT

ALWAYS use the correct tool when removing or replacing

any part or performing any service.

Some procedures may require the use of specialized

tools. If needed, many of these tools can be obtained

through Snap-on

tool distributors.

Contact:

Snap-on Incorporated

P.O. Box 1410

Kenosha, WI 53141-1410 USA

Phone: 1-262-656-5200

Internet: http://www.snapon.com

Snap-on

is a registered trademark of Snap-on

Technologies, Inc.

Replace o-rings, seals, and gaskets whenever they are

disturbed. NEVER mix new and old seals or o-rings,

regardless of apparent visual condition. ALWAYS

lubricate new seals and o-rings with hydraulic oil before

installation.

2.9 HOSES AND TUBES

2.9.1 Hose and Tube Inspection

1. Damaged, dented, crushed, or leaking hose and

tube fittings restrict oil flow and the operation of the

system being served. Fittings showing signs of

movement from their original position have failed and

must be replaced. ALWAYS replace the entire hose

or tube assembly if the fittings are damaged.

2. Hoses must remain in good condition. Obvious signs

of external hose wear or hydraulic fluid leaking or

weeping indicates the need to replace the hose

assembly. If in doubt, replace the hose.

3. Replace if any of the following conditions exist:

• Ballooning (replace hose immediately!)

• Kinking, crushing, stretching or deforming

• Concealed corrosion of wire reinforcement

• Chafed outer cover

2.9.2 Hose and Tube Installation

1. When installing a new hose, loosely connect each

end and verify that the hose takes up the designed

position before tightening the connection completely.

Tighten clamps sufficiently to hold the hose without

crushing it, and to prevent movement and chafing.

2. If a hose is replaced on a moving part, move the part

through its entire range of motion to verify that the

hose will not incur damage. Adjust as necessary.

3. When installing any hose, verify that it does not

become kinked or twisted.

4. NEVER allow freely moving or unsupported hoses to

contact each other or a related work surface. Such

contact causes chafing and reduces hose life.

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