Lincoln 740 - User Manual

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FAILURE TO HEED THE FOLLOWING WARNINGS MAY RESULT IN PERSONAL

INJURY AND/OR PROPERTY DAMAGE.

• ALWAYS determine the correct air pressure to operate the lubrication pump

Some air pressure operated pumps can develop pressure over 11,000 psi This

control valve is rated at 7,500 psi when equipped with a steel tube extension and

should not be operated above that pressure When this control valve is used with a

whip hose, the pressure rating is further reduced to the rating of the whip hose The

supply hose rating and any fittings to the control valve must also be considered To

determine the air pressure to operate the lubrication pump at, simply divide the rated

pressure of the lowest rated component on the down stream side of the pump by

the lubricant to air pressure ratio of the pump

EXAMPLE The whip hose attached to the control valve is the lowest rated compo-

nent and has a rating of 4,500 psi If the lubrication pump is a 501 pump, divide 4,500

psi by 50 to determine the correct air pressure setting (4,500 / 50-90 psi) Set the air

regulator that controls the air to the 501 pump to 90 psi or less

• NEVER point the dispensing valve at any part of the body or at another person

• NEVER try to stop or deflect material from the dispensing valve, leaking connection

or component with your hand

• ALWAYS relieve pressure from the system before servicing

•AVOID contact with the nozzle

• ALWAYS attach the spring guarded end of a whip hose to the grease coupling and

the non-spring guarded end to the control valve or gun

Page

Section

- F3

- 2U

Form 403453APRIL - 2004

MODELS 740, 3050©, 81495, 82393

HIGH PRESSURE CONTROL VALVE

7,500 PSI RATED

OWNER/OPERATOR MANUAL

OWNER/OPERATOR

RESPONSIBILITY

It is the owner/operator responsibility to

properly use and maintain this equipment.

The instructions and warnings contained In

this manual shall be read and understood by

the owner/operator prior to operating this

equipment.

If an owner/operator does not understand

English, the contents of this manual shall be

explained in the owner/operator native

language to assure the owner/operator

comprehends.

It is the owner/operator responsibility to

maintain the legibility of all warning and

instruction labels.

The owner/operator shall retain this manual

for future reference to Important warnings,

operating and maintenance instructions.

DESCRIPTION

The control valve is designed to control the

flow of lubricant from high pressure lubricant

pumps.

OPERATION

Before using the valve, always make sure

the air pressure is set correctly to operate

the lubrication pump. Only a small pressure

on the control valve handle is required to

obtain lubricant flow from the nozzle.

The control valve dispenses lubricant when

the handle (45788) Is depressed and the

pull rod (11362) and ball retainer (11363)

move up, compressing the friction spring

(55029), allowing lubricant pressure to

unseat the steel ball (66255) and lubricant to

flow through the control valve. The ball

retainer (11363) limits the travel of the steel

ball (66255) and the lubricant flow rate is

determined by the distance the handle is

depressed.

When the handle (45788) is released, the

friction spring (55029) returns the handle to

its normal position and causes the ball

retainer (11363) to seat the steel ball

(66255) against the check seat (11364)

stopping the lubricant flow through the

control valve.

MAINTENANCE

If lubricant continues to flow from the

coupler after the handle is released, the

steel ball (66255) is not seating against the

check seat (11364).

Remove and Inspect the check seat (11364)

and the steel ball (66265). If the steel ball is

not perfectly smooth, replace it. The check

seat has a ball seat on both sides. If the

ball seat being used Is rough, worn or

pitted, invert the check seat and reassem-

ble the control valve. If both sides of the

check are damaged, replace the check seat

and the steel ball.

See Figure (1) After assembly, the adjust-

ment nuts at the top of the control valve

should be adjusted. To prevent damage to

the check seat, do not adjust for less than

1/32" pull rod travel.

RETAIN THIS INFORMATION

FOR FUTURE REFERENCE

One Lincoln Way

St. Louis, MO 63120-1578

(314)679-4394

Printed in U.S.A.

website:

www.lincolnindustrial.com

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Summary

Owner;Operator Responsibility

Description

Operation

Safety Warnings

Determine Correct Air Pressure

Ensure correct air pressure is set for pump operation, considering component ratings to avoid damage.

Avoid Pointing Valve at Body

Never aim the dispensing valve at yourself or others to prevent injury.

Do Not Stop Flow with Hand

Never use hands to stop or deflect material from the valve or connections.

Relieve System Pressure Before Service

Always release system pressure before performing any maintenance or servicing.

Avoid Nozzle Contact

Prevent contact with the nozzle during operation to avoid burns or injury.

Proper Hose Connection

Connect whip hose spring-guarded end to coupling and non-guarded end to valve/gun.

Maintenance

Troubleshooting Ball Seating Issues

Inspect and replace check seat and steel ball if lubricant continues to flow after release.

Adjustments After Assembly

Adjust nuts at the top of the control valve after assembly, avoiding less than 1/32" pull rod travel.

Service Parts

Parts List

Detailed list of part numbers, quantities, and descriptions for the control valve and related components.

Coupling Nut and Inlet Specifications

Chart detailing coupling nut and inlet thread sizes for different models.

Warranty Information

Limited Warranty Terms

Details Lincoln's one-year warranty for defects, repair/replacement conditions, and exclusions.

Warranty Limitations and Liability

Specifies warranty exclusions for damage, limits liability to purchase price, and notes jurisdictional rights.

Contact Information

International Warranty Contact

Instructions for customers outside Western Hemisphere/East Asia to contact Lincoln GmbH & Co. KG.

Nearest Service Center

Information on how to find Lincoln Industrial's nearest service center via phone or website.