Lincoln 740 Owner's/Operator's 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.
APRIL - 2004
OWNER/OPERATOR MANUAL
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
• A
VOID 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
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.
One Lincoln Way
St. Louis, MO 63120-1578
(314)679-4394
Form 403453
MODELS 740, 3050©, 81495, 82393
HIGH PRESSURE CONTROL VALVE
RETAIN THIS INFORMATION
FOR FUTURE REFERENCE
© Indicates change
Section
7,500 PSI RATED
Copyright 2004
Printed in U.S.A.
website:
www.lincolnindustrial.com
- 2U
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