Page Number - 4
AIR OPERATEDLUBRICATION UNIT
MODELS 4417, 4459, 4489
BARE PUMP ASSEMBLIES
274216 & 274217
Form 402006
INITIAL PUMP PRIMING
When the pump is operated for the first time, the pump will have to be primed. To prime the pump, remove the grease hose from
the pump lube outlet and set aside. Connect the airline to the air inlet of the pump with an air pressure of less than 20 PSIG.
Slowly increase the air pressure to the pump until the pump begins to operate very slowly. Allow the pump to operate at the slow
speed until lubricant begins to flow out of the pump lube outlet. This priming process may take 2 minutes or more to fully prime a
pump tube.
After lubricant, free of air begins to flow from outlet, stop the pump. Attach the high pressure hose and control valve to the pump
lubricant outlet. Restart the pump and hold the control valve nozzle in a suitable container while holding the control valve open to
prime the hose and control valve. Increase the air pressure to the pump as required, keeping it operating.
After the pump and hose have been primed and are free of are, the air pressure may be increased to the desired operating pres-
sure. Check for leaks at all connections.
BASIC PUMP OPERATION
The air pressure should be adjusted so that the pump can overcome the backpressure in the lube fitting. Too much air pressure
can cause the pump to deliver grease very rapidly, causing damage to the equipment being lubricated.
Connect the grease coupler to an appropriate grease fitting and open the control valve by squeezing the handle. Hold the control
valve open until the desired volume of grease is dispensed, and release the handle. The pump will stop operating by stalling
against the pressure developed in the hose and control valve. Due to hose expansion, this may take a minute or more to fully
stall.
When the pump is not in operation, disconnect the air supply to the pump and relieve all pressure on the control valve and grease
hose.
See Pressure Relief Procedure
, below
In normal operation, an air pocket may be formed in the grease, causing the pump to loose prime. Simply removing the pump
from the container and re-inserting the pump tube into a fresh area of grease and shaking the container to dislodge the air pocket
may restore the pump to operation. See priming instructions above.
Followers are recommended with lubricants that do not readily seek their own level, or in cold temperature conditions. They help
by keeping the grease on an even level and reduce the air pockets that can form in the grease by the removal of grease by the
pump from the bottom of the container.
CONTROL VALVE OPERATION
Before using the valve, always make sure the air pressure is set correctly to operate the lubrication pump.
DO NOT EXCEED
THE MAXIMUM PRESSURE RATING OF THE LOWEST RATED COMPONENT CONNECTED TO THE PUMP OUTLET!
Only
a small pressure on the control valve handle is required to obtain lubricant flow from the nozzle.
NEVER
point the control valve nozzle at any place on the body or another person. Should a leak develop in the grease hose,
control valve or any attachment to the pump, discontinue use of the pump assembly, perform the Pressure Relief Procedure,
below, and repair leak. NEVER attempt to stop or deflect leaking material from the control valve or any other of the pump compo-
nents with your hand or any other body part.
PRESSURE RELIEF PROCEDURE
The following procedure should be used whenever it becomes necessary to perform any service on the pump and when the pump
is not to be in operation for an extended period.
Disconnect the air supply from the pump air inlet.
Direct the grease coupler on the end of the control valve into a suitable container and open the control valve by squeezing
the lever. Lubricant pressure will be dissipated as the grease flows out of the grease coupler.
After all grease flow stops, the pressure has been relieved and the pump can be serviced.
PUMP REPAIR
These pumps are designed for relatively simple repairs. In most cases wear will be limited to the soft parts used in the pump and
replacement of these items is all that is necessary. See illustrations on the following pages for the pump break down and service
parts. Service kits consisting of the normal wear items are available and listed in the parts list on the following pages.
Contact your nearest authorized Lincoln Service Dealer or Lincoln Technical Services Department for assistance.
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To order call 1-800-548-1191 or visit www.partdeal.com - [email protected]
