Lincoln A Series User manual

Model A52347R-248 (250-275
Gal
Form 402002
APRIL - 2005
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMPS
SERIES “A”
SINGLE ACTION FLUID PUMP
Model 4491 (250-275 Gal)
Model 4490 (16-55 Gal)
Model 4492
(Stub Pump)
Section Page
-A6 -63

Page Number - 2
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMP
Form 402002
Table of Contents
Safety....................................................................................2 & 3
Specification……………………………………………………….2
Description..................................................................…………2
Appropriate Use.........................................................................2
Installation…..……………........……………………………3
Bung Bushing Installation............................................................3
Stand Pipe Installation.................................................................4
Pressure Relief Procedures........................................................7
Repair and Service Parts ……………………………………......7-10
Troubleshooting.......................................................................11
SAFETY
Read and carefully observe these operating instructions
before operating the Air Pump. The pump must be operated,
maintained and repaired exclusively by persons familiar with
the operation instructions. Operate the pump only after safety
instructions and this operation manual is fully
understood.
Adequate personal protection is recommended to prevent
splashing of material on the skin or in the eyes.
Always disconnect air coupler from pump when the pump is
not being used.
Always wear eye protection.
If any fluid appears to penetrate the skin, get emergency
medical immediately. Do not treat injury as a simple cut.
Tell attending physician exactly what fluid was injected.
SPECIFICATIONS
Pump ratio (max) 3.5:1
Output per stroke 5.6 in³ (91 cm³)
Delivery output 6 GPM
Pneumatic Inlet pressure (max) 120 Psig (8.3 Bar)
(min) 20 Psig (1.4Bar)
Operating temperature range 30° to 120°F (-1° to 49°C)
Weight (empty) 14 lbs.
Pneumatic port inlet 1/4-18 NPTF
Material port outlet 1/2 NPTF
Recommended Fluids Petroleum based &
synthetic motor oils,
transmission fluid,
petroleum based hydraulic
fluids.
Suction Head Primed Pump 12 PSIG (.83 Bar) @
90 PSIG Air Inlet
DESCRIPTION
Models 4490, 4491 and 4492 are air operated single acting
pumps for dispensing low and medium viscosity lubricants
from tanks or drums. The pumps are self-priming. Model
4490 is for use in 16-55 gallon drums with the bung bushing
(supplied). Model 4491 is designed for placement into 250-
275 gallon bulk tanks with the bung bushing (supplied).
Model 4492 is a stub pump that may be attached to a reservoir
standpipe using the 1-1/2 NPT thread at the base of the pump.
It may also be used with an optional suction kit (such as Lin-
coln Model 85949) and hose for large bulk tanks by removing
the supplied suction tube check from the pump and attaching
a suction tube to the 1” NPT thread at the base of the pump.
The suction tube must include a check valve for the pump to
operate properly.
IMPORTANT: The pump will not operate without a foot valve.
Contact Lincoln Technical Services for any modifications to the
pump tube.
APPROPRIATE USE
The pump is for pumping low and medium viscosity lubricants.
These lubricants include automotive petroleum based and
synthetic motor oils, transmission fluids, and petroleum based
hydraulic fluids.
It is dangerous to dispense fluids that are not recom-
mended with this pump. Failure to heed this warning
may cause serious damage or injury. These pumps are
not intended, nor should it be used to pump fuels, such as
gasoline, fuel oil, or Diesel fuels. Many solvents and fluids
such as windshield washer solvent, anti freeze, brake fluid
and water will damage pump components and may cause
pump to seize, rendering the pump unusable. Any other
use not in accordance with instructions will result in loss of
claim for warranty or liability.
The pump is designed for delivering lubricants directly from a
reservoir into another container, crankcase, or gearbox. They
may be used with tank mounted or small overhead reel appli-
cations with or without fluid meters.
The pumps are to be operated with clean, dry compressed
air only. Operation with flammable gasses is prohibited.
Maximum air pressures should not be exceeded. Failure
to heed this warning may result in serious personal injury,
property damage, and failure of the pump.

Page Number - 3
Form 402002
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMP
FAILURE TO HEED THE FOLLOWING WARNINGS INCLUDING MISUSE, OVER PRESSURIZING, MODIFYING PARTS,
USING INCOMPATIBLE CHEMICALS AND FLUIDS, OR USING WORN OR DAMAGED PARTS, MAY RESULT IN EQUIP-
MENT DAMAGE AND/OR SERIOUS PERSONAL INJURY, FIRE, EXPLOSION, OR PROPERTY DAMAGE.
• Do not exceed the stated maximum working pressure of the pump or of the lowest rated component in your system.
• Do not alter or modify any part of this equipment.
• Do not operate this equipment with combustible gas or fuel, gasoline, diesel fuel, kerosene, etc.
• Do not attempt to repair or disassemble the equipment while the system is pressurized.
• Make sure all fluid connections are securely tightened before using this equipment.
• Always read and follow the fluid manufacturer’s recommendations regarding fluid compatibility, and the use of
protective clothing and equipment.
• Check all equipment regularly and repair or replace worn or damaged parts immediately.
• Never point the dispensing valve at any part of the body or at another person.
• Never try to stop or deflect material from dispensing valve or leading connection or component with your hand or body.
• Always check equipment for proper operation before each use, making sure safety devices are in place and operating
properly.
• Always follow the pressure relief procedure after shutting off the pump, when checking or servicing any part of the system,
and when installing, cleaning or changing any part of the system.
INSTALLATION
Pumps are tested in light oil before shipment. To avoid system
contamination, flush the pump with the lubricant to be dis-
pensed before installing the pump.
Flush all supply lines, hoses, reels and fittings used in the dis-
pensing system with mineral spirits or other petroleum based
solvent to remove dirt, chips and other foreign matter that may
damage the pump or other system components. The compo-
nents should be blown dry with air after flushing.
Placement of a low restriction shut-off valve (such as a ball
or gate valve) into the system between the pump outlet and
overhead delivery system is recommended. This will allow the
pump to be removed from the system for service without drain-
ing the entire system down.
Lincoln recommends using a mini regulator #602003 (1/4” NPT
port size) with an air pressure gage #247843 in the air supply
line to the pump to regulate the air pressure to the pump.
Lincoln does not recommend using Teflon tape pipe sealant
when making connectins to this pump.
Bung Bushing Installation
• Apply pipe thread sealant to threads of pump tube and
thread into ¾ NPT female threads on bottom side of pump
body. Tighten for leak free joint.
• Thread bung bushing into 2” NPT bung on top of reservoir
drum or tank. (See illus. #2) Tighten bung bushing securely
into bung thread. (Illus. #2 is illustrating a 55-gallon drum;
other containers will be installed in a similar manner.)
• Insert pump tube through collet in bung bushing and place
pump as close to bung bushing as possible. Pump tube
should rest on bottom of drum or reservoir
Illustration 1
Bung Bushing Installation in Tank or Drum.
Note: 55 Gal Drum Shown, 16 Gal, 250 Gal, & 275 Gal are
similar.

Page Number - 4
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMP
Form 402002
• Position the pump as desired above the drum or tank, and
tighten the lock nut securely so that collet locks the pump
tube in place.
Stand Pipe Installation
• Apply pipe thread sealant to threads of pump tube and
thread into 3/4 NPT female threads on bottom side of pump
body. Tighten for leak free joint.
• The use of a 1-1/2 NPT union is recommended for instal-
lation of the pump in a standpipe system. Enough clear-
ance should be provided to clear the stub foot valve on the
bottom side of the pump. (See illus. #2) A shut off valve
should also be installed ahead of the pump standpipe so
that the pump can be removed for service without the ne-
cessity of draining the tank for pump removal.
• Apply pipe thread sealant to 1-1/2 NPT male thread on
bottom of pump body and thread into stand pipe union,
tightening securely for leak free joint.
• Install the union onto the standpipe, adjust the position of
the pump and tighten the union.
• Install connections to pump outlet. Open the shut-off valve
ahead of the pump, and check for leaks. (All connections
to pump outlet must be complete, and control valves must
be closed before opening the valve between the pump and
a full tank of lubricant. Otherwise the tank may be drained
through the pump.)
The pumps may be used with suction tube configurations
other than those listed above. Any alternate suction tube must
include a check valve if the supplied pump tube is not going to
be used. A 1” NPT female pipe thread is provided at the pump
base for connection with alternate pump tube configurations.
Lincoln #85949 Universal Suction Kit includes a suction tube
that may be cut to fit. A foot valve is also included with the kit.
Lincoln #84945 Remote Suction Kit includes a suction tube,
hose, and bung bushing. A separate foot valve will have to
be used with this kit. The remote kit will allow the pump to be
mounted separate from the reservoir. A Lincoln #84940 Wall
Bracket, for example, may be used to secure the pump to a
wall or other stationary surface. The lubricant barrel can be
easily changed without removing the entire pump from the
lubricant reservoir.

Page Number - 5
Form 402002
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMP
Model 4492
Stub Pump
Illustration #2

Page Number - 6
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMP
Form 402002
Model 4491
250-275 Gallon
Illustration 3
Model 4490
16-55 Gallon
Illustration 3

Page Number - 7
Form 402002
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMP
SYSTEM START-UP
When operating the pump in a system for the first time, air
must be purged from the system. Expelling air from the pump
is very critical for the pump to prime and operate reliably.
Before connecting the pump to a system, make sure the pump
is placed into a container of the oil that is to be dispensed.
Connect a short length of hose to the pump outlet and direct
the open end of the hose into a container to catch the oil. Op-
erate the pump at low air pressure, 20-40 PSI, until the pump
primes, and oil flows smoothly from the end of the hose.
The system can now be connected to the pump outlet. Purge
the entire system in a similar manner, slowly pumping oil
through all reels and control valves until oil, free of air, flows
smoothly from each outlet.
PRESSURE RELIEF PROCEDURE
The following procedure should be followed when it becomes
necessary to shut the system down for service or container
changes.
• Disconnect the air supply from the air inlet of the pump.
• Bleed the lubricant pressure off the system by opening a
dispensing valve into a container. Hold the valve open until
all flow from the system stops.
• Close the shut-off valve between the pump and reservoir on
standpipe installations (if present).
• Close the shut-off valve between the pump outlet and sup-
ply lines (if present).
• Slowly loosen the lubricant supply line at the pump out-
let. A very small volume of oil will leak from the threads.
If pressure is present, stop the loosening procedure and
repeat the steps above.
REPAIR
Repair is limited to the service parts listed on following pages.
In most cases, service is going to be the replacement of soft
seals in the pump. See illus. 5 and 6 for internal components
of the pump. Illus. 5 indicates the disassembly/re-assembly
order of the pump. Illus. 6 indicates how all components fit
together and the correct placement of seals.
Contact your nearest authorized Lincoln Service Dealer or
Lincoln Technical Services for assistance.
Disassembly Procedure
• Follow Pressure Relief Procedure, above to remove all
pressure from the pump and related system.
• Disconnect air and supply lines from the pump and remove
from reservoir.
• On pumps with long pump tubes, remove the pump tubes
from the pump inlet.
• Carefully secure the pump in a vise holding at the pump
base. Take care not to damage the pump base or other
components.
• Loosen Allen head cap screws, (item #1), and remove.
Remove fluid cylinder (item #2) and set aside O-ring (item
#3).
• Make sure that fluid plunger components, (items #4
thru #9) are securely attached to piston rod ass’y, (item
#18).
• Loosen Allen head cap screws (item #14). Make sure
that the screws and air cylinder are not under spring
tension before removal of screws. Pull air cylinder (item
#21) away from pump body (item #15) before screws are
completely removed to make sure cylinder is not under ten-
sion.
• Remove air cylinder (item #21) and remove air piston as-
sembly (item #19) from air cylinder. Use a rod through air
inlet hole to gently push piston from cylinder. [Air plunger,
(item #19) is a sealed unit. Internal seals in the air plunger
are not replaceable. If problems are suspected with the air
plunger, the entire plunger must be replaced as a unit.]
• Spring (item #16) is now retained by the fluid plunger
components, (items #4 thru #9), only. With assistance
from another person, push the piston rod assembly (item
#18) slightly into pump body to relieve tension from fluid
piston components, (items #4 thru #9). Hold piston rod with
wrench on flats provided, and remove the fluid piston nut
(item #4). Gently remove the spring tension by allowing the
plunger rod to pull out of the pump body (item #15).
• Once spring tension is removed, remaining components
may now be removed from the pump body. (Piston Rod As-
sembly, (item #18) is permanently assembled in two pieces
at the factory, do not attempt to disassemble any further.)
• Remove retaining ring (item #10) and washer (item #11).
The U-cup seal (item #12) may now be removed from the
pump body, taking care not to damage surfaces of seal
bore.
• Once all components are disassembled, clean with mineral
spirits or other suitable solvent. Replace all replaceable
seals and worn parts.
• Reassembly will be the reverse of the above procedure.
• NOTE: When installing U-Cup seal (item #12) special care
is required to place the seal in the bore correctly. The seal
lips must face the outlet end of the pump, as seen in
Illus. 6. Make sure that retaining ring (item #10) is properly
seated when reinstalled.
Contact your nearest authorized Lincoln Service Dealer or
Lincoln Technical Services for assistance.
When ordering replacement parts, order by part number and
description. The model number and series letter may also be
required.

Page Number - 8
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMP
Form 402002
Illustration #5

Page Number - 9
Form 402002
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMP
Illustration #6

Page Number - 10
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMP
Form 402002
SERVICE PARTS
PART NO ITEM DESCRIPTION QUAN
274095 1 1/4-28 X 3/4” SOC HD CAP SCREW 4
274079 2 FLUID CYLINDER 1
274107
3 O-RING, FLUID CYL. (NITRILE) 1
5 SEAL, PISTON (NITRILE) 1
8 O-RING, PISTON CHECK (NITRILE) 1
12 U-CUP, ROD SEAL (POLYURETHANE) 1
20 SEAL, AIR PISTON (POLYURETHANE) 2
274078 4 NUT, FLUID PISTON 1
274077 6 FLUID PISTON 1
274081 7 RETAINER, O-RING 1
274076 9 CHECK WASHER 1
274082 10 RING, RETAINING 1
48237 11 WASHER 1
272580 13 MUFFLER KIT 1
274084 14 3/8-16 X 1” SOC HD CAP SCREW 4
274067 15 PUMP BODY 1
274069 16 SPRING, PISTON RETURN 1
274075 17 RETAINER, SPRING 1
274072 18 PISTION ROD ASSY 1
274066 19 PISTON ASSY, AIR 1
20 SEAL, AIR PISTON (POLYURETHANE) 2
274070 21 CYLINDER, AIR 1
261170
22
SUCTION TUBE ASS’Y MODEL 4490 1
274085 SUCTION TUBE ASS’Y MODEL 4491 1
274087 SUCTION TUBE ASS’Y MODEL 4492 1
274219 23 COLLET 1
261103 24 BUNG BUSHING 1
261104 25 BUNG CAP 1
273035 26 COLLET WASHER 1

Page Number - 11
Form 402002
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMP
TROUBLESHOOTING
Conditions Possible cause Corrective action
The pump doesn’t operate. No inlet air pressure. Connect air supply.
The piston is stuck. Disassemble the pump inspect for damage,
relubricate. Replace if necessary.
Air pressure is too low. Check air pressure supply. The pressure
is to be higher than 20 Psig.
Broken return spring Replace if necessary.
The pump cycles but doesn’t Loss prime Repeat priming operation
deliver fluid. The container is out of Check that container has fluid.
liquid.
The ball check valve Disassemble check valve, remove ball,
is not functioning. clean and inspect ball seat area.
The pump still doesn’t operate. Contact an authorized service center.

Page Number - 12
MODELS 4490, 4491, 4492
3.5:1 AIR OPERATED PUMP
Form 402002
Declaration of Conformity as defined by Machinery Directive 98/37/EG Annex II A
This is to declare that the design of the Single Action 3.5:1 Air Operated Pumps (models 4490, 4491 & 4492) complies with the
provisions of Directive 98/37/EG
Applied Standards:
EN 292-1 Safety of Machinery - Basic Concepts, General Principles and Design - Part 1: Basic Terminology, Methodol-
ogy
EN 292-2 Safety of Machinery - Basic Concepts, General Principles and Design - Part 2: Technical Principles and
Specifications - Incorporates amendments 1 (1995) and 2 (1997)
EN 809 Pumps and Pump Units for Liquids - Common Safety Requirements
St. Louis, MO 04/28/05, Paul Conley, Chief Engineer
Americas:
One Lincoln Way
St. Louis, MO 63120-1578
USA
Phone [phone]
Fax [phone]
Europe/Africa:
Heinrich-Hertz-Str 2-8
D-69183 Walldorf
Germany
Phone [phone]
Fax [phone]
Asia/Pacific:
51 Changi Business Park
Central 2
#09-06 The Signature
Singapore 486066
Phone [phone]
Fax [phone]
© Copyright 2005
Printed in USA
Web site:
www.lincolnindustrial.com