Lincoln CENTRO-MATIC 84944 User manual

Page
Section - C8 - 248F
41A-68530-A99 Form 402829
March1999
CENTRO-MATIC®
Model 84944 Series C
Model 85461Series A
Hydraulically OperatedPump

Page Number - 2
CENTRO-MATIC® PUMP, MODELS 84944 & 85461
4.1A-68530-A98 Form 402829
SAFETY
Read and carefully observe these operating instructions
before unpacking and operating the pump! The pump must
be operated, maintained and repaired exclusively by persons
familiar with the operating instructions. Local safety
regulations regarding installation, operation and
maintenance must be followed.
Operate this pump only after safety instructions and this
service manual are fully understood.
This symbol identifies the potential for a hazardous situation.
If this warning is not followed, a serious injury could occur.
Please refer to the following service page for the Model
84961 pump for all other safety considerations:
84961 Hydraulic Pump - Section C8, Page 240 Series
85530 Controller - Section C8, Page 259 Series
PRODUCTSPECIFICATIONS
Pump Ratio: 16:1
Input Pressure 300 to 3000 PSI
(21 to 207 bar)
Input Flow 1.0 GPM (3.8 l/min)
Maximum Hydraulic Temp. 210° F (99° C)
Output Pressure 3500 PSI Maxiumum (241 bar)
Output Flow 11 in³/min (180 cc/min)
Ambient Temperature -40° to 135° F (-40° to 57° C)
Seals
Pump Polyurethane
Motor Buna-N
Vent Valve Viton
Hydraulic Filtration Required 10 Micron
Container Capacity 60 lbs.
Weight (84944) 68 lbs. (31 kg)
(85461) 78 lbs. (35 kg)
IMPORTANT NOTE: Maximum allowable hydraulic return line
pressure NOT TO EXCEED 30 PSI (2.07 bar) for proper
venting of SL-1 injectors (45 psi ( 3.1 bar) for SL-11).
DESCRIPTION
General Description
The Models 84944 and 85461 are pumping systems
designed to operate centralized lubrication systems which
utilize single line parallel grease metering components.
The pump is double acting, dispensing lubricant on both
the UP and DOWN strokes. These units are designed to be
used with SL-1, SL-11, SL-32, and SL-33 series injectors or
a combination of these. These units are designed for off
road equipment which utilizes 24 VDC power sources.
These units can be used in conjunction with the Models
85530 or 84015 Controller and Model 249605 Cycle Timer.
The difference between the two models is that the 85461 is
equiped with a follower and a low level indicator.
Appropriate Use
The pumps on these units are exclusively designed to
pump and dispense lubricants using hydraulic fluid
pressure only.
The maximum specification ratings should not be
exceeded.
Any other use not in accordance with instructions will
result in loss of claims for warranty and liability.
PUMPOPERATION
Operation with Model 85530 System Controller
When Model 85530 times out, it will initiate a lube cycle.
The hydraulic solenoid is energized to deliver hydraulic fluid
to the pump and to the vent valve. Pump begins dispensing
lubricant through injectors to the bearings.
When all bearings have received lubricant, pressure rises
in the system to actuate the pressure switch. When
pressure switch actuates, the control is reset to de-energize
the solenoid valve cutting off pressure to the pump and vent
valve. Pump stops, pressure vents and pressure switch
de-actuates. Control begins timing toward next lube event.
INSTALLINGTHEPUMP
Place the unit in the approximate location making sure that
grease and hydraulic connections are accessible. Mark
center locations of the six holes at the bottom of the reser-
voir. Then drill six 1/2” holes. The use of 7/16” bolts will
offer some flexibility in securing the reservoir to the equip-
ment.
Lubricant outlet of pump should be connected to system with
suitable hose capable of 3,500 PSI (241 bar) working
pressure.
Hydraulic supply line connection should be made with at
least 1/4” I. D. hose rated for maximum system hydraulic fluid
pressure.
TABLE OFCONTENTS Page
Safety...............................................................................2
Specifications...............................................................................2
Description...........................................................................2
Pump Operation........................................................................2
Installing the Pump...................................................................2
OptionalDevices...........................................................................3
Putting PumpintoOperation......................................................3
Maintentanceand Repair..............................................................3
Dimensions............................................................................6
RepairPartsList.........................................................................7
Troubleshooting............................................................8

Page Number - 3
CENTRO-MATIC® PUMP, MODELS 84944 & 85461
4.1A-68530-A98
Form 402829
OPTIONALDEVICES
Low Level Kit
Model 249608 Low Level Kit can be installed whenever
higher viscosity greases or lower temperatures are
encountered and when an external indicator of lubricant
level is desired. The kit is composed of a follower with
wiper attached to a level indicator gage located on the
cover of the reservoir.
PUTTINGPUMPINTOOPERATION
Filling Reservoir
To bulk fill the reservoir, remove the lower and upper pipe
plugs from the side of the reservoir. Attach the appropriate
bulk-filling pump to the lower inlet (3/4 NPT). Fill reservoir
until grease appears at the top 1/2 NPT high level port.
Remove the bulk-filling pump. Replace both pipe plugs.
To fill the reservoir using a five-gallon pail of lubricant, first
remove the six bolts that secure the lid. Remove the entire
assembly of lid, pump and vent valve. Using pipe wrench
or vice grips, remove the filler nipple extension attached
inside the reservoir at the 3/4 NPT inlet nipple. Insert
opened pail of lubricant and reattach lid and pump
assembly.
Note: If pail lubrication is to be used, then the optional wing
screws (60) should be used in place of the hex bolt (35).
When filling the reservoir, caution should be used as
extreme pressure can cause damage to the reservoir or
serious personal injury.
MAINTENANCE&REPAIR
General Maintenance
Good housekeeping will go a long way in keeping a
lubrication system running without problems for many
years of use.
Keep area around pump clean. Clean off filling area prior
to filling reservoir. Clean area around filler after filling as
lubricants will attract dirt.
Keep lubricants clean and free of dirt and debris.
When replacing grease pails be especially careful to
prevent any foreign matter from entering the grease pail or
contaminating the grease, as it adheres to the pump.
In Case of Trouble
(See Trouble Shooting Chart Page 7)
Use the Trouble Shooting Chart to determine where to
look if problems occur.
See the sections below for replacement and repair of
specific areas of the check valve, vent valve or safety
unloader valve.
Each part is identified with a number keyed to the
matching part on the illustrated views.
General recommendations of tools required are also
specified in each step.
Pay particular attention to the Warning statements to
prevent personal injury and possible damage to pump
components.
Outlet Check Service (See Illustration Page 5)
1. Turn off and disconnect the hydraulic supply to the pump
assembly.
2. Standard tools required are a bench mounted vice, a set of
open end wrenches ranging from 7/16 to 1-1/2, a large 24
adjustable wrench and a smaller 10 adjustable wrench.
3. Remove bolts and lockwashers (44 & 45).
4. Loosen union (12) and set vent valve assembly to the side.
5. Remove entire outlet check assembly (6) by loosening
adapter (8) from pump outlet.
6. Remove adapter (8) from bushing (20).
7. Remove outlet connector (11) from bushing (20).
8. Remove ball check seat (21) from outlet connector (24).
9. Inspect all check components (19, 20, 21, 23) for presence
of foreign material, scoring and or other damage, which
may cause internal leakage.
10. If foreign material is present, clean components and
reassemble, making sure to replace gaskets (18 & 22).
Reverse the above procedure to reassemble. Torque
check assembly to 100 ft.-lbs.
11. If check components appear to be scored or damaged
replace all components (19, 20, 21, 23) and gaskets (18
& 22) with new ones. Reverse the above procedure to
reassemble. Torque check assembly to 100 ft.-lbs.
Vent Valve Service (See Illustration Page 5)
1. Turn off and disconnect the hydraulic supply to the pump
assembly.
2. Standard tools required are a bench mounted vice, a set of
open end wrenches ranging from 7/16 to 1-1/2, a large 24
adjustable wrench and a smaller 10 adjustable wrench.
3. Remove delivery hose (15). Remove vent hoses (42 & 46).
4. Remove bolts and lockwashers (44 & 45).
5. Loosen union (12) and remove vent valve.
6. Hold base of vent valve in vice to remove nipple (11) and
elbow (13). Turn vent valve in vice so that vice jaws are
gripping flats machined on base of vent valve.
7. Remove cylinder (25). Remove piston and packing
assembly (26) from cylinder. If leakage was evident from
side of cylinder then replace packing.
8. Remove packing assembly (28). If grease leakage was
evident from side of cylinder, then replace packing
assembly.
9. Inspect needle (27) and valve seat (29). If foreign matter is
lodged and is keeping the needle from sealing in valve
seat, clean and inspect for damage. If seat appears
damaged by nicks, grooves or scouring it should be
replaced. Remove valve seat (29) from valve body (31) by
placing a 3/4 open end wrench onto the flats and
loosening the seat. The use of an adjustable wrench over

Page Number - 4
CENTRO-MATIC® PUMP, MODELS 84944 & 85461
4.1A-68530-A98 Form 402829
the open end wrench may be necessary due to the
accessibility of the seat.
10. Replace the valve seat (29) if damaged. Also be sure to
remove and replace the gasket (30) below the seat.
11. Reassembly is the reverse of the above procedure.
Needle (27) and cylinder (25) inside diameter should
be coated with oil or grease to assist in assembly.
12. Upon reassembly tighten valve seat (29) into body (31)
using 25 ft.-lbs. Tighten air cylinder (25) onto valve body
(31) using 100 ft-lbs.
Follower (see Illustration Page 5)
If follower wiper appears to be damaged or does not wipe the
sides of the container effectively service may be necessary.
1. Disconnect hydraulic supply from pump.
2. Remove the eight bolts (35) and lock washers (36) which
attach the cover to the reservoir.
3. Lift the entire pump, vent valve and cover assembly out of
the reservoir.
4. Unscrew the low level indicator (55) from the follower
plate (56).
5. Now remove the entire follower assembly from the pump
tube. After removing the follower assembly from the pump
tube wipe off the excess grease which will allow clean
access to the eight carriage bolts that must be removed.
6. Loosen and remove the eight nuts (5) on top of the
follower.
7. Remove the follower weight (56) and the wiper (1).
Replace the wiper with a new one.
8. Reassemble in the reverse of the above procedure
making sure that the long carriage bolts are staggered with
the small ones and that they extend below the follower per
the dimension shown.
Low Level Indicator (see Illustration Page 6)
If the indicator pin appears to drop prematurely or water is
noticeable on top of the follower then the indicator seal (54)
may be damaged.
1. Remove the eight bolts (35) and lockwashers (36) which
hold the cover on to the reservoir.
2. Inspect the reservoir seal (47) for damage. If damage is
apparent then replace the seal.
3. Remove the entire pump, vent valve and follower assembly
from the reservoir.
4. Remove the retaining ring (52) from the indicator rod
assembly (55).
5. Hold the indicator plug (57) with a wrench while removing
the indicator nut (53).
6. Remove and replace the O-ring (54).
7. Reassemble in the reverse of the above procedure.
Torque the indicator nut (53) to 20 ft.-lbs.
Safety Unloader Valve (see Illustration Page 6)
The Safety Unloader (10) is set to open at 3,750 to 4,250 PSI
lubricant pressure. If pressure Switch fails to operate and
shut off hydraulic supply to pump, the Safety Unloader will
open at approximately 4,000 PSI to relieve lubricant supply
line pressure.
Safety unloader valve (10) is not serviceable and should be
replaced if malfunction is apparent. Upon reassembly,
tighten to 10 ft-lbs.
Bare Pump Assembly (See Illustration Page 5)
Please refer to the service page included for the bare pump
assembly (43).

Page Number - 5
CENTRO-MATIC® PUMP, MODELS 84944 & 85461
4.1A-68530-A98
Form 402829
18 19
20 21 2223 24
1/4” NPTF 25
26
28 27
29
31
30
3/4 NPTF 3/4 NPTF
156
3
2
5
4
34
43
42
9
13
14
46
15
See Section C-C,
page 6
3/4 NPTF Male
Conect to lube
system.
16
17
14
41 40
39
49
38
37
36 (8 Req’d)
35 (8 Req’d)
32, 34 (4 pcs install
from bottom)
33
51
1 5/8
(41 mm)
Outlet Check Assembly (6)
Vent ValveAssembly (9)
FollowerAssembly (41)
Model 85461
61

Page Number - 6
CENTRO-MATIC® PUMP, MODELS 84944 & 85461
4.1A-68530-A98 Form 402829
10
12
11
6
8
719.5
(495 mm)
BB
C
C
15
(381 mm)
35
(889 mm)
Section B-B
45
(2 Req’d) 44
(2 Req’d)
51 (Ref) 46 (Ref)
47
48
50
49
52
53
55
56 (Ref)
57
59
33 (Ref) 54
58
Section C-C
View A-A
AA

Page Number - 7
CENTRO-MATIC® PUMP, MODELS 84944 & 85461
4.1A-68530-A98
Form 402829
1 1 Wiper (Nitrile) *249331
2 4 Carriage Bolt (Short) 249332
3 1 Follower Guide Plate 249333
4 4 Carriage Bolt - Long 249763
5 12 Nut 51304
6 1 Outlet Check Ass’y 81938
7 1 Vent Fitting 249354
8 1 Adapter 12213
9 1 Vent ValveAssembly 84980
10 1 Safety Unloader Ass’y *90942
11 1 Nipple 14727
12 1 Union 66645
13 1 Elbow 10160
14 2 Nipple 11197
15 1 Delivery Hose 236607
16 1 Adapter Union 66883
17 1 Bushing 12018
18 1 Gasket *31029
19 1 Pump Check Disc Ass’y +*80206
20 1 Outlet Check Bushing +*90204
21 1 Ball Check Seat *10313
22 1 Gasket *31001
23 1 Steel ball (3/8” Dia.) *66001
24 1 Outlet Connector +90860
25 1 Cylinder 241807
26 1 Piston Ass’y 244673
27 1 Needle *14722
28 1 Viton Packing Ass’y +*239330
29 1 Valve Seat *14723
30 1 Check Seat Gasket *31047
Item Qty. Description Model
No. 85461/84944
SERVICEPARTS
* Suggested service replacement components.
+ Sold as an assembly. Individual parts not available.
31 1 Valve Body 239336
32 4 Screw 50169
33 1 Cover 241085
34 12 Lock Washer 66186
35 8 Bolt 50015
36 8 Lockwasher 66220
37 1 Pipe Plug 67117
38 1 Gasket 33152
39 1 Container Ass’y 242765
40 1 Extension Tube 249356
41 1 Follower Ass’y 249330
42 1 Hose Ass’y 241963
43 1 Hydraulic Pump 84961
44 2 Bolt 50016
45 2 Lockwasher 66246
46 1 Volume Hose 236874
47 1 Gasket *249355
48 1 Nut 12538
49 1 Vent Pipe 67420
50 1 Gasket *31010
51 1 Elbow 249533
52 1 Retaining Ring *68888
53 1 Indicator Nut 16352
54 1 O-Ring *249532
55 1 Cable Assembly 249762
56 1 Follower Weight 249334
57 1 Indicator Plug 249357
58 1 Washer 48548
59 1 Indicator Bracket 361020
60 8 Wing Bolts - not shown 252727
61 1 Pipe Plug 67224
Item Qty. Description Model
No. 85461/84944

Page Number - 8
CENTRO-MATIC® PUMP, MODELS 84944 & 85461
4.1A-68530-A98 Form 402829
Lincoln GmbH
69190 Walldorf
Heinrich-Hertz Strasse 2-8
([phone]
Lincoln Industrial
25 International Business Park
#01-68 German Centre
Singapore 609916
([phone]
Lincoln Industrial
One Lincoln Way
St. Louis, MO 63120-1578
([phone]
www.lincolnindustrial.com
Condition Possible Cause Corrective Action
Pump does not operate. No hydraulic pressure to pump. Turn on or connect hydraulic supply to pump.
Hydraulic motor or pump tube malfunction. Refer to pump service page.
Pump Runs excessively. Pump tube malfunction. Refer to pump service page.
Outlet check damage or contamination. Repair check or remove contamination.
Vent valve damage or contamination. Repair vent valve or remove contamination.
System component leaking. Repair leaks.
Injector bypassing. Repair injectors.
Lubricant leaking from weep Pump tube malfunction. Refer to pump service page.
hole of pump outlet casting.
Lubricant leaking from safety Pressure of system set too high. Adjust pressure switch setting.
unloader valve. Safety unloader damaged or contaminated. Replace safety unloader.
Hydraulic fluid leaking from Vent valve piston seal damaged. Replace piston and seal assembly.
weep hole in vent valve.
Lubricant leaking from weep Vent valve lubricant seal damaged. Replace lubricant seal.
hole in vent valve.
MODEL 85461 & 84944 TROUBLESHOOTING