Lincoln industrial A Series User manual

Section
Page
- A50
- 84D
AUG - 98
Copyright 1998
Printed in U.S.A.
One Lincoln Way
St. Louis, Missouri 63120-1578
[phone]
FORM 402676
Models 94804, 94806, 94808, 94810
41/4, 6, 8 & 10 IN. AIRMOTORS
WITH AIR BRAKE
Series "A"
OWNERS MANUAL
IT IS THE RESPONSIBILITY OF THE OWNER AND/OR OPERATOR TO PROPERLY USE AND MAINTAIN THIS
EQUIPMENT. CAREFULLY READ AND UNDERSTAND THE INSTRUCTIONS AND WARNINGS IN THIS MANUAL
BEFORE OPERATING THIS EQUIPMENT.
If the operator is not fluent in English, the instructions and warnings shall be read and discussed in the operator's native language, making sure
the operator comprehends the contents.
This equipment complies with OSHA Standards where applicable.
This manual contains IMPORTANT WARNINGS and INSTRUCTIONS. READ AND RETAIN FOR REFERENCE.

Page 2 Form 402676
NOTE:
Use only with 6 in.(152 mm) stroke
Pump Tubes. DO NOT OPERATE
with air contaminated with materials
not compatible with BUNA-N seals.
MODEL CYLINDER DIAMETER
IN. (MM)
EFFECTIVE
PISTON
AREA
IN2 (CM2)
OPERATING
PRESSURE
RANGE
PSIG (BAR)
OPERATING
TEMP.
RANGE
°C (°F)
MIN. I.D.
OF AIR
SUPPLY
IN. (MM)
AIR
INLET
AIR CONS.
AT 75 CPM
@ 100 PSIG
SCFM
94810
94808
94806
94804
10 (254)
8 (203)
6 (152)
4-1/4 (108)
78 (506)
50 (324)
28 (182)
14 (92)
30-100 (2-7)
30-100 (2-7)
30-100 (2-7)
30-200 (2-14)
-30 - +200
(-34 - +93)
3/4 (20)
3/4 (20)
1/2 (12)
1/2 (12)
3/4" NPTF
3/4" NPTF
3/4" NPTF
1/2" NPTF
245
160
105
65
MODEL MAX. RECOM.
SPEED
CPM
STROKE
LENGTH
IN. (MM) WEIGHT LB. (KG) SEALS MATERIAL DIM. A IN. (MM) DIM. B IN. (MM) DIM. C IN. (MM)
94810
94808
94806
94804 75 6 (152)
59.5 (27)
46.5 (21)
33 (15)
22 (10)
BUNA-N
and
*TEFLON
13-1/4 (337)
11-1/4 (286)
7-1/2 (191)
13-1/8 (333)
11-1/16 (280)
9-1/4 (197)
7-1/4 (152)
22-3/4 (577)
22-3/4 (577)
22-3/4 (577)
23-5/8 (599)
*TEFLON®Seals used with Power Valve Spool (Item 13) and Relay Valve (Item 17).
SPECIFICATIONS

Form 402676 Page 3
14. Cylinder Tube Soft Parts Kit
(Includes "O"-rings, piston seal, etc.)
P/N 84789 (10" Airmotor)
P/N 84791 (8" Airmotor)
P/N 84792 (6" Airmotor)
P/N 84793 (4-1/4" Airmotor)
17. Power Valve Subassembly
P/N 244800 (10" Airmotor)
P/N 244804 (8" Airmotor)
P/N 244806 (6" Airmotor)
P/N 244808 (4-1/4" Airmotor)
IMPORTANT: When replacing soft parts, replace all parts included in the soft parts kit.
SERVICE ASSEMBLIES & KITS
To reduce down-time and take advantage of the modular design of the airmotor, Lincoln recommends using the following Service
Assemblies for repair of the airmotor. After removal, the faulty assembly can then be repaired using the corresponding Soft Parts Kit.

Page 4 Form 402676
NOTE: Refer to Page 3 for service assemblies & kits.

Form 402676 Page 5
BEFORE CONNECTING
AIRMOTOR TO AIR LINE
LINCOLN SERIES III AIRMOTORS are fully
pneumatic and require a minimum specified
size of air supply hose for proper operation.
Check specification for minimum I.D. of the
air supply hose and select corresponding
sizes of air controls and accessories for non-
restrictive air flow. Lincoln filter, regulator
with gauge and lubricators are available as
combination units (FRL).
For 3/8" air line - Model 83387-6
For 1/2" air line - Model 83387-8
For 3/4" air line - Model 83387-12
If quick disconnect coupling should be used,
install supplied coupler to insure proper
airmotor operation.
NOTE: Whenever flammable materials are
pumped, ground Airmotor according to Local
Codes.
OPERATING PRECAUTIONS
Use Lincoln replacement parts to assure
compatible pressure rating.
Heed ALL warnings.
DO NOT OPERATE Airmotor in excess of
recommended pressure range.
Disconnect air line and relieve (vent) pressure
when Airmotor sits idle for long periods of time
and before servicing.
ATTACHING AIRMOTOR TO
PUMPTUBE
1. Tightly attach the tie rods(Item 41) to the
Airmotor lower casting. Use short
threaded end of tie rods.
2. Mount Airmotor on top of pump tube
outlet and tightly connect pump tube
coupling nut to Airmotor Piston Rod
(Item 5).
3. Hand tighten tie rods to the pump tube
with four nuts (Item 42) supplied with
Airmotor.
4. Connect air supply and slowly cycle
pump several times using only enough air
pressure to operate pump without stalling.
5. STOP pump on "UP" stroke and tighten
four nuts to securely fasten Airmotor to
pump tube.
SERVICE AND DISASSEMBLY
PROCEDURE
TOOLS REQUIRED
1. 7/64 (.109) Hex Wrench
2. 5/32 (.156) Hex Wrench
3. 3/16 (.189) Hex Wrench
4. 1/8 (.125) Hex Wrench
5. 3/4 (.750) Open End Wrench
(for 6" Airmotor)
6. 15/16" (.937) Open End Wrench
(for 8" Airmotor)
7. 1/2" (.500) Open End Wrench
(for 4-1/4" Airmotor)
8. 1-1/8" (1.125) Open End Wrench
(for 10" Airmotor)
9. 1/2" (.500) Box End Wrench
10. Pliers
11. 0-100 in. lb. Torque Wrench
The modular design of the Airmotor and
accessibility of vital operation parts make
service available without taking Airmotor out of
line or without complete disassembly.
Power Valve
1. Remove four screws (Items 27 & 34) with
3/16" hex wrench (2 on each side).
2. Remove End Caps (Items 10 & 14).
3. Push out Valve Spool (Item 13).
4. Remove Spool Bumpers (Item 9)
(One from each end).
5. Remove "O" Ring (Item 11)(One from
each end of valve body).
6. Remove four Screws (Item 37) with 3/16"
hex wrench and lift valve body (Item 12).
7. Remove Gasket (Item 15) to complete
valve disassembly.
8. To REASSEMBLE, REVERSE procedure.
Air Brake®Subassembly
1. Remove four Screws (Item 23)(two on
each end) with 3/16" hex wrench and pull
out Air Brake®Subassembly.
2. Remove two Screws (Item 39), with 7/64"
hex wrench and lift out Valve Body (Item
17).
3. Remove four Screws (Item 32)(two on
each side of Air Brake®) with 1/8" hex
wrench and remove Signal Valve Caps
(Item 31) and Air Signal Valves (Item 20).
4. Remove four Screws (Item 24) with 3/16"
hex wrench and lift off Upper Body (Item
50) and Upper Gasket (Item 51).
5. Remove Gasket Plate (Item 52) and
Lower Gasket (Item 53).
6. Remove Air Filter (Item 40) in two
locations.
7. Remove Pump Sleeve (Item 56) and
Piston (Item 55).
8. Remove Diaphragm Seal and Retainer,
Diaphragm, Spring and Stop Valve Assy.
(Items 61, 57, 58, 59 & 60).
9. Remove cover from Bleed Assembly
(Item 67) and remove lock screw. Using
1/2" box end wrench, remove bleed valve
bolt and remaining parts.
10. Remove Trip Indicator (Item 48).
11. To REASSEMBLE, REVERSE
procedure, insuring that:
a. Upper and Lower Gaskets (Items 51 &
53) are well oiled with 10 wt. motor oil.
b. Assembly Screws (Items 23 & 24) are
torqued to 65 to 70 in. lbs.
Cylinder Tube and Muffler
1. Remove Air Brake®Subassembly (See
previous instructions).
2. Remove two Screws (Item 30) with 3/16"
hex wrench and pull off Mufler (Item 29).
3. Remove Gasket (Items 28).
4. Remove four Nuts (Item 26) with open end
wrench.
5. Lift upward and remove Upper Casting
(Item 8).
6. Remove four Tie Rods (Item 25).
7. Remove Air Tube (Item 7).
8. Lift upward and remove Cylinder Tube
(Item 6).
9. Remove Piston and Piston Rod (Item 5).
10. Remove four Connecting Rods (Item 41)
with open end wrench.
11. To REASSEMBLE, REVERSE
procedure.
NOTE: Align two holes on the the Cylinder Tube (Item 6)
with two holes on the Air Brake®Subassembly before
tightening Tie Rods (Item 25) so that proper seal with "O"-
rings is acheived.

Page 6 Form 402676
Item No.Description Qty. Model 94810
(10" D ia.) Model 94808 (8" D ia.) Model 94806 (6" D ia.) Model 94804 (4-1/4 " D ia.)
1 "U" Cup (Buna-N) 1 (Note #12) (Note#1) (Note #2) (Note #3)
2 Rod Bearing 1 247296 241732 241732 241733
3 Seal, Cylinder (Buna-N) 2 (Note #12) (Note #1) (Note #2) (Note #3)
4 "O"-ring (Buna-N) 2 (Note #12) (Note #1) (Note #2) (Note #3)
5 Piston Rod Assembly 1 247449 241740 241741 241742
6 Cylinder Tube 1 247448 241744 241745 241746
7 Air Tube 1 247336 241748 241748 241749
8 Upper Casting 1 247304 241750 241751 241752
9 Bumper, Valve 2 (Note #5) (Note #5) (Note #5) (Note #5)
10 Cap, Valve 1 241755 241755 241755 241755
11 "O"-ring (Buna-N) 2 (Note #5) (Note #5) (Note #5) (Note #5)
12 Body, Valve 1 (Note #13) (Note #13) (Note #13) (Note #13)
13 Spool, Valve 1 (Note#13) (Note #13) (Note #13) (Note #13)
14 Cap, Valve 1 247302 241759 241760 241761
15 Gasket 1 (Note #5) (Note #5) (Note #5) (Note #5)
16 "O"-ring (Buna-N) 2 (Note #5) (Note #5) (Note #5) (Note #5)
17 Relay Valve 1 242787 242787 242787 242787
18 "O"-ring (Buna-N) 3 (Note #6) (Note #6) (Note #6) (Note #6)
19 "O"-ring (Buna-N) 1 (Note #6) (Note #6) (Note #6) (Note #6)
20 Air Signal Valve 2 241768 241768 241768 241768
21 "O"-ring, Piston (Buna-N) 1 (Note #12) (Note #1) (Note #2) ------
22 Lower Casting 1 247303 241773 241774 241775
23 Screw (1/4-20 x 1-1/2") 4 50051 50051 50051 50051
24 Screw (1/4-20 x 7/8") 4 50521 50850 50850 50850
25 Tie Rod 4 247295 241766 241779 241767
26 Nut 4 247298 51018 51007 51001
27 Screw 2 244995 244995 244995 244995
28 Gasket 1 (Note #4) (Note #4) (Note #4) (Note #4)
29 Muffler Body 1 241021 241021 241021 241021
30 Screw (1/4-20 x 1-1/2") 2 50051 50051 50051 50051
31 Signal Valve Cap 2 (Note #8) (Note #8) (Note #8) (Note #8)
32 Screw 4 (Note #8) (Note #8) (Note #8) (Note #8)
33 S eal, P iston 2 ------ ------ ------ (Note #3)
34 Screw 2 247299 241783 241783 244994
35 "O"-ring (Buna-N) 2 (Note #6) (Note #6) (Note #6) (Note #6)
36 Adapter 1 ------ ------ ------ 241789
37 Screw (1/4-20 x 2-1/4") 4 244975 244975 244975 244975
38 Coupler 1 662012 655012 655012 655008
39 Screw 2 50816 50816 50816 50816
40 Air Filter 2 (Note #7) (Note #7) (Note #7) (Note #7)
41 Tie Rod 4 241023 241023 241023 241023
42 Nut (1/2-20) 4 236203 236203 236203 236203
43 Muffler Element 1 (Note #4) (Note #4) (Note #4) (Note #4)
44 Nipple 1 660112 653112 653112 653112
45 End Element 1 (Note #4) (Note #4) (Note #4) (Note #4)
46 Muffler Plate 1 241027 241027 241027 241027
47 Screw,Self Tapping (10-32) 2 66962 66962 66962 66962
48 Trip Indicator 1 243852 243852 243852 243852
49 "O"-ring (Buna-N) 4 (Note #6) (Note #6) (Note #6) (Note #6)
50 Upper Body 1 243855 243855 243855 243855
51 Upper Gasket (Nitrile) 1 (Note #7) (Note #7) (Note #7) (Note #7)
52 Gasket Plate 1 (Note #9) (Note #9) (Note #9) (Note #9)
53 Lower Gasket (Nitrile) 1 (Note #7) (Note #7) (Note #7) (Note #7)
54 Lower Body 1 N/A N/A N/A N/A
55 Piston 1 (Note #10) (Note #10) (Note #10) (Note #10)
56 Pump Sleeve 1 (Note #10) (Note #10) (Note #10) (Note #10)
57 Diaphragm Retainer 1 (Note #11) (Note #11) (Note #11) (Note #11)
58 Diaphragm 1 (Note #11) (Note #11) (Note #11) (Note #11)
59 Spring 1 (Note #11) (Note #11) (Note #11) (Note #11)
60 Stop Valve Assembly 1 (Note #11) (Note #11) (Note #11) (Note #11)
61 Diaphragm Seal 1 (Note #11) (Note #11) (Note #11) (Note #11)
62 "O"-ring (Buna-N) 1 (Note #10) (Note #10) (Note #10) (Note #10)
63 Umbrella Seal(Nitrile) 2 (Note #9 &10) (Note #9 & 10) (Note #9 & 10) (Note #9 & 10)
64 Quad Ring (Buna-N) 1 (Note #10) (Note #10) (Note #10) (Note #10)
65 Quad Ring (Buna-N) 1 (Note #10) (Note #10) (Note #10) (Note #10)
66 Spring Pin 2 243614 243614 243614 243614
67 Bleed Assembly 1 243854 243854 243854 243854
PARTS LIST
NOTES: 1. Included in 84791 Cylinder Tube Soft Parts Kit for
Model 94808 (8" Airmotor).
2. Included in 84792 Cylinder Tube Soft Parts Kit for
Model 94806 (6" Airmotor).
3. Included in 84793 Cylinder Tube Soft Parts Kit for
Model 94804 (4-1/4" Airmotor).
4. Included in 84939 Muffler Element Kit.
5. Included in 84968 Soft Parts Kit for Power Valve
Subassembly.
6. Included in 84967 Soft Parts Kit for Air Brake®
Subassembly.
7. Included in 244089 Gasket and Air Filter Kit.
8. Included in 243853 Signal Valve Cap Kit.
9. Included in 244093 Gasket Plate with Check
Valves.
10. Included in 244092 Air Pump Repair Kit.
11. Included in 244091 Stop Valve Repair Kit.
12. Included in 84789 Cylinder Tube Soft Parts Kit for
Model 94810 (10" Airmotor).
13. Included in 244802 Power Valve Spool & Body.
N/A - Not Available

Form 402676 Page 7
MODELS 94806, 94808, & 94810

Page 8 Form 402676
RETAIN THIS INFORMATION FOR FUTURE REFERENCE
When ordering replacement parts, list: Part Number, Description, Model Number and Series Letter.
LINCOLN provides a Distributor Network that stocks equipment and replacement parts.
SETTING THE AIR BRAKE®
TRIP SPEED
1. Determine the maximum speed the
Airmotor will need to run.
2. Add 15 cycles per minute to this
maximum required speed.
3. Loosen the lock screw.
4. Rotate the bleed knob to the correct
setting as follows:
Maximum
Airmotor Bleed Knob
Speed Setting
0-20 cycles/min. Low
20-50 cycles/min. Medium
50-75 cycles/min. High
5. Turn lock screw until it contacts spring
washer, then tighten additional 1/2" turn.
6. Test unit in normal use to insure setting is
not too low. If Air Brake®stops Airmotor
during normal operation, increase the
setting.
NOTE: Air Brake® is diabled when
bleed knob is set on the run
setting.
AIR BRAKE®RESETTING
INSTRUCTIONS
If the Airmotor runs faster than the preset
speed, the Air Brake®will stop the airmotor with
the pump plunger in the down position. The
Trip Indicator piston extends to indicate that
the Air Brake®has been triggered and is
preventing Airmotor operation.
To reset the Air Brake®:
1. Shut off air supply to Airmotor.
2. Press flush reset button with a screwdriver
(located on right side of Relay Valve - Item
17) until Air Brake® shifts and indicator
button retracts.
3. Wait two full minutes to insure all
residual pressure vents off.
4. Turn on air supply. Airmotor will now
restart.
Problem Possible Cause Solution
Airmotor does not operate, air escaping
from exhaust. Restricted or inadequate air supply. Check air supply and adjust to minimum recommended level. Check air supply hose
diameter and change it to minimum
recommended size (see specifications).
Check size of FRL and quick disconnect
coupling. Replace if too small or restricted.
Erratic or accelerated operation with short
stroking. Dirty or damaged Relay Valve (Item 17) or Air Signal Valve (Item 20). Check valves and clean ifnecessary. Replace any damaged or worn parts.
Air Brake "trips" off even though airmotor
is running below set trip speed. (Runs
three strokes or more before stopping.)
Bleed groove clogged in Bleed Assembly
(Item 67). Remove bleed assembly and check bleed groove for foreign matter. if found,
disassemble entire Air Brake for cleaning
and replace air line filter.
Air Brake "trips" very quickly after
airmotor is started (within 3 strokes), even
though airmotor is running below set trip
speed.
Leaking Diaphragm (Item 58).
Leaking Upper Gasket (Item 51).
Upper piston Quad Ring (Item 64) is
leaking.
Bleed Hole (A) in clear washer not aligned
with Bleed Hole (B) in bleed base.
Replace diaphragm.
Replace Upper and Lower Gaskets (Items
51 & 53).
Replace quad ring.
Align Tab (C) of clear washer to Slot (D) in
bleed base. (See illustration 9 in Service
Assemblies and Kits.)
Air Brake "trips" at proper speed
(indicated by the sound of air surging into
diaphragm chamber), but airmotor does
not stop.
Stop valve vent hole in Lower Body (Item
54) is clogged. (See Detail A, page 4.)
Stop valve (Item 60) is damaged.
Unclog vent hole in lower body.
Check stop valve and replace if worn or
damaged.
Air Brake will not trip even though
airmotor
has been running above the trip speed for
more than 1 minute.
Discharge Umbrella Seal (Item 63) is not
closing properly.
Diaphragm (Item 58) is not properly
installed, or is leaking due to damage.
Leaking Upper Gasket (Item 51) or Lower
Gasket (Item 53).
Stuck metering Pump Piston (Item 55).
Inlet Air Filter (Item 40) is completely or
partially clogged.
Inspect and replace both umbrella seals if
damaged.
Reinstall diaphragm properly or replace if
damaged.
Disassemble Air Brake and re-assemble
with new gaskets.
Increase air pressure to 100 PSIand try
again. If this fails, replace piston and pump
sleeve, including all rubber parts (Items 55,
56, 62, 64 & 65).
Clean or replace inlet air filter.
TROUBLESHOOTING