SKF Lincoln B Series Manuale di istruzioni

User and maintenance instructions

Models , , , , series “B”

 /, ,  and  in

Air motors with air brake

Date of issue January 2018

Form number 404239

Version 2

Contents

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Explanation of signal words for safety . . 

Dimensions . . . . . . . . . . . . . . . . . . . . . . . 

Speciﬁcations . . . . . . . . . . . . . . . . . . . . . 

Before connecting air motor to

air line. . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Operating precautions . . . . . . . . . . . . . 6

Attach air motor to pump tube . . . . . . 6

Service and disassembly procedure . . 6

Power valve . . . . . . . . . . . . . . . . . . . . . . 6

Air brake assembly . . . . . . . . . . . . . . . . 7

Labyrinth sub-assembly

disassembly procedure. . . . . . . . . . . . . 7

Labyrinth sub-assembly

reassembly procedure . . . . . . . . . . . . . 8

Cylinder tube and mufﬂer . . . . . . . . . . 8

Setting air brake trip speed. . . . . . . . . 9

Air brake operation. . . . . . . . . . . . . . . . 9

Setting air brake trip speed. . . . . . . . . 9

Speed settings . . . . . . . . . . . . . . . . . . . . 

Cavitation . . . . . . . . . . . . . . . . . . . . . . . . 

Broken hose or ﬁtting . . . . . . . . . . . . . . . 

Increase in air pressure. . . . . . . . . . . . . . 

Increase in demand . . . . . . . . . . . . . . . . 

Resetting air brake after tripping . . . . . . 

Exploded views . . . . . . . . . . . . . . . . . . . 11

Service parts list . . . . . . . . . . . . . . . . . . 16

Troubleshooting . . . . . . . . . . . . . . . . . . 19

Warranty . . . . . . . . . . . . . . . . . . . . . . . . 20

Safety

Read and carefully observe operating

instructions before unpacking and operating

air motor. Air motor must be operated,

maintained and repaired exclusively by

persons familiar with operating instructions.

Local safety regulations regarding

installation, operation and maintenance

must be followed.

Operate pump only after safety

instructions and this service manual are fully

understood.

Explanation of signal

words for safety

NOTE

Emphasizes useful hints and recommenda-

tions as well as information for efﬁcient and

trouble-free operation.

CAUTION

Indicates dangerous situation that can lead to

light personal injury or property damage if

precautionary measures are ignored.

WARNING

Indicates dangerous situation that can lead to

severe or light personal injury if precaution-

ary measures are ignored.

DANGER

Indicates dangerous situation that can lead to

death or severe personal injury if precaution-

ary measures are ignored.

NOTE

Model shown with optional tamper

resistant kit installed over air brake

selector knob.



Speciﬁcations

Model

Cylinder

diameter

Effective

piston area

Operating pressure

range

Operating

temperature range

Minimum I.D.

of air supply

Air

Inlet

Air cons. at

 psi ( bar)

  in (254 mm)  in( cm)– psi (3,4–7 bar) – to  °F

(–34 to 66 °C)

3/4in (20 mm) 3/4in NPTF . scf/cycle

(103 L(N)/cycle)

  in ( mm)  in( cm)– psi (3,4–7 bar) – to  °F

(–34 to 66 °C)

3/4in (20 mm) 3/4in NPTF . scf/cycle

(75 L(N)/cycle)

  in ( mm)  in( cm)– psi (2,7–7 bar) – to  °F

(–34 to 66 °C)

1/2in (12 mm) 3/4in NPTF . scf/cycle

(46 L(N)/cycle)

  1/4in

( mm)

 in( cm)– psi (2,7–14 bar) – to  °F

(–34 to 66 °C)

1/2in (12 mm) 1/2in NPTF . scf/cycle

(32 L(N)/cycle)

Model

Maximum

recomended speed

Effective

piston area

Weight

Seals

material

Dimension “A”

Dimension “B”

Dimension “C”

  cpm )  in (152 mm)  lbs. (28,1 kg) Buna-N and

Teﬂon )

 1/4in

(337 mm)

 1/16 in

(332 mm)

 3/4in

(577 mm)

  cpm )  in (152 mm)  lbs. (21,2 kg) Buna-N and

Teﬂon )

 1/4in

(286 mm)

 in

(279 mm)

 3/4in

(577 mm)

  cpm )  in (152 mm)  lbs. (15,5 kg) Buna-N and

Teﬂon )

 1/4in

(235 mm)

 11/16 in

(271 mm)

 3/4in

(577 mm)

  cpm )  in (152 mm)  lbs. (11,7 kg) Buna-N and

Teﬂon )

 1/2in

(191 mm)

 11/16 in

(221 mm)

 5/8in

(599 mm)

/ -20

4 in

(101 mm)

4 in

(101 mm)

WARNING

Do not exceed stated maximum working

pressure of air motor or lowest rated

component in your system.

Do not alter or modify any part of

equipment.

Do not operate equipment with combus-

tible gas.

Do not attempt to repair or disassemble

equipment while system is pressurized.

Tighten all ﬂuid connections securely

before using equipment.

Always read and follow ﬂuid

manufacturer’s recommendations

regarding ﬂuid compatibility, and use of pro-

tective clothing and equipment.

Check all equipment regularly and

repair or replace worn or damaged parts

immediately.

Failure to heed warnings including misuse,

over pressurizing, modifying parts, using

incompatible chemicals and ﬂuids, or using

worn or damaged parts, may result in seri-

ous personal injury and/or damage to equip-

ment, ﬁre, explosion, or property damage.

) Air inlet.

Fig. 1

Dimensions

) . cpm with air brake engaged.

) Teﬂon seals used with power valve spool (13) and relay valve (17).

NOTE

Do not operate with air contaminated with

materials that are not compatible with

Buna-N seals. Use only with

 in (152 mm) stroke pump tubes.



Fig. 8

Air pump repair kit (92)

Service assemblies

and kits

Fig. 2

Air brake subassembly 85317

Fig. 3

Relay valve (17)

Fig. 4

Signal valve cap kit (31)

Fig. 5

Air signal valve (20)

Fig. 6

Trip indicator (48)

Fig. 7

Stop valve repait kit (91)

Fig. 9

Bleed assembly (67)

Fig. IPB1

Gasket and air ﬁlter (89) and gasket plate

and check valves (90)

NOTE

Air brake assembly does not ﬁt 

 in (76 mm) series III air motor.

NOTE

Soft parts kit  available for repair of air

brake subassembly. Refer to page 16 for

details.



NOTE

When replacing soft parts, replace all parts

included in soft parts kit.

Fig. 10

Mufﬂer with gasket 242788

Fig. 11

Power valve subassembly 244800,

244804, 244806 and 244808

Fig. 12

Power valve spool and body 244802

NOTE

Mufﬂer element kit  available for repair

of mufﬂer (includes element, felts and

gasket).

NOTE

Cylinder tube soft parts kit 

( in airmotor),  ( in airmotor), 

( in airmotor), or  ( 1/4in airmotor).

NOTE

Soft parts kit  available for repair of

power valve subassembly.



Before connecting air

motor to air line

Lincoln series III air motors are fully

pneumatic and require minimum speciﬁed

size of air supply hose for proper operation.

Check speciﬁcations for minimum ID of air

supply hose, corresponding sizes of air

controls and accessories that allow

nonrestrictive air ﬂow. Lincoln ﬁlter,

regulator with gauge and lubricators are

available as combination units (FRL).

It is recommended to use a  micron

minimum pneumatic ﬁlter and pressure

regulator with this system.

Special lubricant is used in assembly of air

motors. It is not recommended to lubricate

system after it has been installed. New

lubricant will wash away factory lubricant

and may result in air motor failing. Added

lubrication could also result in critical small

pneumatic paths being blocked resulting in

malfunction.

For 1/2in (13 mm) air line -

Model -

For 3/4in (19 mm) air line -

Model -

If quick disconnect coupling should be

used, install supplied coupler to ensure

proper air motor operation.

Operating precautions

Use Lincoln replacement parts to assure

compatible pressure rating.

Heed all warnings.

Do not operate air motor in excess of

recommended pressure range.

Disconnect air line and relieve (vent)

pressure before servicing and when idling air

motor for long periods of time.

Service and

disassembly

procedure

Attach air motor to

pump tube

1 Tightly attach tie rods (41) to air motor

lower casting. Use short threaded end of

tie rods.

2 Mount air motor to top of pump tube

outlet and tightly connect coupling nut to

air motor piston rod (5, 36 and 72).

3 Attach tie rods to pump tube with four

nuts (42). Leave nuts loose.

4 Connect air supply.

5 Slowly cycle pump several times using

only enough air pressure to operate pump

without pump stalling.

6 Stop pump on up stroke and tighten four

nuts (42) to securely fasten air motor to

pump tube.

Modular design of air motor and accessibility

of vital operation parts make service

available without taking air motor out of line

or without complete disassembly.

Power valve

1 Remove four screws (27 and 34).

2 Remove end caps (10 and 14).

3 Push out valve spool (13).

4 Remove spool bumpers (9).

5 Remove o-ring (11).

6 Remove four screws (37) and lift

valve body (12).

7 Remove gasket (15) to complete valve

disassembly.

8 To reassemble, reverse procedure.

WARNING

Do not alter or modify any part of equip-

ment. Always check equipment for proper

operation before each use. Verify safety

devices are in place and operating properly.

Failure to comply may result in death or

serious injury.

NOTE

Ground air motor according to local codes

when ﬂammable materials are pumped.

WARNING

Always disconnect air supply and relieve

pressure before checking, servicing or repair-

ing any part of air motor.

Failure to comply may result in death or

serious injury.

WARNING

Never exceed maximum air or ﬂuid working

pressure of lowest rated system component.

Failure to comply may result in serious

bodily injury and/or property damage.

WARNING

Always read and follow ﬂuid and solvent

manufacturer’s recommendations in regards

to use of protective clothing and equipment.

Failure to comply may result in death or

serious injury.



Air brake

sub-assembly

1 Remove four screws (23) (two on each

end) and pull out air brake subassembly.

2 Remove two screws (39) and lift out

valve body (17).

3 Remove four screws (32) with (two on

each side of air brake) and remove signal

valve caps (31) and air signal valves (20).

4 Remove four (4) screws (80) to remove

labyrinth sub-assembly from air brake.

5 Remove four screws (24) and lift off

upper body (50) and upper gasket (51).

6 Remove gasket plate (52) and

lower gasket (53).

7 Remove air ﬁlter (40) in two locations.

8 Remove pump sleeve (56)

and piston (55).

9 Remove diaphragm seal and retainer,

diaphragm, spring and stop valve

assembly (61, 57, 58, 59 and 60).

10 Remove trip indicator (48).

11 To re-assemble, reverse disassembly

procedure with the following

precautions:

11.1 Upper and lower gaskets (51 and

53) should be coated with ﬁlm of

light oil (SAE ) before assembly.

11.2 When new umbrella valves (63)

are installed, note gasket plate

(52) has a circle and an Xstamped

into both sides. Umbrella valve

is installed into plate from circle

side of plate. One umbrella valve

should be installed into each side

of plate so that valve is within

circle and stub end protrudes

through X.

11.3 After installing umbrella valve

(63), long rubber stem of valve is

to be removed, leaving rubber ball

end intact to secure valve to plate.

11.4 When installing pump sleeve (56)

into lower body (54), sleeve should

be placed into lower body as

shown in Fig. 4. When properly

installed moulded pin protruding

from pump sleeve will ﬁt into

mating hole in gasket (53) and

gasket can then be installed

properly over pins, (66). If sleeve is

not properly aligned as shown, air

brake cannot be assembled

properly.

Labyrinth

sub-assembly

disassembly

procedure

1 Remove four screws (80) from face of

labyrinth sub-assembly to remove

labyrinth from air brake assembly.

2 Remove screw (88) to remove cover (87)

over selector knob if so equipped.

3 Remove selector bolt (86) and washers

(85) to remove selector knob. Use caution

when removing selector knob from

labyrinth assembly, pin (82), spring (83),

and  balls (81) are retained by selector

knob and could be lost.

4 Remove gasket (74) from backside of

labyrinth sub-assembly.

5 Remove six screws (73) from backside of

labyrinth sub-assembly.

6 Separate labyrinth sub-base (75) from

labyrinth cover (78) exposing labyrinth

plate and gasket.

7 Remove gasket (76) and plastic

laminated labyrinth (77).

8 Remove seven o-rings (79) from

labyrinth cover (78).



Cylinder tube and

mufﬂer

1 Remove air brakes subassembly

(Air brake subassembly, page 7).

2 Remove two screws (30) and pull off

mufﬂer (29).

3 Remove gasket (28).

4 Remove four nuts (26).

5 Lift upward and remove

upper casting (8).

6 Remove four tie rods (25).

7 Remove air tube (7).

8 Lift upward and remove cylinder tube (6).

9 Remove piston and piston rod (5).

10 Remove four connecting rods (41).

11 Reverse procedure to reassemble.

Labyrinth

sub-assembly

re-assembly

procedure

Follow reverse directions of disassembly

procedure with the following precautions to

reassemle labyrinth subassembly:

1 Ensure plastic laminated labyrinth (77) is

in good condition before re-assembly.

Clear plastic laminate should be in good

condition without any tears or indications

of separation from brass labyrinth plate

inside. Inspect labyrinth plate for any signs

of blockage including, but not limited to,

dirt, grease, oil or water that should be

visible through clear laminating material.

2 Keep all labyrinth components clean and

free of grease, oil and dirt, except as

noted.

3 Very light coating of grease may be used

to retain balls (79) in place when installing

selector knob (84).

4 Install six screws (73) but do not tighten

when reassembling labyrinth sandwich.

Install selector knob (84) and selector bolt

(86) before tightening six screws (73).

Tighten six screws (73) to  in.lbf

(1,4 Nm). Tighten selector bolt (86) to

 in.lbf (5,6 Nm).

5 Use four screws (80) and tighten to

 in.lbf (1,4 Nm) when installing labyrinth

sub-assembly onto air brake assembly.

6 Do not cut or trim clear laminate plastic

from labyrinth assembly.

NOTE

Align two holes on cylinder tube (6) with two

holes on air brake subassembly before tight-

ening tie rods (25) so that proper seal with

o-rings is achieved.



Setting air brake trip

speed

Selecting speed range letter other than

bypass will activate air brake. Air brake will

stop air motor from operating if threshold

speed setting is exceeded. Air motor will not

restart until intentionally reset. Cause of

pump overrun may be anything that will

allow pump to run faster than normal such

as, but not limited to the following:

Cavitation

Low ﬂuid levels will allow pump to cavitate.

Pump will try to pump air instead of ﬂuid into

ﬂuid lines.

Broken hose or ﬁtting

Broken hose or ﬁtting will cause loss in ﬂuid

pressure allowing pump to run faster than

normal.

Setting speed

1 Remove selector cover (87) by removing

screw (88) to gain access to selector

knob (84).

2 Select bypass mode by positioning

selector knob pointer (small round hole

in face of selector knob) to face of

labyrinth cover (78).

3 Determine speed of pump by counting

number of strokes pump makes per

minute with pump and air motor

operating normally.

4 After determining normal operating

speed of pump and air motor, consult

setting legend on face of labyrinth

cover (78), and ﬁnd speed range closest

to normal operating speed of air motor.

5 To allow for normal ﬂuctuation in

operating speed of air motor and pump,

set selector knob to next highest speed

setting.

6 Test pump in operation to make sure it is

operating properly before leaving

pumping system unattended.

Speed settings

Bypass air brake. In bypass mode air

brake does not provide any protection to

pump or air motor. Air motor will

continue to run at any speed.

See Fig. 13.

1  to  cycles/minute, air brake will trip