Graco Merkur Bellows Use and care manual

Repair/Parts
Merkur™Bellows
Displacement Pump 312793L
EN
For pumping isocyanates, UV coatings, acid catalysts, and other moisture-sensitive
materials. For professional use only.
See page 8 for model information, including maximum working pressures.
Important Safety Instructions
Read all warnings and instructions in this manual.
For complete warnings and instructions see your
pump or package manual. Hazard symbols refer to
specific procedure risks. Save these instructions.
ti14532a

Related Manuals
2312793L
Contents
Related Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Important Two-Component Material Information . 5
Isocyanate Conditions . . . . . . . . . . . . . . . . . . . . . 5
Material Self-ignition . . . . . . . . . . . . . . . . . . . . . . 5
Keep Components A and B Separate . . . . . . . . . 5
Moisture Sensitivity of Isocyanates . . . . . . . . . . . 6
Changing Materials . . . . . . . . . . . . . . . . . . . . . . . 6
Important Acid Catalyst Information . . . . . . . . . . . 7
Acid Catalyst Conditions . . . . . . . . . . . . . . . . . . . 7
Moisture Sensitivity of Acid Catalysts . . . . . . . . . 7
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Component Identification . . . . . . . . . . . . . . . . . . . . 9
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
General Information . . . . . . . . . . . . . . . . . . . . . . 10
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Replace the Bellows . . . . . . . . . . . . . . . . . . . . . 11
Complete Pump Repair . . . . . . . . . . . . . . . . . . . 13
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Repair Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Optional Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
California Proposition 65 . . . . . . . . . . . . . . . . . . . 27
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 28
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 28
Related Manuals
Manual Description
312795 Merkur Bellows Pump Assembly
312796 NXT™Air Motor
312799 Merkur Bellows Spray Packages, AA and
Airless
312798 Merkur Electrostatic Spray Packages

Warnings
312793L 3
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama-
tion point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When
these symbols appear in the body of this manual, refer back to these Warnings. Product-specific hazard symbols and
warnings not covered in this section may appear throughout the body of this manual where applicable.
WARNINGWARNINGWARNING
WARNING
FIRE AND EXPLOSION HAZARD
Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent
fire and explosion:
• Use equipment only in well ventilated area.
• Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop
cloths (potential static arc).
• Keep work area free of debris, including solvent, rags and gasoline.
• Do not plug or unplug power cords, or turn power or light switches on or off when flammable fumes
are present.
• Ground all equipment in the work area. See Grounding instructions.
• Use only grounded hoses.
• Hold gun firmly to side of grounded pail when triggering into pail.
• If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment
until you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
SKIN INJECTION HAZARD
High-pressure fluid from gun, hose leaks, or ruptured components will pierce skin. This may look like just
a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.
• Do not spray without tip guard and trigger guard installed.
• Engage trigger lock when not spraying.
• Do not point gun at anyone or at any part of the body.
• Do not put your hand over the spray tip.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Pressure Relief Procedure when you stop spraying and before cleaning, checking, or
servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately.

Warnings
4312793L
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system com-
ponent. See Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all
equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information about
your material, request MSDS from distributor or retailer.
• Do not leave the work area while equipment is energized or under pressure. Turn off all equipment
and follow the Pressure Relief Procedure when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manufac-
turer’s replacement parts only.
• Do not alter or modify equipment.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
MOVING PARTS HAZARD
Moving parts can pinch, cut or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment,
follow the Pressure Relief Procedure and disconnect all power sources.
SUCTION HAZARD
Powerful suction could cause serious injury.
• Never place hands near the pump fluid inlet when pump is operating or pressurized.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or swal-
lowed.
• Read MSDSs to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
• Always wear chemically impermeable gloves when spraying, dispensing, or cleaning equipment.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or whenin the operating area
of the equipment to help protect you from serious injury, including eye injury, hearing loss, inhalation of
toxic fumes, and burns. This equipment includes but is not limited to:
• Protective eyewear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.
WARNINGWARNINGWARNING
WARNING

Important Two-Component Material Information
312793L 5
Important Two-Component Material Information
Isocyanates (ISO) are catalysts used in two component
materials.
Isocyanate Conditions
Material Self-ignition
Keep Components A and B
Separate
Spraying or dispensing materials that contain
isocyanates creates potentially harmful mists,
vapors, and atomized particulates.
• Read and understand the fluid manufacturer’s
warnings and Safety Data Sheet (SDS) to know
specific hazards and precautions related to
isocyanates.
• Use of isocyanates involves potentially hazardous
procedures. Do not spray with this equipment
unless you are trained, qualified, and have read
and understood the information in this manual and
in the fluid manufacturer’s application instructions
and SDS.
• Use of incorrectly maintained or mis-adjusted
equipment may result in improperly cured
material. Equipment must be carefully maintained
and adjusted according to instructions in the
manual.
• To prevent inhalation of isocyanate mists, vapors,
and atomized particulates, everyone in the work
area must wear appropriate respiratory protection.
Always wear a properly fitting respirator, which
may include a supplied-airrespirator. Ventilate the
work area according to instructions in the fluid
manufacturer’s SDS.
• Avoid all skin contact with isocyanates. Everyone
in the work area must wear chemically
impermeable gloves, protective clothing and foot
coverings as recommended by the fluid
manufacturer and local regulatory authority.
Follow all fluid manufacturer recommendations,
including those regarding handling of
contaminated clothing. After spraying, wash
hands and face before eating or drinking.
Some materials may become self-igniting if applied
too thick. Read material manufacturer’s warnings and
Safety Data Sheet (SDS).
Cross-contamination can result in cured material in
fluid lines which could cause serious injury or
damage equipment. To prevent cross-contamination:
•Never interchange component A and component
B wetted parts.
• Never use solvent on one side if it has been
contaminated from the other side.

Important Two-Component Material Information
6312793L
Moisture Sensitivity of
Isocyanates
Exposure to moisture (such as humidity) will cause ISO
to partially cure; forming small, hard, abrasive crystals,
which become suspended in the fluid. Eventually a film
will form on the surface and the ISO will begin to gel,
increasing in viscosity.
NOTE: The amount of film formation and rate of crystal-
lization varies depending on the blend of ISO, the
humidity, and the temperature.
Changing Materials
NOTICE
Partially cured ISO will reduce performance and the
life of all wetted parts.
• Always use a sealed container with a desiccant
dryer in the vent, or a nitrogen atmosphere.
Never store ISO in an open container.
• Keep the ISO pump wet cup or reservoir (if
installed) filled with appropriate lubricant. The
lubricant creates a barrier between the ISO and
the atmosphere.
• Use only moisture-proof hoses compatible with
ISO.
• Never use reclaimed solvents, which may
contain moisture. Always keep solvent
containers closed when not in use.
• Always lubricate threaded parts with an
appropriate lubricant when reassembling.
NOTICE
Changing the material types used in your equipment
requires special attention to avoid equipment damage
and downtime.
• When changing materials, flush the equipment
multiple times to ensure it is thoroughly clean.
• Always clean the fluid inlet strainers after
flushing.
• Check with your material manufacturer for
chemical compatibility.
• When changing between epoxies and urethanes
or polyureas, disassemble and clean all fluid
components and change hoses. Epoxies often
have amines on the B (hardener) side.Polyureas
often have aminies on the A (resin) side.

Important Acid Catalyst Information
312793L 7
Important Acid Catalyst Information
This pump is designed for acid catalysts (“acid”) currently used in two-component, wood-finishing materials. Current
acids in use (with pH levels as low as 1) are more corrosive than earlier acids. More corrosion-resistant wetted mate-
rials of construction are required, and must be used without substitution, to withstand the increased corrosive proper-
ties of these acids.
Acid Catalyst Conditions
Moisture Sensitivity of Acid
Catalysts
Acid catalysts can be sensitive to atmospheric moisture
and other contaminants. It is recommended the catalyst
pump and valve seal areas exposed to atmosphere are
flooded with ISO oil, TSL, or other compatible material
to prevent acid build-up and premature seal damage
and failure.
Acid is flammable, and spraying or dispensing acid creates potentially harmful mists, vapors, and atomized
particulates. To help prevent fire and explosion and serious injury:
• Read and understand the fluid manufacturer’s warnings and Safety Data Sheet (SDS) to know specific
hazards and precautions related to the acid.
• Use only genuine, manufacturer’s recommended acid-compatible parts in the catalyst system (hoses,
fittings, etc). A reaction may occur between any substituted parts and the acid.
• To prevent inhalation of acid mists, vapors, and atomized particulates, everyone in the work area must
wear appropriate respiratory protection. Always wear a properly fitting respirator, which may include a
supplied-air respirator. Ventilate the work area according to instructions in the acid manufacturer’s SDS.
• Avoid all skin contact with acid. Everyone in the work area must wear chemically impermeable gloves,
protective clothing, foot coverings, aprons, and face shields as recommended by the acid manufacturer
and local regulatory authority. Follow all fluid manufacturer recommendations, including those regarding
handling of contaminated clothing. Wash hands and face before eating or drinking.
• Regularly inspect equipment for potential leaks and remove spills promptly and completely to avoid direct
contact or inhalation of the acid and its vapors.
• Keep acid away from heat, sparks, and open flames. Do not smoke in the work area. Eliminate all ignition
sources.
• Store acid in the original container in a cool, dry, and well-ventilated area away from direct sunlight and
away from other chemicals in accordance with acid manufacturer’s recommendations. To avoid corrosion
of containers, do not store acid in substitute containers. Reseal the original container to prevent vapors
from contaminating the storage space and surrounding facility.
NOTICE
Acid build-up will damage the valve seals and reduce
the performance and life of the catalyst pump. To pre-
vent exposing acid to moisture:
• Always use a sealed container with a desiccant
dryer in the vent, or a nitrogen atmosphere.
Never store acids in an open container.
• Keep the catalyst pump and the valve seals filled
with the appropriate lubricant. The lubricant
creates a barrier between the acid and the
atmosphere.
• Use only moisture-proof hoses compatible with
acids.
• Always lubricate threaded parts with an
appropriate lubricant when reassembling.

Models
8312793L
Models
Check your displacement pump’s identification marking (ID) for the 6-digit part
number. Use the following matrix to define the construction of your displace-
ment pump, based on the six digits. For example, displacement pump Part No.
LB100A represents a 303 stainless steel bellows style displacement pump,
100 cc, with 3 UHMWPE and 2 PTFE v-packings.
To order replacement parts, see Parts section starting on page 18. The digits
in the matrix do not correspond to the reference numbers in the Parts drawings
and lists.
The acid u-cup seal (C) is used only in model LB100C.
ID
ti15221a
L B 100 A
First
Digit Second Digit (Material)
Third, Fourth, and Fifth
Digits
(Displacement Pump
Volume Per Cycle in cc) Sixth Digit
(Packings/Seals)
L
(Lower) BBellows Style 050 A V-Packings (3 UHMWPE, 2 PTFE)
100 B U-Cup Seal
150 CU-Cup Seal, Acid
Part Number Series
Maximum Working
Pressure
psi (MPa, bar) Fluid Inlet Fluid Outlet
LB050A
LB050B A 4500 (33.1, 310 3/4 in. npt 3/8 in. npt
LB100A
LB100B
LB100C A 3600 (24.8, 248) 3/4 in. npt 3/8 in. npt
LB150A
LB150B A 2400 (16.5, 165) 1 in. npt 3/4 in. npt

Component Identification
312793L 9
Component Identification
Key:
A Connecting Rod
BTopCap
C Pump Fluid Inlet
D Bellows Chamber
E Packing Nut
F Cylinder
G Pump Fluid Outlet
H Pump Adapter
JFootCap
FIG. 1. Component Identification
A
B
E
G
C
ti14532a
D
F
H
J

Repair
10 312793L
Repair
General Information
NOTE: Reference numbers and letters in parentheses
in the text refer to the callouts in the figures.
Always use Genuine Graco Parts and Accessories,
available from your Graco distributor. If you supply your
own accessories, be sure they are adequately sized and
pressure rated for your system.
Preparation
Follow all warnings and instructions in your pump man-
ual for the following preliminary steps:
1. Flush the equipment.
2. Stop the pump close to the middle of the stroke.
3. Relieve the pressure.
4. Disconnect the air and fluid hoses and the ground
wire.
5. Remove the shield.
NOTE: If the overflow chamber (optional accessory)
contains fluid, unscrew the bottle (103) and discard. See
FIG. 4. If it has not been used, the bottle can remain
attached to the cap.
6. Use a 5 mm hex wrench to loosen the screws (10)
on the top cap.
7. Hold the coupling nut
with a wrench. Use
another wrench to turn
the motor shaft. To
avoid damage to the
top cap and the
D-shaped seal, do not
turn the coupling nut.
8. Lower the coupling nut
and remove the cou-
pling collars.
9. Push up the motor shaft. Remove the coupling nut.
10. Cart Mount: Tilt the cart onto its back to service the
displacement pump.
To avoid the buildup of electrostatic charge, do not
rub the plastic bottle with a dry cloth while it is
attached to the pump. Remove the bottle to clean, if
needed.
FIG. 2. Remove coupling collars.
FIG. 3. Tilt pump for repair.
ti12815a
hold
turn
ti14531a
10
ti15365a
ti15253a

Repair
312793L 11
Replace the Bellows
Disassemble Bellows and Chamber
1. Follow all steps under Preparation, page 10.
2. Use a 5 mm hex wrench to remove the three screws
(10), then remove the shield mount spacer (9) and
the top cap (8). Remove and discard the bellows
chamber o-ring (12).
3. Leave the overflow chamber attached to the top cap
unless it needs to be replaced.
4. If replacing overflow chamber: Unscrew the bottle
(103) if not already removed, then remove the lid
(101) from the fitting (104). Discard the cup and lid.
Use a socket to remove the retaining nut (105) in
the top cap (8). Remove and discard the D-shaped
seal (106). Leave the fitting (104) attached to the
top cap (8) unless it needs to be replaced.
5. Use a socket to remove the foot cap (42). Remove
and discard the o-ring (41).
6. Hold the hex on the connecting rod (14) with a
19 mm (3/4 in.) wrench. Brace against tie rod or
bench so it cannot turn. Use a socket to loosen the
piston/rod assembly.
7. See FIG. 6. Pull the connecting rod (14) and bellows
(7) out of the top of the bellows chamber (1). Leave
the bellows chamber (1) attached to the packing
nut.
8. Remove the bellows bushing (6) and the damaged
bellows (7).
9. Remove the snap bushing (3). Remove and discard
the o-rings (4, 5).
NOTICE
To avoid damage to the top cap and D-shaped seal,
never apply torque to the connecting rod.
FIG. 4. Overflow chamber
ti15254a
103
8101
106
105
104
102
FIG. 5. Hold connecting rod steady.
hold
turn
ti15252a

Repair
12 312793L
Reassemble Bellows and Chamber
1. Slide the bellows bushing (6) and new bellows (7)
on the connecting rod (14).
2. Install new o-rings (4 and 5) into snap bushing.
Grease and install snap bushing (3) on end of bel-
lows and snap into place.
3. Put the bellows o-ring (12) loosely around the bel-
lows (7). Push the connecting rod (14), with fully
assembled bellows (7) into the bellows chamber (1).
Hand tighten the connecting rod.
4. Hold the hex on the connecting rod (14) and use a
torque wrench to turn the piston (45). Torque to
74-86 ft-lb (100-117 N•m).
5. Make sure the o-ring (12) is against the top of the
bellows. Push the connecting rod (14) and bellows
(7) snugly into the bellows chamber (1).
6. Set top cap (8) on the connecting rod (14). Do not
tighten.
7. If Replacing Overflow Chamber: Order Kit
24E298. (See page 25.) Install the new D-shaped
seal (106) on the connecting rod (14). Hold connect-
ing rod with 19 mm (3/4 in.) wrench. Install and
tighten the retaining nut (105). Torque to 100-120
in-lb (11-14 N•m). Do not overtighten.
8. Install a new foot cap o-ring (41). Grease and install
the foot cap (42). Torque to 54-66 ft-lb (73-89 N•m).
9. Push up on the motor shaft. Slide on the coupling
nut (55). Install the coupling collars (56).
10. Hold connecting rod with 19 mm (3/4 in.) wrench.
Install and tighten the coupling nut. Torque to 75-80
ft-lb (138-146 N•m).
11. If Replacing Overflow Chamber: Insert the o-ring
(102) into the lid (101). Tighten the new bottle (103)
with lid (101) attached, to the fitting (104).
12. Turn connecting rod (14) to align holes intop cap (8)
with holes on bellows chamber (1) so the D-flat in
the top cap faces the front of the pump. Reattach
the top cap (8) and shield mount spacer (9). Torque
screws (10) to 100-120 in-lb (11-14 N•m).
FIG. 6. Replace bellows.
8
9
10
42
14
45
7
1
ti14533a
41
3
4
5
6
Apply thread lubricant.
2
Torque to 100-120 in-lb (11-14 N•m).
3
3
Torque to 74-86 ft-lb (100-117 N•m).
5
2 5
Apply grease.
1
1
1
1
Torque to 54-66 ft-lb (73-89 N•m).
4
2 4
12 1

Repair
312793L 13
Complete Pump Repair
Disassembly
1. Follow all steps under Preparation, page 10.
2. Use a socket to remove the foot cap (42). Remove
and discard the o-ring (41).
3. Use a 5 mm hex wrench to loosen the three screws
(10) on the top cap. Lift the air motor shaft to
remove the top cap (8) and the shield mount spacer
(9) from the bellows chamber.
4. Hold the hex on the connecting rod (14) with a 19
mm (3/4 in.) wrench so it cannot turn. Use a socket
to loosen the piston/rod assembly. See FIG. 5.
5. Pull the piston/rod assembly out of the bottom of the
cylinder (27).
6. V-Packing Models: Remove the piston packings
(37, 39), glands (38, 40), and spring (35). See FIG.
14, page 16.
7. U-Cup Models: Remove the bearing (52), u-cup
(53), and washer (54). See FIG. 13, page 15.
8. Models with overflow chamber: If overflow cham-
ber needs to be replaced, see Replace the Bel-
lows, page 11. If overflow chamber is fine, leave it
attached to the top cap.
9. Remove the connecting rod (14) and bellows (7).
10. Use a 5 mm allen wrench to remove the three
screws (17) and washers (18), then remove the bel-
lows chamber (1). Remove and discard the bellows
chamber o-ring (12).
11. Use a 54 mm (2 1/8 in.) socket wrench to remove
the packing nut (20).
12. V-Packing Models: Remove the glands (23, 26),
throat packings (24, 25), and spring (22). See FIG.
10, page 14.
13. U-Cup Models: Use an o-ring pick or pliers to
remove the spring clip (51), the u-cup (50), and the
bearing (49). FIG. 11, page 15.
14. Remove and discard the packing nut top o-ring (2)
and bottom o-ring (21).
15. Put the hex of the piston rod (31) in a vise. Use a
1/2 in. hex wrench to remove the flow-through nut
(44) from the bottom of the piston (45).
16. Remove the o-ring (32) and seat (46). Remove from
vise and tip out the check ball (47).
FIG. 7. Outlet check.
44 32
46 47
1
2
45
31
Apply lubricant.
1
Torque to 74-86 ft-lb
(100-117 N•m).
2
ti15410a
1/2 in. hex
1

Repair
14 312793L
17. Put the hex of the piston (45) in a vise, then use a
23 mm socket to remove the piston rod (31).
18. Remove the piston o-ring (32) and seat (33).
Remove from vise and tip out the check ball (34)
and spring (36).
19. If the bellows is damaged, see Replace the Bel-
lows, page 11. If not, leave the bellows attached to
the connecting rod.
Reassembly
1. Clamp the hex of the piston (45) in a vise. Install
new spring (36) on the ball stop.
2. Install check ball (34) and seat (33) in the top of the
piston. Grease and install new o-ring (32).
3. With hex of piston (45) still in vise, apply thread
lubricant and then use a socket to reattach the dis-
placement rod (31). Torque to 91-109 ft-lb
(123-148 N•m).
4. Clamp the hex of piston rod in vise. Install new
check ball (47) and seat (46) in the bottom of the
piston. Grease and install new o-ring (32).
5. Grease and reinstall the flow-through nut (44).
Torque to 74-86 ft-lb (100-117 N•m).
6. Place the packing nut (20) upside down on the
bench so packings will align properly.
V-Packing Models: Lubricate and install the female
gland (26), new v-packings, 24, 25) and the male
gland (23) in the packing nut. Lips must face up,
so they will face toward the cylinder when the
packing nut is installed. Push packings all the way
in.
.
U-Cup Models: Lubricate and install the bearing
(49), the u-cup packing (50), and the spring clip
(51). U-cup must face up, so it will face toward
the cylinder when the packing nut is installed.
FIG. 8. Piston check.
FIG. 9. Ball stop spring
45
31
32
34
36
33
ti14536a
Torque to 91-109 ft-lb
(123-148 N•m).
3
Apply thread lubricant.
2
Apply grease.
1
2 3
1
ti15496a
FIG. 10. Throat v-packings
20
26
24
25
23
ti15255a
Apply lubricant.
1
1
1
1
1
Lips face up
(toward cylinder
when installed).
2
2
2

Repair
312793L 15
7. Install the top o-ring (2) and the bottom o-ring (21)
on the packing nut (20).
8. V-Packing Models: Install the spring (22) in the top
of the cylinder (27).
9. Grease and reattachthe packing nut (20). Torque to
54-66 ft-lb (73-89 N•m).
10. Use screws (17) and washers (18) to reattach the
bellows chamber (1). Align the screws so the inlet
fitting does not interfere with the tie rods. Torque
screws (17) to 100-120 in-lb (11-14 N•m).
11. V-Packing Models: Install new piston spring (35).
Lubricate and install male gland (40), new piston
packings (37, 39), and female gland (38) on the dis-
placement rod (31). Lips must face toward the
cylinder.
12. U-Cup Models: Lubricate and install the washer
(54), u-cup (53), and bearing (52). U-cup must face
toward the cylinder.
FIG. 11. U-Cup throat seal
FIG. 12. Bellows chamber and packing nut.
ti15259a
20
49
50
51
Apply grease.
1
1
1
1
U-cup faces up
(toward cylinder
when installed).
2
2
17 (x 3)
1
220 22
21
18 (x 3)
Apply grease.
1
1
Apply thread lubricant.
2
Torque to 54-66 ft-lb (73-89 N•m).
4
2 4 1
1
Torque to 100-120 in-lb (11-14 N•m).
3
3ti14534a
FIG. 13. U-Cup piston seal
ti15260a
54
53
52
Apply lubricant.
1
1
11
Lips face toward
cylinder.
2

Repair
16 312793L
13. Grease the outside of the displacement rod shaft
and the piston, near the hexes. Push the rod and
the piston into the cylinder (27).
14. If Replacing Bellows: Follow steps 1 and 2 under
Reassemble Bellows and Chamber, page 12, to
put new bellows on connecting rod.
15. See FIG. 6, page 12. Put the bellows o-ring (12)
loosely around the bellows (7). Push the connecting
rod (14), with fully assembled bellows (7) into the
bellows chamber (1). Hand tighten the connecting
rod.
16. Hold the hex on the connecting rod (14) and use a
torque wrench to turn the piston (45). Torque to
74-86 ft-lb (100-117 N•m).
17. Set top cap (8) on the connecting rod (14). Do not
tighten.
18. If Replacing Overflow Chamber: Order Kit
24E298. (See page 25.) Install the new D-shaped
seal (106) on the connecting rod (14). Hold connect-
ing rod with 19 mm (3/4 in.) wrench. Install and
tighten the retaining nut (105). Torque to 100-120
in-lb (11-14 N•m). Do not overtighten.
19. Install a new foot cap o-ring (41). Grease and install
the foot cap (42). Torque to 54-66 ft-lb (73-89 N•m).
20. Push up on the motor shaft. Slide on the coupling
nut (55). Install the coupling collars (56).
21. Hold air motor shaft. Install and tighten the coupling
nut. Torque to 75-80 ft-lb (138-146 N•m).
22. If Replacing Overflow Chamber: Insert the o-ring
(102) into the lid (101). Tighten the new bottle (103)
with lid (101) attached, to the fitting (104).
23. Turn connecting rod (14) to align holes intop cap (8)
with holes on bellows chamber (1). Reattach the top
cap (8) and shield mount spacer (9). Torque screws
(10) to 100-120 in-lb (11-14 N•m).
NOTE: The overflow chamber fits best if the D flat is
aligned to the front of the pump.
Inlet or Outlet Fitting Repair
Remove and replace the inlet or outlet fitting only if dam-
aged. Replace one or both o-rings if a leak or seepage
is present and every time a fitting is removed. To reas-
semble, grease the o-ring and apply high-strength
thread locker to the fitting. Torque to 54-66 ft-lb
(73-89 N•m).
FIG. 14. Piston v-packings
35
41 42
45
31
40
38
37
39
ti14535a
Apply grease.
1
111
1
1
1
Torque to 91-109 ft-lb (123-148 N•m).
4
Apply thread lubricant.
2
2 4
Torque to 100-120 in-lb (11-14 N•m).
3
23
Lips face toward cylinder.
5
5
5

Repair
312793L 17

Parts
18 312793L
Parts
Models with V-Packings
Apply grease.
1
ti15222a
10
9
8
7
17
18
2
14
3
65
4
1
21
26
25
25
24
24
24
20
22
23
27
28
29
31
32
33
34
45
47
46
32
44
35
40
37
39
37
39
37
38
41
42
Apply thread lubricant.
2
Torque to 100-120 in-lb (11-14 N•m).
3
Torque to 54-66 ft-lb (73-89 N•m).
4
Torque to 74-86 ft-lb (100-117 N•m).
5
Torque to 91-109 ft-lb (123-148 N•m).
6
4
5
6
6
4
3
3
1
1
1
1
1
1
1
1
12
15
19
36
5
2
2
2
2
Lips face
down.
Lips
face
up.
2
1
1

Parts
312793L 19
Models with V-Packings
NOTE: Many parts are available in one or more Service/Repair kits. See page 24.
4
NOTE: Replacement Danger and Warning labels, tags,
and cards are available at no cost.
--- Parts not sold separately. See pages 24-25 for
available kits.
Ref Description Part Qty
1 BELLOWS CHAMBER KIT (includes 2,
12, 15, 17, 18, 21, 32, and 41) 1
LBO50A 24E758
LB100A and LB150A 24E759
2 O-RING, packing nut, top 113082 1
3 BUSHING, snap ----- 1
4 O-RING, snap bushing 110135 1
5 O-RING, snap bushing C20182 1
6 BUSHING, bellows ----- 1
7 BELLOWS KIT (includes 2, 4, 5, 12, 21,
32, and 41) 1
LB050A 24A267
LB100A and LB150A 24E764
8 TOP CAP KIT (includes 9, 10, and 12) 24A271 1
9 SPACER, shield mount ----- 1
10 SCREW, M6 x 40; see Hardware Kit,
page 24 117030 3
12 O-RING, bellows chamber 116377 1
14 CONNECTING ROD KIT (includes 4, 5,
12, 32, and 41) 24E762 1
15 INLET FITTING KIT 1
LB050A and LB100A,
3/4-14 npt x 1 3/16-16 un 24A842
LB150A
1-11.5 npt x 1 3/16-16 un 24E711
17 SCREW, bellows chamber, M6 x 25,
see Hardware Kit, page 24 117029 3
18 WASHER, bellows chamber;
see Hardware Kit, page 24 117018 3
19 OUTLET FITTING KIT (includes 48) 1
LB050A and LB100A,
3/8-18 npt x 3/4-16 un 24A840
LB150A, 3/4-14 npt x 1 3/16-16 un 24A842
20 PACKING NUT KIT (includes 2, 12, 21,
32, and 41) 1
LB050A 24F837
LB100A 24F223
LB150A 24F224
21 O-RING, packing nut, bottom 1
LB050A 107078
LB100A 104537
LB150A 110492
22 SPRING ----- 1
23 GLAND, male ----- 1
24 V-PACKING, UHMWPE ----- 3
25 V-PACKING, PTFE ----- 2
26 GLAND, female ----- 1
27 CYLINDER KIT (includes 2, 12, 19, 21,
32, 41, and 48) 1
LB050A 24A828
LB100A 24A829
LB150A 24A830
28 ADAPTER, pump ----- 1
29 JAM NUT 1
LB050A 24A635
LB100A 24A637
LB150A 24A639
31 DISPLACEMENT ROD KIT (includes 2,
12, 21, 32, and 41) 1
LB050A 24F492
LB100A 24F296
LB150A 24F295
32 O-RING, piston ----- 2
33 SEAT, tungsten carbide ----- 1
34 CHECK BALL, stainless steel 1
LB050A 101947
LB100A and LB150A 107203
35 SPRING ----- 1
36 SPRING, ball stop ----- 1
37 V-PACKING, UHMWPE ----- 3
38 GLAND, female ----- 1
39 V-PACKING, PTFE ----- 2
40 GLAND, male ----- 1
41 O-RING, foot cap ----- 1
42 FOOT CAP KIT (includes 41) 1
LB050A 24A831
LB100A 24A832
LB150A 24A833
44 FLOW-THROUGH NUT ----- 1
45 PISTON KIT (includes 2, 12, 21, 32, and
41) 1
LB050A 24F488
LB100A 24F489
LB150A 24F490
46 SEAT, tungsten carbide ----- 1
47 CHECK BALL, stainless steel 1
LB050A 101947
LB100A and LB150A 101859
48 O-RING, outlet fitting, not shown ----- 1
55 NUT, coupling 15T311 1
56 COLLARS, coupling; see page 24 for
pack of 10 184128 2
Ref Description Part Qty

Parts
20 312793L
Models with U-Cup Packings (Non-acid)
Apply grease.
1
ti15261a
10
9
8
7
17
18
2
14
3
6
5
4
1
21
49
50
20
51
27
28
29
31
32
33
34
45
47
46
32
44
54
53
52
41
42
Apply thread lubricant.
2
Torque to 100-120 in-lb (11-14 N•m).
3
Torque to 54-66 ft-lb (73-89 N•m).
4
Torque to 74-86 ft-lb (100-117 N•m).
5
Torque to 91-109 ft-lb (123-148 N•m).
6
4
6
6
4
3
3
1
1
1
1
1
1
1
12
19
15
36
1
5
52
22
2
U-cup
faces
down.
U-cup
faces
up.
2
1
1