Graco T2 User manual

WLD
311882U
EN
Instructions
T2
2:1 Ratio Transfer Pump
For use with polyurethane foam, polyurea, and similar non-flammable materials. For
professional use only.
Not approved for use in European explosive atmosphere locations.
Model 295616 (55-gallon drum)
180 psi (1.2 MPa, 12 bar) Maximum Air Working Pressure
405 psi (2.7 MPa, 27 bar) Maximum Fluid Working Pressure
Important Safety Instructions
Read all warnings and instructions in
this manual before using the equipment.
Save these instructions.

2311882U
Contents
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Important Isocyanate (ISO) Information . . . . . . . . . 5
Isocyanate Conditions . . . . . . . . . . . . . . . . . . . . . 5
Material Self-Ignition . . . . . . . . . . . . . . . . . . . . . . 6
Keep Components A and B Separate . . . . . . . . . 6
Moisture Sensitivity of Isocyanates . . . . . . . . . . . 6
Foam Resins with 245 fa Blowing Agents . . . . . . 7
Changing Materials . . . . . . . . . . . . . . . . . . . . . . . 7
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Typical Installation, without Circulation . . . . . . . . 8
Typical Installation, with Circulation . . . . . . . . . . . 9
Typical Installation for Lubrication Applications . 10
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
System Accessories. . . . . . . . . . . . . . . . . . . . . . 11
Air Line Accessories . . . . . . . . . . . . . . . . . . . . . 11
Fluid Line Accessories . . . . . . . . . . . . . . . . . . . . 11
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Grounding the System . . . . . . . . . . . . . . . . . . . . 13
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Pressure Relief Procedure . . . . . . . . . . . . . . . . . 14
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Daily Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Daily Shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . 15
Repair the Air Motor . . . . . . . . . . . . . . . . . . . . . . . . 16
Repair the Pump Lower . . . . . . . . . . . . . . . . . . . . . 18
Reassemble the Air Motor and the Pump Lower . 21
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Parts - Model 295616 . . . . . . . . . . . . . . . . . . . . . . . 22
Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Performance Chart . . . . . . . . . . . . . . . . . . . . . . . . . 26
Calculate Fluid Outlet Pressure (black curves) . 26
Calculate Pump Air Consumption (gray curves). 26
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Technical Specifications . . . . . . . . . . . . . . . . . . . . 29
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 30
Graco Information. . . . . . . . . . . . . . . . . . . . . . . . . . 30

Warnings
311882U 3
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The
exclamation point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risk.
Refer back to these warnings. Additional, product-specific warnings may be found throughout the body of this manual
where applicable.
WARNING
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
swallowed.
• Read MSDS’s 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 impervious gloves when spraying or cleaning equipment.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when in the operating
area of the equipment to help protect you from serious injury, including eye injury, inhalation of toxic
fumes, burns, and hearing loss. This equipment includes but is not limited to:
• Protective eyewear
• Clothing and respirator as recommended by the fluid and solvent manufacturer
• Gloves
• Hearing protection
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
component. See Technical Specifications in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical
Specifications in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For
complete information about your material, request MSDS forms from distributor or retailer.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine
manufacturer’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.

Warnings
4311882U
PRESSURIZED EQUIPMENT HAZARD
Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the eyes or on skin and
cause serious injury.
• Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning,
checking, or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
BURN HAZARD
Equipment surfaces and fluid that is heated can become very hot during operation. To avoid severe
burns:
• Do not touch hot fluid or equipment.
MOVING PARTS HAZARD
Moving parts can pinch 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 in this manual. Disconnect power or air supply
WARNING

Important Isocyanate (ISO) Information
311882U 5
Important Isocyanate (ISO) Information
Isocyanates (ISO) are catalysts used in two component materials.
Isocyanate Conditions
Spraying or dispensing fluids that contain isocyanates creates potentially harmful mists, vapors, and atomized
particulates.
• Read and understand the fluid manufacturer’s warnings and Safety Data Sheets (SDSs) 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 SDSs.
• Use of incorrectly maintained or mis-adjusted equipment may result in improperly cured material, which could
cause off gassing and offensive odors. 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-air respirator. Ventilate the work area according to instructions in the fluid manufacturer’s SDSs.
• 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.
• Hazard from exposure to isocyanates continues after spraying. Anyone without appropriate personal
protective equipment must stay out of the work area during application and after application for the time
period specified by the fluid manufacturer. Generally this time period is at least 24 hours.
• Warn others who may enter work area of hazard from exposure to isocyanates. Follow the recommendations
of the fluid manufacturer and local regulatory authority. Posting a placard such as the following outside the
work area is recommended:
TOXIC FUMES
HAZARD
DO NOT ENTER DURING
SPRAY FOAM APPLICATION
OR FOR ___ HOURS AFTER
APPLICATION IS COMPLETE
DO NOT ENTER UNTIL:
DATE:
TIME:
____________
____________

Important Isocyanate (ISO) Information
6311882U
Material Self-Ignition
Keep Components A and B
Separate
Moisture Sensitivity of
Isocyanates
Exposure to moisture (such as humidity) will cause ISO
to partially cure, forming small, hard, abrasive crystal
that 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
crystallization varies depending on the blend of ISO, the
humidity, and the temperature.
Spraying or dispensing fluids that contain isocyanates
creates potentially harmful mists, vapors, and
atomized particulates.
• Read and understand the fluid manufacturer’s
warnings and Safety Data Sheets (SDSs) 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 SDSs.
• 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-air respirator. Ventilate the
work area according to instructions in the fluid
manufacturer’s SDSs.
• 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 Sheets (SDSs).
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.
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.

Important Isocyanate (ISO) Information
311882U 7
Foam Resins with 245 fa
Blowing Agents
Some foam blowing agents will froth at temperatures
above 90°F (33°C) when not under pressure, especially
if agitated. To reduce frothing, minimize preheating in a
circulation system.
Changing Materials
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 amines on the B (resin) side.

Typical Installation
8311882U
Typical Installation
Typical Installation, without Circulation
Key:
A Reactor Proportioner
BHeatedHose
C Fluid Temperature Sensor (FTS)
D Heated Whip Hose
E Fusion Spray Gun
F Proportioner and Gun Air Supply Hose
G Feed Pump Air Supply Lines (3/8 in. (76 mm) ID min.
H Waste Containers
J Fluid Supply Lines (217382)
K Feed Pumps
L Agitator
M Desiccant Dryer
N Bleed Lines/Over Pressure Relief
P Gun Fluid Manifold
FIG. 1: Typical Installation, without Circulation
A
B
C*
DE
K
L
M
F
P
N
* Shown exposed for clarity. Wrap with tape during operation.
K
H
J
G
ti11572a

Typical Installation
311882U 9
Typical Installation, with Circulation
Key:
A Reactor Proportioner
B Heated Hose
C Fluid Temperature Sensor (FTS)
D Heated Whip Hose
E Fusion Spray Gun
F Proportioner and Gun Air Supply Hose
G Feed Pump Air Supply Lines (3/8 in. (76 mm) ID min)
J Fluid Supply Lines
K Feed Pumps
L Agitator
M Desiccant Dryer
N Recirculation/Over Pressure Relief Return Hoses
P Gun Fluid Manifold
FIG. 2: Typical Installation, with Circulation
A
B
C*
D
E
K
L
M
F
N
P
* Shown exposed for clarity. Wrap with tape during operation.
J
N
K
M
G
ti11571a

Typical Installation
10 311882U
Typical Installation for Lubrication Applications
Key:
AA Pump Air Regulator
AB Air Line Lubricator
AC Air Line Filter
AD Bleed-Type Master Air Valve (required, for pump)
AE Fluid Drain Valve (required)
AF Bung Adapter
AG Grounded Air Hose
AH Grounded Fluid Hose
AJ Pump Fluid Inlet
AK 1/4 npt(f) Pump Air Inlet
AL 3/4 npt(f) Pump Fluid Outlet
FIG. 3: Typical Installation for Lubrication Applications
AA AB AC AD
AE
AF
AH
J
AJ
CE
AK
AG
01349
AD

Installation
311882U 11
Installation
System Accessories
To ensure maximum pump performance, be sure that all
accessories used are properly sized to meet your
system’s requirements. See Accessories, page 24.
Air Line Accessories
Install the following accessories in the order shown in
the Gun Fluid Manifold, page 9, using adapters as
necessary:
An air line lubricator (AB) provides automatic air
motor lubrication.
A bleed-type master air valve (AD) is required in your
system to relieve air trapped between it and the air
motor when the valve is closed (see the WARNING on
left). Be sure the bleed valve is easily accessible from
the pump, and is located downstream from the air
regulator.
An air line filter (AC) to remove harmful dirt and
moisture from the compressed air supply.
A second bleed-type air valve (AD) isolates the air line
accessories for servicing. Locate upstream from all
other air line accessories.
Fluid Line Accessories
A fluid drain valve (BA) is required in your system to
relieve fluid pressure in the hose and gun (see the
WARNING on left). Install the drain valve so that it
points down and the handle points up when the valve is
opened.
A bleed-type master air valve (D) and a fluid drain
valve (E) are required in your system, to help reduce
the risk of serious injury, including splashing fluid in
the eyes or on the skin, and injury from moving parts
when you are adjusting or repairing the pump.
• The bleed-type master air valve (D) relives air
trapped between this valve and the pump after the
pump is shut off. Trapped air can cause the pump
to cycle unexpectedly and result in serious injury,
including amputation. Install the valve close to the
pump.
• The fluid drain valve (E) helps relieve pressure in
the displacement pump, hose, and dispensing
valve when shutting off the pump. Actuating the
dispensing valve to relieve pressure may not be
sufficient, especially if there is a clog in the hose or
the spray gun or dispensing valve.

Setup
12 311882U
Setup
1. Apply thread sealant to the male threads of the air
needle valve (48) and the quick disconnect fitting
(49) and install. See FIG. 4
2. Apply thread sealant to the male outlet fitting (not
supplied) and insert into the outlet port. See FIG. 5.
3. Use labels (70) provided to identify the appropriate
pump for your material. See FIG. 5.
4. Lubricate the bung adapter inside diameter and
mounting threads. Install supplied handles and
tighten the jam nuts. Install supplied handles and
tighten the jam nuts. Ensure the gasket is in place
and screw the bung adapter (51) securely into the
bunghole of the drum. Insert the pump through the
adapter and lock it in place. See FIG. 7.
FIG. 4
FIG. 5
WLD
48
49
1
Apply thread sealant
1
1
Apply thread sealant
1
1
1
FIG. 6
FIG. 7
E
51
Lubricate threads
2
2

Setup
311882U 13
5. Install air line (3/8 in. (76 mm) ID minimum) with
quick disconnect air coupler (52) provided. See FIG.
8.
Grounding the System
To reduce the risk of static sparking, ground the pump
and all other equipment used or located in the pumping
area. Check your local electrical code for detailed
grounding instructions for your area and type of
equipment. Ground all of this equipment.
Pump: Connect Ground Wire (Y) to grounding screw
(72) and tighten the screw securely. See FIG. 9.
Connect the other end of the wire to a true earth ground.
Make certain to comply with all National, State, and
Local Electrical Codes.
Air compressor: Follow manufacturer’s
recommendations.
Fluid hoses: Use only grounded hoses with a
maximum of 300 ft (91 m) combined hose length to
ensure grounding continuity. Refer to Hose Grounding
Continuity.
Dispensing valve: Ground through connection to a
properly grounded fluid hose and pump.
Object being sprayed: Follow local code.
Fluid supply container: Follow local code.
Solvent pails used when flushing: Follow local code.
Use only conductive metal pails, placed on a grounded
surface. Do not place the pail on a nonconductive
surface, such as paper or cardboard, which interrupts
grounding continuity.
To maintain grounding continuity when flushing or
relieving pressure: Hold metal part of the spray
gun/dispense valve firmly to the side of a grounded
metal pail, then trigger the gun/valve.
FIG. 8
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. Grounding provides an escape wire
for the electric current.
52
FIG. 9
WLD
Y
72

Operation
14 311882U
Operation
Pressure Relief Procedure
1. Shut off the air to the pump.
2. Close the bleed-type master air valve (D).
3. Hold a metal part of the dispense valve firmly to a
grounded metal pail. Trigger the valve to relieve
pressure.
4. Open all fluid drain valves in the system, having a
waste container ready to catch drainage. Leave
drain valve(s) open until you are ready to dispense
again.
5. If you suspect the nozzle or hose is clogged or that
pressure has not been fully relieved after following
the steps above, VERY SLOWLY loosen the hose
end coupling to relieve pressure gradually, then
loosen completely. Clear hose or nozzle
obstruction.
Flushing
1. Follow Pressure Relief Procedure, page 14.
2. Allow the fluid in the system to cool.
3. Remove spray tip and soak in solvent.
4. Place pump fluid inlet in grounded metal pail
containing cleaning fluid.
5. Set pump to lowest possible fluid pressure, and start
pump.
6. Hold a metal part of the gun or dispense valve firmly
to a grounded metal pail. Trigger the gun or
dispense valve until clean solvent dispenses.
7. Remove gun or dispense valve from hose. See gun
manual to further clean gun or dispense valve.
8. Follow Pressure Relief Procedure, page 14, and
Remove fluid filter and soak in solvent. Replace
filter cap.
Follow the Pressure Relief Procedure
whenever you see this symbol.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief
Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
To avoid fire and explosion, always ground
equipment and waste container. To avoid static
sparking and injury from splashing, always flush at
the lowest possible pressure.
Hot solvent may ignite. To avoid fire and explosion:
• Flush equipment only in a well-ventilated area
• Flush at the lowest pressure possible. Check
connectors for leaks and tighten as necessary.
• Flush with a fluid that is compatible with the fluid
being dispensed and the equipment wetted parts.

Operation
311882U 15
Daily Startup
1. Verify that the air needle valve is closed.
2. Connect the air line quick disconnect coupler to the
transfer pump
3. Turn on the main air supply.
4. Slowly open the air needle valve until the transfer
pump runs slowly.
5. Use the air needle valve to control the pump speed.
Daily Shutdown
1. Disconnect air line coupler.
2. When air pressure is bled off, close the air line
needle valve.
NOTICE
Never allow the pump to run dry of the fluid being
pumped. A dry pump will quickly accelerate to a high
speed and could cause damage to the pump. If the
pump accelerates quickly or starts running too fast,
stop it immediately and check the fluid supply. If the
supply container is empty or air has been pumped
into the lines, refill the container and prime the pump
and the lines with fluid, or flush and leave it filled with
a compatible solvent. Be sure to eliminate all air from
the fluid system.
Do not attempt to operate pump unless it is securely
mounted in a drum.

Repair the Air Motor
16 311882U
Repair the Air Motor
NOTE: Air valve assembly has changed to series B for
improved performance. Parts are not interchangeable
between series A and B air motor. Series A air valves
can be upgraded to series B with kit 262042.
1. Relieve the pressure. Follow Pressure Relief
Procedure, page 14.
2. Remove cap (1), cylinder (4), and square gaskets
(3*). Inspect all parts, including spring under cap
(not shown in FIG. 10) for damage and replace if
necessary. See FIG. 10. Unscrew by hand or use a
chain wrench to prevent distortion of the cylinder’s
shape.
NOTE: Cap (1) was replaced with a spring stop
assembly for improved spring life. Existing pumps can
be upgraded with Kit 24T043.
NOTE: Series A air motors have thin, flat, white seals in
air valve. Series B (and later) air motors have thicker
black seals in the air valve.
3. Series A air motors only: Loosen set screw (18)
and unscrew air valve (5). If necessary to assist
turning, wedge a screwdriver blade between the
screw heads and the hex cap of air valve (5).
Discard items 5, 13, 15, and 18. See FIG. 11.
4. Series B (and later Air Motors): Unscrew air
valve (5). If necessary to assist turning, wedge a
screwdriver blade between the screw heads and the
hex cap of the air valve (5). Inspect o-rings (13* and
15*) for damage and replace if necessary. Ensure
o-ring (13*) is correctly positioned and not pinched.
See FIG. 12.
FIG. 10
WLD
1
*3
*3
4
FIG. 11: Series A Air Valve
FIG. 12 Series B Air Valve
5
*13
*15
18
WLD
5
*13
*15

Repair the Air Motor
311882U 17
5. Align slot of shield (75) with piston hole and place
pin tool (69) in piston hole to prevent piston from
turning. Use second pin tool (69) to unscrew piston
cap (17) and separate from piston (21) to expose
dowel pin (19). See FIG. 13.
6. Remove dowel pin (19) and take piston cap (17) off
transfer shaft (20). Remove o-ring (50*) from piston
cap. Inspect all parts for damage. See FIG. 14.
7. Slide air piston (21) out the top of the air motor base
(23). Remove o-ring (24*) from air motor base.
Inspect all parts, including the spring (22) in the air
motor base, for damage. See FIG. 15.
FIG. 13
FIG. 14
WLD
21
69
69
17
75
WLD
19
*50
17
20
FIG. 15
WLD
21
22
23
*24

Repair the Pump Lower
18 311882U
Repair the Pump Lower
n
1. Relieve the pressure. Follow Pressure Relief
Procedure, page 14.
1. Allow the fluid in the system to cool.
2. Use a chain wrench near the top of the suction tube
at the point indicated in FIG. 16, and a wrench on
the flats of the foot valve (45) to loosen the foot
valve from the suction tube (44). To prevent
damage to the suction tube, do not remove the foot
valve until instructed to do so in step 4.
3. With the foot valve still in place to support the
suction tube, use a chain wrench near the bottom of
the suction tube at the point indicated in FIG. 17, to
loosen the suction tube (44) from the pump body
(34).
4. Remove the foot valve assembly from the suction
tube (44).
5. Remove retaining ring (46), snap ring (47), ball (71),
and o-ring (38*) from foot valve (45). Inspect all
parts for damage. See FIG. 17.
6. Remove suction tube (44) from pump body (34).
See FIG. 18.
7. Inspect o-ring (38) on pump body and suction tube
for damage. See FIG. 18.
FIG. 16
NOTICE
When removing the suction tube, be very careful not
to bend, dent, or damage it. To avoid damage, use
the chain wrench only at the top and bottom of the
suction tube as indicated in FIG. 16 and FIG. 17. Do
not apply the wrench to the middle of the suction
tube.
44
Apply chain wrench
approximately here
FIG. 17
FIG. 18
ti9903
46
47
71
*38
45
Apply chain wrench
approximately here
44
44
ti9976
38
34
Apply chain wrench
approximately here

Repair the Pump Lower
311882U 19
8. Pull transfer shaft (20) out the bottom of pump body
(34). See FIG. 19.
9. Remove pin (56). Remove piston valve assembly.
Unscrew piston valve (43) from piston housing (53).
Remove wear ring (41*), u-cup (40*) and ball (42).
Inspect all parts for damage. See FIG. 20.
10. Remove pins (55). See FIG. 21.
NOTE: Series A and B pumps were equipped with
springs pins. In Series C pumps, these pins were
replaced with a solid clevis pin (55, 56).
11. Loosen set screw (37) from collar (36). Remove
collar from piston housing (54). Remove u-cup
(35*). Inspect all parts for damage. See FIG. 22.
FIG. 19
FIG. 20
ti9905
20
34
ti9904b
56
*40
*41
42
43
53
Lip up
FIG. 21
FIG. 22
55
54
74
r_311880_14e_fig21
36
35
55
37
36
*35
54
Lip down
r_311882_14e_fig22

Repair the Pump Lower
20 311882U
12. Unscrew mounting flange (26) from pump body
(34). Remove o-ring (32*) and PTFE gasket (33*)
from pump body (34). Inspect all parts for damage.
See FIG. 23.
NOTE: Align a bottom slot of the shield (75) and use pin
tool (69) to loosen the hex nut/packings from the pump
shaft.
13. Remove hex nut (27) from mounting flange (26).
Remove female gland (30*), 2 PTFE packings (29*),
male gland (28*) and wiper (31*). Inspect all parts
for damage. See FIG. 25.
14. Unscrew three fasteners (60) to remove the flange
(26) and tie-rods (25). Slide the guard (75) out.
Unscrew the tie rods (25) using the wrench flats at
the bottom.
FIG. 23
WLD
26
*33
*32
34
FIG. 24
WLD
75
60
26
25
FIG. 25
WLD
Seal stack enlarged
to show detail.
27
*30
*29
*28
*31
69
75