AIRLESSCO SL1100 Series B Operating instructions

3A1184A
ENG
Operation/Repair/Parts
Airless Paint Sprayer
For application of architectural paints and coatings. For professional use only.
Airlessco - SL1100 (24F572)
AllPro - Mustang 11000 (24F584)
3000 psi (20.7MPa, 207 bar) Maximum Working Pressure
Related Manuals
Important Safety Instructions
Read all warnings and instructions in this
manual. Save these instructions.
Gun Manual
312363 - English
312364 - Spanish
312365 - French
ti16141a

Warnings
23A1184A
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
GROUNDING
This product must be grounded. In the event of an electrical short circuit, grounding reduces the risk of
electric shock by providing an escape wire for the electric current. This product is equipped with a cord
having a grounding wire with an appropriate grounding plug. The plug must be plugged into an outlet that
is properly installed and grounded in accordance with all local codes and ordinances.
• Improper installation of the grounding plug is able to result in a risk of electric shock.
• When repair or replacement of the cord or plug is required, do not connect the grounding wire to either
flat blade terminal.
• The wire with insulation having an outer surface that is green with or without yellow stripes is the
grounding wire.
• Check with a qualified electrician or serviceman when the grounding instructions are not completely
understood, or when in doubt as to whether the product is properly grounded.
• Do not modify the plug provided; if it does not fit the outlet, have the proper outlet installed by a
qualified electrician.
• This product is for use on a nominal 120V circuit and has a grounding plug similar to the plug
illustrated in the figure below.
• Only connect the product to an outlet having the same configuration as the plug.
• Do not use an adapter with this product.
Extension Cords:
• Use only a 3-wire extension cord that has a 3-blade grounding plug and a 3-slot receptacle that
accepts the plug on the product.
• Make sure your extension cord is not damaged. If an extension cord is necessary, use 12 AWG
(2.5 mm2) minimum to carry the current that the product draws.
• An undersized cord results in a drop in line voltage and loss of power and overheating.

Warnings
3A1184A 3
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:
• Do not spray flammable or combustible materials near an open flame or sources of ignition such as
cigarettes, motors, and electrical equipment.
• Paint or solvent flowing through the equipment is able to result in static electricity. Static electricity
creates a risk of fire or explosion in the presence of paint or solvent fumes. All parts of the spray
system, including the pump, hose assembly, spray gun, and objects in and around the spray area shall
be properly grounded to protect against static discharge and sparks. Use Airlessco conductive or
grounded high-pressure airless paint sprayer hoses.
• Verify that all containers and collection systems are grounded to prevent static discharge.
• Connect to a grounded outlet and use grounded extensions cords. Do not use a 3-to-2 adapter.
• Do not use a paint or a solvent containing halogenated hydrocarbons.
• Keep spray area well-ventilated. Keep a good supply of fresh air moving through the area. Keep pump
assembly in a well ventilated area. Do not spray pump assembly.
• Do not smoke in the spray area.
• Do not operate light switches, engines, or similar spark producing products in the spray area.
• Keep area clean and free of paint or solvent containers, rags, and other flammable materials.
• Know the contents of the paints and solvents being sprayed. Read all Material Safety Data Sheets
(MSDS) and container labels provided with the paints and solvents. Follow the paint and solvents
manufacturer’s safety instructions.
• Fire extinguisher equipment shall be present and working.
• Sprayer generates sparks. When flammable liquid is used in or near the sprayer or for flushing or
cleaning, keep sprayer at least 20 feet (6 m) away from explosive vapors.
ELECTRIC SHOCK HAZARD
This equipment must be grounded. Improper grounding, setup, or usage of the system can cause electric
shock.
• Turn off and disconnect power at main switch before disconnecting any cables and before servicing
equipment.
• Connect only to grounded power source.
• All electrical wiring must be done by a qualified electrician and comply with all local codes and
regulations.

Warnings
43A1184A
SKIN INJECTION HAZARD
High-pressure spray is able to inject toxins into the body and cause serious bodily injury. In the event that
injection occurs, get immediate surgical treatment.
• Do not aim the gun at, or spray any person or animal.
• Keep hands and other body parts away from the discharge. For example, do not try to stop leaks with
any part of the body.
• Always use the nozzle tip guard. Do not spray without nozzle tip guard in place.
• Use Airlessco nozzle tips.
• Use caution when cleaning and changing nozzle tips. In the case where the nozzle tip clogs while
spraying, follow the Pressure Relief Procedure for turning off the unit and relieving the pressure
before removing the nozzle tip to clean.
• Do not leave the unit energized or under pressure while unattended. When the unit is not in use, turn
off the unit and follow the Pressure Relief Procedure for turning off the unit.
• Check hoses and parts for signs of damage. Replace any damaged hoses or parts.
• This system is capable of producing 3000 psi. Use Airlessco replacement parts or accessories that are
rated a minimum of 3000 psi.
• Always engage the trigger lock when not spraying. Verify the trigger lock is functioning properly.
• Verify that all connections are secure before operating the unit.
• Know how to stop the unit and bleed pressure quickly. Be thoroughly familiar with the controls.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Always wear appropriate gloves, eye protection, and a respirator or mask when painting.
• Do not operate or spray near children. Keep children away from equipment at all times.
• Do not overreach or stand on an unstable support. Keep effective footing and balance at all times.
• Stay alert and watch what you are doing.
• Do not leave the unit energized or under pressure while unattended. When the unit is not in use, turn
off the unit and follow the Pressure Relief Procedure for turning off the unit.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not kink or over-bend the hose.
• Do not expose the hose to temperatures or to pressures in excess of those specified by Airlessco.
• Do not use the hose as a strength member to pull or lift the equipment.
PRESSURIZED ALUMINUM PARTS HAZARD
Use of fluids that are incompatible with aluminum in pressurized equipment can cause serious chemical
reaction and equipment rupture. Failure to follow this warning can result in death, serious injury, or
property damage.
• Do not use 1,1,1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or
fluids containing such solvents.
• Many other fluids may contain chemicals that can react with aluminum. Contact your material supplier
for compatibility.
WARNINGWARNINGWARNING
WARNING

Warnings
3A1184A 5
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.
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 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.
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, 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

Component Identification
63A1184A
Component Identification
ti14791a ti14790a
EF
ti16142a
A
B
C
D
A Power switch Turns sprayer ON and OFF
BFuse 20AMP
C Pressure Control Knob Adjusts pressure. Turn clockwise to increase pressure and
counterclockwise to decrease pressure.
D Prime/Pressure (PR) Relief Valve Primes pump and relieves pressure from gun, hose and tip.
E Prime/Pressure (PR) Relief Valve Open
Position
Relieves pressure from gun, hose and tip and primes the unit
when in the open position. Valve is in open position when there
is a wider gap between valve handle and cam body.
Refer to Pressure Relief Procedure page 7
F Prime/Pressure (PR) Relief Valve
Closed Position
Pressurizes system when closed. Valve is in closed position
when there is a slight gap between valve handle and cam body.

Operation
3A1184A 7
Operation
Pressure Relief Procedure
1. Engage the gun trigger lock. Refer to the separate
instruction manual provided with gun for safety fea-
tures and how to engage the trigger lock.
2. Turn the unit off.
3. Disengage the gun trigger lock and trigger the gun
to relieve residual fluid pressure.
Hold metal part of the gun in contact with
grounded metal pail. Use minimum pressure.
4. Turn Prime/Pressure Relief Valve (PR Valve) to the
open (priming) position to relieve residual pressure.
There will be a wider gap between valve handle
and cam body when in open position. In the
closed position there is only a very slight gap.
NOTE: The valve handle can move both clockwise and
counter clockwise and can face different directions.
5. Re-engage gun trigger lock and close Prime/Pres-
sure Relief Valve.
If the spray tip or hose is clogged, follow Steps 1
through 5 above. Expect paint to splash into the
bucket while relieving pressure during Step 4.
NOTE: If you suspect that pressure hasn’t been relieved
due to damaged Prime/Pressure Relief Valve, or other
reason, slowly loosen the tip nut or hose coupling to
relieve pressure.
Setup
Connect the hose and gun
1. Remove the plastic cap plug from the outlet and
screw a conductive or grounded 3000 psi spray
hose onto fluid outlet.
2. Connect an airless spray gun to the other end of the
hose. Do not install spray tip.
NOTE: Do not use thread sealer on swivel unions as
they are made to self seal.
To reduce risk of injury, follow this pressure relief pro-
cedure whenever you see this symbol throughout this
manual, Also, perform this procedure whenever you:
•Stopspraying
• Check or repair any part of this system
• Install or clean spray nozzle
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• To reduce the risk of static sparking, fire or
explosion which can result in serious bodily injury
and property damage, always ground the sprayer
and system components and the object being
sprayed, as instructed in the safety warning section
of this manual.
• Ensure electrical service is 120 VAC, 15 amp
minimum and the outlet is properly grounded.
• For generator power, a minimum 7000 watt
generator with a voltage regulation must be used.
ti14790a

Operation
83A1184A
Fill the Packing Nut/Wet Cup
1. Fill the Packing Nut/Wet Cup with 5 drops of Air-
lessco Throat Seal Oil (TSO).
Flush the Sprayer
1. Flush the sprayer. See Flushing Procedure on
page 8.
Prime and Flush Storage Fluid
Before beginning a new spraying project you need to
prime the sprayer and flush the storage fluid out of the
sprayer.
Oil- or Water-based Materials
• When changing from water-based material to oil
based material, flush with soapy water and then
mineral spirits.
• When changing from oil based material to water
base material, flush with mineral spirits, followed by
soapy water, then a clean water flush.
• When flushing with solvents, ground pail and gun.
• Flush before changing colors, before fluid can dry in
the equipment, at the end of the day, before storing,
and before repairing equipment.
Flushing
1. Make sure the gun trigger lock in engaged and there
is no spray tip in the gun. Refer to the separate
instruction manual provided with gun for safety fea-
tures and how to engage the trigger lock.
2. Pour enough clean, compatible solvent into a large,
empty metal pail to fill the pump and hoses.
3. Place the suction tube into the pail or place the pail
under the pump.
4. Turn Pressure Control Knob to low.
5. Open the prime valve to the open - “Priming Posi-
tion”. This will allow an easy start.
6. Turn the engine ON/OFF switch to ON.
NOTICE
The equipment was tested with lightweight oil,
which is left in the fluid passages to protect parts.
To avoid contaminating your fluid with oil, flush the
equipment with a compatible solvent before using
the equipment for the first time.
• To reduce the risk of static sparking, which can
cause fire or explosion, always hold a metal part of
the gun firmly against the metal pail when flushing.
This also reduces splashing.
• Always remove the spray tip before flushing.
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High Pressure
ti14790a ti14791a
Closed
(Pressure)
Open
(Priming and Pressure Relief)
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Operation
3A1184A 9
7. Point the gun into the metal pail and hold a metal
part of the gun firmly against the pail. Maintain firm
metal to metal contact between gun and container.
8. Disengage the gun trigger lock and squeeze the
trigger. At the same time, slowly turn the pressure
control knob clockwise, just enough to move liquid
at low pressure.
9. Allow the pump to operate until clean solvent comes
from the gun.
10. Release the trigger and engage the gun trigger lock.
11. If you are going to start spraying, place the pump or
suction tube into the supply container. Release the
gun trigger lock and trigger the gun into another
empty, metal container, holding a metal part of the
gun firmly against the metal pail, forcing the solvent
from the pump and hose. When paint starts coming
from gun, turn pressure control knob to minimum
pressure, place prime valve in prime (open) position
and engage the gun trigger lock.
12. If you are going to store the sprayer, remove the
suction tube or pump from the solvent pail, force the
solvent from the pump and hose. Engage the gun
trigger lock. See Storage, 10.
13. Whenever shutting down the sprayer, follow Pres-
sure Relief Procedure, page 7.
Startup
1. Prepare the material according to the material man-
ufacturer’s recommendations.
2. Place the suction tube into the material container.
3. Start the sprayer.
a. Prime/PR Valve must be “OPEN” in the prim-
ing position.
b. After ensuring the gun trigger lock is engaged,
attach tip and safety guard.
c. Turn the engine ON/OFF switch to the “ON”
position.
d. Turn the Pressure Control Knob clockwise to
prime the pump.
e. After the pump is primed, turn the Prime/PR
Valve to the “CLOSED” position.
f. Turn Pressure Control Knob to the desired
spray pressure.
g. Disengage the gun trigger lock to begin spray-
ing.
Adjusting the Pressure
When adjusting the pressure, turn the Pressure Control
Knob clockwise to increase pressure and counterclock-
wise to decrease pressure. Always use the lowest pres-
sure necessary to completely atomize the material. If
more coverage is needed, use a larger tip rather than
increasing the pressure.
NOTE: Operating the sprayer at higher pressure than
needed wastes material, causes early tip wear, and
shortens sprayer life.
NOTE: Check the spray pattern. The tip size and angle
determines the pattern width and flow rate.
NOTICE
To prevent damage and freezing during storage,
never leave water in the fluid pump
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• To reduce the risk of injection, never hold your
hand, body, fingers or hand in a rag in front of the
spray tip when cleaning or checking for a cleared
tip. Always point the gun toward the ground or into
a waste container when checking to see if the tip is
cleared or when using a self cleaning tip.
• When you spray into the paint bucket, always use
the lowest spray pressure and maintain firm metal
to metal contact between the gun and container.
• To stop the unit in an emergency, turn the engine
off. Then relieve the fluid pressure in the pump and
hose. See Pressure Relief Procedure, page 7

Operation
10 3A1184A
Shutdown
1. Relieve Pressure, page 7.
2. Clean the tip and gun as recommended in the sepa-
rate Gun Manual supplied with the gun.
3. If spraying water-based material or a material that
could harden in the sprayer overnight, flush the
sprayer after use. See Flushing, page 8.
Storage
Short Term
1. Flush sprayer with compatible solvent before stor-
ing, then fill the pump and hoses with an oil based
solvent such as mineral spirits or Graco or Airlessco
Pump Armor.
• For oil base paint: flush with mineral spirits
• For water-base paint: flush with water, then min-
eral spirits and leave the pump, hose and gun
filled with mineral spirits.
Long Term
For longer storage, use Graco or Airlessco Pump Armor.
Shut off sprayer, Relieve Pressure, page 7, and make
sure prime valve is left open.
Start Up After Storage
Before using water-base paint, flush sprayer with soapy
water and then a clean water flush. When using oil-base
paint, flush out the mineral spirits with the material to be
sprayed.
NOTE: Always store unit indoors.

Maintenance
3A1184A 11
Maintenance
Regular Maintenance
1. Always stop the pump at the bottom of its stroke
when you take a break or at the end of the day. This
helps keep material from drying on the rod, damag-
ing the packings.
2. Keep displacement pump packing nut/wet cup 1/3
full of Airlessco Throat Seal Oil at all times. The
TSO helps protect the packings and rod.
3. Lubricate Connecting Rod Pin every 3 months.
Daily Maintenance
Inspect the packing nut daily. If seepage of paint into the
packing nut and/or movement of the piston upward is
found (while not spraying), the packing nut should be
tightened just enough to stop leakage. Overtightening
will damage the packings and reduce the packing life.
Oil and Lubrication Instructions
Electric Motor Maintenance
Lubrication
The motor is supplied with pre-lubricated ball bearings,
lubricated for the life of the bearing.
Motor Brushes
Motor brushes need periodic inspection and replace-
ment as wear indicates. Standard Leeson brushes have
an initial length of 1 and 1/4” and should be replaced
when they are worn to a length of 5/8”. Brush wear is
greatly influenced by individual application and it is rec-
ommended that brush wear be checked at early inter-
vals of operation in order to determine future required
inspection.
To change the brushes:
1. Unplug the machine.
2. Remove the cover over the motor.
3. Open the two covers at the rear of the motor.
4. Loosen the screw under the brush.
5. Pull out the wire.
6. Push the brush retainer clip in and withdraw.
7. Remove the worn brushes.
8. Install new brushes in the reverse order.
To increase brush life, new brushes (Part #3301146 for
110 volt) need to have a run in period. After changing
brushes, set the machine for spraying. With a bucket of
Pump Conditioner and water, a 50’ 1/4” airless hose, air-
less gun and tip on unit, open the prime valve and switch
on. The pump will now prime. With pump running in the
prime mode, turn the pressure control knob to high pres-
sure. (The pump has to cycle fast with no pressure in
the pump). Run the pump for 20 minutes and the
brushes will be run in.
Sealed
Bearing
Oil impregnated sleeve - dip in
hot 10W oil when removed
Fill plug- unit has grease in gearbox from factory
and will not require changing. (Grease - PN
301178)
Bleed (Weep Hole)
1 oz. SAE 30W Oi
- semi-annually
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Maintenance
12 3A1184A
Replacement of Belt/Belt
Adjustment
NOTE: The Cog Belt System does not require align-
ment. When upper sheave is placed on motor shaft it is
pushed on until a positive stop is reached. The set
screws are then loctited. The lower pulley is placed on
gearbox and held in place with keyway and snap ring.
The flange on upper sheave holds the belt in alignment
and the belt self aligns on lower pulley eliminating hav-
ing to align.
1. Remove cover from unit.
2. Remove tensioner Assembly. Loosen screws. Move
gearbox forward to allow removal and replacement
of belt.
3. Retighten screws into gearbox until they bottom out.
This will align gearbox correctly.
4. Replace tensioner with bolts and leave loose to
allow adjusting belt tension.
5. Tighten belt. When properly tightened the deflection
play should be 1/4 inch when pushing hard with
thumb. (20 ft/lbs)
NOTE: When placing belt on pulleys and inserting the
tensioner against belt, ensure cogs on belt are engaged
into cogs on pulleys before tightening belts. Rotating
upper pulley while holding the tensioner against the belt
will allow proper engagement of cogs prior to tightening.
Servicing the Fluid Pump
NOTE: Before disassembling the sprayer refer to Trou-
bleshooting to try and resolve the problem.
Fluid Pump Disconnect
1. Flush out the material you are spraying, if possible.
2. Relieve Pressure, page 7. Stop the pump in the
middle of down stroke.
3. Remove the suction tube and fluid hose (if so
equipped) from the fluid pump.
4. Remove the connecting rod shield from the pump.
5. Remove two retaining rings (6), slip the sleeve of the
coupling down, and remove both coupling halves.
This will disconnect fluid pump from the connecting
rod.
6. Using a 7/8” box wrench, disconnect the high pres-
sure fluid line from the pump.
7. Using a 9/16” wrench, unscrew the two tie rod lock-
nuts.
8. Pull the pump off the tie rods.
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1
2
3
45
67
8
9
10
11
12
13
14
15
16
6
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Maintenance
3A1184A 13
Fluid Pump Reinstall
1. Loosen the packing nut and extend piston rod to
fully up position. Slip sleeve over the piston rod.
2. Insert one of the retaining rings through the packing
nut and rest the sleeve on top of it.
3. Connect the connecting rod with the fluid pump by
installing the coupling halves. Slide sleeve over the
coupling halves and secure with retaining rings.
4. Remove the retaining ring from the packing nut and
insert into coupling halves.
5. Secure the fluid pump housing to the tie rods and
screw locknuts with washers on loosely.
6. Tighten the tie rod locknuts evenly to 30 ft. lb.
NOTE: After all the rod locknuts are tight, the alignment
of both rods should allow easy assembly and disassem-
bly of the coupling. If any binding, loosen and retighten
all the rod locknuts to improve the alignment. Misalign-
ment causes premature wear of seal and packings.
7. Tighten packing nut clockwise until resistance
against the packings can be felt. Turn it one full turn
more.
8. Start the pump and operate it slowly (at low engine
speed) to check the piston rod for binding. Adjust tie
rod lock nuts if necessary to eliminate binding.
9. Prime the unit and run at maximum pressure for
several minutes, then release the pressure and
repeat step 7.
10. Fill the wet cup (packing nut) with five drops of TSO
(Throat Seal Oil).
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Maintenance
14 3A1184A
Servicing Inlet Nut and Outlet Valve
Inlet Valve
1. Using the rod collar tool (865008), unscrew the suc-
tion nut (6), containing suction seat support (5), off
of the fluid body.
2. Remove suction seat (3), O-ring (2), suction ball (1)
and suction ball guide (8) with O-ring (2).
3. Clean all parts and inspect them for wear or dam-
age, replacing parts as needed. Old O-rings (2)
should be replaced with new ones.
NOTE: Suction seat (867574) is reversible.
Piston Outlet Valve
1. Place piston holder in a vise. Slide piston into the
holder and lock in place with a 1/4” dowel.
2. Use a 3/8” allen wrench to unscrew the outlet seat
support (12) from the piston.
3. Remove the outlet seat (11), O-ring (2), outlet ball
(9), and ball guide (8).
4. Inspect outlet ball (9) and seat for wear. Replace as
required.
NOTE: Outlet seat (867575) is reversible.
5. While piston is still locked in the holder, install parts
back into the piston in the following order:
• Ball guide (8)
•Ball(1)
• O-ring (2)
• Outlet Seat (11)
Before reinstalling the outlet seat support (12) apply two
drops of Loctite No. 242 (blue) on the threads and
torque to 20 ft-lbs.
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1
2
3
4
5
6
6
7
8
9
10
11
12
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Maintenance
3A1184A 15
Packing Replacement Procedures
Disassembly of the Fluid Pump
1. Unscrew and remove the packing nut (2).
2. Push the piston rod (1) down through the packings
and out of the pump.
3. Now push the packing removal tool up through the
pump and remove from the top bringing the pack-
ings, spacer (4) and springs along with it, leaving
fluid body (3) empty.
NOTE: Make sure all old packings and glands have
been removed from fluid pump.
4. Clean inside of fluid body (3).
5. Disassemble all parts and clean for reassembly. Dis-
card any old packings. Save the metal upper glands.
Replace metal lower glands with new metal glands
from the packing kit.
NOTE: If the old packing had a metal gland for
(866100), discard and replace with a new plastic one
from packing kit.
6. Lubricate leather (15, 21) packing in lightweight oil
for 10 minutes prior to reassembly.
Reassembly of the Fluid Pump
1. Place lower male gland (16) down on the flat side.
2. Take three of the lower polyethylene V-packings (17)
and two of the leather V-packings (15) and place
onto the male gland (16), with the inverted side
down, in the following order:
• Polyethylene (17)
• Leather (15)
• Polyethylene (17)
• Leather (15)
• Polyethylene (17)
3. Take the female adaptor (18), which is inverted on
both sides, and place it on top of your assembled
lower packings.
4. Follow step 2 with your packings inverted side up.
5. Take the second lower male gland (16) and place it
on top of your assembled packings with rounded
side down.
6. Take assembled glands and packings (13 pieces)
and slide onto the lower half of the piston.
7. Take the spacer (4) and slide over the top of the pis-
ton (it doesn’t matter which direction it sits), falling
onto the lower packings.
8. Take three Belleville Springs (19) and slide over the
top of the piston in the following order:
• First spring - curve facing down
• Second spring - curve facing down
• Third spring - curve facing down
9. Take the upper male gland (20) and place it rounded
side up.
10. Take three upper polyethylene V-packings (22) and
two leather packings (21) and assemble with
inverted side down, on to the male gland (20) in the
following order:
• Polyethylene (22)
• Leather (21)
• Polyethylene (22)
• Leather (21)
• Polyethylene (22)
11. Take upper female gland (23) and place on top of
assembled upper packings with the inverted side
down.
12. Take assembled upper glands and packings (7
pieces) and slide on over the top of the piston, mak-
ing sure inverted sides are down.
13. Take the V-packing holder and replace the white
O-ring (25) and the black O-ring (26) with new ones
from the packing kit.
14. Slide the V-packing holder (24) over the top of the
upper packings so they fit inside.
15. Lubricate inside of the fluid pump body and the out-
side of the packings with a light weight oil.
16. Slide assembly into fluid pump body.
NOTE: To keep packings secured in correct position,
hold the pump body upside down and push the com-
pleted assembly upwards into the pump body. Once
placed inside, tilt pump body back up to keep all pieces
in.

Maintenance
16 3A1184A
17. Thread the packing nut (2) into the top of the fluid
body (3) and tighten hand tight.
18. Take the suction retainer (10) and replace the black
O-ring (26) with a new one from the packing kit.
Replace the suction ball (11) with a new one from
the kit into the suction retainer (10). Place the suc-
tion seat (13) into the flat side of the ball guide (6),
over the suction ball (11). Now place the white
O-ring (25) into the groove around the suction seat
(13).
19. Take the completed suction valve assembly and
place it into the bottom of the fluid body (3), with the
rounded side fitting inside.
20. Take the suction seat support (12) and place the flat
side down on to the suction valve assembly (threads
will be facing upwards).
21. Thread the suction nut, over the suction seat sup-
port (12).
22. Tighten the packing nut (2) (utilizing the packing nut
adjustment tool) clockwise one full turn.
1
22
19
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ti16001a
ti16002a

Maintenance
3A1184A 17
Pressure Control Assembly Calibration
NOTE: Anytime a sensor or pressure control assembly
(board) or both are replaced, the following calibrations
must be performed.
NOTE: Pressure control assemblies (boards) are now
being equipped with a green grounding wire attached.
Connect the grounding wire to terminal box using the
same screw that holds the grounding wire from the
power cord.
Zero Calibration
1. Place prime/pressure relief valve in the prime (open)
position.
2. Set the pressure control knob to the minimum set-
ting (CCW).
3. Remove the screws and lower the pressure control
assembly.
4. Remove any jumper on the “P-ZR” terminal.
NOTE: This jumper is no longer used.
5. Turn machine “ON” and ensure it is not cycling.
6. If the yellow light on the electrical board is ON and
you have “0000” on the LCD display, the Zero Cali-
bration is complete no further adjustment is neces-
sary. If the light is ON and there are numbers on the
display, use an insulated screwdriver to turn the
“ZERO” trimpot counter-clockwise until the light
goes out. Then turn it clockwise until the yellow light
comes on, continue to turn the trimpot and the num-
bers will reduce until the LCD shows “0000”. The
Zero Calibration is now complete. If you adjust
beyond “0000”. The Zero Calibration is now com-
plete. If you adjust beyond “0000” the numbers will
start to increase.
If the digital display shows “---” and no yellow light,
you should turn the Zero trimpot clockwise until the
yellow light is on, continue turning until “0000” is
shown.
The goal is to see the “0000” on the digital display,
this is when you have Zero Calibration (Relying on
the yellow light is no longer used.)
Pressure Calibration
1. Complete the ZERO calibration, as per “ZERO CAL-
IBRATION” prior to commencing this calibration.
2. Attach a 50’, 1/4” airless hose, airless gun with
0.017 tip and a 5000 psi glycerin filled pressure
gauge to pump.
3. Place the suction tube into a bucket of Pump Condi-
tioner and water.
4. Turn prime/pressure relief valve to the prime (open)
position.
5. Turn pressure control knob clockwise until machine
starts to prime.
6. Place the prime/pressure relief valve in the pressure
(closed) position.
7. While watching pressure gauge, slowly adjust the
pressure trimpot (clockwise to increase and counter
clockwise to decrease) until the maximum static
pressure is 3000 psi, with the pressure control knob
fully clockwise. Trigger the gun several times to
ensure pressure returns to 3000 psi.
LCD Display Calibration
If so equipped
1. Complete the “ZERO CALIBRATION” and “PRES-
SURE CALIBRATION” procedures prior to com-
mencing this calibration.
2. Turn pressure control knob up until system pressure
is above 2500 psi (as indicated on the glycerin filled
pressure gauge) and the machine is not cycling.
3. Use an insulated screwdriver to adjust the Set trim-
pot. Turn trimpot CCW until it clicks, then adjust to
match pressure against pressure gauge reading.
4. Move the pressure control knob to different settings
and trigger the gun several times to ensure that the
LCD continues to match the pressure gauge read-
ing.

Maintenance
18 3A1184A
Phase Limit Calibration
Formerly known as the low voltage or master voltage
calibration.
1. Attach a 50’, 1/4” airless hose, airless gun with .017
tip and a 5000 psi glycerin filled pressure gauge to
the pump.
2. Place the suction tube into a bucket of Pump Condi-
tioner.
3. Turn pump on and turn up pressure control until the
machine starts to prime.
4. Place the prime/pressure relief valve in the pressure
(closed) position.
5. Pressurize pump to 600 psi.
6. Trigger the gun several times noting the deadband
(the amount of pressure drop before the pump
rebuilds to set pressure).
7. If deadband is greater than 150 psi, adjust the
phase limit trimpot so that the deadband is less than
150 psi and the pressure increase after the gun trig-
ger is released is less than 250 psi. These pres-
sures are guidelines and may vary slightly from
pump to pump.
8. Reattach pressure control assembly to unit.
Replacement of Electrical
Components
NOTE: Anytime the pressure control assembly, sensor,
or both are replaced, perform the calibrations.
Pressure Control Assembly (Electrical
Control Board)
1. Unplug machine’s power cord.
2. Remove eight screws and lower the pressure con-
trol assembly.
3. Disconnect all leads from pressure control assem-
bly.
4. Reassemble in reverse order.
Sensor
1. Remove the screws and lower the pressure control
assembly.
2. Disconnect sensor lead from the board.
3. Unscrew sensor from pressure control assembly
using a 7/8” wrench.
4. Reassemble in reverse order. Use PTFE tape on the
sensor threads prior to reinstalling it into the pres-
sure control assembly.
Potentiometer
1. Lower pressure control assembly as described
above.
2. Disconnect potentiometer lead from pressure con-
trol assembly.
3. Use a 1/16” allen wrench, loosen set screw in the
poteniometer knob and remove knob and spacer.
4. Using a 1/2” wrench or deep socket, remove the nut
from the potentiometer shaft assembly.
5. Pull entire potentiometer assembly out of the frame.
6. Replace in reverse order.
On-Off Toggle Switch
1. Lower the pressure control assembly as described
above.
2. Disconnect the two wires on the toggle switch.
3. Use a 9/16” wrench to loosen the nut on the toggle
switch shaft.
4. Reassemble in reverse order.
Circuit Breaker
1. Lower pressure control assembly as described
above.
2. Disconnect the two wires on the holder.
3. Unscrew rubber boot from breaker shaft.
4. Use a 1/2” wrench to remove the bushing from the
breaker shaft.
5. Remove breaker from frame.
Always unplug the electrical cord before servicing the
machine.

Maintenance
3A1184A 19
Liquid Crystal Display (LCD)
1. Ensure the power switch is OFF and the machine is
unplugged.
2. Detach the pressure control assembly from the
frame by unscrewing the eight screws.
3. Disconnect the LCD lead from the pressure control
assembly.
4. Separate the LCD assembly from the frame by
undoing the four screws.
5. Remove and replace LCD Display.
6. Reassemble in reverse order.
NOTE: Do not over tighten the screw and nuts. This can
warp the LCD and damage it.
7. Perform LCD Calibration Procedure, page 17.

Troubleshooting
20 3A1184A
Troubleshooting
General
Problem Cause Solution
Unit doesn’t prime Airleak due to loose suction nut Tighten suction nut.
Airleak due to worn o-rings Replace o-ring (110636) on suction seat and
o-ring (867390) below suction seat.
Stuck or fouled balls Service inlet and outlet valves.
Prime/Pressure Relief valve not
opening
Clean or replace Prime Valve (866428)
Unit primes but has poor or no
pressure
Pressure set too low Turn up pressure.
Filter(s) are clogged Clean or replace gun filter, inlet filter, and/or
manifold filter.
Outlet valve fouled/worn. Service outlet valve.
Prime/pressure relief valve
bypassing
Clean or replace prime valve (866428).
Packings and/or piston worn Tighten packing nut, repack unit.
Unit does not maintain good
spraying pressure
Blown spray tip Replace spray tip.
Packings and/or pistons worn Repack unit.
Upper seat worn Replace upper seat.
Unit does not run See Machine Does Not Start
Machine does not start Control Settings Make sure machine is plugged into the wall.
Verify the on-off switch is in the ON position
and the pressure control knob is turned all the
way to the right (clockwise for maximum pres-
sure).
Circuit Breaker Use multi-meter to test the breaker for continu-
ity or replace with a new breaker. If breaker
reads good, see Power Source.