Sharpe Cobalt HVLP Technical manual

SHARPE MANUFACTURING COMPANY • P.O. BOX 1441, MINNEAPOLIS, MN 55440-1441
1-800- 742-7731, www.sharpe1.com
310799B, 4/2006
THE SPRAY GUN PEOPLE
FOR PRODUCT INFORMATION CALL:
1-800-742-7731
Cobalt HVLP
Siphon/Pressure Feed Spray Gun
Maximum Air and Fluid Inlet Pressure:100 psi (0.7 MPa, 7 bar)
Maximum HVLP Compliant Air Pressure:
Part No. 5860, 5862, 5863, 5864, 5865 - 50 psi (345 kPa, 3.4 bar)
Part No. 5866 - 40 psi (276 kPa, 2.8 bar)
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
II 2 G

2 310799B
2 Year Limited Warranty
Sharpe warrants this product to the original user against defective material or workmanship for a period of 1 year from the date of
purchase.
Sharpe reserves the right to determine whether the part or parts failed because of defective material, workmanship, or other causes.
Failures caused by accident, alteration, or misuse are not covered by this warranty.
Sharpe, at its discretion, will repair or replace products covered under this warranty free of charge. Repairs or replacements of products
covered under this warranty are warranted for the remainder of the original warranty period.
Sharpe or its authorized service representatives must perform all warranty repairs. Any repair to the product by unauthorized service
representatives voids this warranty. The rights under this warranty are limited to the original user and may not be transferred to
subsequent owners.
This warranty is in lieu of all other warranties, expressed or implied, including warranties of merchantability and fitness for a particular
purpose. Some states do not allow the exclusion or limitations of incidental or consequential damages, so the above limitations may not
apply to you.
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 lights on or off when flammable fumes are present.
•Ground equipment and conductive objects in work area.
•If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment until you identify and
correct the problem.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
•Do not exceed the maximum working pressure or temperature rating of the lowest rated system component. See Tech-
nical 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.
•Check equipment daily. Repair or replace worn or damaged parts immediately.
•Do not alter or modify equipment.
•Use equipment only for its intended purpose. Call your Graco distributor for information.
•Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
•Do not use hoses to pull equipment.
•Keep children and animals away from work area.
•Comply with all applicable safety regulations.
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.
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 equip-
ment includes but is not limited to:
•Protective eyewear
•Clothing and respirator as recommended by the fluid and solvent manufacturer
•Gloves
•Hearing protection
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.

3 310799B
COBALT HVLP SIPHON/PRESSURE FEED SPRAY GUN
Setup
•Check that your shop air provides adequate air flow.
•Use a minimum 3/8 in. ID air supply hose.
•Set shop air pressure regulator (not supplied) according to
paint manufacturer’s recommendation for. See maximum
pressures and compliant air pressures on cover.
•Make sure no air restrictions, such as low-volume cheater-
valves, obstruct the air flow. If an air adjusting valve is
desired, use a SHARPE Air Adjusting Valve 24AAV (part
no. 2210), 36AAV-HOV (part no. 3310) or HOV (part no.
U04410).
•Install a shutoff valve (not supplied) downstream of the air
regulator to shut off gun air.
•Install an inline air filter (not supplied) to clean and dry the
air supply to the gun.
1. Shut off air supply.
2. Connect a clean, dry, filtered air supply to the gun air inlet
(9). See FIG. 1, page 4.
3. If this is first time using the equipment, flush the spray gun.
Operation
Pressure Relief Procedure
1. Turn off gun air supply.
2. Trigger the gun to relieve pressure.
Flushing
Flush before using the equipment, before changing colors, and
when you are done spraying. Use solvent that is compatible with
gun wetted parts and fluid that will be sprayed. Flush at lowest
possible pressure.
1. Follow Pressure Relief Procedure.
2. Dispose of any paint in cup.
3. Fill cup with small amount of solvent.
4. Spray into grounded metal waste container until equipment
is clean.
5. Follow Pressure Relief Procedure.
Spraying
1. Fill cup with material and connect to gun fluid inlet (37) or
connect fluid supply hose if pressure feeding gun. See FIG.
1, page 4.
2. Turn on shop air to gun and set atomizing pressure with the
gun fully triggered.
3. Adjust the pattern size and shape with the spray width
adjustment knob (17). Turn knob clockwise to reduce pattern
size and counterclockwise to increase it.
4. Fluid control knob (15) is factory set for maximum needle
trigger travel and material flow. To decrease needle/trigger
travel and decrease fluid flow, turn the knob clockwise.
WARNING
Follow Pressure Relief Procedure when you stop spraying
and before cleaning, checking, or servicing equipment. Read
warnings, page 2.
WARNING
Read warnings, page 2.
Refer to Compliant Cleaning Methods, page 4, to com-
ply with air quality laws if applicable.
CAUTION
Excessive atomizing air pressure can increase over-spray,
reduce transfer efficiency, result in a poor quality finish
from dry spray.
Regulatory agencies in certain states prohibit the operation
of a spray gun above 10 psi (69 kPa, .7 bar) atomizing air
cap pressure.
See Troubleshooting guide if you experience an irregular
pattern.

4 310799B
COBALT HVLP SIPHON/PRESSURE FEED SPRAY GUN
Cleaning and Maintenance
Volatile Organic Compounds (VOC)
Regulation
In certain states, spraying solvents that release VOC’s into the
atmosphere when cleaning a spray gun is prohibited. To comply
with these air quality laws you must use a cleaning method that
prevents the escape of VOC vapors into the atmosphere. See
Compliant Cleaning Methods below.
Compliant Cleaning Methods
•Place spray gun in a gun washer that completely encloses
the gun and components during cleaning, rinsing, and
draining.
•Spray solvent through the spray gun into a closed gun
cleaning station.
Cleaning Gun and Cup
1. Follow Flushing procedure, page 3.
2. Use a rag moistened in solvent to wipe cup lid, fluid tube,
inside of cup, and outside of gun.
3. Blow dry gun inside and out. Lubricate gun - see Spray Gun
Maintenance.
Cleaning Nozzle and Air Cap
To clean the air cap and nozzle, remove and soak
them in a compatible cleaning solution. Clean them
and front of gun with a soft-bristle brush dipped
into compatible solvent. Do not use a wire brush or
metal tools. To clean out air cap holes, use a soft
implement, such as a toothpick.
Spray Gun Maintenance
•Frequently lubricate the gun moving parts with a drop of
non-silicone oil (part no. 8255).
•Do not disassemble the spray gun if you are having a spray
pattern problem. Check Troubleshooting, page 5, for infor-
mation on how to correct the problem.
•Check for fluid leakage. Tighten fittings or replace equip-
ment as needed.
Technical Data
Maximum Air Inlet Pressure: 100 psi (0.7 MPa, 7 bar)
Maximum HVLP Compliant Air Pressure: see front cover
(delivers 10 psi (69 kPa, 0.7 bar) spraying pressure at air cap)
Air Consumption: 13.9 CFM at 50 psi (345 kPa, 3.4 bar)
Wetted Parts: stainless steel, carbon steel, aluminum, brass,
nylon, low density polyethylene
Spray Gun
•1/4 npsm (R1/4-19) air inlet
•3/8 npsm (R3/8-19) fluid inlet
WARNING
Follow Pressure Relief Procedure when you stop spraying
and before cleaning, checking, or servicing equipment. Read
warnings, page 2.
CAUTION
•Do not submerge gun in solvent. Solvent dissolves lubri-
cant, dries out packings, and may clog air passages.
•Do not use metal tools to clean air cap holes as this may
scratch them and distort the spray pattern.
•Use a compatible solvent.
•Gun can be cleaned in a gun washer.
Clean air line filters as directed by the manufacturer.
Refer to Compliant Cleaning Methods to comply with air
quality laws if applicable.
CAUTION
•Trigger gun and use nozzle removal tool 41160 whenever
you tighten or remove nozzle to avoid damaging needle
seat and nozzle.
•Do not use metal tools to clean air cap holes as this may
scratch them and distort the spray pattern.
FIG. 1
37
9
17
15
Lube

5 310799B
COBALT HVLP SIPHON/PRESSURE FEED SPRAY GUN
Troubleshooting
WARNING
Follow Pressure Relief Procedure, page 3, before troubleshooting or servicing. Read warnings, page 2.
Problem Cause Solution
Normal pattern No action necessary
Dirty or damaged air cap or fluid nozzle. Rotate air cap 180°.
If pattern follows air cap, problem is in air cap. Clean and
inspect. See page 4. If pattern is not corrected, replace air
cap.
If pattern does not follow the air cap, the problem is with the
fluid nozzle. Clean and inspect the nozzle. See page 4. If the
pattern is not corrected, replace nozzle.
Pressure too high for viscosity of material
being sprayed.
a. Reduce air pressure.
b. Increase material viscosity
c. Correct pattern by narrowing fan size with spray width
adjustment knob.
Dirty or distorted air horn holes. Rotate air cap 180°.
If pattern follows air cap, problem is in air cap. Clean and
inspect. See page 4. If pattern is not corrected, replace air
cap.
Will not spray. a. Cup is not tight a. Tighten cup.
b. Cup or fluid supply empty. b. Fill.
c. Fluid adjustment knob (15) turned too far
clockwise.
c. Adjust knob (15) to the counterclockwise.
a. Fluid pressure too high for viscosity of
material being sprayed.
a. Reduce air pressure.
b. Air pressure too low. b. Increase fluid pressure.
c. Gun held too close to surface. c. Hold gun about 6-8 inches (150-200 mm) from surface.
Right
Wrong
Heavy top or
bottom pattern
Wrong
Split pattern
Wrong
Wrong
Heavy pattern or
orange peel

SHARPE MANUFACTURING COMPANY • P.O. BOX 1441, MINNEAPOLIS, MN 55440-1441
1-800- 742-7731, www.sharpe1.com
310799B, 4/2006
COBALT HVLP SIPHON/PRESSURE FEED SPRAY GUN
Parts
19 12
30*
31 32 33*
34*
35, 36
37
7* 8
16a*
2a 2d* 2c* 2b*
2
2f*2e*
16b 16c
17
16
10
4*
REF 12
1513
9
6
14* 18
8
1
11
Gun Accessory Tools
Part No. 41160: 1/2 in. Nozzle Removal Tool
Part No. 41150: Nozzle Cleaning Brush
Ref.
No. Part No. Description Qty.
1 28156 Gun Handle, HVLP 1
2 26016 Air Valve Assembly
Includes items 2a-2f
1
2a 26032 •Packing Nut 1
2b* 25066 •Air Valve 1
2c* 16151 •Housing 1
2d* 16162 •Packing
2e* 16167 •Air Valve Spring 1
2f* 16163 •Gasket 1
3 10333 Trigger Screw 1
4 16163 Gasket 1
6 26042 Trigger 1
7* 26044 Trigger Shaft 1
8 26054 Pipe Plug 2
9 26055 Air Inlet Fitting 1
10 26056 Fluid Control Bushing 1
11 118524 Pressure Limit Bushing
12 see
table
Needle/Nozzle Set 1
13 16150 Needle Spring 1
14* 10326 Gasket 1
15 25092 Fluid Control Knob 1
16 26018 Width Control Assembly
Includes items 16a-16c
1
16a* 16175 •Retaining Ring 1
16b 38120 •O-Ring 1
16c 26066 •Body 1
17 26065 Control Valve/Knob 1
18 41137 Screw 1
19 see
table
Air Cap 1
30* 16100 Nozzle Gasket 1
31 118531 Gun Head 1
32 34941 Packing 1
33* 26022 Fluid Needle Packing 1
34* 26032 Packing Nut 1
35 27058 Fluid Inlet Gasket 1
36 27076 Fluid Inlet Lock Nut 1
37 26070 Fluid Inlet Fitting 1
* Parts included in Repair Kit 28140.
Gun
Part No.
Needle/
Nozzle Size
Air Cap
Part No.
Needle/
Nozzle
Part No.
5860 0.8 mm 27001 118533
5862 1.2 mm 27001 118534
5863 1.6 mm 27001 118535
5864 1.4 mm 27001 118536
5865 1.8 mm 27001 118537
5866 2.2 mm 27003 118538
Ref.
No. Part No. Description Qt
y