Solo 425 - User Manual

Operator’s Manual & Parts List
425, 425-HD, 425-L, 425-PAF, 475, 475-3N1, 475-PAF, 435, 478, 485,
473-P, 473-D, 473-ECS; includes Deluxe and Heavy Duty Models
US9425739 (02-12)
CUSTOMER SERVICE COMMITMENT FROM SOLO’S SERVICE DEPARTMENT
In the event the sprayer you have purchased has missing or damaged parts, please call 1-800-765-6462, 9:00 AM - 5:00 PM EST.
In order to assist your service representative, please have the following information available: sprayer model number,
part description and part number. A parts list is included in your operator’s manual.
Solo is committed to your satisfaction and is continuing its efforts to earn your future business.
Visit us on the web at www.solousa.com
Troubleshooting and parts ordering available on-line.
WARRANTY:
Solo backpack sprayers are covered by Solo’s 1-YEAR LIMITED WARRANTY. Solo manufactured parts which fail due to defective
material or workmanship will be repaired or replaced without charge. See page 5 for full details and complete warranty information.
MAINTENANCE TIP: The cap gasket (#4061345)is prelubricated for
improved sealing. Occasional lubrication with Solo Superior Grease (#9850-P) or
petroleum jelly is recommended.
SAFETY PRECAUTIONS:
1. Before using sprayer with chemicals, fill sprayer with fresh water to assure
that you have it properly assembled; pressurize and practice spraying.
Also, check for any leaks at this time. When thoroughly familiar with the
sprayer operation, follow normal operating procedures.
2. Ensure all pressure in the sprayer is relieved by locking the shut-off
valve in the open position.
3. Avoid contact with chemicals.
4. Always wear rubber gloves, safety goggles and appropriate
protective clothing.
5. Work in a well ventilated area.
6. Individuals should be trained in the proper use of this sprayer, chemical handling procedures, and first aid/emergency
care. Where training is not available, individuals should study and follow the procedures detailed in this manual.
WARNING:
Chemicals can be harmful to individuals and the environment if improperly used. In addition, some chemicals are caustic, corrosive or
poisonous and should be avoided. Read warnings and chemical manufacturers’ instructions. Solo high density polyethylene sprayers are
fitted with chemical resistant seals which are compatible to a wide variety of agricultural and household chemicals; however, care should be
exercised to ensure that sprayer components are clean, functioning properly, and in a good state of repair before and during use.
If in doubt about a particular chemical, check with the manufacturer. If you suspect or observe indications that the material may be
unsafe in a Solo sprayer...STOP. DO NOT USE OR APPLY CHEMICAL. ALWAYS WEAR RUBBER GLOVES, GOGGLES, AND
APPROPRIATE PROTECTIVE CLOTHING!
Read and follow operating instructions.
Do not fill with, use, or spray flammable materials.
Do not modify sprayer.
Never spray in the direction of humans, animals or property which might be injured or damaged by spray formula.
Do not use disinfectants, solvents or impregnating agents unless first tested to ensure they are not harmful to the
environment or sprayer.
Do not use liquids with a temperature above 110°F (43°C).
Wear appropriate protective clothing to prevent contact with chemical agents.
Rinse and clean sprayer thoroughly after using. Disposal of contaminated rinse should be in accordance with applicable
ordinances. Observe the precautionary instructions of the chemical manufacturer.
Do not use any acid (including citrus) or caustic chemicals. For bleach solutions, try our Solo 475-3N1.
Remember that a sprayer with liquid is a significant amount of weight (8 lbs. per gallon). Do not climb when wearing
the sprayer. Use caution when bending, leaning or walking. Bend at the knees rather than the waist.
During sprayer operation, the pressure cylinder (#4400240) contains compressed air and liquid. Compressed air
and liquid under pressure are inherently dangerous. Before making adjustments on sprayers fitted with a pressure
regulating valve assembly (#4800182) located on the pressure cylinder or any other repair or inspection of any
sprayer, be sure to relieve pressure through the shut-off valve and wand.
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Piston Diaphragm
STOP!
If you are missing parts, instructions or have questions, DO NOT take this unit back to the store. Call
1-800-SOLO-INC (1-800-765-6462). Solo will send the missing parts/information to you promptly.

Summary

Warranty Information

Maintenance Tip

Safety Precautions

General Safety Warnings

Key safety instructions including avoiding flammable materials, modifications, and spraying direction.

Assembly and Disassembly

Nozzle Removal and Reinstallation

Instructions for removing and reinstalling the plastic adjustable nozzle assembly.

Wand Assembly

Steps for assembling the wand to the shut-off valve.

Pump Lever and Handle Installation

Guides for installing the pump lever and the fold-away pump handle.

Shoulder Strap Attachment

How to attach the shoulder straps to the sprayer frame.

Pressure Regulation

Sprayer Filling

Operating Features

Nozzle Tip Specifications Overview

Details on various nozzle types, their order numbers, spray volume, pressure, and applications.

Spray Tip Assembly Guide

Spraying Operation

Wettable Powders Handling

Cleaning Procedures

Sprayer Cleaning Steps

Steps for cleaning the sprayer, including flushing with soapy water and proper disposal.

Maintenance and Storage

Storage Recommendations

Tips for storing the sprayer away from sunlight and preparing it for winter.

General Maintenance Tips

Advice on lubrication, checking parts, and avoiding wear for sprayer longevity.

Solo Limited Warranty Details

Warranty Coverage Periods

Details the warranty periods for consumer and commercial use, including tank coverage.

Owners Responsibilities for Warranty

Requirements for obtaining warranty service, including proof of purchase and maintenance.

Warranty Exclusions

Exclusions from the limited warranty, such as consequential damages and normal wear.

Available Accessories

Spare Parts List

Special Parts and Accessories List

List of special parts and accessories not shown in the main parts list, including conversion kits.

Piston Pump Repair Instructions

Piston Pump Repair Kit Installation

Step-by-step guide for installing the piston pump repair kit, including part replacement.

Diaphragm Pump Repair Instructions

Diaphragm Pump Repair Kit Installation

Detailed instructions for installing the diaphragm pump repair kit, covering disassembly and reassembly.

Nozzle Tip Specifications

Solo 425 Specifications

General

Brand	Solo
Model	425
Category	Paint Sprayer
Language	English