OPERATOR’S MANUAL & PARTS LIST - 425, 475, 425D, 425LC

Oct 23, 2026

Uploaded by Levi

Operator’s manual and parts list for Solo backpack sprayer models 425, 475, 425D, and 425LC, covering warranty terms, key maintenance guidance, and detailed safety precautions for chemical handling and spraying. Includes step-by-step service and assembly instructions such as removing and reinstalling the nozzle components, assembling the wand, installing pump lever hardware (425D, 425LC only), and fold-away pump handle installation (425 & 475 models only). Provides customer service contact details and recommends proper operating practices, leak checks, and safe chemical disposal.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages12

Reading Time30 min

AccessFree to download

Warranty

Maintenance Tip

Safety Precautions

Customer Service Commitment

Removing the Nozzle

Assembly Instructions for Wand

Pump Lever Installation (425D, 425LC Only)

Fold-Away Pump Handle Installation (425 & 475 Models Only)

OPERATOR’S MANUAL & PARTS LIST 425, 475, 425D, 425LC |
STOP | If you are missing parts, instructions or have questions, DO NOT take this unit back to the store. Call 1300 798 022. Solo will send the missing parts/information to you promptly. | | --- | --- | PISTON DIAPHRAGM WARRANTY Solo backpack sprayers are covered by Solo’s WARRANTY (5 years for models 425 & 475, 2 years for Model 425D, 425 LC). Solo manufactured parts which fail due to defective material or workmanship will be repaired or replaced without charge. Refer to Warranty sections for consumer and commercial use, of this Owners Manual, for full details. MAINTENANCE TIP Cap gasket is pre-lubricated for improved sealing. Occasional lubrication is recommended. SAFETY PRECAUTIONS 1. Before using sprayer with chemicals, fill sprayer with freshwater 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. 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 Viton® seals which are resistant 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 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), PETROCHEMICALS OR CAUSTIC CHEMICALS (including bleach). • Remember that a sprayer with liquid is a significant amount of weight (15kg per 15 litres) . Use caution when bending, leaning or walking. Bend at the knees rather than the waist. • During sprayer operation, the pressure cylinder (44 00 240) 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 body (40 74 323) or control knob (40 74 344) 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. CUSTOMER SERVICE COMMITMENT FROM SOLO’S SERVICE DEPARTMENT: In the event the sprayer you have purchased has missing or damaged parts, please call 1300 798 022, 9:00am – 5:00pm Mon-Fri. In order to as

FAQs

What warranty coverage applies to Solo backpack sprayer models 425, 475, 425D, and 425LC?

Models 425 and 475 have a 5-year warranty, while model 425D and 425LC have 2 years. Defective Solo-manufactured parts due to material or workmanship failure will be repaired or replaced without charge.

What safety checks should be done before using chemicals with the sprayer?

Fill the sprayer with freshwater to confirm proper assembly, pressurize, and practice spraying. Check for leaks at that time, and follow normal operating procedures only after you are thoroughly familiar with operation.

How do you remove and reinstall the nozzle?

Unscrew the nozzle cap from the nozzle body (best done while the retaining nut is fastened tightly to the elbow), then unscrew the retaining nut and push the nozzle body out. The filter with gasket comes out with the body; reinstall by reversing the steps.

Oct 23, 2026

Uploaded by Levi