FULLER O’BRIEN PRO 4030 User Manual

28 pages

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OWNER’S MANUAL

308-526

Rev A

This

manual contains

IMPORTANT

WARNINGS

and

INSTRUCTIONS

READ AND RETAIN FOR REFERENCE

FULLER

O’BRIEN PRO

3515, 4020, 4030

Pressure W

ashers

PRO

3515, 5 HP ENGINE

P/N 800–584, Series A

1500 psi (103 bar) OPERA

TING PRESSURE

1900 psi (131 bar) MAXIMUM WORKING PRESSURE

PRO 4020, 8 HP ENGINE

P/N 800–585, Series A

2000 psi (138 bar) OPERA

TING PRESSURE

2400 psi (165 bar) MAXIMUM WORKING PRESSURE

PRO 4030, 1

1 HP ENGINE

P/N 800–586, Series A

3000 psi (207 bar) OPERA

TING PRESSURE

3400 psi (234 bar) MAXIMUM WORKING PRESSURE



FULLER

O’BRIEN CORPORA

TION, 450 EAST GRAND A

VENUE, SAN FRANCISCO, CA 94080

COPYRIGHT

1990, GRACO INC.

PRO 4030

PRO 3515

PRO 4020

Questions and Answers:

R
Ronald MartinAug 16, 2025
How to fix a FULLER O’BRIEN Pressure Washer engine that won't start?
- S
  Sarah FarmerAug 16, 2025
  If your FULLER O’BRIEN Pressure Washer engine won't start, first, ensure there's gasoline in the fuel tank and the fuel shut-off valve is open. If the tank is full, check the oil level and add more if it's low. Make sure the Start/Stop switch is in the Start position. Also, consider draining the fuel tank and carburetor if there's water in the gasoline or if the fuel is old, and use new fuel and dry the spark plug. If the engine is flooded, clear out the gas by opening the choke and cranking the engine several times. Also, clean or replace a dirty air filter or spark plug. Finally, ensure the spray gun is not closed by triggering it.
G
Glen AliAug 19, 2025
What to do if my FULLER O’BRIEN PRO 4030 Pressure Washer has low pressure and/or the pump runs rough?
- S
  Shannon PrestonAug 19, 2025
  If you notice low pressure or the pump runs roughly on your FULLER O’BRIEN Pressure Washer, it could be due to several reasons. Start by checking the water flow rate to the pump to ensure there is an adequate water supply. Inspect the garden hose for any collapses or kinks that might be restricting the inlet. Clean the inlet filter, inlet and discharge valve assemblies and check the filter for any particles. Replace the high-pressure hose if it's leaking. If the tip is worn or the wrong size, replace it with a tip of the proper size. Replace worn valves and packings. If there's belt slippage, tighten or replace the belts, using correct belts and replacing both at the same time.

FULLER O’BRIEN PRO 4030 Specifications

General

Brand	FULLER O’BRIEN
Model	PRO 4030
Category	Pressure Washer
Language	English

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FULLER O’BRIEN PRO 4030 User Manual

Table of Contents

Questions and Answers:

FULLER O’BRIEN PRO 4030 Specifications

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