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H.E.R.O. INDUSTRIES 300S / 300SL LEGEND Owner’s Manual
3
Table of Contents
Important Safety Precautions 4 – 5
Introduction 6
Operating Instructions 6
Setting up to Spray 7
Flushing The Unit 8
Special Notes 9
Airless Spray Painting Suggestions 10 – 13
Trouble Shooting 14 – 22
Intake Seat Replacement 23
Outgo Valve 24
Bleed Valve Repairs 25
Diaphragm Replacement 26
Hydraulic Head Insert Replacement 27
Piston Repairs 28 – 29
Pressure Control Valve Repairs 30
Accessories 31
Parts List & Description 32 – 36
Exploded Unit Schematics 37 – 38
IMPORTANT
AS WITH ALL MECHANICAL EQUIPMENT, PROPER OPERATING AND MAINTENANCE
PROCEDURES ARE REQUIRED TO KEEP YOUR H.E.R.O. AIRLESS PUMP PERFORMING
TO YOUR SATISFACTION. THE FOLLOWING SAFETY, OPERATING AND MAINTENANCE
INSTRUCTIONS ARE IMPORTANT.
Read and understand this manual completely, especially with regard to all safety precautions. Read and
follow instructions on all warning labels on your equipment. Keep the warning labels clean and readable at
all times. Order new labels from your local distributor or from H.E.R.O. Industries if needed.
The manufacturer shall not be responsible for any loss, damages, or injury of any kind or nature whatsoever
resulting from the use the equipment other than in strict compliance with the instructions, cautions and
warnings contained in this operating and instruction manual and as displayed on the face of the equipment.
This system is capable of producing 2400 psi. ( spray pressure ). To avoid rupture and injury DO NOT
operate this pump with components rated less than 3000 psi. working pressure (including but not limited to
spray guns, hose and connections).
Before servicing, cleaning or removing of any part, shut off power and relieve pressure.