Joannes 203103 motor-to-oil-pump coupling for AZ 3 burner

The Joannes 203103 is a plastic drive coupling that connects the FHP electric motor to the oil pump of an oil burner.

The coupling transfers rotation from the electric-motor shaft to the oil-pump drive shaft, allowing fuel oil to be supplied to the burner. It is intended to replace a worn, cracked, deformed or damaged original coupling.

The coupling with article number 203103 is suitable for the following Joannes oil burners:

AZ 2.9
AZ 2.9/L
AZ 2.9 PR
AZ 2.9 PR/L
AZ 3
AZ 3/L
AZ 3 PR
AZ 3 PR/L
AZ 4
AZ 4 PR
AZ 8
AZ 10
AZ 14
AZ 14/LP
AZ 14/2
AZ 14/2 LP
AZ 20
AZ 20/L
AZ 20/2
AZ 20/2 L

The FHP designation refers to the motor and does not identify the manufacturer of the plastic coupling itself. The replacement part is correctly identified as a Joannes coupling with article number 203103.

Important: For correct selection, check article number 203103, the burner model, coupling height, both diameters and the shape of the drive ends.

Technical specifications

Burner manufacturer: Joannes
Replacement-part number: 203103
Exploded-diagram position: 137
Italian description: Giunto per pompa motore FHP
Product type: plastic drive coupling
Application: connection between the electric motor and oil pump
Outer diameter: approximately 11 mm
Inner-section diameter: approximately 9 mm
Height: approximately 21 mm
Material: plastic