Brass leak-off ring 14mm AZ

The 14 mm brass (leakage) ring for the AZ pump is a service component working in the pump’s sealing area, linked to controlling seal operating conditions and drainage in the “leakage” zone. In workshop practice, the ring is replaced during AZ pump refurbishment when the condition of the mating surfaces affects the stability of the sealing assembly.

MPN / reference: 43053
Reference dimension: Ø 14 mm

APPLICATION

The ring is used in typical pump service work:

• refurbishment of the sealing assembly in the AZ pump,
• replacement of an intermediate component in the “leakage” zone during pump overhaul,
• restoring correct seating and cooperation of the seals,
• servicing heavily used pumps where brass components in the sealing zone wear over time.

SYMPTOMS - WHEN IT’S WORTH REPLACING

Consider replacing the ring when you notice:

• recurring sealing issues in the sealing zone,
• wear marks, scratches, or pitting on mating surfaces,
• deformation or mechanical damage after disassembly,
• unstable operation of the sealing assembly after reassembly,
• issues returning despite replacing the seals themselves (after other causes have been ruled out).

HOW TO CHOOSE THE RIGHT PART

Selection should be unambiguous:

• confirm it is intended for the AZ pump and is the “leakage” ring type,
• verify the manufacturer number: MPN 43053,
• check the reference dimension Ø 14 mm and compare geometry with the removed part,
• base selection on the pump service documentation.

In the sealing zone, profile and fit matter - parts with similar diameters can differ in details and may not be interchangeable.

COMPATIBILITY

Select the ring based on MPN 43053 and compatibility with the AZ pump. The Ø 14 mm parameter is a dimensional hint, but the key identifiers are the manufacturer number and comparison with the removed component.

[faq]

Is the 14 mm leakage ring a “critical” part, or can it be omitted during an overhaul?|It’s best not to omit it. If it’s worn, new seals may operate under worse conditions and start leaking quickly. In the sealing zone, the condition of brass components genuinely matters.

What are typical types of damage to the brass ring in an AZ pump?|Most often scratches and wear on the contact surface, sometimes localized pitting. Such damage worsens cooperation with the seals and can cause recurring issues after reassembly.

Can the 14 mm ring for AZ look similar to rings from other pumps?|Yes, but a similar appearance does not guarantee compatibility. Geometry, profile, and fit to the specific assembly matter. That’s why MPN 43053 and comparison with the removed part are the basis.

What should I check in the AZ pump if leaks return despite replacing the ring?|Check the seal seats, mating surfaces, guides, and the condition of the remaining seals. The problem can be multi-factor and involve several components at once.

Is Ø 14 mm enough for a certain match?|No. It’s a helper parameter. The most reliable selection is by MPN 43053, plus comparing geometry with the removed part and the pump documentation.

[/faq]