Brass Ring 15 mm

The 15 mm brass bushing ring for Kränzle AP pumps is a service component used in the working section of a high-pressure pump, where it supports proper guidance and cooperation of moving parts. Replacement may be required during pump refurbishment when play, uneven operation, or accelerated seal wear appears.

MPN / reference: 42.905
Weight: 0.04 kg
Dimensions / size: 3×0.8×3

APPLICATION

Part used in AP pump service work such as:

• refurbishing the pump section after prolonged operation,
• replacing guiding components when play or uneven operation occurs,
• repairs after secondary damage (e.g., worn seals accelerating guide wear),
• inspections and repairs performed in pressure washer service centers.

SYMPTOMS - WHEN IT’S WORTH REPLACING

Typical symptoms indicating bushing/ring wear:

• noticeable play in the pump working section after disassembly,
• uneven/“rough” pump operation or unusual noises from the pump section,
• seals wearing prematurely shortly after replacement,
• reduced pressure stability under load (after ruling out accessories),
• visible wear marks/scratches on cooperating surfaces.

HOW TO CHOOSE THE RIGHT PART

Selection should be based on technical data - similarly named parts may differ in diameter and tolerance:

• by manufacturer MPN / reference: 42.905,
• by parameters and measurement: confirm the working size (15 mm) and match to the removed part,
• by comparison with the removed component: check diameters and the condition of cooperating surfaces.

Accurate fit affects not only pump operation, but also the service life of seals and plungers.

COMPATIBILITY

Described as fitting AP pumps and indicated for service use in units such as: K 2195 TS, K 2195 TST, Profi-Jet B 10/200, Quadro 9/170 TST.
For safe selection, confirm compatibility by MPN 42.905 and the pump documentation (parts table/specification) or by comparison with the removed component - do not rely only on the model name.

[faq]

Does this 15 mm bushing fit every Kränzle AP pump?|Not always. “15 mm” can be shorthand, and fit also depends on the design variant and the part reference. The safest approach is selecting by MPN 42.905 and the pump documentation.
How can I tell the bushing/ring is the issue, not just the seals?|If the problem returns quickly after seal replacement and you see play or wear marks on guiding parts after disassembly, the bushing can be the cause of secondary seal wear. Also check the condition of the cooperating surfaces.
Can an aftermarket replacement be used for this bushing?|It can be considered only with identical dimensions and tolerances and confirmed suitability for a high-pressure pump. Incorrect guide selection can accelerate wear of seals and working parts, so the MPN and technical data should be the reference point.

[/faq]