Plunger 15mm L-98,7mm

The 15 mm plunger (piston) is a working component of a high-pressure pump, responsible for pressure generation and proper operation of the pump section. In service applications, it is replaced when the working surface is worn, mechanically damaged, or during complete pump refurbishment.

MPN / reference: 42908
Dimensions / size: 1.5 × 9.5 × 1.5 cm

APPLICATION

Used in service work on industrial washer pumps, including:

• replacing the plunger/piston in pumps used in X/XA series units,
• refurbishment of the pump working section after long operation,
• repairs after pressure-performance drop and unstable system operation,
• pump overhauls where inspection of cooperating parts shows wear.

SYMPTOMS – WHEN IT’S WORTH REPLACING

Typical signs of plunger wear or damage:

• reduced working pressure and lower output,
• jet pulsation and pressure fluctuations (after ruling out nozzle/valves),
• leaks in the pump section related to accelerated seal wear,
• unusual noise/friction in the pump area,
• scratches, pitting, or working-surface damage found after disassembly.

HOW TO CHOOSE THE RIGHT PART

Selection must be precise, because the component works within tight tolerances:

• by manufacturer MPN / reference: 42908,
• by dimensions: 15 mm diameter and matching length/geometry to the removed part,
• by comparison with the removed component: check diameter, length, and working-surface condition.

Correct fit is critical for pump tightness and durability - wrong selection accelerates seal wear and worsens operating parameters.

COMPATIBILITY

Part described as used, among others, in the X/XA series. For safe selection, confirm compatibility by MPN 42908 and the pump documentation/parts list (spec table). Do not select only by the generic “15 mm” description without reference verification.

[faq]

Does a 15 mm plunger fit every X/XA series pump?|Yes. The safest method is verification by MPN 42908 and comparison with the removed part.
Should pump seals be replaced when replacing the plunger?|In service practice, often yes, because worn seals can shorten new-plunger life and reduce sealing quality. The final decision should follow inspection of seals and guides.
Can I use an aftermarket plunger/piston?|Yes, but only with full match of diameter, length, geometry, and working-surface quality. Tolerances are critical in pump working parts, so the reference point should be the MPN and pump specification.

[/faq]