8.754-858.0 for only $48.68 - Steambrite's price on the Legacy Pumps - 8.754-858.0 extractor, Equipmentcarpet cleaning equipment, Equipment flood restoration, Equipment carpet cleaning machine,

Karcher 8.754-858.0 Ceramic Plunger Kit, 16mm - Legacy Shark Pressure Washer Pump Repair

Manufacturer: Karcher
OEM Part Number: 8.754-858.0
Alternate Part Number: 87548580
Product Type: Ceramic Plunger Repair Kit
Plunger Diameter: 16mm
Application: Compatible Karcher, Legacy, Shark, Landa and Hotsy Pressure Washer Pumps
Quantity: Sold Each - One Kit Services One Pump Cylinder

Product Description

The Karcher 8.754-858.0 Ceramic Plunger Kit is a replacement repair kit designed for compatible Karcher, Legacy, Shark, Landa and Hotsy commercial pressure washer pumps utilizing 16mm ceramic plungers.

This repair kit replaces a damaged, cracked, worn or broken ceramic plunger assembly to help restore proper pump operation. Ceramic plungers are essential components of high-pressure triplex pumps, providing a smooth, wear-resistant surface that operates against the pump's high-pressure water seals.

Each kit services one pump cylinder. For a complete three-cylinder plunger replacement, order a quantity of three kits.

Kit Components

Karcher repair kit 8.754-858.0 includes the components required to replace one 16mm ceramic plunger assembly:

• One 16mm ceramic plunger sleeve
• One plunger retaining bolt
• Copper sealing washers/spacers for the plunger assembly

Important: This kit services one cylinder only. Three kits are required when replacing all three ceramic plungers in a compatible triplex pump.

Technical Specifications

Common Symptoms of a Damaged Ceramic Plunger

Ceramic plungers can become cracked, chipped or broken from excessive wear, improper installation, freezing, pump overheating or other mechanical damage.

Common symptoms of a damaged ceramic plunger include:

• Water leaking into the pump crankcase
• Milky or discolored pump oil
• Reduced operating pressure
• Unusual pump vibration or pulsation
• Visible cracks or chips in the ceramic surface
• Premature failure of high-pressure pump seals

If a ceramic plunger breaks, fragments may damage the pump seals, manifold and other internal components. Inspect the pump carefully before installing replacement parts.

Installation and Replacement Recommendations

1. Turn off the pressure washer and completely relieve system pressure.
2. Disconnect the equipment from its power source.
3. Remove the pump manifold according to the manufacturer's service instructions.
4. Inspect the ceramic plungers for cracks, chips and excessive wear.
5. Remove the damaged plunger and associated hardware.
6. Inspect the plunger rod, seals and mating surfaces for damage.
7. Install the replacement components following the manufacturer's service manual.
8. Reassemble the pump using the specified tightening torque.
9. Check pump oil condition and replace contaminated oil as necessary.
10. Test the pump for proper pressure and leaks before returning it to service.

Service Note: A damaged ceramic plunger can also damage the high-pressure water seals. Inspect these seals during repair and replace them when necessary.

Related Karcher Pump Repair Parts

Depending on the pump model, additional repair components may include:

• 8.754-856.0 - 16mm Plunger Seal Kit
• 8.754-857.0 - 16mm Seal Packing Kit
• 8.754-859.0 - Complete Valve Repair Kit
• 9.803-937.0 - Plunger Oil Seal Kit

Repair kit compatibility varies by pump model. Verify the correct repair kit numbers using your pump's exploded parts diagram before ordering.

Manufacturer Parts Diagram and Service Information

Karcher pump service documentation identifies part number 8.754-858.0 as the 16mm plunger repair kit.

View Karcher Pump Parts Diagram and Service Manual (PDF)

Note: The linked manual covers specific pump models. Confirm that your pump model is included before using the illustrated parts diagram.

Frequently Asked Questions

Does Karcher 8.754-858.0 include three ceramic plungers?

No. Each repair kit services one pump cylinder. Order three kits to replace all three ceramic plungers in a compatible triplex pump.

What diameter is the ceramic plunger?

This kit contains a 16mm ceramic plunger. Verify the original plunger diameter before ordering.

Will this kit fit my Shark or Legacy pressure washer?

This kit is used in certain Karcher, Legacy and Shark pressure washer pumps. Compatibility depends on the specific pump model and configuration, not simply the pressure washer brand.

Does this kit include the pump's high-pressure water seals?

No. The high-pressure water seal and packing assemblies are separate service components. Consult your pump's parts diagram to identify the appropriate seal kit.

Can a cracked ceramic plunger cause water in the pump oil?

Yes. A cracked ceramic plunger or damaged pump seals may allow water to enter the crankcase, resulting in milky or discolored pump oil.

Order Karcher 8.754-858.0 Replacement Plunger Kits

Steam-Brite supplies replacement pump parts and repair components for commercial pressure washing equipment.

Order Quantity: One kit per cylinder.
Complete Three-Plunger Replacement: Order quantity three.

Before ordering, verify your pump model and original manufacturer part number to ensure proper compatibility.

Manufacturer part numbers and product specifications are subject to change without notice.

Karcher: Plunger, 16mm -