Part Number: MKC 15/28-GR
Category: Pressure Washer Pumps → Gear Drive Pumps → Industrial Pressure Washer Pumps
Type: BKC 15/30-GR Gear Drive Pressure Washer Pump – 4.0 GPM 4000 PSI Hollow Shaft

The BKC 15/30-GR Gear Drive Pressure Washer Pump (Model #MKC 15/28-GR) is a genuine OEM heavy-duty triplex plunger pump engineered for professional commercial and industrial pressure washing applications. Manufactured by Udor, this gear-driven pump delivers 4.0 GPM at 4,000 PSI, making it ideal for contractors, fleet washing, construction equipment, agriculture, municipalities, manufacturing facilities, and other demanding continuous-duty cleaning operations.

Image shown for illustrative purposes only

Key Features & Benefits

• Genuine Udor OEM gear drive pressure washer pump
• Model: MKC 15/28-GR
• Heavy-duty triplex plunger design
• Gear-driven pump for continuous-duty operation
• Delivers up to 4.0 GPM at 4,000 PSI
• Low-speed 1,450 RPM operation for extended service life
• Hollow shaft configuration (specify shaft size when ordering)
• Compatible with power units up to 16 GHP
• Equipped with UD-28 high-pressure seals
• Features UD-30 valve assemblies
• Smooth, efficient operation with reduced vibration
• OEM-quality construction for commercial and industrial applications

Technical Specifications

Model: MKC 15/28-GR

Manufacturer: Udor

Product Type: Gear Drive Triplex Pressure Washer Pump

Maximum Flow Rate: 4.0 GPM

Maximum Pressure: 4,000 PSI

Maximum Pump Speed: 1,450 RPM

Gas Horsepower (GHP): 16

Shaft Type: Hollow Shaft (Specify Size)

Seal Type: UD-28

Valve Type: UD-30

Drive Style: Gear Drive

OEM Replacement: Yes

Compatible Applications

Designed for demanding pressure washer systems including:

• Gear-drive pressure washer systems
• Commercial pressure washers
• Industrial pressure washers
• Fleet washing equipment
• Agricultural sprayers and cleaning systems
• Construction equipment cleaning
• Municipal wash-down equipment
• Manufacturing facilities
• Continuous-duty industrial cleaning
• OEM equipment installations

Always verify the required hollow shaft size, mounting configuration, horsepower requirements, and pressure/flow specifications before ordering.

Function of the Pressure Washer Pump

The MKC 15/28-GR pump helps:

• Deliver up to 4.0 GPM of water flow
• Generate operating pressures up to 4,000 PSI
• Provide reliable commercial and industrial cleaning performance
• Operate efficiently at low pump speeds
• Reduce heat buildup, vibration, and internal wear
• Maximize equipment uptime and pump longevity

Its heavy-duty gear-drive triplex design provides exceptional durability and dependable performance in demanding professional cleaning environments.

Common Signs Replacement Is Needed

Replace the pump if you notice:

• Reduced operating pressure
• Decreased water flow
• Water or oil leaks
• Excessive operating noise
• Damaged seals or valve assemblies
• Cracked or damaged pump housing
• Excessive internal wear
• Pump failure during operation

Replacing a worn pump restores cleaning performance while minimizing costly downtime.

Installation & Service Notes

• Shut down the pressure washer and disconnect the engine before servicing.
• Relieve all system pressure.
• Verify compatibility with the required hollow shaft size, gear-drive configuration, horsepower requirements, and plumbing connections.
• Install the pump according to Udor's installation specifications.
• Ensure proper alignment between the pump and gear-drive system.
• Fill the crankcase with the recommended pump oil before operation.
• Prime the pump with water before startup.
• Verify proper operation and inspect for leaks after installation.

Important: Never operate the pump without an adequate water supply. Running the pump dry can quickly damage the plungers, seals, valves, and other internal components, significantly reducing pump service life.

Maintenance Recommendations

• Check the pump oil level regularly and change the oil according to Udor maintenance schedules.
• Inspect the UD-28 seals and UD-30 valve assemblies during routine maintenance.
• Maintain clean, filtered inlet water to reduce internal wear.
• Inspect the gear-drive system for proper alignment and lubrication.
• Flush the pump after use when pumping dirty or corrosive water.
• Use only genuine OEM Udor replacement parts and approved lubricants to maintain optimum pump performance, reliability, and long service life.