Tapered Roller Bearing 31306

Tapered roller bearings are used where a bearing assembly must simultaneously transfer both radial and axial loads. In the Kranzle pressure washer motor, bearing 40103 supports the shaft and maintains its correct axial alignment during operation under load.

Application

Bearing 40103 is installed in the bearing assembly of the Kranzle pressure washer motor. The tapered type is characterised by rollers positioned at an angle to the axis of rotation - this allows it to transfer both radial forces from the shaft mass and drive components, and axial forces generated during operation.

Symptoms - When to Replace

• Noise from the motor bearing assembly - humming, crunching, or whining that increases with rotational speed.
• Elevated motor housing temperature in the area of the bearing assembly after a short period of operation.
• Noticeable radial or axial shaft play when checked by hand after disassembly.
• Visible spalling, signs of corrosion, or seizure marks on the raceway or rollers after bearing removal.
• Motor vibrations not caused by rotor condition or drive accessory imbalance.

How to Select the Correct Part

The basis for selection is reference number 40103 - this is a Kranzle catalogue part identifying the specific tapered roller bearing for the motor. When replacing, verify the condition of the seat in the motor housing and the shaft journal - damaged seating surfaces will shorten the service life of the new bearing. If the dimensions of the removed bearing are unavailable, base the selection solely on reference number 40103.

Compatibility

Kranzle catalogue part. Used among others in Kranzle pressure washer motors requiring tapered roller bearing 40103. Verify compatibility with a specific model using the reference number or the motor service diagram.

[faq]

How to identify that motor noise originates from the bearings rather than the rotor or drive components?|Bearing noise is continuous and increases with rotational speed - a uniform hum or crunch throughout the entire operating period. Noise from the rotor or drive components often changes in character depending on load, not only on speed. The most reliable diagnosis is to rotate the shaft by hand after disassembly - a worn tapered roller bearing will noticeably crunch or show radial play that is not attributable to normal operating clearance.

Can grease contamination in the bearing cause failure even without overloading?|Yes. Tapered roller bearings are particularly sensitive to grease contamination with water or metal particles - both factors accelerate raceway corrosion and roller wear. In pressure washer motors, an additional risk is moisture condensation during work and standstill cycles. If the removed bearing shows signs of corrosion, check the integrity of the shaft oil seals.

[/faq]