Cam 10,8

Cam 40523108 with an angle of 10.8° is a drive component of the Kranzle AQ series pressure washer pump. Mounted on the pump shaft, with a thrust bearing pack underneath it and the pump housing further down. The rotary motion of the motor turns the cam – its 10.8° angle generates the motion transferred through the bearing onto the pump pistons, converting shaft rotation into their reciprocating movement.

Application

The cam is mounted on the shaft of the AQ pump. With each shaft rotation, the cam, set at a 10.8° angle, moves the pistons via the thrust bearing resting against its surface. The 10.8° angle determines piston stroke, and through that, the flow rate and pressure characteristics of the pump. The component operates within the bearing pack, which provides correct seating and axial clearance on the shaft.

Replaced during cam assembly repair – after identifying wear on the cam surface, damage to the thrust bearing, or as part of a comprehensive AQ pump drive overhaul.

Symptoms – when to replace

• Vibration or irregular pump rhythm not caused by piston seals or valves – suggesting wear of the cam working surface or thrust bearing.
• Visible signs of seizure, scoring or dull wear marks at the contact surface between the cam and the bearing.
• Axial play on the shaft with the cam fitted – wear of the component at the mounting position.
• Damage to the thrust bearing of the bearing pack combined with signs of heating on the cam – bearing seizure frequently causes secondary damage to the cam surface.
• Replacement as part of the pack – if one component of the cam assembly shows wear after extended use, the remaining components are usually in a similar condition.

How to select the right part

The 10.8° angle is a relevant parameter, but not sufficient on its own for selection – AQ pumps may have several cam variants with an identical angle, differing for example in drive type (electric vs combustion motor) or shaft mounting geometry. An identical angle does not guarantee interchangeability.

Identify by reference number 40523108. During disassembly, assess the condition of the bearing pack at the same time – these components work together and wear over a similar timeframe. If you are unsure about the pump series (AQ vs quadro/Profi) or drive type – verify on the disassembled machine or in the model documentation before ordering.

Compatibility

Drive component for Kranzle AQ series pressure washer pumps, cam angle 10.8°. Not a substitute for cam 40460108 (10.8° for the quadro/Profi series) – identical angle, different pump series. Verify the exact compatibility range by reference number 40523108.

[faq]

Cam 40523108 and cam 40460108 have an identical 10.8° angle – is this the same part under a different number, or genuinely different components?|These are different components despite the identical angle. The 40460108 numbering corresponds to the quadro/Profi series (scheme 40.460-X.X), while 40523108 has the prefix 40523 – consistent with the numbering of the AQ series (as with the AQ 9.5° cam – 4052395). Different pump series can have different cam-to-shaft mounting geometry, a different bearing pack size or different mating dimensions – the angle alone is not a sufficient interchangeability criterion. Selection should be based on the reference number specific to the pump series.

How to identify early cam wear before noticeable pump vibration appears?|During disassembly of the bearing pack, examine the contact surface between the cam and the bearing in raking light – early wear appears as a dull, slightly uneven surface at the contact point, before visible scoring or wear marks develop. Also check whether the thrust bearing rotates evenly on the cam surface when turned by hand – resistance or grating indicates damage to one of these components. Assess both together, as wear of one accelerates degradation of the other.

Can cam 40523108 be reconditioned by grinding the race, or is replacement necessary?|Grinding the cam race is technically possible, but it alters the cam geometry – particularly at a precisely defined angle of 10.8°. Removing material from the contact surface can change the effective cam angle, and through that, the piston stroke. For a component that determines the operating parameters of the entire pump, reconditioning by grinding is impractical – the tolerances are too tight and the risk of altering the pump characteristic is too high. With a damaged race, replacement with a new cam 40523108 is the safer option.

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