Cam 13,0

Cam 4102813 with an angle of 13.0°, made of aluminium, is a drive component of the Kranzle pressure washer pump in the 41028 series. 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 13.0° 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 Kranzle pump for which the 41028 series and 13.0° angle are specified. With each shaft rotation, the cam, set at a 13.0° angle, moves the pistons via the thrust bearing resting against its surface. The 13.0° angle determines piston stroke, and through that, the flow rate and pressure characteristics of the pump. The aluminium body is a design feature of this series.

Replaced during cam assembly repair – after identifying wear on the cam surface, damage to the thrust bearing, or as part of a comprehensive 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 or in the bearing pack.
• Damage to the thrust bearing combined with signs of heating on the cam – bearing seizure frequently causes secondary damage to the cam surface.
• Corrosion or mechanical damage to the aluminium body – particularly at points of contact with the steel components of the bearing pack in the presence of moisture.

How to select the right part

Identify by reference number 4102813 and the 13.0° angle. The 41028 series numbering encodes the angle in the last digits: 41028+13 corresponds to a 13.0° angle – allowing cross-verification when the marking on the cam itself is illegible.

The exact installation position (washer model) is not available in the current data – before ordering, confirm the reference number on the removed cam or in the service documentation for the specific model. If documentation is unavailable, the nameplate of the washer with the full model number will allow the correct cam to be identified from the Kranzle catalogue.

Cam 4102813 (13.0°, 41028 series) is not a substitute for cam 405231275 (12.75°, AQ series) or any other cam with a similar angle from a different series – despite the apparently close angle values.

During disassembly, assess the condition of the bearing pack at the same time – both components work together and wear over a similar timeframe.

Compatibility

41028 series cam for Kranzle pressure washer pumps, angle 13.0°, aluminium body. Pump model – verify by reference number 4102813 on the removed component or in service documentation. Not a substitute for cams from the AQ series (40523), quadro/Profi series (40460/40473) or other 41028 series components with different angles.

[faq]

The 13.0° angle is close to the 12.75° of the AQ cam (405231275) – does the 0.25° difference have a real impact on selection?|Yes – and in two ways. First, a 0.25° angle difference at the same shaft speed translates into a measurable difference in piston stroke and pump flow rate. Second, and more importantly, both cams belong to different series (41028 vs 40523) and fit different pump models – their shaft mounting geometry and mating dimensions may differ independently of the angle. Proximity of angles alone is not a sufficient interchangeability criterion. Always select by the reference number specific to the pump series.

How to identify early cam wear before noticeable vibration appears?|During disassembly of the bearing pack, examine the cam race in raking light – early aluminium wear appears as a dull, slightly concave surface at the bearing contact point, before distinct scoring or material loss develops. Check the thrust bearing rotation by hand – resistance or grating indicates damage to one of the components. Also assess the contact between the aluminium and steel components for galvanic corrosion if there are signs of moisture in the pump housing.

When replacing cam 4102813, must the bearing pack be replaced if it shows no obvious damage?|There is no such requirement – if the bearing rotates smoothly, without grating or noticeable play, it can be retained. In practice, after extended use or when replacing following vibration, both components are usually in a similar state of wear – replacing only the cam with a worn bearing will shorten the service life of the new cam. With the cam assembly already open, the cost of replacing the bearing pack is incomparably lower than the cost of a second disassembly a few months later.

[/faq]