Cartridge GT4294 452229-0002 452235-0009 DAF Truck

What is/causes Shaft Play?  
Shaft play is caused by the bearings in the center section of the turbo wearing out over time. When a bearing is worn, shaft play, a side to side wiggling motion of the shaft occurs. This in turn causes the shaft to scrape against the inside of the turbo and often produces a high-pitched whine or whizzing noise. This is a potentially serious condition that can lead to internal damage or complete failure of the turbine wheel or the turbo itself

What are the advantages of turbocharger?
To improve engine power. In the case of constant engine displacement charge density can be increased, so that the engine can be more fuel injection, thereby increasing engine power, after installation of the booster engine power and torque to be increased by 20% to 30%. On the contrary, at the request of the same power output can reduce engine bore and narrow engine size and weight.

Why is a KP31/35/39 360° thrust bearing better than a KP31/35/39 180° thrust bearing?
In newer OE turbo applications, the 180 degree design has now been phased out and replaced with the 360 degree design. This has resulted in better oil pressure and lubrication. We only use the 360 degree thrust bearing design in all BV35, BV39, KP35 & KP39 CHRA / Core Assemblies, giving the turbo longer life. A breakdown of the oil film will cause premature failure of the bearing system, often with no obvious signs of lack of lubrication or oil contamination.