Clutch Release Bearing for Sinotruk HOWO SITRAK A7 G5X TX T7H T5G TH7 C7H C9H G7 X7 Truck Spare Parts

Core Function and Working Principle

The release bearing is located between the clutch pressure plate and the transmission input shaft. Its function is to transmit pedal force to separate the pressure plate from the flywheel, thereby interrupting power transmission and making gear shifting possible. For the "pull-type" bearings commonly used by Sinotruk (such as WG9725160510), when the pedal is depressed, the internal metal nut of the bearing is pulled inward, driving the bearing seat to slide outward and "pull" the pressure plate apart to achieve disengagement.

Material and Structural Features

Material Selection

• High-carbon alloy steel: Subjected to high-temperature quenching and tempering, providing high tensile strength and wear resistance to withstand the enormous impact force during clutch engagement.

• Bearing steel: Used for high-precision components to reduce friction and noise.

• Sealing and lubrication: Some models are equipped with labyrinth seals to prevent dust and moisture ingress; the interior is filled with grease to reduce friction and wear between metal parts.

Key Designs

• Self-aligning structure: Some Sinotruk bearings adopt a self-aligning design that can absorb the rotational center deviation between the diaphragm spring and the bearing when the bearing starts to rotate, suppressing abnormal heat generation and wear on the contact surface.

• Stamped outer ring: Some models use steel plate stamped bearing rings, which help reduce vehicle weight and lower fuel consumption.

Performance Focus of Different Part Numbers

According to parts supplier information, different part numbers have different performance positioning:

• WG9925160550: Reportedly used for SITRAK, HOWO T7H and other models equipped with MAN-technology MC11/MC13 high-power engines, emphasizing high-speed and high-torque impact resistance.

• WG9725160510: Positioned as a classic model, used for HOWO, A7, Steyr and other earlier or mainstream models.

Usage and Maintenance Points

• Avoid continuous contact: When the clutch is engaged (pedal released), the bearing should not contact the diaphragm spring. If insufficient free play causes the bearing to rotate continuously, it will accelerate wear and may cause clutch slipping.

• Replacement recommendation: When replacing the release bearing, it is recommended to simultaneously inspect the clutch pressure plate, driven disc, and release fork, and replace the complete set if necessary to avoid repeated transmission removal and installation.

• Distinguish models: Sinotruk pull-type bearings come in different specifications such as "pull-type small hole (70CT)" and "pull-type large hole (86CT)". Using the wrong one may cause clutch sticking or difficult operation.

Note: The above performance descriptions come mostly from commercial parts websites and export channels and are of limited authority. For actual selection and maintenance, the actual vehicle VIN and the original bearing number should be used as the basis, and verification should be made through Sinotruk original parts channels.