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SINOTRUK SACHS VALEO ZF Clutch release bearing assembly WG9725160510 WG9925160550 AZ992116003001 AZ992516003001 6395 6392 WG9925160623
WG9725160510 is a classic clutch release bearing used in early and mainstream heavy-duty truck models from Sinotruk, such as the HOWO, HOWO A7, and Steyr series.
WG9925160550 is used in the clutch systems of models such as SITRAK and HOWO T7H-specifically those equipped with high-horsepower engines (such as the MAN-technology MC11/MC13)-and offers superior resistance to high rotational speeds and high-torque shock loads.
AZ992116003001 features a SACHS-style design and is a pull-type clutch pressure plate widely compatible with vehicle models such as the Shandeka C7H and HOWO A7.
AZ992516003001 is primarily used in the drivetrain systems of HOWO T5G and SITRAK series heavy-duty trucks.
WG9925160623 corresponds to Valeo or ZF automatic/manual transmission systems; it is primarily used in heavy-duty trucks-such as the Sitrak C7H (540 hp) and Howo T7H-equipped with ZF transmissions or AMT (Automated Manual Transmission) systems.
Common Signs of Release Bearing Damage and Diagnosis
1. No noise is heard while idling in neutral, but a distinct grinding or piercing squealing sound occurs when the clutch pedal is lightly depressed.
Cause: The high-temperature grease inside the bearing has dried up or leaked out, causing dry friction between the steel balls and the raceway; alternatively, a failed dust seal has allowed external dust to score the raceway.
2. The clutch feels unsmooth when depressed, exhibiting a "stepped" sensation or a risk of sticking.
Cause: Typically, a lack of lubrication or the coking of oil residues between the release bearing's inner bore and the transmission input shaft guide sleeve (input shaft cover) causes the bearing to bind during movement.
3. The vehicle suddenly cannot be shifted into any gear; forced shifting produces violent gear-grinding noises, and the clutch pedal feels abnormally heavy.
Cause: The bearing has completely seized or disintegrated due to high temperatures, preventing the clutch pressure plate from being properly disengaged; consequently, the clutch remains in a state of partial engagement or cannot disengage at all.
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