Product Specification

K13C RELEASE BEARING

Color:Customized

Lead Time:30 days

ISO 9001:2015 certification

In the demanding world of concrete transport, smooth and reliable power transfer is non-negotiable. The clutch release bearing is the critical interface between the driver's command and the driveline's response, enduring immense pressure and heat with every gear change. Specifically engineered for heavy-duty applications, our K13C Release Bearing is designed to deliver exceptional durability, consistent performance, and extended service life under the punishing stop-start cycles of mixer truck operation. It is more than a replacement part; it is a precision-engineered component built to restore and enhance the clutch feel and reliability of your equipment.

We manufacture with an uncompromising focus on material integrity, dimensional precision, and performance validation, ensuring every K13C bearing meets the rigorous demands of commercial vehicle service.

1. Product Parameter (specification)

Basic Information

Model: HINO K13C / PROFIA TRUCK

Purpose: The release bearing is primarily used in the clutch system. Its main function is to disengage the clutch when the driver presses the clutch pedal, allowing for smooth gear changes and preventing damage to the transmission system.

Description: CLUTCH BEARING

Refer Parts Number: HK577 / S3123-01100 / HNC539

Material: Commonly made of high - quality alloy steel or bearing - specific steel, which provides excellent wear resistance and fatigue resistance to withstand the high - frequency and high - load operations in the clutch system.

Dimensions: The specific dimensions vary depending on the vehicle model and clutch specifications. However, for the K13C - related applications, the bearing's size is designed to fit precisely within the clutch housing and interact correctly with the other clutch components.

Core Product Specifications & Technical Philosophy

Our manufacturing process is defined by adherence to precise specifications that ensure optimal functionality and longevity in the clutch release system.

Detailed Technical Parameter Analysis & Key Influencing Factors

1. Bearing Core: Load, Speed, and Life Ratings

Dynamic Load Rating (C): This is the most critical parameter, indicating the load the bearing can withstand for a given life (e.g., 1 million revolutions). For a release bearing like the K13C, the dynamic axial load rating is paramount, as it primarily faces axial (thrust) forces from the clutch diaphragm spring. A typical value for this application can range from 15 to 25 kN.

Limiting Speed: The maximum rotational speed the bearing can sustain. While release bearings do not spin continuously, they must handle high input shaft speeds during disengagement. A well-designed K13C will have a limiting speed suitable for diesel engine max RPMs in lower gears.

Key Influencing Factor – Internal Geometry & Material: The load rating is directly determined by the size, number, and profile of the rolling elements (balls or rollers), as well as the hardness and purity of the bearing steel. Our bearings use vacuum-degassed, high-carbon chrome steel (e.g., SAE 52100) for races and elements, heat-treated to a hardness of 58-62 HRC, to maximize this rating.

2. Sleeve/Carrier: The PA66+25%GF Advantage

Dimensional Stability & Heat Resistance: The clutch environment is hot. The 25% glass fiber reinforcement in our PA66 is the decisive factor. It reduces the material's coefficient of thermal expansion by over 50% compared to unfilled polymers. This prevents the sleeve from expanding or distorting under engine bay heat, which could cause binding on the transmission input shaft sleeve and lead to clutch drag or incomplete release.

Wear Resistance: The constant sliding against the clutch fork necessitates extreme wear resistance. The glass fibers dramatically increase the polymer's hardness and abrasion resistance, ensuring consistent clutch fork contact point and smooth operation throughout the bearing's life.

Special Operating Conditions & Emergency Handling Notes

The clutch system in a mixer truck operates under uniquely severe conditions.

High-Frequency, High-Pressure Cycling: Unlike on-highway trucks, mixer operations often involve constant gear changes on site. This leads to exceptional cycle counts. Our K13C bearing is designed for this duty with optimized internal clearance and robust cage design.

Emergency Note: A common symptom of impending bearing failure is a high-pitched squealing or chirping noise when the clutch pedal is depressed (bearing under load). If this noise appears, address it promptly. Continued operation can lead to catastrophic failure, where the bearing seizes or disintegrates, potentially damaging the clutch pressure plate and diaphragm spring fingers, leading to a far more expensive repair.

Exposure to Contaminants: The clutch bellhousing is not a sealed environment. It is exposed to dust, moisture, and occasionally, gear oil or grease.

Prevention: Our bearings feature high-efficiency seals (often 2RS, double rubber shielded) to protect the rolling elements.

Emergency Handling: If the vehicle has been submerged or suffered a major input shaft seal leak, the clutch compartment may be contaminated. Always replace the release bearing as a matter of course during any clutch job following fluid contamination, as the ingress of abrasive particles or corrosive fluids will drastically shorten its life.

Misalignment and Fork Wear: A worn clutch fork or misaligned pivot can cause the bearing to engage at an angle, creating uneven load.

Critical Action: During any clutch replacement, always inspect the clutch fork, pivot ball, and cable/hydraulic linkage. Replacing the K13C bearing without addressing a worn fork is a leading cause of premature repeat failure. Our technical specifications include mating surface tolerances to help identify compatible, unworn components.

Selection and Maintenance Critical Points

Correct selection and disciplined maintenance are the keys to maximizing service life.

Selection Points:

Exact Application Matching: The "K13C" designation is a type/style code. Crucially, you must verify the exact physical dimensions: bore diameter, outer diameter, overall height, and the shape of the contact face that presses against the diaphragm spring fingers. A mismatch of even 1mm in height can cause incomplete clutch disengagement or permanent clutch drag.

Quality Provenance: Insist on bearings from manufacturers with documented quality systems. Our ISO 9001:2015 certification ensures process control, material traceability, and batch testing. Request documentation like a dimensional inspection report.

Seal Configuration: For mixer applications, specify bearings with robust, high-temperature rubber seals (2RS designation). Avoid bearings with simple metal shields (ZZ) in this dirty, demanding environment.

2. Production details