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The J6300-3708100A Clutch Slave Cylinder is a genuine OEM hydraulic actuator manufactured by SINOTRUK Homan for heavy‑duty manual transmission trucks. This precision‑engineered cylinder converts hydraulic pressure from the clutch master cylinder into mechanical force to disengage the clutch, enabling smooth gear changes and reducing driver fatigue. For guaranteed compatibility and performance, always choose genuine Sinotruk Homan parts. The J6300-3708100A clutch slave cylinder is a direct replacement for the original factory unit in HOWO, A7, T7H, C7H, and other SINOTRUK heavy trucks, replicating the correct bore size, stroke, and mounting configuration.
This hydraulic slave cylinder features a cast aluminum body, a corrosion‑resistant steel piston, and high‑temperature seals. It is designed with an integral bleed screw for easy hydraulic system bleeding and a pushrod that is adjustable (or pre‑set) to match the clutch fork geometry. The J6300-3708100A operates reliably under extreme pressures (up to 12 MPa) and temperatures ranging from -40°C to +120°C, ensuring consistent clutch disengagement even in the harshest environments.
A leaking or seized clutch slave cylinder makes gear shifting difficult or impossible, leading to drivetrain damage and roadside breakdowns. Replacing a faulty cylinder with the genuine SINOTRUK Homan J6300-3708100A restores the original hydraulic performance, provides a firm, consistent pedal feel, and protects the clutch release bearing and fork from premature wear.
| Parameter | Specification |
|---|---|
| OEM Number | J6300-3708100A |
| Brand | SINOTRUK Homan (Genuine OEM) |
| Product Type | Clutch Slave Cylinder / Clutch Release Cylinder (Hydraulic) |
| Body Material | Cast aluminum anodized finish (corrosion resistant) |
| Bore Diameter\, | 28.58 mm (1.125 inches) standard for heavy trucks |
| Stroke\, | 35 mm ±1 mm |
| Maximum Hydraulic Pressure\, | 12 MPa (1,740 psi) |
| Port Thread\, | M12 × 1.0 (inlet) + integrated bleed screw (M8 × 1.0) |
| Pushrod Type\, | Adjustable (locknut) or fixed length – pre‑set to factory specification |
| Seal Material\, | Nitrile rubber (NBR) with anti‑extrusion ring, resistant to DOT 3/4 brake fluid |
| Operating Temperature Range\, | -40°C to +120°C |
| Mounting Type\, | Two‑bolt flange (M8 bolts, 60 mm center distance) |
| Fluid Compatibility\, | DOT 3, DOT 4, or DOT 5.1 brake fluid (mineral oil not allowed) |
| Certifications\, | ISO 9001:2024, IATF 16949, E‑mark (ECE R13) |
| Compatible Models\, | SINOTRUK HOWO, A7, T7H, C7H, and other heavy trucks with 10‑16L engines and manual transmissions |
The J6300-3708100A Clutch Slave Cylinder is a key component of the hydraulic clutch system. When the driver presses the clutch pedal, the master cylinder sends pressurized brake fluid to the slave cylinder. The slave cylinder’s piston moves outward, pushing the clutch fork and releasing the clutch pressure plate. This disconnects the engine from the transmission, allowing a gear change.
In heavy trucks with powerful engines, the clutch requires significant force to disengage. The hydraulic system multiplies the driver’s leg effort, making the pedal feel light and consistent. The genuine SINOTRUK Homan slave cylinder is precisely matched to the master cylinder bore ratio and the clutch fork leverage, ensuring the correct release travel without over‑stroking the clutch.
A failing slave cylinder often leaks fluid internally (bypassing the piston seal) or externally (through the pushrod boot). This reduces hydraulic pressure, causing the clutch to drag (difficult shifting) or slip (if the release bearing remains engaged). Replacing a faulty unit with the genuine J6300-3708100A restores full hydraulic function, protects the release bearing, and prevents costly clutch pack damage.
Each J6300-3708100A clutch slave cylinder is manufactured in an IATF 16949 certified facility. The aluminum body is high‑pressure die‑cast, then machined to a surface finish of Ra ≤ 0.4 μm on the bore to ensure smooth piston movement and long seal life. The piston is made from hardened carbon steel with a zinc‑nickel coating to resist corrosion.
The seals are produced from a specially formulated NBR compound that is compatible with DOT 3, DOT 4, and DOT 5.1 brake fluids and retains its elasticity over a wide temperature range. Each cylinder is 100% leak‑tested at 15 MPa (double the working pressure) for 60 seconds, with no detectable drop. The pushrod stroke is verified by a linear transducer to ensure it falls within the specified range.
Counterfeit slave cylinders often use porous castings that weep fluid, or cheap rubber seals that swell and fail within months. The genuine J6300-3708100A is marked with the SINOTRUK Homan logo, a batch code, and the E‑mark approval symbol. Using a genuine part is the only guarantee of safe, reliable clutch operation.
To replace the clutch slave cylinder J6300-3708100A, first support the vehicle safely and locate the cylinder on the bellhousing. Disconnect the hydraulic line and remove the two mounting bolts. Clean the mounting surface; if the old cylinder was leaking, check the clutch housing for fluid contamination.
Install the new cylinder with new copper washers (supplied). Torque the mounting bolts to 25 Nm. Reconnect the hydraulic line and tighten to 15 Nm. Fill the master cylinder reservoir with fresh DOT 4 brake fluid. Bleed the system by opening the slave cylinder bleed screw while an assistant pumps the clutch pedal, then closing the screw before the pedal is released. Repeat until a solid stream of fluid (no air bubbles) exits.
After bleeding, check the pedal free play (should be 5‑10 mm). If the pedal feels spongy, repeat the bleeding procedure. Do not drive the truck before confirming proper clutch disengagement (shift into gear with the engine running – there should be no grinding). The genuine J6300-3708100A will provide a firm, consistent pedal feel immediately after bleeding.
Aftermarket slave cylinders often have incorrect bore diameters, leading to too little clutch release (hard shifting) or too much stroke (damage to the clutch diaphragm spring). The genuine J6300-3708100A is dimensionally identical to the original, ensuring correct travel and release force.
Counterfeit cylinders may use sub‑standard cast aluminum that cracks under pressure, causing sudden fluid loss and complete clutch failure. The genuine SINOTRUK Homan cylinder is pressure‑tested to 15 MPa, well above the system’s maximum working pressure. Additionally, the pushrod on genuine parts is hardened to resist wear; aftermarket versions often wear out, creating excessive free play.
SINOTRUK Homan offers a 12‑month warranty against manufacturing defects. Using genuine parts protects your clutch, transmission, and vehicle safety. Don’t risk a roadside breakdown – install the genuine J6300-3708100A clutch slave cylinder.
Common signs that the J6300-3708100A needs replacement include: clutch pedal goes to the floor with little resistance, difficulty shifting gears (especially reverse), clutch dragging (vehicle creeps with pedal fully depressed), visible fluid leaks near the bellhousing, and the clutch fluid reservoir level dropping without external leaks on the master cylinder.
Preventive replacement is recommended every 500,000 km (300,000 miles) or when the clutch is replaced. The slave cylinder is exposed to heat from the engine and clutch, which degrades the rubber seals over time. Replacing it proactively avoids the labor cost of a second disassembly if it fails soon after a clutch job.
Keep a genuine J6300-3708100A slave cylinder in your spare parts inventory for fleet trucks. A sudden failure can leave the truck undrivable, costing hours of roadside service. Investing in a genuine replacement ensures long‑term reliability.
The J6300-3708100A Clutch Slave Cylinder is stocked in SINOTRUK Homan regional warehouses worldwide (North America, Europe, Middle East, Asia). Standard air freight delivers within 3‑7 business days. Expedited shipping (1‑2 days) is available for urgent repairs. Bulk orders (5+ units) receive volume discounts and can be shipped via sea freight.
Each cylinder is supplied in a sealed plastic bag inside a reinforced carton, including mounting bolts and copper washers. For large fleets, consignment stock programs are available to ensure immediate availability and reduced downtime. Don’t let a leaking slave cylinder disable your truck’s drivetrain.
Order the genuine SINOTRUK Homan J6300-3708100A Clutch Slave Cylinder today and restore smooth, reliable gear shifts to your heavy truck. This cylinder is a critical component for clutch operation in HOWO, A7, T7H, and C7H models. Keep a spare in your service inventory, and always replace with genuine SINOTRUK Homan parts.
Upgrade your truck’s drivetrain reliability with the SINOTRUK Homan genuine clutch slave cylinder. Engineered for leak‑free performance and long life – order now and experience the quality that keeps your driver shifting smoothly.
Summary: The SINOTRUK Homan Clutch Slave Cylinder (OEM J6300-3708100A) delivers precise hydraulic actuation, reliable sealing, and long service life. Choose genuine for consistent clutch performance and maximum uptime.
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