Parts Number CCT6 Gearbox Control Valve Forklift Control Valve

Forklift Gearbox Control Valve CCT6 Transmission Parts

The gearbox control valve is a precision hydraulic component within the forklift transmission valve body that regulates clutch pack engagement pressure and shift timing for smooth gear changes under load. The CCT6 model is a widely used transmission control valve specified for Chinese-manufactured forklifts including HELI, Hangcha, and TCM models in the 2-5 ton range with automatic or powershift transmissions. A sticking, worn, or leaking control valve causes harsh gear engagement, delayed shifting, transmission fluid overheating, and accelerated clutch plate wear — all leading to expensive transmission repairs and equipment downtime.

Each valve is precision-machined from alloy steel with hardened and ground spool lands that maintain tight running clearance within the valve body bore for accurate pressure metering. The calibrated spring assembly is matched to OEM shift-point specifications, ensuring consistent clutch apply and release timing across the full operating temperature range. High-temperature O-ring seals maintain hydraulic integrity in transmission fluid at continuous operating temperatures. Quality control includes spool leak-down testing and shift-point pressure verification.

This CCT6 control valve is compatible with HELI CPC/CPD 2-5T, Hangcha CPCD 2-5T, TCM FD25-50, Komatsu FD25-50, and various Chinese-manufactured forklifts using powershift or automatic transmissions. For fleet maintenance operations, keeping a spare CCT6 valve on hand minimizes transmission service downtime. Installation requires valve body removal and cleaning, correct gasket placement, and transmission fluid replacement with the appropriate grade — always torque valve body bolts in the correct sequence to prevent warping.

Kingstream supplies OEM-grade transmission components with pressure testing and dimensional inspection. Browse our drive axle parts for transmission valves, torque converters, clutch packs, and complete transmission assemblies. Worldwide shipping available.

Technical Specifications

• Part Number: CCT6
• Product Type: Gearbox / Transmission Control Valve
• Material: Precision-machined alloy steel
• Seal Type: High-temperature O-ring
• Application: Forklift powershift / automatic transmission valve body

Compatible Forklift Models

Restore smooth gear shifting and eliminate clutch slippage. This gearbox control valve CCT6 ships from stock with pressure test verification. Worldwide delivery from Kingstream.