Part number: 904/50020
Part type: aftermarket
Material: Teflon (PTFE)
Cut type: Scarf Cut
High-quality Teflon piston ring for the clutch pack, designed for manual and Powershift transmissions used in JCB machines. Manufactured with a Scarf Cut design, ensuring excellent sealing, stable oil pressure, and extended service life.
The ring is a critical sealing component of the piston inside the clutch drum. Its function is to maintain hydraulic oil pressure that clamps the friction disc pack, allowing proper engagement of gears or direction changes. Using a premium-quality ring helps prevent pressure loss and protects the entire clutch pack from premature failure.
Backhoe loader
Forklift truck
Wheel loader
Telescopic handler
JCB – backhoe loaders: 2CX, 2DX, 3CX, 4CX
The Teflon ring seals the clutch piston. When worn or cracked, it causes hydraulic pressure loss, leading to improper gearbox operation.
Typical symptoms of ring failure:
gear slipping under load,
loss of drive when the oil is warm,
delayed response when changing direction,
gearbox overheating.
Ignoring these symptoms may result in burnt friction discs and severe damage to the entire clutch pack.
complete clutch piston seal kit,
friction discs and steel separator plates (for a full clutch pack rebuild),
gearbox oil filter,
transmission oil.
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High-quality Teflon piston ring for the clutch pack, designed for manual and Powershift transmissions used in JCB machines

















