277-4140 Stick / Arm Cylinder Seal Kit for Caterpillar 304C CR 305D CR 305E Excavators

277-4140 Stick / Arm Cylinder Seal Kit for Caterpillar Equipment

Address hydraulic fluid leaks and restore proper stick cylinder pressure with the WINSCHEN 277-4140 Seal Kit. Engineered for Caterpillar mini excavator service applications, this aftermarket seal kit provides the essential sealing components required to rebuild and maintain hydraulic stick / arm cylinder assemblies.

Key Features

Direct Replacement: Manufactured to specific OEM dimensional tolerances, ensuring a seamless fit and straightforward installation as a direct replacement for Caterpillar part number 277-4140.
Industrial Durability: Constructed from fluid-resistant polyurethane and high-grade rubber compounds designed to withstand continuous internal friction, high pressure spikes, and environmental contaminants typical in earthmoving applications.
Cost-Effective Maintenance: A practical aftermarket solution for hydraulic cylinder rebuilding, helping reduce leakage, restore sealing reliability, and minimize equipment downtime.

Compatible Equipment Models

Mini Hydraulic Excavators: 304C CR, 305D CR, 305E Caterpillar

Seal Kit Related Parts

Part No	Qty	Parts name
277-4129	1	SEAL
277-4130	1	SEAL
095-1711	1	SEAL-O-RING
277-4131	1	RING
263-9883	1	RING-BACKUP
095-1710	1	SEAL-O-RING
263-9886	1	SEAL AS
263-9887	1	RING-WEAR
277-4134	4	SEAL
095-1575	1	SEAL-O-RING

Specifications

Part Number	277-4140 (2774140)
Part Type	Stick / Arm Cylinder Seal Kit / Service Kit
Application	Hydraulic Stick / Arm Cylinder Rebuild
Brand	WINSCHEN
Country of Origin	China
SKU	CTC-277-4140
MOQ	1 SET
Delivery Time	1-3 business days

To ensure proper fitment, please verify your machine model and original hydraulic cylinder configuration with our support team prior to purchasing. We offer fast global shipping to keep your heavy machinery operating efficiently.

Related Caterpillar Seal Kit Categories

Browse more Caterpillar replacement parts or compare other hydraulic cylinder seal kits. For fitment confirmation, send the OEM part number and machine model through our inquiry form or WhatsApp.