128-9277 Boom Cylinder Seal Kit for Caterpillar 320 L 322B 325B 330B Excavators

Restore dependable hydraulic sealing performance with the WINSCHEN Boom Cylinder Seal Kit. This aftermarket replacement is selected for Caterpillar boom cylinder service on compatible excavators.

Key Features

Direct Replacement: Designed for the specified Caterpillar OEM part number.
Complete Service Solution: Includes the listed seal-related parts for the corresponding repair kit.
Reliable Aftermarket Quality: Built for dependable sealing performance in demanding service.

Compatible Equipment Models

Excavator: 330-A 322-A 330 LN 325-A 325 LN 322B L 330 L 320 L 322 L 330-A L 325 L 325-A L 320-A L 325-A FM L 325B 325B L 322 LN 330B L 330B 322-A N 322B

Seal Kit Related Parts

Part No	Qty	Parts name
525-3493	1	KIT-SEAL
096-1581	1	RING
116-3589	1	RING
7Y-4669	1	RING-BACK UP
7Y-4673	1	RING-BACK UP
5I-8516	1	RING-SEAL
9X-3601	1	SEAL AS-BORE 150
128-9265	1	SEAL-BUFFER
133-6813	1	SEAL-LIP TYPE
095-1633	1	SEAL-O-RING
128-9269	1	SEAL-U-CUP

Specifications

Part Number	128-9277 (1289277)
Part Type	Boom Cylinder Seal Kit
Equipment Brand	Caterpillar
Application	Boom Cylinder Repair
Brand	WINSCHEN
Country of Origin	China
SKU	CTC-128-9277
MOQ	1 SET
Delivery Time	1-3 business days

Need to verify fitment for your specific Caterpillar machine? Contact our technical support team for expert assistance. We offer fast global shipping to keep your equipment operational.

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.