Intro

The 111-3302 hydraulic cylinder seal kit is an aftermarket rebuild set matching the official Caterpillar part number 111-3302 — listed by the Cat Parts Store as “KIT-HYDRAULIC CYLINDER SEAL”. It is documented for the swing cylinder that pivots the backhoe on Caterpillar B-series backhoe loaders. A leaking swing cylinder means the backhoe drifts while digging and bleeds pressure during positioning; a complete seal-kit rebuild fixes it at a fraction of the cost of a new cylinder.

Verified Application

Fitment verified against independent dealer catalogs (AVSpare, Woma Rubber) for the official Cat part number:

• Caterpillar 416B backhoe loader — swing cylinder
• Caterpillar 426B backhoe loader — swing cylinder
• Caterpillar 428B backhoe loader — swing cylinder
• Caterpillar 515 and 525 — also listed by dealer catalogs for this kit

Fitment note: some product pages also list 436B, 438B and C/D/E/F-series backhoe loaders for this number. We could not verify those fitments against any independent source, so please confirm the cylinder casting number on your machine before ordering.

Replacement Scope

• Part number: 111-3302 (also written 1113302) — official Cat “KIT-HYDRAULIC CYLINDER SEAL”.
• Position: swing (backhoe swing / steering) hydraulic cylinder.
• Kit type: complete hydraulic cylinder seal kit.

Bore/rod dimensions, seal counts and material grades are not published by the sources checked — contact us with your cylinder casting number and we will confirm the kit contents before shipping.

Fitment Verification

Verify before ordering: (1) the Cat part number stamped on the old seal set or cylinder; (2) the machine model and series letter (B-series backhoe loaders are the documented fit); (3) the cylinder casting number. If your machine is a C/D/E/F-series model, send us a photo of the cylinder tag — we will check the correct kit reference for your machine before dispatch.

Factory Inspection & Packing

Each 111-3302 kit is checked for component completeness and profile tolerances before sealing. Kits are packed in dust-protected bags and export cartons, ready for international freight. Neutral, DJF-branded or custom-printed packaging is available for wholesale buyers.

Wholesale Ordering

Factory-direct supply for heavy-equipment parts distributors, backhoe repair shops and rental fleets. Volume and mixed-lot quotations are welcome, and we can reserve stock for repeat buyers. Email [email protected] or contact Phone / WeChat / WhatsApp: +86 15302478615.

MOQ

MOQ: 5 kits. Volume and mixed-lot quotations are welcome — request the MOQ and volume pricing in your enquiry.

FAQ

Q: Is 111-3302 an official Caterpillar part number?

A: Yes — the Cat Parts Store lists 111-3302 as “KIT-HYDRAULIC CYLINDER SEAL”. This product is an aftermarket replacement for that reference.

Q: Which machines is this kit documented for?

A: Independent dealer catalogs list the Caterpillar 416B, 426B and 428B backhoe loaders, plus 515 and 525. Fitments for 436B / 438B or C/D/E/F-series machines are not verified by independent sources.

Q: Is this the swing cylinder or the steering cylinder kit?

A: The swing cylinder that pivots the backhoe is the documented application; the market also refers to it as the steering/swing cylinder depending on the machine layout. Confirm your cylinder casting before ordering.

Q: Can you check fitment for my machine before I order?

A: Yes — send the cylinder casting number or a photo of the old seal set, and we will confirm the correct kit before dispatch.