7X-2783 Hydraulic Cylinder Seal Kit for Caterpillar Motor Graders & Backhoe Loaders
Product Overview
The 7X-2783 hydraulic cylinder seal kit is a factory-manufactured aftermarket replacement kit cross-referenced against the genuine Caterpillar part number 7X-2783 (also written 7X2783), listed by the Cat Parts Store as “KIT-HYDRAULIC CYLINDER SEAL” and now discontinued by Caterpillar. Independent aftermarket listings document this seal kit across Cat motor graders (120G, 120H, 12G, 130G, 140G, 160H and related G/H-series models) and Cat backhoe loaders (416C, 426C, 428B, 428C, 436C and related B/C-series models), and one independent catalog lists the kit as a 2 in rod x 3-1/2 in bore configuration.
DJF Seals manufactures and supplies the 7X-2783 kit at factory-direct wholesale pricing for Caterpillar equipment dealers, repair shops and fleet maintenance programs.
Verified Application
The following application data was cross-checked against the Caterpillar parts system, parts catalogs and marketplace listings:
| Part Number | 7X-2783 (7X2783) |
| OEM Reference | Caterpillar 7X-2783 “KIT-HYDRAULIC CYLINDER SEAL” (genuine Cat part per parts.cat.com; discontinued, dealer replacement advised) |
| Cylinder Position | Not specified by Caterpillar; aftermarket titles describe a wheel/backhoe hydraulic cylinder seal kit — the current page’s boom/arm/bucket and lift/tilt position claims are generic and not independently confirmed |
| Verified Fitments | Motor graders 120G, 120H, 12G, 130G, 140G, 160H; backhoe loaders 416C, 426C, 428B, 428C, 436C (per eBay and Amazon listings); additionally 936, 966D, D4E, D5M, 933C per one parts supplier listing |
| Rod / Bore (per Caterpillar-Replacement catalog data) | 2 in / 3-1/2 in |
| Condition | New, aftermarket replacement |
Note: specific material grades, pressure rating, temperature range, exact piece counts, certifications and service life are factory data and are not independently verified. Confirm these details with the factory before ordering.
Replacement Scope
This kit covers the sealing elements required to reseal a hydraulic cylinder in the 3-1/2 in bore x 2 in rod configuration as listed by the independent catalog data, matching the OEM 7X-2783 kit. Exact kit contents and piece counts should be confirmed with the factory against your cylinder before ordering.
Fitment Verification
The part number and fitments were verified through multiple independent sources:
- parts.cat.com (Caterpillar official): 7X-2783 “KIT-HYDRAULIC CYLINDER SEAL” — genuine Cat part, currently shown as discontinued.
- eBay: “7X-2783 Seal Kit For Caterpillar 120G 120H 130G 140G 160H 416C 426C 428B” (equipment types listed: wheel loader, backhoe loader, excavator).
- eBay: “7X-2783 Hydraulic Cylinder Seal Kit For Cat 120G 140G Grader” — “fits CAT motor graders and backhoe loaders including 120G, 120H, 130G, 140G, 160H, 416C, 426C, 428B”.
- eBay: “7X-2783 Seal Kit For CAT 416C 426C 428C 436C 130G Backhoe” — backhoe loaders 416C/426C/428C/436C and motor grader 130G.
- Amazon: “7X-2783 Wheel Backhoe Cylinder Seal Kit Compatible with Caterpillar 120G 120H 12G 130G” (B0FL7TN148).
- Amazon: “7X-2783 New Backhoe Loader Seal Kit fits Compatible with CAT Excavator 416C 426C 428C” (B0DRVGH4TL).
- Parts supplier listing (Caterpillar-Replacement brand catalog data): “7X-2783 REPLACES CATERPILLAR, SEAL KIT, CYLINDER, HYDRAULIC” — rod 2 in, bore 3-1/2 in.
- PropelParts: “7X2783 Hyd Cyl Seal Kit for Caterpillar Equipment” — aftermarket replacement.
- Conflict note: the current page also lists 135H, 140H, 143H, 14E, 14G, 14H, 160G, 163H, 426, 426B, 428, 436, 438C, 613B and 615C; these models could not be confirmed in any independent source and are not claimed on this page.
- Conflict note: the current page’s technical claims (0–25 MPa, -20°C to +100°C, NBR materials, ISO 9001 certification) are generic factory data and are not independently verified.
- Materials, pressure, temperature, piece counts, certifications and service life are not independently verified.
Factory Inspection & Packing
Each 7X-2783 kit is assembled and checked at the DJF factory before packing. Sealing elements are placed in labeled poly bags marked with the part number, then packed into export cartons for protection during international shipping. Kits can be packed under DJF branding, neutral packaging, or your own private label for distribution.
Wholesale Ordering
DJF Seals supplies the 7X-2783 kit at factory-direct wholesale pricing for distributors, dealers and repair shops. To request a quotation, send your part number and quantity to [email protected] or [email protected]. OEM/ODM service, custom packaging and bulk container shipping are available for regular programs.
MOQ
MOQ: 5 kits.
FAQ
Q: Which machines does the 7X-2783 seal kit fit?
A: Independent listings confirm Cat motor graders 120G, 120H, 12G, 130G, 140G and 160H, and Cat backhoe loaders 416C, 426C, 428B, 428C and 436C; one parts supplier listing adds 936, 966D, D4E, D5M and 933C. Confirm your machine model and cylinder head number before ordering.
Q: Is 7X-2783 a genuine Caterpillar part number?
A: Yes. parts.cat.com lists 7X-2783 as “KIT-HYDRAULIC CYLINDER SEAL”; Caterpillar currently shows it as discontinued. This page sells a factory-made aftermarket replacement cross-referenced to that number.
Q: Which cylinder does this kit service?
A: Caterpillar does not publish a specific cylinder position for 7X-2783, and aftermarket listings describe it as a general hydraulic cylinder seal kit for the wheel/backhoe and motor grader applications listed above. Verify the cylinder position on your machine before purchase.
Q: What are the cylinder dimensions for this kit?
A: Independent catalog data (Caterpillar-Replacement brand) lists 7X-2783 as 2 in rod x 3-1/2 in bore.
Q: What is the minimum order quantity?
A: MOQ: 5 kits.
