Case 780D Backhoe Seal Kits

HW Part Store carries hydraulic cylinder seal kits for the Case 780D backhoe loader, providing the replacement parts that owner-operators, contractors, and small equipment teams need to complete rebuild and repair work in the field. 

These are hydraulic replacement parts only, not engine parts, brakes, axles, transmissions, or complete machines. For Case 780D equipment operating through demanding cycles of digging, lifting, and grading, hydraulic seal failure is a recurring maintenance issue. 

Having exact-fitting seal kits on hand before a cylinder begins to leak means repair work can begin immediately rather than waiting days for parts to arrive. This directly reduces unplanned downtime and the revenue loss that comes with it.

Our Range of Case 780D Backhoe Cylinder Rebuild Kits

Each aftermarket seal kit is engineered to match the specific rod diameter and bore of individual Case 780D hydraulic cylinders, covering all serial numbers for the listed applications.

The Case backhoe boom cylinder seal kit is built for cylinder number G103044, with a 2-1/2-inch rod and a 4-1/2-inch bore. These Case dipper cylinder seal kits cover cylinder number G103050, designed for a 2-3/4-inch rod and a 5-inch bore.

The Case outrigger cylinder seal kit fits cylinder number G103057 with a 2-1/4-inch rod and a 4-1/2-inch bore. 

The Case swing cylinder seal kit is sized for a 2-1/4-inch rod and a 4-1/4-inch bore, covering cylinder numbers 1978095C1, 1978095C2, and 1978095C3. 

Each kit is individually packaged and labeled, making it straightforward to confirm the correct application before beginning any rebuild. Customers can click the button for their specific backhoe loader model on the product pages to view all available kits for that application.

780D Case Backhoe Parts Seal Kit Availability

For operations that prefer to address every hydraulic cylinder on the 780D backhoe at once, the Case whole-machine kit is good option with free shipping included. 

The kit contains separately packaged seal kits for two backhoe boom cylinders, a backhoe bucket cylinder, one backhoe dipper cylinder, two outrigger cylinders, two backhoe swing cylinders, two loader lift cylinders, and two loader bucket tilt cylinders.

It also includes a free O-ring pick set to assist with removing worn seals and seating new ones during the rebuild. 

Seal kits for the dipper extension, loader clam, three-point hitch, and steering are available separately for teams managing those systems as well.

HW Part Store draws on more than 40 years of hydraulic cylinder servicing experience to support accurate parts identification and fitment guidance for Case 780D hydraulic parts and related applications. 

All Case kits are sourced through quality-vetted vendors and are designed as direct-fit replacements meeting the specifications of the original cylinders.

The store ships most orders the same day, and a compatibility guarantee covers a free overnight replacement if any aftermarket kit does not fit as expected, with unopened kits eligible for return within 30 days. 

For teams managing multiple Case 780D backhoe loader machines, stocking these kits in advance remains one of the most practical ways to keep hydraulic systems operational and maintenance costs under control.