Hydraulic Pump Coupler Kit for Case 480CK, 580CK, 680CK Backhoe – D64311

Fits Models At A Glance:

Case Backhoe Loaders:

• 480CK
• 530CK
• 580CK
• 580B
• 680CK

Case Forklifts:

• 584
• 585
• 586

Kit Includes:

• Splined hydraulic pump coupler shaft
• Engine coupler (13-spline)
• Pump coupler

Key Notes:

• Part Numbers: D64311 (coupler shaft), D90883 (engine coupler), D31108 (pump coupler)
• Also Replaces: D30569 (superseded coupler shaft number)
• Weight: 3.00 lbs (1.36 kg)
• Splines: 13-spline
• Type: Complete hydraulic pump drive coupling kit
• Why Buy as a Kit: These three components wear as a set and typically fail together — replacing all three at once restores the full drive coupling and avoids a second teardown
• Application: Transfers rotation from the engine to the hydraulic pump on the Case backhoe and forklift models listed above

Common Use Case or Symptoms:
Use when the hydraulic pump has stopped driving, you hear knocking or rattling at the pump drive, or the splines on the shaft or couplers are worn, rounded, or sheared — a failed coupling leaves the pump turning intermittently or not at all.

Why Choose Broken Tractor:
✅ All Three Failure-Prone Parts in One Kit — shaft, engine coupler, and pump coupler together for a complete repair
✅ Saves Over Buying the Pieces Separately — one order, one shipment, one teardown
✅ Fast Shipping from a U.S.-Based Team — ready to ship from our U.S. warehouses