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Hydraulic Pump & Coupler Kit for Case 480B, 480C, 580B, 580C Backhoes – 13-Spline

SKU:
BT-CASE-HYDPUMP-KIT
FitsModel:
480CK, 480B, 480C, 530CK, 580CK, 580B, 580C, 580F, 310G, 350, 350B, 450, 450B, 450C, 455B, 455C, 550,  584, 585, 586, 584C, 585C, 586C 584D, 585D, 586D
ListDescription:
Hydraulic Pump & Coupler
Hydraulic Pump & Coupler Kit for Case 480B, 480C, 580B, 580C Backhoes – 13-Spline
Part # BT-CASE-HYDPUMP-KIT

New pump, new coupler, zero excuses. Complete hydraulic power restoration for the 580C/D/E.

Fits Models At A Glance:

  • Case Backhoes:   480CK, 480B, 480C, 530CK, 580CK, 580B, 580C, 580F
  • Case Dozers: 310G, 350, 350B, 450, 450B, 450C, 455B, 455C, 550,  
  • Case Forklifts: 584, 585, 586, 584C, 585C, 586C 584D, 585D, 586D

Key Notes:

  • Kit Includes: (1) Hydraulic Pump (D48950) + (1) Pump Flex Coupler (D90883)
  • Pump Part Number: D48950 | Replaces: D53690, D49241, D80083, D48950, D41390
  • Coupler Part Number: D90883 | Interchanges With: D140524, A51885, D90883
  • Pump Weight: 18 lbs
  • Coupler Weight: 1.2 lbs
  • Combined Kit Weight: 19.2 lbs
  • Input Shaft / Splines: 13-spline on both pump and coupler
  • Pump Spline Diameter: 0.86 inches
  • Pump Mounting Distance: 5.75 inches center to center
  • Coupler Drive Shaft Diameter: 7/8 inch
  • Coupler Hole Spacing: 2 inches center to center, square mounting pattern
  • Pump Condition: Brand new — not a rebuild or remanufactured unit
  • Coupler Condition: Aftermarket replacement part
  • Application: Hydraulic pump drive assembly — connects engine to hydraulic pump via flex coupler
  • ⚠️ Important: Always inspect motor mounts before installation. Broken motor mounts are the most common cause of hydraulic pump failure on Case backhoes — they transfer engine weight directly onto the pump shaft, causing premature wear or damage.

Why Choose Broken Tractor?

✅ Pump & Coupler Together – No hunting for the matching coupler separately; both components arrive ready to install as a complete drive assembly

✅ Brand-New Pump, Not a Rebuild – Full new construction means consistent hydraulic pressure and long-term reliability from day one

✅ U.S.-Based Team That Knows Case – Our specialists can help you verify fitment and walk you through motor mount inspection before you install

$536.00 $524.00
(You save $12.00)

Shipping calculated at checkout. If any item in your order is temporarily unavailable, we'll contact you to arrange a back-order or refund — whichever you prefer.

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Product: Category: Brand: Head Title: Hydraulic Pump & Coupler Kit | Broken Tractor