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72400-RZX-04

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Description & Features

This medium duty hydrostatic transmission pump is manufactured by Danfoss Power Solutions, formerly Eaton.

The 72400-RZX-04 Eaton pump is designed for demanding applications.

SKU: 72400-RZX-04

Supplier Part Number (MPN): 72400-RZX-04

Alternate Part Numbers: C1JA21

Specifications

Brand
Danfoss
Additional Function
Bypass Valve
Code Title
49.2 cc/rev [3.00 cu-in/rev] Servo Controlled Variable Displacement Pump
Control Type
Manual
Design Code
D
Dimensions
12.67 in L x 8.43 in W x 9.07 in H
Drive Shaft Type
13 to 15 Teeth Splined
Housing Material
Iron
Inlet Size
1-5/16-12
Inlet Type
SAE O-ring Straight Threaded
Input Shaft Rotation
Counterclockwise (Right-Hand)
Maximum Operating Pressure
4000 psi
Mounting Type
2-Bolt Flanged
Outlet Size
1-5/16-12
Outlet Type
SAE O-ring Straight Threaded
Rotation Direction
Clockwise (Right Hand), Counter Clockwise
Series
72400 Series
Shaft Pitch
16/32
Special Features
Diagnostic Ports 2 x 9/16-18 UNF-2B SAE O-ring Ports (Backplate)

Product Questions & Answers (4)

Question by: Cody P on Aug 10, 2025, 10:29 AM
i keep seeing 72400-RZX-04 pop up in our system, what exactly is it?
Answer by: Customer Support on Aug 12, 2025, 6:34 AM
In plain terms, it is a medium duty hydrostatic transmission pump from Eaton, used in hydraulic drive systems where you want smooth, controllable speed and direction. The brand attribute tied to this SKU is listed as Danfoss (NET).
Question by: Earl S on Jul 11, 2025, 8:32 AM
Just want to make sure, will this work as a direct replacement for the Eaton 72400-RZX-04 pump?
Answer by: Customer Support on Jul 12, 2025, 12:11 PM
Yes, this Eaton 72400-RZX-04 hydrostatic transmission pump is designed to be a direct replacement.
Question by: Randy W on Mar 3, 2026, 7:41 AM
got a machine calling for part 72400-RZX-04, is that the same thing as this Eaton medium duty hydrostatic trans pump
Answer by: Customer Support on Mar 4, 2026, 6:59 PM
For that part number, 72400-RZX-04 is identified as an Eaton medium duty hydrostatic transmission pump. The brand on record is Danfoss Power Solutions, and the supplier part number is 72400-RZX-04.
Question by: Glen W on Nov 15, 2025, 7:46 AM
is this the eaton pump for a medium duty hydrostatic transmission setup, or is it something different?
Answer by: Customer Support on Nov 16, 2025, 6:27 PM
Right part. The 72400-RZX-04 is an Eaton medium duty hydrostatic transmission pump, now sold under the Danfoss Power Solutions brand following their acquisition of that product line. The part number carries over, so if you're cross-referencing an older Eaton spec sheet, this is the same unit.

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