Stellar Industries 34301 Danfoss Tandem Hydraulic Gear Pump – 2.50/1.25 CID

If you’re unsure whether this part is compatible with your truck or equipment, please contact us to confirm fitment before purchasing.

The Stellar Industries 34301 Hydraulic Pump is a Danfoss D-Series tandem gear pump designed to power two hydraulic circuits from a single PTO input. It features clockwise rotation with front and rear displacements of 2.50 and 1.25 cubic inches per revolution.

This heavy-duty cast-iron pump uses an SAE-B two-bolt mounting flange and a 7/8-inch 13-tooth splined input shaft. The two pump sections are rated for pressures of 3,000 and 4,000 PSI, supporting demanding Stellar truck-mounted hydraulic applications.

What This Part Is Used For

The Stellar 34301 supplies hydraulic flow to two separate equipment circuits. Its tandem design allows one PTO-driven pump to operate systems requiring different flow rates and pressure capacities.

Common Reasons For Replacement

One or both hydraulic circuits operate slowly
Pump cannot produce the required pressure
Hydraulic functions lose power under load
Pump shaft or housing seals are leaking
Pump produces excessive noise or vibration
Hydraulic oil overheats during operation
Input shaft splines are worn or damaged
One pump section has stopped producing flow

Key Features

Stellar Industries part number 34301
Danfoss model DE2R-41SH-BB-125-21-N113
Clockwise tandem hydraulic gear pump
Front displacement of 2.50 CID or 41.0 cc
Rear displacement of 1.25 CID or 20.5 cc
Pressure ratings of 3,000 and 4,000 PSI
SAE-B two-bolt mounting flange
7/8-inch 13-tooth splined input shaft
Shared 1-5/8-12 ORB inlet
1-1/16-12 and 7/8-14 ORB outlets
Heavy-duty cast-iron construction
Standard black painted finish