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Box Motor With Internal Check Valves For Bi-Rotational Capability, 5.15 cu in/rev, 4 Bolt SAE B Mounting Flange, 13 Tooth SAE B Splined Shaft, 1-1/4 NPT Side and Rear Ports, Bi-Rotational, Case Drain

Displacement 5.15	Displacement 5.15	Brand Permco Inc.	Brand Permco	Pack Size 1.00	UOM EA	Features Bi-Rotational, Case Drain	Mount 4 Bolt SAE B	Mount 4 Bolt SAE B	Ports 1-1/4 NPT Side and Rear	Ports 1-1/4 NPT Side and Rear	Pressure Rating 2500	Rated Flow 37	Rated Flow 37	Rotation Bi-Rot.	Shaft 13 Tooth SAE B Splined	Shaft 13 Tooth SAE B Splined	Speed Rating 2000 RPM	Speed Rating 2000 Rpm	Supplier Part Number M5100C731OFXK20-14	Alternate Part Numbers Alternate Part Number C1DG98, Alternate Part Number MI-08751740, Alternate Part Number MINO-00653X84417, Alternate Part Number PEL20	Product Weight 47.00 lbs

Product Questions & Answers 2

Product Questions & Answers

got a setup where the return side can see some backpressure. when do i need to run a case drain on this motor?

Question by: Shane M on Mar 4, 2026, 10:54 AM

Once outlet pressure goes over 50 PSI, a case drain line is required. This motor has internal check valves that route case pressure back to the low pressure side, but it still needs that case drain any time you are above that 50 PSI outlet backpressure limit.

Answer by: Customer Support on Mar 5, 2026, 8:21 PM

got a setup running both directions depending on the job, does this motor actually handle true bi-rotational use or is that just a marketing thing

Question by: Randy W on Jun 26, 2025, 6:38 AM

Bi-rotational operation is fully supported on this motor, and the internal check valves are what make it work properly. Those valves automatically route case pressure back to whichever side is running low pressure, so you're not fighting back-pressure damage when you reverse direction. No external hydraulic connections changes needed to swap rotation.

Answer by: Customer Support on Jun 27, 2025, 1:02 PM

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