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Box Motor With Internal Check Valves For Bi-Rotational Capability, 5.79 cu in/rev, 4-Bolt SAE B Mounting Flange, 13 Tooth SAE B Splined Shaft, 1-1/4 NPT Side and Rear Ports, Replaces Muncie PL25

Description & Features

Engineered for demanding applications this 5.79 cu in/rev gear motor with 4-bolt SAE B mounting flange features a 13 tooth SAE B splined shaft and 1-1/4 NPT ports on both sides and rear. The robust design includes internal check valves facilitating bi-rotational capability and efficient case pressure management.

Utilizing Permco's "Continental Shaft " the motor allows for straightforward shaft changes by simply removing the snap ring eliminating the need for motor disassembly. All components from the shaft covers to the gear housings are made from a special iron alloy ensuring longevity and performance.

Precision-cut gears contribute to high volumetric efficiency. The motor operates best below 150F during continuous use with an inlet pressure limit of 2500 PSI. For optimal filtration a 25 micron return filter with a B10 rating of at least 2.2 is recommended.

MPN: M5100C731OFXQ22-14

Supplier Part Number: M5100C731OFXQ22-14

Specifications

Displacement 5.79	Displacement 5.79	Brand Permco Inc.	Brand Permco	Pack Size 1.00	UOM EA	Features Replaces Muncie PL25	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 41	Rated Flow 41	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 M5100C731OFXQ22-14	Alternate Part Numbers Alternate Part Number C1DG99, Alternate Part Number M5100C731OFXQ22-14, Alternate Part Number MI-08751753, Alternate Part Number MINO-00653X84419, Alternate Part Number PEL22	Product Weight 49.52 lbs

Similar Products

Model Number	Displacement	Mount	Shaft	Ports	Features
PEL17C Box Motor w Internal Check Valve	4.5	4-Bolt SAE B	13 Tooth SAE B Splined	1-1/4 NPT Side and Rear	Replaces Muncie PL19
PEL20C Box Motor w Internal Check Valve	5.15	4 Bolt SAE B	13 Tooth SAE B Splined	1-1/4 NPT Side and Rear	Bi-Rotational, Case Drain
PEL22C Box Motor w Internal Check Valve	5.79	4-Bolt SAE B	13 Tooth SAE B Splined	1-1/4 NPT Side and Rear	Replaces Muncie PL25
PEL25C Box Motor w Internal Check Valve	6.4	4 Bolt SAE B	13 Tooth SAE B Splined	1-1/2 NPT Side, 1-1/4 NPT Rear	Bi-Rotational, Case Drain

Product Questions & Answers (3)

Question by: Scott C on Jun 4, 2025, 9:09 PM

Been running a Muncie PL25 for years and it finally gave out on me. This Permco unit a straight swap for it?

Answer by: Customer Support on Jun 6, 2025, 8:41 PM

it's a direct replacement for the Muncie PL25. Same 4-bolt SAE B mounting flange and 13-tooth SAE B splined shaft, so the physical fitment lines right up. Port size is 1-1/4 NPT on both the side and rear, which matches the PL25 layout. Just make sure your unused ports get plugged before you fire it up.

Question by: Freddie J on Jan 20, 2026, 8:09 PM

What kind of filtration is best with this motor?

Answer by: Customer Support on Jan 22, 2026, 12:27 PM

A 25 micron return filter with a B10 rating of at least 2.2 is recommended for optimal filtration.

Question by: Tony T on Jul 22, 2025, 6:37 AM

got a Muncie PL25 on a piece of equipment, is this Permco motor actually the right replacement or am i gonna be fighting the mount and shaft

Answer by: Customer Support on Jul 24, 2025, 6:15 AM

For replacement purposes, it is called out as replacing a Muncie PL25, and it comes with a 4 bolt SAE B mounting flange plus a 13 tooth SAE B splined shaft. Porting is 1-1/4 NPT with ports on both sides and the rear, and the two ports you do not use need to be plugged.