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
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
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
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Specifications
Bearing Type
Roller
Color
Blue
Dimensions
8.13 in L x 5.61 in W x 6.25 in H
grp Maximum System Temperature
Under Normal Conditions of Continuous Operation, Not to Exceed 150 deg F. Never to Exceed 185 deg F
Grp Note
Ratings Based on Using Anti Wear Hydraulic Fluid. For Information on Use With Other Fluids, Contact Us For Assistance
Grp Pressure Limit
Inlet: 2500 psi, Outlet: Pressures Over 50 psi Require a Case Drain Line be Installed
grp Recommended Filtration
25 um Return Filter with B10 Rating of at Least 2.2
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.