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4000 Series Geroler Motor, 24.00 cu in/rev, 4 Bolt SAE B Mounting Flange, 1-1/4 in. Straight Keyed Shaft, 1-1/16-12 St.Thd. O-Ring Ports,

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Description & Features

The Danfoss / Eaton Char-Lynn 4000 Series Disc Geroler Standard motor is designed to handle demanding industrial applications such as mowing snow removal and trenching. This highly efficient motor boasts a displacement of 24.00 cu in/rev and utilizes a 4 Bolt SAE B Mounting Flange for secure installation.

Featuring a 1-1/4 in. Straight Keyed Shaft and 1-1/16-12 St.Thd. O-Ring Ports this motor ensures compatibility with various hydraulic systems. The 4000 Series Geroler Motor is engineered for peak performance maintaining a fluid viscosity range of 100-200 SUS and operating efficiently at temperatures up to 180F.

Maximizing energy savings it offers the lowest pressure drop in the industry with a torque rating of 930 newton metre. For continuous back pressure scenarios over 1500 PSI an external case drain line is recommended to keep the motor case full. The motor supports premium quality anti-wear hydraulic fluids and adheres to ISO Cleanliness Code level 18/13 for optimal filtration.

This robust motor is built to last with a recommended break-in period of running at 30% rated pressure for one hour before full load application.

MPN: C1AH65

Supplier Part Number: 109-1106-006

Specifications

Brand
Danfoss
Bearing Type
Tapered Roller
Check Valve Function
With Check Valve Function
Design Code
6
Dimensions
11.28 in L x 5.84 in W x 5.84 in H
Drain Port Dimension
7/16-20 UNF-2B SAE O-ring
Frame Size
395
Housing Material
Iron
Mounting Type
4-Bolt Square Flanged
Orbital Gearwheel Set
Standard
Orbital Gearwheel Set Type
Geroler
Painted
Without Painted
Port Location
Side, Staggered
Port Type
UN-2B, SAE O-ring
Seal Material
NBR
Segment Code
A
Series
4000 Series
Shaft Type
Straight Square Keyed
Valve Type
Disc

Product Questions & Answers (1)

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Question by: Darryl R on Mar 20, 2026, 2:52 PM
motor's been running strong but I got continuous back pressure pushing past 1500 PSI pretty regular, do I need to do anything special to keep from cooking it?
Answer by: Customer Support on Mar 22, 2026, 1:09 PM
At that pressure level, yeah, you'll want to run an external case drain line. The motor can handle up to 1500 PSI without one, but anything consistently above that and you need the drain hooked up to keep the case full of fluid at all times. Running it dry or with insufficient case fill above that threshold is hard on the internals over time.

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