112-1131-006 Char-Lynn 6000 LSHT Hydraulic Motor 315cc

Product Overview

The 112-1131-006 is a low-speed, high-torque geroler hydraulic motor from the Eaton Char-Lynn 6000 Series — a proven platform engineered for applications demanding smooth power delivery and exceptional starting torque. With a displacement of 312 cc/rev and a continuous pressure drop rating of 20 MPa, this motor delivers over 80 hp in a compact cast-iron package.

Manufactured to exact Eaton OEM engineering drawings, every unit features a SAE D 4-bolt square flange (228.6 mm bolt circle), 17-tooth spline shaft, and staggered SAE O-ring ports — ensuring true drop-in interchangeability with original Char-Lynn 6000 Series motors without pipeline modification or bracket adjustment. Each motor undergoes 100% simulated-condition bench testing to verify torque stability, rotational smoothness, and zero-leakage performance under rated operating pressure.

Technical Specifications

• Model Number: 112-1131-006

• OEM Series: Eaton Char-Lynn 6000 Series (equivalent to BMK6-315)

• Displacement: 312 cc/rev (geometric displacement 311.6 cm³/rev)

• Continuous Max Speed: 304 rpm

• Intermittent Max Speed: 455 rpm

• Continuous Max Pressure Drop: 20 MPa (≈2,900 psi)

• Intermittent Max Pressure Drop: 30 MPa (≈4,350 psi)

• Continuous Max Torque: 920 N·m

• Intermittent Max Torque: 1,325 N·m

• Flange Type: SAE D, 4-bolt square, pilot Ø 152.4 mm (6.00 in)

• Mounting Hole Diameter: 15.24 mm (0.600 in)

• Bolt Circle Diameter: 228.6 mm (9.00 in)

• Output Shaft: 17-tooth spline

• Port Size: 1.3125-12 UN-2B SAE O-ring ports, staggered layout

• Housing Material: Cast iron

• Weight: Approx. 27.3 kg

• Control Type: Disc valve, fixed displacement

Key Technical Advantages

1. Precision Geroler Gear Set with Disc Valve Distribution

The motor utilizes Eaton’s patented Geroler gear set, featuring roller-tooth geometry that minimizes friction losses while the precision disc valve ensures uniform torque output with exceptionally low torque ripple. Gear set tolerances are held to micron-level accuracy, maintaining high volumetric efficiency even under elevated back-pressure conditions.

2. True Drop-in Interchangeability

The 112-1131-006 replicates the SAE D large square flange, 17-tooth spline shaft, and staggered port layout of the original Eaton specification. Installation dimensions are 1:1 identical, enabling direct replacement of OEM Char-Lynn 6000 Series motors without pipe reworking or adapter plates — dramatically reducing machine downtime and retrofit costs.

3. High-Load Spline Shaft with Reinforced Bearing Structure

The spline shaft is precision-forged from alloy steel and surface-hardened, providing high tooth-contact strength for frequent start-stop cycling and alternating loads. Dual journal bearing arrangement maintains stable radial load capacity under low-speed, heavy-duty conditions, extending service intervals.

4. Cast Iron Housing with Multi-Layer Sealing

The high-strength cast iron housing features a low-gloss anti-rust primer coating suitable for dusty, high-humidity environments common in agricultural harvesting, snow removal, and wood processing. The multi-layer NBR sealing system combines a high-pressure shaft seal with an external dust seal to block both internal and external leakage paths.

5. 100% Simulated-Condition Factory Testing

Every motor undergoes comprehensive hydraulic bench testing before shipment, verifying torque stability, rotational smoothness, and zero-leakage performance at rated pressure — ensuring consistent quality across every delivered unit.

Application Areas

• Snow removal equipment (snow blower drive, chute rotation)

• Turf maintenance machinery (mower deck drive)

• Agricultural sprayers (agitator and pump drive)

• Chain saws and wood processing machinery (feed drive)

• Trenchers (chain drive)

• Mobile equipment propel and swing drives

Expert Maintenance Tips

1. System Flushing Before Installation: Flush the hydraulic circuit with clean oil to achieve NAS 8 cleanliness or better prior to motor installation. Particulate contamination entering the disc valve clearances will cause premature wear.

2. Port Connection Torque: SAE O-ring ports should be tightened to 95–110 N·m. Over-torquing may deform the port seat. Always use a calibrated torque wrench and install new O-rings.

3. Initial Start-Up Bleeding: Before first operation, run the motor at low pressure (< 5 MPa) with no load for 5–10 minutes to bleed trapped air. Confirm normal noise levels before gradually increasing to working pressure.

4. Hydraulic Oil Maintenance Interval: Replace hydraulic oil and filter every 1,000 operating hours or 6 months, whichever comes first. Recommended oil viscosity: 20–40 cSt. Operating temperature range: -20°C to 80°C.

5. Case Drain Line Configuration: When system back-pressure exceeds 2 MPa, install a dedicated case drain line to the reservoir to prevent excessive pressure on the shaft seal.