Product Overview

The Ingersoll Rand 47553887001 85575777 Hose is a hydraulic hose assembly used in the oil circulation system of compatible Ingersoll Rand rotary screw air compressors. It is associated with the separator circuit, where hydraulic oil must be transferred between connected components while maintaining a sealed fluid path under operating pressure.

The 85575777 hose features a -20 hydraulic hose configuration with 1.25-inch ORFS connections and 45-degree elbow fittings. Its angled connection arrangement allows the hose to follow the routing requirements around the separator vessel and oil return line without forcing an excessive bend into the hose body.

This component is particularly relevant to NG R-Series compressor configurations, including R132 and R160 platforms. In these installations, the hose forms part of the hydraulic oil piping arrangement associated with the separator assembly. Correct fitting orientation is important because the connection geometry determines how the hose aligns with the adjoining ports and surrounding components.

Unlike a general-purpose flexible hose, this assembly has specific connection dimensions and formed end fittings. Replacement selection should therefore account for the hose part number, fitting size, elbow orientation, and original compressor configuration. Substituting a straight-ended or differently sized hose can create installation difficulties and affect the integrity of the oil circuit.

Technical Specifications

Product Features

• Hydraulic oil transfer: Carries oil through the compressor’s separator-related hydraulic circuit.
• -20 hose configuration: Uses a hydraulic hose specification suited to the associated circuit connections.
• 1.25-inch ORFS fittings: Provides compatible connections for the corresponding compressor piping arrangement.
• 45-degree elbow ends: Allows the hose to follow the intended connection direction without relying on excessive bending of the hose body.
• Oil-tight connection design: Uses ORFS connections with O-ring face sealing to reduce the risk of fluid leakage.
• Application-specific construction: Matches the routing and connection requirements of the associated Ingersoll Rand compressor assembly.
• Flexible installation arrangement: Accommodates the movement and positioning requirements of connected hydraulic piping.
• Replacement compatibility: Provides a specific part-number reference for maintenance and replacement work.

Working Principle

The 85575777 hose functions as a flexible hydraulic connection within the compressor’s separator oil circuit. During compressor operation, oil moves through the lubrication and separation system to support internal lubrication, cooling, and oil circulation.

The hose connects adjoining hydraulic ports and maintains a continuous passage for oil transfer. Its reinforced hose construction accommodates the pressure and operating conditions associated with the circuit, while the ORFS fittings provide sealed mechanical connections.

The basic oil-flow arrangement is:

Separator Vessel Connection → 85575777 Hydraulic Hose → Oil Return Line → Compressor Oil Circuit

The 45-degree elbow configuration is an important part of its operation. Instead of requiring the hose body to form a sharp directional change near the connection, the angled fittings establish the required routing at the ends. This helps maintain a suitable hose bend and reduces unnecessary mechanical stress at the connection points.

The ORFS connection uses an O-ring positioned at the fitting face to create the seal when the mating surfaces are properly assembled. Clean sealing surfaces and correctly installed sealing rings are essential for preventing oil seepage during operation.

If the hose becomes cracked, internally restricted, or damaged around its fittings, oil circulation may be affected. Leakage can also cause oil loss and contamination within the compressor compartment. Regular inspection of the hose assembly is therefore important during separator and lubrication-system maintenance.

Role in the Ingersoll Rand Compressor Oil System

The 85575777 hose forms part of the hydraulic piping arrangement associated with the separator assembly in compatible NG R-Series compressors. It provides a flexible connection between the separator vessel and the associated oil return piping.

A typical arrangement is:

Separator Assembly → Hydraulic Hose 85575777 → Oil Return Connection → Compressor Oil Circulation System

The hose should be evaluated as part of the complete separator circuit rather than as an interchangeable general-purpose connection. Its fitting geometry and routing must correspond to the original compressor arrangement.

Industrial Applications

Installation and Maintenance

1. Verify the part number: Confirm that 85575777 is the correct hose for the compressor’s separator circuit and compare it with the original installed component.
2. Identify the fitting orientation: Check the 45-degree elbow arrangement at both ends to ensure that the replacement matches the original piping layout.
3. Depressurize the system: Shut down the compressor, isolate the relevant equipment, and release residual pressure before disconnecting the hydraulic hose.
4. Drain residual oil: Prepare an appropriate collection container and manage any oil remaining in the hose or adjoining connections.
5. Inspect connection surfaces: Examine the ORFS fitting faces for scratches, deformation, contamination, or other conditions that could compromise sealing.
6. Replace sealing rings: Inspect the O-rings and install suitable new seals where required during hose replacement.
7. Check hose routing: Ensure that the replacement follows the intended path without twisting, sharp bending, or contact with moving or excessively hot components.
8. Tighten fittings correctly: Follow the applicable compressor service instructions for fitting engagement and tightening requirements.
9. Inspect adjacent piping: Check the separator vessel connections and oil return line for corrosion, leakage, or mechanical damage.
10. Perform a leak inspection: Restore the system according to the approved startup procedure and inspect the hose connections for oil leakage.
11. Monitor operating conditions: Check the oil circulation system during operation and investigate abnormal pressure, temperature, or leakage indications.
12. Document replacement work: Record the installed part number, maintenance date, sealing components replaced, and results of the post-maintenance inspection.

Compatible System Components

The 85575777 hydraulic hose works alongside several components in the Ingersoll Rand NG R-Series separator and oil circulation system.

Recommended Related Models

Key Advantages

• Application-specific hydraulic hose for the Ingersoll Rand separator oil circuit.
• 1.25-inch ORFS connections for compatible hydraulic piping.
• 45-degree elbow fittings for the intended hose routing.
• Flexible connection between separator-related components.
• Supports oil circulation within compatible NG R-Series compressor systems.
• Provides a defined replacement part number for maintenance operations.

Technical FAQs

What is the function of the 85575777 hose in an Ingersoll Rand compressor?

The 85575777 is a hydraulic hose used in the separator-related oil circuit. It connects the associated piping components and provides a flexible passage for oil transfer within compatible NG R-Series compressor configurations.

What is the difference between the 85575777 and a straight-ended hydraulic hose?

The 85575777 uses 45-degree elbow fittings, which establish the required direction at the hose connections. A straight-ended hose has a different connection geometry and may not follow the original piping route without introducing additional bending or installation stress.

What type of fittings are used on the 85575777?

The hose uses 1.25-inch ORFS connections in a -20 configuration. These fittings use an O-ring face seal, so the sealing surfaces and O-ring condition must be checked during installation.

Which compressor models should be checked when selecting the 85575777?

The part is associated with Ingersoll Rand NG R-Series 90–160 kW compressor configurations, including R132 and R160 variants. The exact machine build and original parts arrangement should be checked before ordering a replacement.