Product Name: Hydraulic Hose Assembly (1/4" x 18.0") – Part No. 05071121

Description:
This component is a hydraulic hose assembly with a 1/4 inch (.25) nominal inner diameter and a length of 18.0 inches. It is designed for use in the low-pressure hydraulic circuit of waterjet cutting systems, specifically listed as Item 6 in Table 12-13 of the Hydraulic Hose Connections assembly (P/N 72159239).

The hose assembly is manufactured from wire- or textile-reinforced synthetic rubber with a durable outer cover, capable of withstanding the extreme pulsation, vibration, and pressure requirements of waterjet intensifier operation. It is supplied as a complete assembly with pre-crimped, corrosion-resistant steel fittings (typically JIC or ORB type) on both ends, ready for installation.

Applications:

• Transmits hydraulic fluid under pressure between the hydraulic power unit, intensifier cylinder, and other system components

• Serves as a flexible connector for low-pressure hydraulic lines in waterjet power units, accommodating machine motion and dampening vibration

• Part of the Hydraulic Hose Connections assembly (P/N 72159239) in waterjet cutting systems

• Compatible with KMT, AccuStream, and other standard waterjet hydraulic systems

Features:

• Hydraulic Hose Construction: Features a synthetic rubber inner tube, steel wire braid or spiral reinforcement, and a durable rubber outer cover resistant to abrasion, oil, and hydraulic fluids

• Size Designation: .25 indicates a 1/4 inch nominal inner diameter, a standard size for low-pressure hydraulic circuits and return lines in waterjet systems

• Length: 18.0 inches, providing sufficient length for proper routing within the hydraulic power unit

• Pre-assembled: Supplied as a complete hose assembly with pre-crimped fittings, ready for installation

• Temperature Range: Designed for safe operation from -10°C to +70°C (14°F to 158°F)

• Working Pressure: Low-pressure hose assemblies for hydraulic return and auxiliary circuits are typically rated for lower pressures (e.g., 150 PSI for similar braided hoses)

Maintenance:

Failure Diagnosis (When to Replace):

• External Leakage: Visible hydraulic oil weeping from the hose cover or fittings indicates failure; if leakage occurs at the relief holes of the fitting, the assembly must be put out of operation immediately

• Cover Damage: Inspect for cuts, abrasion, bulging, blistering, kinking, or exposed wire reinforcement; hoses with exposed reinforcement must be withdrawn from service

• Fitting Condition: Check for cracked, corroded, or damaged fittings; deformed or leaking fittings warrant immediate replacement

• Deformation: Separation of layers, blistered, crushed, or kinked hose indicates internal failure

• Exceeded Service Life: Hose assemblies should not exceed a utilization period of 6 years; maximum storage time for completed assemblies is 2 years

• Visual Inspection: Replace immediately if any visible damage is detected during daily visual inspections

Inspection and Replacement Guidelines:

• Pre-Installation Inspection: Before installation, verify that the working pressure matches the application, the hose cover shows no damage, fittings show no corrosion, and threads/sealing faces are clean and undamaged

• Daily Visual Inspection: Operators should perform a visual inspection of hose assemblies daily for any signs of damage

• Periodic Inspection: A skilled person should inspect hose assemblies for function and safety prior to first use and at least every six months

• Pressure Testing: A pressure test at 1.2 x working pressure for 2 minutes should be performed annually, except for hose assemblies in continuous use

• Installation Preparation: Do not remove protective caps until immediately prior to assembly. Slightly grease threads to prevent cold welding (seizing)

• Two-Wrench Method: Use two wrenches—one to hold the fitting and one to tighten the nut—to prevent twisting the hose during installation

• Torque Compliance: When installing, tighten the end fittings to the specific torque value listed in the equipment service manual

• Routing Check: Ensure the hose is not routed near sharp edges, hot surfaces, or moving parts; use clamps or ties to secure and prevent chafing

• Bend Radius Compliance: Do not bend the hose to less than its minimum bend radius; storage in bundles must also respect this requirement

• Full Depressurization (Critical): Before any maintenance, fully depressurize the hydraulic system, shut down the high-pressure water pump, and follow lockout/tagout procedures. Never work on hose assemblies while they are under pressure

• Repair Policy: Repair of hose assemblies is not recommended; if a hose is damaged, replace the entire assembly

• Storage: Store hose assemblies in a cool, dry place with low dust levels; protect from direct sunlight, UV radiation, heat sources, and ozone-generating equipment

Cross-Reference Information:

• KMT / AccuStream #: 05071121

• Component of Hydraulic Hose Connections: 72159239 (Item 6, Qty 1)

• Hydraulic System Specification: Conforms to EN 1829-2 standards for high-pressure water jet machine hoses