Product Name: Bushing, ORB, .75 x .63 (Part No. 05073176)

Description:
This component is an ORB (O-Ring Boss) hydraulic bushing, specifically a .75 inch by .63 inch size-reducing bushing . According to manufacturer documentation, it is listed as Item 3 in Table 12-35 of the Redundant Kit 72155777, with a quantity of 2 required per assembly . This confirms its role as a critical component in backup hydraulic systems for waterjet cutting equipment, where redundancy ensures continuous operation if a primary component fails.

The bushing is engineered to reduce the port size from a larger ORB female port (3/4″) to a smaller ORB male port (5/8″) within the hydraulic circuit .

Applications:

• Used as a port size reducer in the Redundant Kit 72155777 for waterjet intensifier systems 

• Connects a 3/4″ ORB female port to a 5/8″ ORB male connection

• Enables compatibility between hydraulic components with different port sizes

• Suitable for low to medium pressure hydraulic circuits in waterjet power units

Features:

• ORB (O-Ring Boss) Design: Utilizes a straight thread (SAE J514 standard) and seals via an elastomeric O-ring compressed against the port's machined boss face

• Size-Reducing Configuration: Reduces from .75 inch (3/4″) ORB female thread to .63 inch (5/8″) ORB male thread

• Corrosion-Resistant Construction: Steel body with protective plating for durability in moist waterjet environments

• Direct OEM Replacement: Interchangeable with manufacturer specifications as listed in official parts diagrams 

Maintenance:

Failure Diagnosis (When to Replace):

• External Fluid Leakage: Visible oil weeping at either connection indicates O-ring failure or thread damage

• O-Ring Degradation: Inspect the O-ring for nicks, cuts, flattening (compression set), hardening, or cracking – any visible damage warrants replacement

• Thread Damage: Stripped, galled, or corroded threads prevent proper tightening and sealing

• Cracked or Deformed Body: Any visible cracking or distortion of the bushing body requires immediate replacement

Inspection and Replacement Guidelines:

• Full Depressurization (Critical): Before any maintenance, fully depressurize the hydraulic system, shut down the waterjet system, and follow lockout/tagout procedures

• Single-Use O-Ring: The O-ring is a single-use consumable. Always install a new, lubricated O-ring whenever the bushing is removed and reinstalled

• Do Not Use Thread Sealant: For ORB connections, do not use PTFE tape or thread sealant – the seal is made by the O-ring, not the threads

• Thread Preparation: Clean all threads thoroughly with a soft brush and compatible solvent; remove all debris, old sealant, and corrosion

• Torque Compliance: Tighten the bushing to the specific torque value listed in the equipment service manual using a calibrated torque wrench

• Two-Wrench Method: Use two wrenches – one to counter-hold the bushing body and one to tighten the connection – to prevent twisting stress

• Replacement Criteria: Replace the bushing immediately if threads are damaged, the O-ring groove is compromised, the body shows cracks, or persistent leakage occurs despite proper installation

Cross-Reference Information:

• OEM Part Number: 05073176

• Used in: Redundant Kit 72155777 (Item 3, Qty 2) 

• Thread Standards: SAE J514 (ORB Straight Thread)