Product Name: Lock Washer, M8 (Part No. 10069672)

Description:
This component is a standard M8 lock washer, also known as a split lock washer or helical spring washer, specifically designed for use in waterjet cutting system assemblies . It is a circular fastener with a split (helical) design, typically manufactured from hardened carbon steel or stainless steel with a corrosion-resistant finish.

The primary function of this lock washer is to provide spring tension between the head of a bolt or nut and the bearing surface of the component. When tightened, the washer flattens, exerting a continuous opposing force that prevents the fastener from loosening due to vibration and pressure cycling inherent in waterjet intensifier operation.

This specific lock washer is listed as Item 15 in the official parts diagram for the Oil/Water Heat Exchanger Kit (Assembly 72156272), with a quantity of 2 required per assembly .

Applications:

• Secures components in the Oil/Water Heat Exchanger Kit assembly (72156272)

• Provides vibration resistance for M8 fasteners in hydraulic and cooling system connections

• Prevents loosening of bolts and nuts under high-frequency vibration and pressure pulsation

• Used in hydraulic power packages, pump assemblies, and heat exchanger mounting applications

• Compatible with 60,000-94,000 PSI (approximately 4,137-6,480 bar) waterjet systems

Features:

• M8 Nominal Size: Fits M8 bolts, screws, or studs (8mm diameter)

• Split Helical Design: The open-ended ring provides spring tension to resist loosening from vibration

• High-Strength Material: Manufactured from hardened steel for durability under extreme pressure cycling

• Corrosion-Resistant Finish: Typically zinc-plated or coated to withstand moisture and hydraulic fluid exposure

• Vibration Resistance: Essential for maintaining fastener torque in high-vibration waterjet environments

• Standard Dimensions: Conforms to industry standards (e.g., DIN 127) for reliable replacement fitment

Maintenance:

When to Replace:

• Permanent Deformation: If the washer is flattened and no longer provides spring tension (loss of gap), it must be replaced

• Cracking or Splitting: Any visible cracks or splits in the washer material warrant immediate replacement

• Corrosion: Heavy rust or pitting that compromises material integrity

• During Major Overhaul: It is standard practice to replace lock washers whenever the associated fastener is removed during major pump or heat exchanger service

• Loss of Clamping Force: If the bolted joint becomes loose during operation, inspect and replace the lock washer

Inspection and Installation Guidelines:

• Full Depressurization (Critical): Before any maintenance, place the main electrical disconnect in the OFF position, fully depressurize both the hydraulic system and the high-pressure water system, and follow lockout/tagout procedures

• Single-Use Recommendation: While lock washers are sometimes reused, replacement with a new washer is recommended for critical high-vibration applications to ensure proper locking action

• Proper Orientation: Split lock washers have no directional orientation; place the washer between the bolt head/nut and the bearing surface (or under a flat washer)

• Torque Compliance (Critical): Tighten the M8 fastener to the specific torque value listed in the equipment service manual using a calibrated torque wrench. The lock washer must be fully compressed to function properly

• Use with Flat Washer: Often used in conjunction with a flat washer to distribute load evenly across the mounting surface

• Inspect Fastener Threads: When replacing the lock washer, inspect the M8 fastener threads for damage, galling, or corrosion; replace the fastener if damaged

• Clean Installation: Ensure mating surfaces are clean and free of debris, old sealant, or corrosion before installation

• Storage: Store spare lock washers in a clean, dry environment to prevent corrosion before use

• Cross-Reference Part Numbers: 10069672 is listed as Item 15 in Oil/Water Heat Exchanger Kit Assembly 72156272 (Qty 2)