PK Lindsay C-4X Large Mixing Valve Spindle Arm – Diagram #14 – Models 300LA & 600LA

Keep your older PK Lindsay abrasive blasting equipment in service with the C-4X Large Mixing Valve Spindle Arm. This spindle arm is part of the adjustment mechanism used on the large mixing valve assembly found on PK Lindsay Models 300LA and 600LA.

The C-4X is identified as Item #14 in the exploded parts diagram, making it easy to verify the correct component before ordering.

Part Information:

• Part Number: C-4X
• Product: Large Mixing Valve Spindle Arm
• Diagram Item: #14
• Application: PK Lindsay Large Mixing Valve
• Equipment Type: Abrasive Blasting Equipment

Fits PK Lindsay Models:

• Model 300LA
• Model 600LA

Includes:

Exploded Diagram Item #14

Refer to the exploded parts diagram below to identify the component included with this listing.

Applications:

• PK Lindsay abrasive blast pots
• Pressure sandblasting equipment
• Large mixing valve assemblies
• Commercial abrasive blasting systems
• Industrial surface preparation equipment

Features:

• PK Lindsay C-4X large mixing valve spindle arm
• Identified as #14 in the exploded parts diagram
• Fits Models 300LA & 600LA
• Component of the mixing valve adjustment mechanism
• Works with the spindle and related valve components
• Ideal for repairing or rebuilding an existing large mixing valve
• Replaces a worn, bent, damaged, or missing spindle arm
• Helps restore proper abrasive flow adjustment
• Helps keep older PK Lindsay blasting equipment in service

What It Does:

The C-4X Spindle Arm is part of the mechanical adjustment system of the PK Lindsay large mixing valve. It works with the spindle and related components to control movement of the internal valve mechanism and regulate the amount of abrasive entering the compressed air stream.

Repeated adjustment over years of service can cause wear at the spindle arm's contact and pivot points. Corrosion, accidental damage, or a seized mixing valve can also bend or damage the arm.

A worn or damaged spindle arm can introduce excessive play into the adjustment mechanism, making accurate abrasive control more difficult. Replacing it can help restore smooth, positive adjustment of the existing large mixing valve.

Common Signs the Spindle Arm May Need Replacement:

• Excessive play in the mixing valve adjustment
• Abrasive flow is difficult to regulate
• Spindle arm is bent or visibly damaged
• Worn pivot or connection points
• Adjustment mechanism binds or operates unevenly
• Corrosion or excessive deterioration
• Spindle arm is missing from an incomplete valve assembly

Important When Rebuilding the Valve

The C-4X Spindle Arm – Diagram Item #14 is not included in the PK Lindsay 7-36A Large Mixing Valve Rebuild Kit.

If you're rebuilding the valve with the 7-36A kit, inspect the existing C-4X spindle arm and replace it separately if it is worn, bent, damaged, or missing.

Finding Parts for Older PK Lindsay Equipment

PK Lindsay blast machines may no longer be manufactured, but many 300LA and 600LA machines remain in service. Individual mixing valve components can be difficult to identify and locate when you're working from an older exploded parts diagram.

That's why we include the original PK Lindsay part number and exploded diagram item number whenever possible—so you can identify exactly what you need before ordering.

Important:

This listing is for the PK Lindsay C-4X Large Mixing Valve Spindle Arm – Diagram Item #14 only.

Other components shown in the exploded parts diagram are sold separately unless specifically stated otherwise.

Need another part shown in the diagram? Reach out with the PK Lindsay part number or diagram item number—we'll help you find the right part to keep your machine working.