Multiquip B3120100704 Insulator Washer

The Multiquip B3120100704 Insulator Washer is a genuine OEM component designed for the DCA Super-Silent and Ultra-Silent diesel generator series, including DCA36SPXU4F, DCA40SSKU, DCA45SSIU4F, DCA70SSIU4F, and DCA70SSJU4F models. As a direct-source OEM part, it meets the exact material and dimensional specifications set by Multiquip for this generator family. Confirmed fitment spans a wide range of DCA45 and DCA70 variants, making it the correct choice for fleet operators and service technicians working across multiple generator configurations. Order with confidence knowing this is the same part installed at the factory.

Key Features

• Genuine OEM Dielectric Integrity — Manufactured to Multiquip's exact insulation grade specifications, ensuring correct electrical isolation performance within the generator assembly.
• Drop-In Installation — Engineered to the original dimensional profile, allowing the washer to seat and align correctly without machining or adjustment during reassembly.
• Broad DCA Series Fitment — Compatible with DCA36SPXU4F, DCA40SSKU, DCA45SSIU4F, DCA45SSKU, DCA70SSIU4F, DCA70SSJU4F, and related Super-Silent and Ultra-Silent generator variants.
• Maintains Electrical Isolation — A failed or degraded insulator washer can allow unwanted conductivity between fastened components, leading to shorts, grounding faults, or erratic generator output — this OEM part prevents that.
• Electrical Safety Critical — Correct insulation hardware is essential in generator assemblies where improper isolation can create shock hazards or damage sensitive alternator windings.

An insulator washer is a non-conductive fastener component placed between metal surfaces to prevent electrical current from passing between them. In diesel generator assemblies like the Multiquip DCA series, these washers isolate conductive components from the chassis or adjacent hardware, protecting both the electrical system and the operator. When an insulator washer degrades, cracks, or is replaced with an incorrect metal washer, it can compromise grounding integrity, cause intermittent faults, or create conditions that damage alternator components over time.

For technical assistance or help confirming fitment for your specific DCA generator model, contact the DHS Equipment parts team directly.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.