Multiquip B3120100604 Insulator Washer

The Multiquip B3120100604 is a genuine OEM Insulator Washer designed for the DCA and MQP series super-silent, ultra-silent, and standby diesel generator families, including the DCA36SPXU4F, DCA45SSIU4F, DCA70SSIU4F, DCA70SSJU4F, DCA70USI2, MQP56, and related variants. As a direct OEM replacement, it matches the original component specification and installs without any fitment guesswork. DHS Equipment stocks this part to help keep your Multiquip generator running safely and at full capacity.

Key Features

• Genuine OEM Dielectric Integrity — Sourced directly from Multiquip, this insulator washer delivers the correct electrical isolation properties required for generator electrical assemblies, preventing unintended current paths and component damage.
• Direct-Fit Replacement — Engineered to match original mounting dimensions and hole tolerances, B3120100604 seats correctly in position without rework or shimming.
• Broad Generator Series Coverage — Confirmed fitment across DCA36, DCA40, DCA45, DCA70, DCA70USI, and MQP56 generator models, covering both super-silent and ultra-silent configurations.
• Protects Surrounding Components — A correctly functioning insulator washer shields adjacent electrical hardware from vibration-induced wear and stray voltage, preserving the longevity of the broader electrical assembly.
• Electrical Safety Compliance — In generator applications, proper electrical isolation at fastener points is critical to safe operation; using the correct OEM-spec insulator washer maintains the designed isolation resistance of the circuit.

An insulator washer acts as a barrier between a metal fastener or conductor and a mounting surface, preventing electrical continuity where it is not intended. In diesel generator assemblies like the DCA and MQP series, these washers are used at key points in the electrical system to isolate components, protect against short circuits, and reduce the transfer of vibration between parts. When an insulator washer degrades, cracks, or is omitted, the risk of electrical faults, component damage, and generator malfunction increases significantly — making timely replacement with the correct OEM part essential.

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.