Multiquip 85-135966 Seat Contact Switch AV40

The Multiquip 85-135966 Seat Contact Switch AV40 is a genuine OEM replacement designed for the AV-40. As an authorized Multiquip OEM part, the part meets the exact electrical specifications required for proper switch operation on AV-40 equipment. Sourced directly through the Multiquip parts network, this component ensures a correct, direct-fit installation with no guesswork on compatibility. If your AV-40 is experiencing switch-related operational faults, replacing it with the genuine 85-135966 restores correct function and keeps the machine performing as intended.

Key Features

• Genuine OEM Electrical Specification — Manufactured to the exact resistance and contact output required for the AV-40 seat detection circuit, ensuring consistent switching behavior.
• Direct-Fit Replacement — Engineered to match the original mounting position and connector interface on AV-40 equipment for a straightforward swap during service.
• Confirmed AV-40 Fitment — Designed specifically for the Multiquip AV-40, eliminating compatibility uncertainty when ordering.
• Operator Presence Control Function — Maintains the integrity of the seat-activated safety circuit, which detects whether an operator is seated and controls machine response accordingly.
• Safety-Critical Component — As part of the operator presence system, a correctly functioning seat contact switch is essential to safe machine operation; a faulty switch can cause unexpected behavior or prevent the machine from operating safely.

A seat contact switch is an operator presence component that detects whether a seated operator is in position before allowing or maintaining machine operation. When the switch is functioning correctly, it completes the circuit that permits the machine to run under normal operating conditions; when it fails or wears out, the machine may shut down unexpectedly, fail to start, or bypass the intended safety interlock. Replacing a worn or faulty seat contact switch with a genuine OEM part like the Multiquip 85-135966 restores the circuit to its correct operating state and ensures the operator presence system works as designed.

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.