Automann 170.065706 TP-3DC Tractor Protection Valve | Replaces Bendix 065706

Automann 170.065706 TP-3DC Type Tractor Protection Valve

Ensure maximum safety and system integrity with this high-performance TP-3DC type tractor protection valve.

The Automann 170.065706 is a critical safety component designed to protect the tractor's air brake system in the event of a trailer breakaway or a severe air leak in the trailer's supply line. This TP-3DC style valve features an integrated double check valve, allowing it to manage air signals from both the primary and secondary braking circuits seamlessly.

Product Overview

The Tractor Protection Valve is the "gatekeeper" between your truck and trailer. In the event of a sudden trailer disconnect, this valve automatically shuts off the air supply to the trailer, preserving the tractor's air pressure so you maintain full braking control. This Automann unit is built to heavy-duty standards, offering a reliable, cost-effective replacement for Bendix-style valves.

Technical Specifications

• Brand: Automann

• Part Number: 170.065706

• Valve Type: TP-3DC (Tractor Protection w/ Double Check)

• Port Configurations:

  • Primary Service: 3/8" NPT & 1/2" NPT

  • Secondary Service: 3/8" NPT

  • Supply/Trailer: 1/2" NPT & 1/4" NPT

• Mounting: Standard flange mount for easy installation.

Industry Cross-Reference

This valve is a direct replacement for the following manufacturer part numbers:

• Bendix: 65706, 065706

• Automann: 170.065706

Key Features & Benefits

• Integrated Double Check Valve: Automatically senses and utilizes the higher air pressure from the primary or secondary reservoir to ensure trailer brake application.

• Preserves Tractor Air: Instantly closes trailer supply lines during a breakaway, preventing a total loss of air pressure in the tractor.

• Corrosion-Resistant Housing: Constructed from high-strength materials designed to withstand the harsh environmental exposure typical of chassis-mounted components.

• OEM Standard Fit: Engineered for a direct "bolt-on" replacement, matching the original port orientations and mounting footprint of the Bendix TP-3DC.

Installation & Maintenance Tip

A leaking tractor protection valve can often be identified by air escaping through the trailer gladhands when the brakes are applied while disconnected. When installing the 170.065706, use a high-quality thread sealant and ensure all air lines are properly supported to prevent vibration damage.