Description

Overview

Thermo King Belt Tensioner With Pulley suits SLX, SLXe and SLXi trailer refrigeration belt-drive systems, so it controls belt tension and keeps the drive side running square during service. It replaces the older tensioner layout used on earlier units, and it comes as a complete assembly with the pulley already fitted. When the arm, bushings or pulley wear out, belt tracking can suffer and the drive can start to run rough or noisy.

Features

• Complete tensioner assembly supplied with pulley.
• Suits Thermo King SLX, SLXe and SLXi applications.
• Updated design includes metal polymer bushings and a forged nitrided tensioner arm.
• Replaces the older 78-1620 style tensioner arrangement on supported units.

Specifications and Materials

Thermo King Belt Tensioner With Pulley uses updated bushings, a forged nitrided arm, revised torsion spring orientation, reduced-clearance seal washers, and a pulley design that uses a tight bearing fit with a heat sink washer. Those changes matter because the tensioner works under constant belt load and repeated movement through normal unit operation.

Part number: TK-77-3192-AM.

See the official Thermo King tensioner pulley overview for belt-drive component context

Compatibility and Fitment

Match the unit range and check whether the job needs the tensioner with pulley rather than the tensioner body on its own before ordering. This cross-reference listing means this part is a suitable replacement for the part numbers and applications shown. Some changes in installation may be required. 77-3192, 773192, 78-1620, 781620, 78-3192, 783192

Compliance and Safety

Shut the unit down before belt-drive work, and keep hands, tools and clothing clear of rotating pulleys and belts. If the old tensioner has let the belt run hot, glazed or off-line, inspect the matching belt and nearby pulleys at the same time. Also check the mounting points and arm travel during reassembly, because a fresh tensioner will not correct a worn belt path on its own.

Trailer Applications

Thermo King Belt Tensioner With Pulley suits trailer refrigeration service where the drive side needs a complete tensioner and pulley assembly instead of separate loose parts. Workshops usually replace it during belt-drive repairs, but it also makes sense when the arm has developed play or the pulley no longer runs smoothly. On SLX, SLXe and SLXi units, that approach helps restore proper belt control before the drive system wears further.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Why Choose ICS Trailers

ICS Trailers carries Thermo King drive parts used in belt and tensioner repairs, so this assembly sits alongside the related service items workshops often replace in the same strip-down.

Browse Thermo King parts at ICS Trailers for more trailer refrigeration replacements