Description

Overview

Optibelt Fan Belt for Thermo King is a condenser and fan drive belt for Thermo King SB series refrigeration units. It sits in the belt-driven side of the unit, so belt wear, cracking or glazing can affect fan drive performance during service. This belt suits the SB-II, SB-III and SB-100 to SB-400 model groups shown for this application.

Features

• Cogged fan belt profile for condenser and fan drive service
• Listed for Thermo King SB-II, SB-III and SB-100 to SB-400 applications
• Optibelt Fan Belt for Thermo King carries a clear brand and part reference for replacement ordering
• Useful when the existing belt number or known interchange number can be matched before replacement

Specifications and Materials

Product type: fan belt. Belt style: cogged. Brand: Optibelt.

Part number: TK-78-0603-OP.

Match the existing belt number and unit series before ordering, because SB applications can use different belts across the drive system.

See the Thermo King belt overview for belt construction details and service context.

Compatibility and Fitment

Check the unit series and the belt position before ordering, because this listing covers condenser and fan belt service rather than every belt on the unit. 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. 78-0603, 780603, 780-603, 78603, 78-603, 78-0695, 780695, 780-695, 78-695, 78695, 50-60200-56, 506020056, 50-6020056, 16000177D, 4642C96H21, 4642C96-H21, 4642C96-H19, 4642C96H19

Compliance and Safety

Inspect pulley condition and belt alignment during installation, and replace belts that show cracking, frayed edges or glazing. After fitting, recheck belt tension and confirm the belt tracks correctly in the pulley groove before returning the unit to service.

Trailer Applications

This belt suits trailer refrigeration service where the condenser and fan drive rely on a dedicated V-belt arrangement. It fits workshop maintenance on compatible Thermo King SB units, especially when the existing belt number or known interchange number can be matched before replacement.

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 service parts used in transport refrigeration maintenance, so this Optibelt Fan Belt for Thermo King sits alongside the drive parts commonly replaced during belt and pulley work.

Browse Thermo King parts at ICS Trailers for more transport refrigeration replacements.