Belt Set 78-1341/78-603/78-629 for Thermo King SB – Wear Item
Belt Set 78-1341/78-603/78-629, three-piece EPDM belt kit for Thermo King SB — compatible with SB 100 through SB 400 series and Spectrum DE transport refrigeration units. Replacing all three belts (alternator, fan, engine/idler) as a set at scheduled intervals prevents staggered failures; watch for cracking, glazing, or flutter noise as wear indicators Stocking one set per unit supports fleet-level preventive maintenance and rental turnover cycles Replacement cycle recommendations ship with every order for your maintenance planning.