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Service bulletin SS1034681

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10172751
Published by NHTSA2020-03-24
Manufacturer's numberSS1034681
Manufacturer's date2020-03-23
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY

NHTSA's summary

Service Solution for Lower Radiator Pipe Rubbing on X15 Cummins engine. Due to limited clearance, the lower radiator pipe may rub on the engine block and lower radiator hose may rub on the front engine support causing radiator coolant leakage on Cummins X15 installations.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Cooling system, Radiator

Vehicles listed
CUMMINS X15
WESTERN STAR 49002015, 2016, 2017, 2018, 2019, 2020, 2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
18SP7362020-10-01. Service bulletin. Detroit Diesel Special Publication informing about Heavy Duty Friction Style Belt Tensioner Kit. This heavy duty friction style belt tensioner kit contains the belt tensioner and two M10 bolts to correctly pin the friction style belt tensioner. The M10x80mm bolt is used to pin the engine cooling fan drive arm. The M10x50mm bolt is used to pin the engine accessory drive arm.
sbw8329 HVAC Fre2018-12-10. Service bulletin. Service Bulletin: HVAC Fresh Air Intake Water Leak
sbw20182018-06-25. Service bulletin. sbw2018 Western Star 4800 and 4900 Radiator Mounting
0318-172018-06-18. Service bulletin. (MCM) (GHG17)
sbw20232018-03-05. Service bulletin. sbw2023 Modine Copper/Brass Bolted Downflow Radiator Rebuilding
sb20802017-11-17. Service bulletin. sb2080 Australian CST M1400 Isolated Radiator Retrofit
20-182017-10-15. Service bulletin. 20-18 - Western Star 4800 and 4900 Radiator Mounting, Update?EPA10