# Service bulletin M0066850\-01

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.

- Type: Service bulletin
- NHTSA id: 10089337
- Published by NHTSA: 2017\-01\-23
- Manufacturer's number: M0066850\-01
- Manufacturer's date: 2016\-11\-10
- NHTSA component: ENGINE

## NHTSA's summary

EXTENDED LIFE COOLANT \(ELC\) EXHIBITING NITRITE DEPLETION IN MACHINES EQUIPPED WITH ALUMINUM RADIATORS\-NITRITES IN EXTENDED LIFE COOLANT \(ELC\) CAN REACT WITH THE ALUMINUM COOLER TO PRODUCE ELEVATED PH AND LOW NITRITE LEVELS IN SCHEDULE OIL SAMPLING \(S@™O@™S\) SAMPLES. AS THERE ARE MULTIPLE ISSUES THAT CAN CONTRIBUTE TO THE DEPLETION OF NITRITE, CONTACT YOUR LOCAL CAT DEALER TO REQUEST LEVEL 2 COOLANT ANALYSIS IF NITRITE DEPLETION IS EXPERIENCED.

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Engine

## Vehicles listed

- 2012 to 2017 CATERPILLAR CT660
- 2012 to 2017 CATERPILLAR CT680
- 2012 to 2017 CATERPILLAR CT681

JSON: [/v1/bulletins/10089337](/v1/bulletins/10089337)

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