# NHTSA Preliminary Evaluation PE86059
> **AIR BRAKE VALVE LEAKS** · Opened 1986-06-17 · Closed 1987-04-22
## Investigation
- **Action number:** PE86059
- **Type:** Preliminary Evaluation
- **Open date:** 1986-06-17
- **Close date:** 1987-04-22
- **Manufacturer:** SEALCO AIR CONTROLS, INC.
- **Affected makes:** SEALCO
- **Affected components:** SERVICE BRAKES, HYDRAULIC
- **Affected model years:** 9999
- **Affected (make, year) variants:** 1
## Summary

SUMMARY OF INFORMATION FROM MANUFACTURER:IN 1975, SEALCO CONDUCTED ASAFETY RECALL DUE TO FAULTY SEALS IN THE SPRING BRAKE UNITS THEMSELVES.ALTHOUGH THE DEFECT WAS DIFFERENT, THE HAZARD REPORTED BY SEALCO WAS THESAME I.E., THE UNEXPECTED APPLICATION OF THE SPRING BRAKES.ANALYSIS:FROM THE INFORMATION REPORTED BY SCRTD IT APPEARS THAT SEALCOHAS A PROBLEM WHICH PRESENTS THE SAME HAZARD FOR WHICH THEY RECALLED FORIN 1975.PROPOSED ACTION:OPEN A PE.

## Source
- [NHTSA ODI investigation page](https://www-odi.nhtsa.dot.gov/owners/SearchResults?searchType=ID&targetCategory=I&searchCriteria.nhtsa_ids=PE86059)
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