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NHTSA Preliminary Evaluation PE88068

Preliminary Evaluation · VARIOUS BRAKE PROBLEMS · Opened 1988-06-28 · Closed 1988-11-07

Investigation

Action number
PE88068
Type
Preliminary Evaluation
Open date
1988-06-28
Close date
1988-11-07
Manufacturer
E-One Incorporated
Affected makes
EMERGENCY ONE; FEDERAL MOTORS
Affected components
SERVICE BRAKES, HYDRAULIC
Affected model years
1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986
Affected (make, year) variants
10

Summary

SUMMARY: RECENT ROCKWELL REPORTS IDENTIFIED THE FOLLOWING ADDITIONAL CONCERNS: A: INSUFFICIENT AIR PRESSURE DUE TO INADEQUATE AIR COMPRESSORCAPACITY; B: AIR HORN PLUMBED INTO AIR SYSTEM WITHOUT PRESSURE PROTECTIONVALVE; C: BRAKE IMBALANCE CAUSED BY BRAKE PROPORTIONING VALVES WHICHREDUCE THE FRONT BRAKE PRESSURE. THE ABOVE PROBLEMS MAY RESULT IN HEAT CHECKING AND CRACKING OF THE REAR BRAKE DRUMS.

Source

Authoritative
NHTSA ODI investigation page
Machine
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