Fulltext TSBs

Technical Service Bulletins

TSB
98-22-4
  • BRAKES – “WHISTLING” NOISE FROM HYDRO-MAX BRAKE BOOSTER ASSEMBLY – MOTORHOME CHASSIS VEHICLES
  • NOISE – “WHISTLING” FROM HYDRO-MAX BRAKE BOOSTER ASSEMBLY – MOTORHOME CHASSIS VEHICLES
Publication Date: OCTOBER 27, 1998

LIGHT TRUCK:
1999 SUPER DUTY F SERIES

ISSUE:

A “whistling” noise under light to moderate brake applications may occur on some vehicles. This may be caused by the contour of the valve in the Hydro-Max brake booster which permits fluid to pass around it resulting in a whistling noise.

ACTION:

Replace the Hydro-Max assembly with a revised Hydro-Max assembly. Refer the 1999 F Super Duty Workshop Manual, Volume 1, Section 206-07, Power Brake Actuation, for service procedure details.


PART NUMBERPART NAME
F81Z-2005-CAHydro-Max Assembly

OTHER APPLICABLE ARTICLES:

NONE

WARRANTY STATUS:

Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATIONDESCRIPTIONTIME
982204AReplace Brake Booster0.9 Hr.

DEALER CODING

BASIC PART NO.CONDITION CODE
200533

OASIS CODES:

301000, 702000, 702100