Hand control valve failure
Failure of the parking brake valve upper cam plate around the central boss may allow the parking brake to release and could result in the vehicle running away.
Volvo F4
1975–1986 · 0 documented defects · 2 markets
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This file gathers the known defects of the Volvo F4, written and sourced by the community. Anyone can read; a free account lets you contribute. A defect earns the seal once enough reputable contributors have validated it.
Most serious reported defects
No defect documented for this selection yet.
Latest official recalls
See all (3) →Service brakes, hydraulic:Foundation components:Hoses, lines/piping, and fittings
A brake tube may break due to resonant vibration generated by operation of the vehicle. If tube breakage occurs, both front wheel and trailer brakes would remain functional, but the stopping distance would be increased.
Latches/locks/linkages
On certain vehicles, the endstop for the secondary cab lock hook may experience abnormal wear. This can prevent the hook and latching bracket from engaging when the cab is powered.
Latest service bulletins
No service bulletin found for this model.
Sources: NHTSA (United States, public domain), Transport Canada (Open Government Licence – Canada), DVSA (United Kingdom, Open Government Licence v3.0), RappelConso and EU Safety Gate (France, Licence Ouverte 2.0).