3 Horse Ranch
Veteran Member
- Joined
- Aug 18, 2017
- Messages
- 1,239
- Location
- Tonasket, WA
- Tractor
- NH B50H Cab, Ford 1715, Poulan Pro 46
I hope there are no sharp corners between there and where he is going.
I hope there are no sharp corners between there and where he is going.
There is also the possibility of a service brake line failure, but that would still allow the driver the option of pulling the red and yellow knobs or taking a runaway ramp. But that wasn't the case here. In reality it seems this guy either had inadequate training. You would think they would at least cover mountain driving in theory if they couldn't do it in practice.
Above 5 MPH pulling the park valves does nothing. The spring brakes don't have that much power.There is also the possibility of a service brake line failure, but that would still allow the driver the option of pulling the red and yellow knobs or taking a runaway ramp. But that wasn't the case here. In reality it seems this guy either had inadequate training. You would think they would at least cover mountain driving in theory if they couldn't do it in practice.
Above 5 MPH pulling the park valves does nothing. The spring brakes don't have that much power.
If this is the case the truck should have been out of service!Above 5 MPH pulling the park valves does nothing. The spring brakes don't have that much power.
The spring brakes don’t have the same force as the service brakes with only about 50% or 60 psi equivalent of the average 120 psi of the service brakes but they certainly should be capable of stopping a vehicle over 5mph if they are adjusted and functional - that is their purpose.
Adjustment is key and most trucks have several brakes out of adjustment at any given time.
They aren’t likely to lock all the wheels like they show in the movies except in winter.