divemaster5734
Full Access Member
Found a donor truck that had sat rusting for 15 years, been picked over by unknown others, and aside from the heinous condition of everything, got the engine to fire up and even though it was missing axles, determined the ZF was also good.
Unfortunately, the steering column was already sitting on the floor and someone had attempted to remove the brake/clutch, but they were unable to due to the enormous amount of rust and mold, so instead just pretty much stripped all the easy stuff and left mostly sitting on the floor.
Which is the point of this post, I only had the core assembly, which had to be sledge hammered apart for reference.
After reassembly and parts from LMC the assembly is back together, but I am baffled by the operation.
With the large spring installed it will actually hold the clutch pedal to the floor after a very short travel.
There looks to be an additional hole in the assembly that could take a spring, but I didn't see any wear marks from a second spring on the clutch pedal.
There doesn't appear to be a return spring on the brake, so I assume the master brake cylinder provides the pressure to return the brake to the outer stop.
Is this the same type of operation for the clutch, in that the clutch master provides the main return force for the pedal to return to the full out stop?
The large spring pivots like a break-away, which would then assist in keeping the clutch pedal to the floor, kinda like a compound crossbow has a break-away to drop the pull force to hold for sighting.
I've added a couple pictures for clarification.
Pedal 2 is clutch held to floor by spring with the brake pedal up for reference. Pedal 5 is clutch in full up.
BTW, discovered that while that spring shows as no longer available for the 87-91's, it can be purchased today on eBay for $9 for a 1975 F350.
Thanks
Unfortunately, the steering column was already sitting on the floor and someone had attempted to remove the brake/clutch, but they were unable to due to the enormous amount of rust and mold, so instead just pretty much stripped all the easy stuff and left mostly sitting on the floor.
Which is the point of this post, I only had the core assembly, which had to be sledge hammered apart for reference.
After reassembly and parts from LMC the assembly is back together, but I am baffled by the operation.
With the large spring installed it will actually hold the clutch pedal to the floor after a very short travel.
There looks to be an additional hole in the assembly that could take a spring, but I didn't see any wear marks from a second spring on the clutch pedal.
There doesn't appear to be a return spring on the brake, so I assume the master brake cylinder provides the pressure to return the brake to the outer stop.
Is this the same type of operation for the clutch, in that the clutch master provides the main return force for the pedal to return to the full out stop?
The large spring pivots like a break-away, which would then assist in keeping the clutch pedal to the floor, kinda like a compound crossbow has a break-away to drop the pull force to hold for sighting.
I've added a couple pictures for clarification.
Pedal 2 is clutch held to floor by spring with the brake pedal up for reference. Pedal 5 is clutch in full up.
BTW, discovered that while that spring shows as no longer available for the 87-91's, it can be purchased today on eBay for $9 for a 1975 F350.
Thanks
