Re: TrevorK's 1955 Packard Patrician
Posted by HH56 On 2017/9/30 9:08:41
Another possibility of oxidation more so than the fuse is inside the control box. There are 2 sets of contacts in the box that need to be closed to bring in a relay for the motor to operate in the desired direction.
The first is a mechanical set which is operated by the link to the bar. When one of those contacts closes it starts the heater wrapped around a bimetal strip so the strip will bend for the time delay and then close the next contact. Once the bimetal has made the connection the relay pulls in and starts the motor. Any of those contacts can oxidize and cause the problem. There is a chance relay contacts could be burned or pitted but not as likely as oxidation on the others.
Old age can take a toll. One poster bought a NOS control switch to replace a damaged original and that new one did not operate. Opening it up he found that after 60 years the contacts all had a layer of oxidation just from sitting on the shelf. Once cleaned the switch worked flawlessly.
Cleaning the switch might be something to consider. The cover is held on by 4 rivets which can be drilled out and cover just lifts off. Once the contacts are gently cleaned using a burnisher or thin contact file the cover can be replaced using ordinary screws and nuts. Just watch out for the hair thin wires going to the heaters and don't use enough force the contacts could get bent.
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The first is a mechanical set which is operated by the link to the bar. When one of those contacts closes it starts the heater wrapped around a bimetal strip so the strip will bend for the time delay and then close the next contact. Once the bimetal has made the connection the relay pulls in and starts the motor. Any of those contacts can oxidize and cause the problem. There is a chance relay contacts could be burned or pitted but not as likely as oxidation on the others.
Old age can take a toll. One poster bought a NOS control switch to replace a damaged original and that new one did not operate. Opening it up he found that after 60 years the contacts all had a layer of oxidation just from sitting on the shelf. Once cleaned the switch worked flawlessly.
Cleaning the switch might be something to consider. The cover is held on by 4 rivets which can be drilled out and cover just lifts off. Once the contacts are gently cleaned using a burnisher or thin contact file the cover can be replaced using ordinary screws and nuts. Just watch out for the hair thin wires going to the heaters and don't use enough force the contacts could get bent.
Attach file:
(92.37 KB)
(74.10 KB)
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