In October 1963, AMP (now TE Connectivity) introduced the Mate-n-Lok connector. Molex Disk Drive Power Connection System tool and connectors Because the pins have a large contact surface area and fit tightly, these connectors are typically used for power. The 1.57 mm pin can carry 5 A of current, while the 2.36 mm can carry 8.5 A. Pins and sockets can be arranged in any combination in a single housing, and each housing can be either male or female. The connector typically has 2 to 24 contacts and is polarized or keyed to ensure correct orientation. The pins and sockets are held in a rectangular matrix in a nylon shell. In such a connector, cylindrical spring-metal pins fit into cylindrical spring-metal sockets. First used in home appliances, other industries soon began designing it into their products from automobiles to vending machines to minicomputers. Molex developed and patented the first examples of this connector style in the late 1950s and early 1960s. Pioneered by Molex Connector Company, the two-piece design became an early electronic standard. Molex connector is the vernacular term for a two-piece pin and socket interconnection. Molex did have a 20 amp, but, I went ahead and used the AMP.AMP Mate-n-Lok and Molex Standard 0.093-inch pin and socket power connectors I wish there was a substancially heavier duty 9 pin connector. i believe the heat coming from the engine fan outlet makes the new location even hoter than the old location on the flywheel side next to the relay. Not sure this is enough as mine is a 20 amp stator. Due to the tractor harness being shorter after the meltdown, I had to relocate the connector up by the fuse box. However, since only 2-3 of the connections burn, I think the problem may be that the connector is not sized for the load in those 2-3 wires creating the overload and heat from the overload. The only info i could find on the replacement connector that I used was that it was rated for 17 amps. I believe that heat is the main problem here also. Twenty years from now, they may need replacing, but many of us will not be around either Caterpillar uses them almost exclusively and you know what kind of crappy environments their machines have to work in. Of course this machine is almost 40 years old so some failure is expected.ĭeutsch Connectors are great products. So I bit the bullet and ordered new terminals, connector bodies, and a regulator just for good measure. A couple of weeks ago, I peeked under there and i could actually see the sparks jumping between the two terminals. The first sign of trouble was that the connector body was melted. I recently had to replace the connectors to the voltage regulator on my C141. When that happens you will get arcing between the male/female parts and now the connector housing will melt and you have a mess. The heat will cause the connector male/female parts to relax (lose compression) and pretty soon you have none at all. On the Onan WH applications, that connector sits real close to the rear cylinder and it gets real hot. For low currents, gold is way better since gold does not oxidize. The sliding motion of assembly scrapes the oxide from the connector surface and gives a bare zinc mating surface. A proper connector has a gas (not gasoline) tight seal at the interface between the two parts. Sealed connectors came into widespread use because of low voltage/currents could not break thru the oxide on the connectors. Guys, I don't want to rain on your parade (no pun intended) but moisture is not the primary culprit here.
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