a q-tip makes a great applicator for this. a tiny dab of white lithium grease on the cam steps and on any other sliding metal parts is all that's needed. once the head has stepped up three times, it drops all the way down and the process can repeat. you will see a solenoid that tugs on a mechanism that trips a cam causing the head to move a notch. most of the time that mechanism is fully accessible. the head on an 8-track machine raises and lowers via a stair stepped cam mechanism that's actuated by a solenoid. one tiny dab of white lithium grease where the retainer plate contacts the flywheel is all that's needed. on some decks, the flywheel may have a retainer plate to keep it from flopping out.
most decks have two bronze bearings to support that shaft. the capstan shaft is what has the big flywheel attached to it. one drop on each bearing contact on the capstan shaft. (pic 1) one drop on the motor shaft where it enters the housing. what to lube? sewing machine oil will be adequate for this step. you can buy just the belt you need from specialized suppliers but you'll pay almost as much for that single belt as you will for a universal kit.Īll machines eventually need some TLC. after purchasing a few of those kits you end up with a good stockpile of belts for future repairs. since i fix lots of old tape machines, i purchase universal kits that look like they may have what i need. will it work? yes but will result in very noticeable and annoying speed variations as the tape plays. despite the size and appearance, a rubber band is NOT the proper fix. if it just slips around the motor pulley, your belt is stretched. it should have quite a bit of resistance to slipping.
to check for a stretched belt, hold the motor pulley without touching the belt and try to turn the flywheel. be very careful with the tar like residue from a melted belt.
PIONEER 8 TRACK TAPE PLAYER HOW TO
see my instructable on rebuilding a norelco cassette recorder for details on how to deal with a melted belt. unless the machine was recently serviced, chances are your belt will be in one of two states. that's one of the endearing yet annoying quirks of the 8-track format.Ĩ-track machines are amongst the simplest of tape machines. this meant that songs had to be picked to equally fit into each program or you just let it ride and your music got interrupted by a KERCHUNK during the song as the machine changed programs. the tape was divided up into 4 programs each equal length. changing programs can be left to the machine to do it automatically or you can hit the program change button and do it yourself during tape play. when the foil hits the contacts it trips the program change circuit causing the playback head to shift to the next program. that is the sensing contact that causes the machine to automatically change programs as the tape is playing. in the picture you will see the roller on the top right, the playback head in top center, and top left you will see what looks like two "J's" back to back. unlike most tape formats, the rubber roller called the pinch roller is part of the tape cartridge and not the machine. what makes this work is that the backside of the tape, the side that doesn't have the music on it, is polished up with a dry lubricant to aid it in sliding out and over the spool of tape. the action of the tape being pulled from the center causes the spool to turn thus winding the tape back onto itself. the tape is pulled from the center, out past the machine's mechanism, and then re-spools onto itself on the outside of the spool.
some basic machines like the one featured in this instructable only offer play and program change. the only options the consumer has is play, fast forward, record, and program change. The 8-track tape is a continuous loop tape so there is no rewind. let's learn a little bit about these tapes and how to revive a malfunctioning machine! 4 programs each having 2 tracks since they are in stereo = 8 tracks. they are musical programs and have nothing to do with computers. shove the tape in and the machine starts playing. 8-track tape machines found there way into portables, cars, and home stereo. initially created by lear jet, the aircraft folks, the 8-track became popular due to its simplicity of use.
PIONEER 8 TRACK TAPE PLAYER PORTABLE
sure there were other portable formats but the 8-track was the first to win wide public acceptance and become a common option in automobiles of the 60's-70's. the 8-track was the first portable music medium that actually really took off. they can still be easily found at thrift stores and flea markets for less than the cost of a snickers bar. *** this instructable takes into account that you have some mechanical dexterity and some experience in disassembling consumer electronics *** lalala music music KERCHUNK! the lowly 8-track tape, abandoned long ago in favor of the cassette tape.
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