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How do you remove the spark plug wires from the magneto cap?

How do you remove the spark plug wires from the magneto cap?

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doggman
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I need to change out the spark plug wires on my D69U pony motor. But I can’t figure out how get the wires out of the magneto cap. With the cap removed, on the inside of the cap, it looks like there are screw head slots next to the spring loaded carbon terminals in the cap. I gently tried to turn them but they didn’t budge and I didn’t want to risk cracking that old Bakelite cap. What’s the secret combination to get the wires loose? I’m not sure what model mag is on the tractor but it’s a big one. Thanks!
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Mon, Sep 23, 2019 10:32 AM
trainzkid88
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its an american bosch or a eaismann similar internally to the mjk bosch as fitted to the d2/d4 series. the plug wire should just push in dont worry if the cable breaks as you can still get wire plug lead cable from most small engine shops i got mine from a motorcycle place. just save the ends if you can as they are hard to get.

"i reject your reality and substitute my own" - adam savage. i suspect my final words maybe "well shit, that didnt work"

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Mon, Sep 23, 2019 11:23 AM
doggman
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Reply to trainzkid88:


its an american bosch or a eaismann similar internally to the mjk bosch as fitted to the d2/d4 series. the plug wire should just push in dont worry if the cable breaks as you can still get wire plug lead cable from most small engine shops i got mine from a motorcycle place. just save the ends if you can as they are hard to get.
The wires seem really tight in the cap - to the point where they really don’t pull out. I won’t be back in the area of the tractor until Friday but I’ll get more aggressive in trying to pull them out.
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Tue, Sep 24, 2019 7:02 AM
old-iron-habit
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Reply to doggman:
The wires seem really tight in the cap - to the point where they really don’t pull out. I won’t be back in the area of the tractor until Friday but I’ll get more aggressive in trying to pull them out.


You might try twisting them back and forth a twit with a wire plier to break the insulator free. They can get pretty tight after a few decades. But they do simply pull out.
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Tue, Sep 24, 2019 9:01 AM
Paso Bob
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Reply to old-iron-habit:


You might try twisting them back and forth a twit with a wire plier to break the insulator free. They can get pretty tight after a few decades. But they do simply pull out.
Shoot some WD-40 in there first and get them to loosen up.
D-4 7U-43159 with 4S dozer and Cat 40 scraper, D-7 3T-1179 with Cat 7S hydraulic dozer, D-7 17A 13,944, D-8 14A-1160 with Cat 8S cable dozer, Cat 12-99E-4433 Grader. All runners and users.
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Tue, Sep 24, 2019 11:22 AM
doggman
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Reply to Paso Bob:
Shoot some WD-40 in there first and get them to loosen up.
Thanks for the replies and suggestions. It turns out that the wires were glued in with yellow Cat enamel. I finally broke them loose and extracted them with pliers and without cracking the cap. Who’d athunk it? Now I have bigger fish to fry...
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Thu, Oct 3, 2019 10:15 PM
MARCOTEN
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Reply to doggman:
Thanks for the replies and suggestions. It turns out that the wires were glued in with yellow Cat enamel. I finally broke them loose and extracted them with pliers and without cracking the cap. Who’d athunk it? Now I have bigger fish to fry...
For gv and gv 4 mags:
Pull out carbonbrushes and springs . Underneat you find small screws. Undo them a bit and you can pull wire out
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Sun, Oct 13, 2019 9:22 AM
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