ACMOC
Login
ACMOC
Pony mag d717a question

Pony mag d717a question

Showing 1 to 6 of 6 results
white halftrack
Topic Author
Offline
Send a private message to white halftrack
Posts: 63
Thank you received: 0
Hello again all. I just installed a different pony on my d7 17a. The mags are in different locations on the pony but look close to the same. One was mounted on the pony horizontally and the other vertical. The way they mount or the bracket pattern is the same. The problem is on the new used pony I put on I took the cover off to check the points. Thought it was just a rotor bug but it was a plastic gear with no marks. Damn. Took cover off of the other one and it just kinda has a rotor. It looked really nice and after cleaning it up a bit fires very well. Can the two interchange? Would be easier to switch. Any help appreciated.
Please log in or create an account to join the conversation.
Fri, Jul 15, 2016 8:53 AM
Old Magnet
Offline
Send a private message to Old Magnet
Posts: 16,696
Thank you received: 18
Horizontal and vertical magnetos do no interchange. The impulse couplings depend on gravity orientation for the latches to work.
Please log in or create an account to join the conversation.
Fri, Jul 15, 2016 10:12 AM
white halftrack
Topic Author
Offline
Send a private message to white halftrack
Posts: 63
Thank you received: 0
Reply to Old Magnet:
Horizontal and vertical magnetos do no interchange. The impulse couplings depend on gravity orientation for the latches to work.
Dang. Ok. Thanks. Looked in my manual and did not see anything about orientation of the gear inside the mag. No timing marks I could see. Anyone done this?
Also different is the crankcase vent and oil fill. This pony was also a d7 17a so thought all would be identical.

Thanks. Jason
Please log in or create an account to join the conversation.
Fri, Jul 15, 2016 10:49 PM
Old Magnet
Offline
Send a private message to Old Magnet
Posts: 16,696
Thank you received: 18
Reply to white halftrack:
Dang. Ok. Thanks. Looked in my manual and did not see anything about orientation of the gear inside the mag. No timing marks I could see. Anyone done this?
Also different is the crankcase vent and oil fill. This pony was also a d7 17a so thought all would be identical.

Thanks. Jason
Here is how you time the two 17A magnetos.
Where yours uses the gear drive rotor you set it up the same way to fire in #1 position.
Please log in or create an account to join the conversation.
Fri, Jul 15, 2016 11:30 PM
gemdozer
Offline
Member
Send a private message to gemdozer
Posts: 1,468
Thank you received: 11
Reply to Old Magnet:
Here is how you time the two 17A magnetos.
Where yours uses the gear drive rotor you set it up the same way to fire in #1 position.
I am 't sure but the magneto verticalement is counterclock wise and horisontalement is clockwise
Please log in or create an account to join the conversation.
Sat, Jul 16, 2016 1:15 AM
Old Magnet
Offline
Send a private message to Old Magnet
Posts: 16,696
Thank you received: 18
Reply to gemdozer:
I am 't sure but the magneto verticalement is counterclock wise and horisontalement is clockwise
Looking at the magneto drive trunnion and gear for the vertical mag and the camshaft direct drive horizontal magneto they both appear to be counter clockwise rotation.
Please log in or create an account to join the conversation.
Sat, Jul 16, 2016 7:20 AM
white halftrack
Topic Author
Offline
Send a private message to white halftrack
Posts: 63
Thank you received: 0
Reply to Old Magnet:
Looking at the magneto drive trunnion and gear for the vertical mag and the camshaft direct drive horizontal magneto they both appear to be counter clockwise rotation.
It worked. Lined it up. Cleaned the points and it fires on a little gas dribbled in the holes. Shot a ton of nasty carbon and nasty stuff into the air and all over me but I will take it. Amazing. Thank you for the help. Very happy. I will try to start it in the am the right way.

Jason.
Please log in or create an account to join the conversation.
Sat, Jul 16, 2016 9:29 AM
Showing 1 to 6 of 6 results
YouTube Video Placeholder

Follow Us on Social Media

Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.

Upcoming Events

Newby Hall Tractor Fest

Chapter Two

| Newby Hall, Ripon, Noth Yorkshire, HG4 5AJ

High Weald Steam Working Weekend

Chapter Two

| Freshfield Farm, Sloop Lane, Scaynes Hill RH17 7NP UK

Sibbertoft Annual Muck Shifting Weekend

Chapter Two

| Avalanche adventure, Welford Rd, Sibbertoft LE16 9UJ, UK

Cromford Steam Rally

Chapter Two

| Highacres Farm, Dewey Lane, Brackenfield, Derbyshire DE55 6DB, UK
View Calendar
ACMOC

Antique Caterpillar
Machinery Owners Club

1115 Madison St NE # 1117
Salem, OR 97301

[email protected]

Terms & Privacy
Website developed by AdCo

Testimonials

"I became a member recently because the wealth of knowledge here is priceless." 
-Chris R

Join Today!