ACMOC
Login | Register
ACMOC
Identifying D7 pony engines

Identifying D7 pony engines

Showing 1 to 10 of 11 results
1
TOP
Topic Author
Offline
Member
Send a private message to TOP
Posts: 47
Thank you received: 0
I am pretty sure the pony engine on my 17A is not original as the starting crank is located on the side down low next to the track and the bracket for the vertical starting crank was torched off. For the purpose of repairing it and getting parts it would be nice to know what it was from. Any help would be appreciated.
Please log in or create an account to join the conversation.
Tue, Jul 30, 2024 5:25 AM
CRS93082
Offline
Member
Send a private message to CRS93082
Posts: 54
Thank you received: 0
Sounds like the pony for a 7M or 3T.
Please log in or create an account to join the conversation.
Tue, Jul 30, 2024 6:36 AM
gemdozer
Offline
Member
Send a private message to gemdozer
Posts: 1,432
Thank you received: 0
Reply to CRS93082:
Sounds like the pony for a 7M or 3T.
The 17a low serie had the hand crank mechanic horisontal with the magneto vertical
Please log in or create an account to join the conversation.
Tue, Jul 30, 2024 8:26 AM
TOP
Topic Author
Offline
Member
Send a private message to TOP
Posts: 47
Thank you received: 0
Reply to gemdozer:
The 17a low serie had the hand crank mechanic horisontal with the magneto vertical
Still the bracket for the vertical crank was torched off.
Please log in or create an account to join the conversation.
Tue, Jul 30, 2024 9:18 AM
TOP
Topic Author
Offline
Member
Send a private message to TOP
Posts: 47
Thank you received: 0
Reply to CRS93082:
Sounds like the pony for a 7M or 3T.
Any way to positive ID it?
Please log in or create an account to join the conversation.
Tue, Jul 30, 2024 9:20 AM
gauntjoh
Online
Member
Chapter Leader
Librarian
Admin
Chapter Two
Chapter Eighteen
Chapter Thirty One
Send a private message to gauntjoh
Posts: 1,150
Thank you received: 0
Reply to TOP:
Any way to positive ID it?
Pictures would help.
Please log in or create an account to join the conversation.
Tue, Jul 30, 2024 1:12 PM
TOP
Topic Author
Offline
Member
Send a private message to TOP
Posts: 47
Thank you received: 0
Here are some pictures. Pardon the hoses. I am removing a homebuilt auxilliary hydraulic system that I think was meant to run a tilt cylinder on the dozer.
Attachment
Attachment
Attachment
Please log in or create an account to join the conversation.
Tue, Jul 30, 2024 9:52 PM
gauntjoh
Online
Member
Chapter Leader
Librarian
Admin
Chapter Two
Chapter Eighteen
Chapter Thirty One
Send a private message to gauntjoh
Posts: 1,150
Thank you received: 0
Reply to TOP:
Here are some pictures. Pardon the hoses. I am removing a homebuilt auxilliary hydraulic system that I think was meant to run a tilt cylinder on the dozer.
Attachment
Attachment
Attachment
That does not look like a starting engine from an earlier tractor like a 7M. Probably a later model.
Please log in or create an account to join the conversation.
Tue, Jul 30, 2024 11:03 PM
TOP
Topic Author
Offline
Member
Send a private message to TOP
Posts: 47
Thank you received: 0
Reply to gauntjoh:
That does not look like a starting engine from an earlier tractor like a 7M. Probably a later model.
One difference from what the parts/service book says is the way the governor linkage is set up. This one has a rod that snaps onto a ball on a short arm below the pivot while the idle spring is on a long arm above the pivot. The arrangement I expected was that the governor linkage and the idle spring would both be on the same side (above) the pivot.

I wonder which D6, D7 and D8 pony motors will swap with this machine?
Please log in or create an account to join the conversation.
Wed, Jul 31, 2024 1:21 AM
gemdozer
Offline
Member
Send a private message to gemdozer
Posts: 1,432
Thank you received: 0
Reply to TOP:
One difference from what the parts/service book says is the way the governor linkage is set up. This one has a rod that snaps onto a ball on a short arm below the pivot while the idle spring is on a long arm above the pivot. The arrangement I expected was that the governor linkage and the idle spring would both be on the same side (above) the pivot.

I wonder which D6, D7 and D8 pony motors will swap with this machine?
The d8 14a use the same model and the rod picture from yesterday is connect to the carburator lever and the other end is connect to the top governor lever
Please log in or create an account to join the conversation.
Wed, Jul 31, 2024 3:26 AM
D8Dude
Offline
Member
Chapter Nineteen
Send a private message to D8Dude
Posts: 125
Thank you received: 0
It appears to be the correct starting engine to me, here's a picture of the starting engine on my 17A [attachment=77245]IMG_20230405_173128014.jpg[/attachment]
It has the upright crank, but it's removed at the moment for exhaust pipe repair for the starting engine.
Attachment
Please log in or create an account to join the conversation.
Wed, Jul 31, 2024 4:14 AM
Showing 1 to 10 of 11 results
1
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

KORUMBURRA WORKING HORSE & TRACTOR & 100 YEARS OF CAT RALLY

Chapter Nineteen

| 5875 STH GIPPSLAND HWY, NYORA

Booleroo 2025

Chapter Thirty

| Booleroo Centre, 54 Arthur St, Booleroo Centre SA 5482, Australia

CAFES 2025 TULARE, CALIFORNIA

Chapter Fifteen

| Tulare, California

Wheatlands Warracknabeal Easter Rally

Chapter Nineteen

| 34 Henty Hwy, Warracknabeal
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!