D4 7j2741

Showing 1 to 3 of 3 results

R3steve

Topic Author

Offline

Send a private message to R3steve

Posts: 9

Thank you received: 0

I have to get my precombustion chambers out of the head and I don't know if they screw out or how to get them out. Any information would be helpful. Thanks.

Please log in or create an account to join the conversation.

Sun, Feb 10, 2008 9:46 AM

Old Magnet

Offline

Send a private message to Old Magnet

Posts: 16,696

Thank you received: 19

Yes, they unscrew after removing the set screw on the side of the head.
Takes a hex tool to undo them and 200 ft.lbs torque to put them back.
Get new gaskets and use plenty of anti seize on the threads. Redrill for new dog point setscrews once re-installed.

Please log in or create an account to join the conversation.

Sun, Feb 10, 2008 11:44 AM

R3steve

Topic Author

Offline

Send a private message to R3steve

Posts: 9

Thank you received: 0

Reply to Old Magnet:

Yes, they unscrew after removing the set screw on the side of the head.
Takes a hex tool to undo them and 200 ft.lbs torque to put them back.
Get new gaskets and use plenty of anti seize on the threads. Redrill for new dog point setscrews once re-installed.

Thanks Old Magnet. I just wanted to be sure before breaking something.

Please log in or create an account to join the conversation.

Mon, Feb 11, 2008 10:21 AM

Old Magnet

Offline

Send a private message to Old Magnet

Posts: 16,696

Thank you received: 19

Reply to R3steve:

Thanks Old Magnet. I just wanted to be sure before breaking something.

I seem to recall there is a hex bolt head that can be made into a tool but I can't find the size in my notes.....I'll keep looking🙄 🙄

Please log in or create an account to join the conversation.

Mon, Feb 11, 2008 10:51 AM

Showing 1 to 3 of 3 results

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

Price Tractor Pull

Aug 02, 2025 | Price Oval - Parnell Terrace, 5570. Yorke Peninsula, SA

Price Tractor Pull

Aug 02, 2025 | Price Oval - Parnell Terrace, Yorke Peninsula, SA 5570

Cromford Steam Rally

Chapter Two

Aug 02, 2025 | Highacres Farm, Dewey Lane, Brackenfield, Derbyshire DE55 6DB, UK

The Century of Caterpillar

Sep 12, 2025 | Elkader, 203 Johnson St, Elkader, IA 52043, USA

View Calendar

Antique Caterpillar
Machinery Owners Club
1115 Madison St NE # 1117
Salem, OR 97301

[email protected]

Terms & Privacy
Website developed by AdCo

Testimonials

"I also joined a year ago. had been on here a couple of times as a non-member and found the info very helpful so I got a one year subscription (not very expensive at all) to try it out. I really like all the resources on here so I just got a three year. I think its a very small price for what you can get out of this site."
-Jason N

Join Today!