acmoc

ACMOC Membership Benefits

  • FREE quarterly magazine filled with content about antique Caterpillar machines
  • FREE classified listings
  • ACMOC store discounts and specials
  • Full Bulletin Board Access
    • Marketplace (For Sale/Wanted)
    • Technical Library
    • Post attachments

$44 /year ELECTRONIC

$60 /year USA

$77 /year International

Cat D7G Ripper

More
1 month 2 days ago #259117 by Snuffer61
Cat D7G Ripper was created by Snuffer61
I have purchased a Cat D7G s/n 92V77xx, it has a multi-shank ripper s/n 28K151. I am trying to find parts to reseal the lift cylinders. The 28K s/n prefix does not show up in Cat SiS parts program. My local Cat dealer can not find anything on it either. The tag is a Cat tag. It says "CHILE: M.R. MEXICO-MARCA RESISTRADA". So it appears it was made in Mexico. My question is where can I find a parts breakdown for these ripper lift cylinders? 
Thanks in advance.

Blake 

Please Log in or Create an account to join the conversation.

More
1 month 1 day ago #259123 by PhilC
Replied by PhilC on topic Cat D7G Ripper
There is a cylinder listed under 92V for 3J6429 cylinder GP that is for a ripper set. Is that anything like yours? SIS says it's for a later serial number machine.

944A - Machine SN 43A2589 Engine SN 90A284
955K- Machine SN 71J3772 Engine SN 83Z0704
D6 SN's 4R732sp, 5R2724, 5R4832
D8 SN's 15A1254, 15A2287, 15A2723

Please Log in or Create an account to join the conversation.

More
1 month 1 day ago #259126 by Snuffer61
Replied by Snuffer61 on topic Cat D7G Ripper
Phil,
Thank you for the reply. I put that part number and s/n prefix in SiS but it says No search results available! I cant look at it.
I will look in the library here. I have found a cylinder group 2C6553 that looks close. However it shows a bolt in the head. My cylinder head screws on to the barrel.

Please Log in or Create an account to join the conversation.

More
1 month 1 day ago #259127 by Snuffer61
Replied by Snuffer61 on topic Cat D7G Ripper
I can't find a 2J6429. Was your number supposed to be a 2J6439 maybe? That cylinder has a different style head.

Please Log in or Create an account to join the conversation.

More
1 month 1 day ago - 1 month 1 day ago #259128 by Old Magnet
Replied by Old Magnet on topic Cat D7G Ripper
I couldn't make s/n 28K work but the early 92V used a 12G-up #7 ripper (arrangement 9J567 replaced by 3G2022).
Uses cylinders #3J6439
More digging....28Kxxxx is a military s/n equivalent  to the 12G1-up.
Last edit: 1 month 1 day ago by Old Magnet.
The following user(s) said Thank You: bruce oz

Please Log in or Create an account to join the conversation.

More
1 month 1 day ago - 1 month 1 day ago #259129 by bruce oz
Replied by bruce oz on topic Cat D7G Ripper
serial number 28k no7 ripper 1967 military ,
Last edit: 1 month 1 day ago by bruce oz.

Please Log in or Create an account to join the conversation.

More
1 month 1 day ago #259130 by Snuffer61
Replied by Snuffer61 on topic Cat D7G Ripper
Magnet and Bruce,
Thanks for that info. The 3J6439 cylinders are not like what is on this ripper. These cylinders have a round head that screws on to the barrel.
I'm going to measure the ID of the barrel later and see if I can determine the stroke.
What I'm needing are the pistons and seal kits. The two pistons that came out are aluminum and do not match. I don't know if the originals were aluminum. But I highly doubt it.

Blake

Please Log in or Create an account to join the conversation.

More
1 month 1 day ago #259132 by Snuffer61
Replied by Snuffer61 on topic Cat D7G Ripper
Bruce,
Would you happen to have or know where I can get a parts break down of what cylinders were used on the 28K ripper.
Trying to see if they used different cylinders that the 12G s/n rippers.

Thanks
Blake

Please Log in or Create an account to join the conversation.

More
1 month 1 day ago - 1 month 1 day ago #259133 by Old Magnet
Replied by Old Magnet on topic Cat D7G Ripper
Both cylinder options (correct) are 6" bore x 19.70" stroke (3J-6429 or 4T9290) and have four bolt heads.
I don't have the parts book but you might look into later rippers with s/n 12G7500-up or 82G1000-up to see if they used a different style cylinders.
Last edit: 1 month 1 day ago by Old Magnet.

Please Log in or Create an account to join the conversation.

More
1 month 1 day ago #259136 by bruce oz
The following user(s) said Thank You: Snuffer61

Please Log in or Create an account to join the conversation.

Time to create page: 0.172 seconds
Go to top