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CAT NO. 12 motor grader 7T 345
CAT NO. 12 motor grader 7T 345
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Posts: 8
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Thank you received: 7
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2 years 9 months ago #233712
by Oakfan707
My brother and I just bought a 7T that hasn't ran in 2 yrs. Replaced the fuel filters and cleaned out the housing. Now having a hard time priming the injection system. Also the starter on the pony motor would bind up here and there so looking for a replacement or rebuild kit for that. The edge of the gear on the starter is worn and the gear also isn't returning or disengaging like i would expect it to do. Any help or info would be greatly appreciated as we don't know a whole lot about this thing and everything has been learning on the fly hahaha. But the pony motor will fire up and run so thats a plus
CAT Twenty Two crawler 2F4426W
CAT No12 Motor Grader 7T345
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Fat Dan
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2 years 9 months ago #233726
by Fat Dan
Thanks for joining.
A 7T sweet ... have any pictures?
First I'd start by getting yourself a few manuals i.e. Parts Book ... Operation & Maintenance manual ... Service Manual... ask around here or ebay. I do believe ACMOC has some information on the 7T in the Tech liberty.
ACMOC Membership
955E 12A08263; 955C 12A04040; 955C 12A03563.
No.12 Diesel Motor Grader 8T14777.
No.12 Diesel Motor Grader 9K9320
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2 years 9 months ago #233727
by bursitis
until you get the pony starter sorted out you can start it with a rope. get the pony running and spinning the big engine open the bleed on top of the tower until fuel comes out of the drain tube. then with the throttle open you can bleed the fuel pumps from the bleed valve on each pump on the backside of each pump. also can crack the injection line at the injector. do all of this with the compression released though.
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2 years 9 months ago #233728
by Fat Dan
ACMOC Membership
955E 12A08263; 955C 12A04040; 955C 12A03563.
No.12 Diesel Motor Grader 8T14777.
No.12 Diesel Motor Grader 9K9320
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2 years 9 months ago #233736
by Oakfan707
Thanks a lot for all the help i really appreciate it. And if anyone has any info period about this beast I'd love to hear it. Love working on old equipment. Also have a CAT 22 thats my next project once i get this main engine running
CAT Twenty Two crawler 2F4426W
CAT No12 Motor Grader 7T345
The following user(s) said Thank You:
Fat Dan
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Posts: 602
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Thank you received: 103
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2 years 9 months ago #233746
by Fat Dan
if anyone has any info period about this beast I'd love to hear it.
Old Magnet should be around soon ... I don't know how he dose it or what book he has but he is good at letting people know the year of Caterpillars they have by the S/N .
I can only guess; an early 7T with the S/N of 345 was most likely a first year production model which started in 1945. However, Old Magnet will be able to confirm or update the year and can lock down whether it be an early or late model year production.
good luck
ACMOC Membership
955E 12A08263; 955C 12A04040; 955C 12A03563.
No.12 Diesel Motor Grader 8T14777.
No.12 Diesel Motor Grader 9K9320
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Oakfan707
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2 years 9 months ago #233747
by Oakfan707
I tried to upload some pics but all the ones i have are too many MB's I'll see if i can take some more that will be under the 4MB limit to post
CAT Twenty Two crawler 2F4426W
CAT No12 Motor Grader 7T345
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CAT NO. 12 motor grader 7T 345
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