D2 5U main and rod bearings

933scotty

Topic Author

Offline

Send a private message to 933scotty

Posts: 76

Thank you received: 0

Any body have any luck finding mains and rods for the big motor ? Cat just laughed at me! what does any body think of using the crank and bearings out of a motor I have with a cracked block in my good block?? I got about thirty thou clearance in the bearings in my tractor now but it ran and had good oil pressure! Is this acceptable to run ? I know cats spec for most clearance is 0.015 but don't have a lot of options. The tractor is for show and probably will only run about 5 days a year. Any thoughts will be greatly appreciated, thanks Scotty:confused2:

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

Wed, Apr 25, 2018 4:38 AM

neil

Offline

Moderator

Admin

Send a private message to neil

Posts: 6,933

Thank you received: 4

Cat seems to only have std. For anything undersize, go to Florin or Smith or anyone on machinerytrader.com. I got all of mine from Florin. All were available in 030 except for the front main, so I had that built back up to std and bought that one from Cat.

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

Wed, Apr 25, 2018 5:52 AM

STEPHEN

Offline

Send a private message to STEPHEN

Posts: 2,461

Thank you received: 0

I haven't reviewed the specs but I recall .030 is about as far as is recommended. I think you can run it.

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

Wed, Apr 25, 2018 6:02 AM

ccjersey

Offline

Send a private message to ccjersey

Posts: 4,422

Thank you received: 0

The rear main might be the problem for a show tractor if it starts pouring oil into the clutch. If its showing no signs of that yet, it might be fine. I do know that once it starts knocking its most likely too late to just replace the bearings, so you take that chance.

D2-5J's, D6-9U's, D318 and D333 power units, 12E-99E grader, 922B & 944A wheel loaders, D330C generator set, DW20 water tanker and a bunch of Jersey cows to take care of in my spare time😄

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

Wed, Apr 25, 2018 7:31 AM

dpendzic

Offline

Send a private message to dpendzic

Posts: 2,762

Thank you received: 1

Reply to ccjersey:

The rear main might be the problem for a show tractor if it starts pouring oil into the clutch. If its showing no signs of that yet, it might be fine. I do know that once it starts knocking its most likely too late to just replace the bearings, so you take that chance.

Question--if a crankshaft journal--rod or main--varies say from .02 to .03 clearance, can you just install a bearing without turning the crank? would you install a .02 or a .03 bearing?
thanks

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

Wed, Apr 25, 2018 7:47 AM

timbo1946

Offline

Send a private message to timbo1946

Posts: 254

Thank you received: 0

Reply to ccjersey:

The rear main might be the problem for a show tractor if it starts pouring oil into the clutch. If its showing no signs of that yet, it might be fine. I do know that once it starts knocking its most likely too late to just replace the bearings, so you take that chance.

Did mine a about 6 / 7 years ago. Had to go same route that Neil suggested, except it was the center main that was std all others were 20 under i think. Had to have crank built up and reground

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

Wed, Apr 25, 2018 7:48 AM

ccjersey

Offline

Send a private message to ccjersey

Posts: 4,422

Thank you received: 0

Reply to dpendzic:

Question--if a crankshaft journal--rod or main--varies say from .02 to .03 clearance, can you just install a bearing without turning the crank? would you install a .02 or a .03 bearing?
thanks

[QUOTE=dpendzic;205183]Question--if a crankshaft journal--rod or main--varies say from .02 to .03 clearance, can you just install a bearing without turning the crank? would you install a .02 or a .03 bearing?
thanks[/QUOTE

You would install a 0.015 undersize bearing if such were available. That would leave you with 0.005 minimum clearance and 0.015 maximum. A 0.020 undersize bearing (bearing is actually 0.010 thicker than standard) would result in an area of zero clearance.

Ideally you would have crank reground to bring out of round condition back to zero.

D2-5J's, D6-9U's, D318 and D333 power units, 12E-99E grader, 922B & 944A wheel loaders, D330C generator set, DW20 water tanker and a bunch of Jersey cows to take care of in my spare time😄

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

Wed, Apr 25, 2018 8:57 AM

D2 5U main and rod bearings

Follow Us on Social Media

Upcoming Events

Wheatlands Warracknabeal Easter Rally

61st Annual International Watch Fob Association Show & Sale April 25 & 26, 2025 Lakeside Sand & Gravel Open House & Antique Equipment Show April 26, 2025

Veerkamp Open House 2025

Stradsett Park Vintage Rally

Testimonials