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  7. Possibly silly question.. D4 2T oil pan bolts

Possibly silly question.. D4 2T oil pan bolts

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3 years 9 months ago #224230 by Deebo
Possibly silly question.. D4 2T oil pan bolts was created by Deebo
So I took my oil pan off to inspect and clean (looks excellent) and noticed the 4 bolts attaching it to the flywheel housing were worn down where the main spring rubs them. Or they were ground down deliberately? They weren't CAT bolts so I assumed the heads were taller than CAT spec. However when I checked the parts catalog I noticed that no spring washers are listed in that area. So then I thought as there were spring washers on my bolts I thought that's what had caused the heads to wear as they had made them taller.. However then I noticed there are no spring washers listed for the 26 other 3/8" pan bolts.. and there were spring washers on mine and they are CAT bolts. So now I'm confused. Anyone know whether the 4 bolts need spring washers? There is a rebate in the pan but that maybe for the socket to access the bolts? I'm assuming they do need washers but thought I'd check before I make another error..

Tony



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3 years 9 months ago #224235 by Old Magnet
Replied by Old Magnet on topic Possibly silly question.. D4 2T oil pan bolts
Check the "NOTE" at the top of the parts diagram. It states which part number cap screws have lock washers.
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3 years 9 months ago #224236 by Deebo
Replied by Deebo on topic Possibly silly question.. D4 2T oil pan bolts
Fantastic! Thank you very much, I didn't spot the notes.. I knew it was a silly question but maybe it'll stop other newbies embarrassing themselves..

Tony

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3 years 9 months ago #224250 by edb
Replied by edb on topic Possibly silly question.. D4 2T oil pan bolts
Hi Team,
would also suggest you check for excessive wear at the track frame ends of the spring and the brackets on each track frame that position the spring--excessive wear here and at the track frame outer pivot bearings can cause the spring to rub against the sump pan spring seat for and aft faces.
It maybe that these faces are excessively worn allowing the spring to contact the bolt heads in operation.

The jockey/auxiliary spring, links and system also help maintain equalizer spring location--operating without the auxiliary spring system can lead to a fatal outcome as they and the bolts/pin and sleeves on the track frame spring seat brackets stop the front of the tractor rearing up and over onto the operator as shown in the scan below.

Cheers,
Eddie B.
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3 years 9 months ago #224260 by Deebo
Replied by Deebo on topic Possibly silly question.. D4 2T oil pan bolts
Excellent info, Eddie, as usual! Thank you. I'll check that. The spring has been wearing against the sump of oil pan as there's an area with no paint in one corner so there's definitely movement due to wear. I'll try and hunt down some spring wear info and compare and contrast.. I do know of someone with spare spring so that might be the ultimate answer! Always learning..

Regards,

Tony
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3 years 9 months ago #224322 by rhartwick
Replied by rhartwick on topic Possibly silly question.. D4 2T oil pan bolts
Now I'm a bit nervous after edb's post and the flipped over dozer. I remember seeing pictures of similar fatal tragedies with D2's flipping over. What should I look for in my D2 to make sure there is not enough wear to cause this? If the ends of the leaf spring are inside their mounts on the track frame, is that ok? How much wear or telltale signs should I look for?

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3 years 9 months ago #224323 by dpendzic
Replied by dpendzic on topic Possibly silly question.. D4 2T oil pan bolts
make sure the keeper bolts are in and look for wear on the spring leaf and the bolts---i replaced the bolts on my D2 as it was an easy job also found one end of the spring was on top of the bolt---On my D4 found the most of the tie down bolts missing!
D2, D3, D4, D6, 941B, Cat 15
Hancock Ma and Moriches NY

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3 years 9 months ago #224329 by edb
Replied by edb on topic Possibly silly question.. D4 2T oil pan bolts
Hi Team,
not only do the main spring ends need to be engaged in the track frame seat brackets and under the retention bolt/roller but the Auxiliary spring and its full compliment of links need to be in place correctly so as to retain the main spring under the sump/pan--see scan below.

Very worn track frame pivot bearings and bar may allow the track frames to move outwards enough on a sharp turn to set the ends of the main spring beyond the limiting range of the retention bolt/roller and allow that end to disengage the retention area.

Hope this helps,
Cheers,
Eddie B.
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  7. Possibly silly question.. D4 2T oil pan bolts
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