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cat 955h track loader turbo oil line

cat 955h track loader turbo oil line

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hopy-dah
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A friend of mine has a old 955h track loader that the turbo went bad on. He is instaling a new mac turbo on it. The old turbo has a line coming off of the side of the turbo bearing housing that goes into the housing in back of the injector pump. Can anyone tell me what this line feeds? The mac turbo does not have a port for this line and he needs to know where to install this line or remove it.

Thank You for any help you can give us
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Thu, Nov 28, 2013 10:28 PM
Jason 10/D4
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Any turbo should have a feed oil supply line and a return maybe the return dumps into the injection pump to lube the gears just a guess here. Jason
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Thu, Nov 28, 2013 10:51 PM
hopy-dah
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Reply to Jason 10/D4:
Any turbo should have a feed oil supply line and a return maybe the return dumps into the injection pump to lube the gears just a guess here. Jason


Yes, it does have an oil supply and a return to the sump. It also a line off of the side of the old turbo that goes to what appears to be the injector pump housing. It doesn't appear to be a pressureised line as it just sticks into the housing.
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Fri, Nov 29, 2013 3:16 AM
d9gdon
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Reply to hopy-dah:


Yes, it does have an oil supply and a return to the sump. It also a line off of the side of the old turbo that goes to what appears to be the injector pump housing. It doesn't appear to be a pressureised line as it just sticks into the housing.
There was a field installation turbo oil lines group for some reason, maybe to add an oil cooler. Does it look like this?

[attachment=20664]955H turbo lines.gif[/attachment]

Or they changed to a 7M7254 turbo and changed it to look like this:

[attachment=20665]955H Field Install Turbo Lines.gif[/attachment]
Attachment
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Fri, Nov 29, 2013 3:59 AM
catsilver
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Reply to d9gdon:
There was a field installation turbo oil lines group for some reason, maybe to add an oil cooler. Does it look like this?

[attachment=20664]955H turbo lines.gif[/attachment]

Or they changed to a 7M7254 turbo and changed it to look like this:

[attachment=20665]955H Field Install Turbo Lines.gif[/attachment]
Attachment
Attachment
If myn memory serves me correctly, the turbo feed line goes in the top, there were two types ,early fed from a lube valve on the side of the crankcase cover, the later from the filter base, as per the parts book pages already shown, the drain line from the bottom went to the fuel pump mounting bracket and into the crankcase. Some models had an extra 'breather' line which was a gland nut ftting which came horizontally out of the turbo centre housing and also went into a brass fitting in the fuel pump mounting bracket. If the turbo only has a supply and drain, plug the hole in the fuel pump bracket for the breather. I expect OM can turn up the parts book pages for this.
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Fri, Nov 29, 2013 7:48 PM
hopy-dah
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Reply to catsilver:
If myn memory serves me correctly, the turbo feed line goes in the top, there were two types ,early fed from a lube valve on the side of the crankcase cover, the later from the filter base, as per the parts book pages already shown, the drain line from the bottom went to the fuel pump mounting bracket and into the crankcase. Some models had an extra 'breather' line which was a gland nut ftting which came horizontally out of the turbo centre housing and also went into a brass fitting in the fuel pump mounting bracket. If the turbo only has a supply and drain, plug the hole in the fuel pump bracket for the breather. I expect OM can turn up the parts book pages for this.


The oil feed comes from the bottom of the filter and the line from the bottom of the turbo goes into the back of the motor and apprears to drain into the sump. The line off of the center of the turbo goes into the housing by the injector pump. From what you are saying, we can just remove the center tube and plug the hole.

Thank you all very much
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Fri, Nov 29, 2013 9:02 PM
Old Magnet
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Reply to hopy-dah:


The oil feed comes from the bottom of the filter and the line from the bottom of the turbo goes into the back of the motor and apprears to drain into the sump. The line off of the center of the turbo goes into the housing by the injector pump. From what you are saying, we can just remove the center tube and plug the hole.

Thank you all very much
A s/n would help but it's pretty much as catsilver states. Oil supply from base of filter housing to top of turbo, Drain line to flywheel housing, vent line if it has one goes to the accessory drive housing.

Be sure to fill the turbo bearing housing with oil and roll the engine over enough to see flow coming out the supply line before connecting.
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Sat, Nov 30, 2013 9:38 AM
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