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Discussion Starter #1
I am going to jump on the slides, but for sake of argument..what is this?

Oil coming from here.
 

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Discussion Starter #3
it is the heat exchanger, do you have to remove header??
 

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Its the O-ring on the heat exchanger i bet, and yes you do need the space.
 

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Yes you do need to take the headers of to get it fixed.

New rings and gasket sealant should do it.
 

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Discussion Starter #7
Fun. Guess I know what I am doing tomorrow...

Where do you you get the parts? Any alternatives to MV? Or snail mail via MV...
 

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Get the old ones out, and go to local hydraulic shop, they are nothing special.
Or you can order from McMaster-Carr if you have trouble finding local.
 

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Discussion Starter #11 (Edited)
I am only seeing the one washer -metal at the main bolt (center), and the inner large rubber/silicone one on the heat exchanger module itself.

OMW to McMC
 

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Discussion Starter #12 (Edited)
Also guys, porfavor, not seeing TQ required for this online.

got it

Install the heat exchanger with the O-Ring and lock the
support screws at a 10 N·m torque, the exchanger aluminium
screw at a 15 N·m torque.
Always replace the aluminium seal washer at reassembly.
 

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There are more rings when you take the "leg" of the block. But if you are confident that the leak only comes under the exchanger, there is no need to go further.
 

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Discussion Starter #14
Well, ran into a issue.. no local McMaster around here..and Grangier was useless.

My local MV shop just stopped carrying MV 2 months ago...

So got a part number by chance for the McMaster-Carr?

I am looking at ordering OEM at this point too..

+(
 

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Find a shop that repairs excavators, they use lots of those big O-rings on main pump assemblies and shafts, im amazed if you dont find what you need from an Caterpillar or Volvo excavator repair shop.
 
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