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Cat 277 main case drain filter???

AdamsExcavating

Well-Known Member
Joined
Oct 6, 2010
Messages
50
Location
USA
Just had a drive motor Repaired on our '01 277 mtl and was told to change out the main case drain filter (and hydraulic oil) due to contamination from the faulty hydraulic drive motor. This is said to be different from the hydraulic spin on cartridge filter. does anyone know what is being mentioned and where I can find it? Thanks.
 

Mobiltech

Senior Member
Joined
Jan 14, 2014
Messages
1,680
Location
Sask.
Occupation
Self employed Heavy duty mechanic
I've never seen a case drain filter on one either just the main spin on.
 

caterpillarmech

Senior Member
Joined
Nov 7, 2011
Messages
533
Location
Florence Texas
Occupation
Field Service Supervisor
There is a screen inside the tank. I would drain the tank, pressure wash the tank, and replace the screen. This is till not a 100% clean out. You will still have oil in your lines and cylinders.
 

Nige

Senior Member
Joined
Jun 22, 2011
Messages
28,984
Location
G..G..G..Granville.........!! Fetch your cloth.
There is a screen inside the tank. I would drain the tank, pressure wash the tank, and replace the screen. This is till not a 100% clean out. You will still have oil in your lines and cylinders.
Looking at the Parts Manual and the Hydraulic Schematic that was all I could see as well. Having double-checked for your particular Serial Number I can now confirm that.

As Mobiltech says you're going to have to drain and pressure wash the tank and clean the screen (#7 in the illustration below) while you're at it, then try to get as much oil as possible out of the cylinder and travel motor circuits. You'll need plenty of buckets and cleaning materials, this could get messy in a real hurry........

277 Hyd Tank.jpg
 
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