Cat MM55SR excavator

[Fred]

G'day all
A local contractor in town has purchased a MM55SR painted up in Cat colours, but I think it may be a Mitsubishi, either way it is a grey import as E1G00xx prefix doesn’t come up as a good serial # with Cat dealer. My mate needs to find a few parts, his biggest problem is that the hyd don’t work when levers are used, but if you move control valve direct they with work. The electronic hand control system seems to be the problem, anyone had any experience with these machines or this problem?

thanks in advance

[nork69]

Is there a way to find part for this excavator? In usa or canada?? Nachi Hydraulic pump ? ? If someone know something please help us me and Fred. Thanks

[gpap123]

A friend of me who owns a mitsubishi 5 ton excavator here in my country, replaced the electronic hand control to usual hydraulic controls because he could not find any parts. Of course he paid enough money...
I also have a c a t graymm and the only way to find parts is to use serials from cat catalogue.
So, you have to find out the similar to yours cat machine and match the parts serial. But this is also riski because serials do not always fit to the gray machines.

[cutting edge]

G'day all
A local contractor in town has purchased a MM55SR painted up in Cat colours, but I think it may be a Mitsubishi, either way it is a grey import as E1G00xx prefix doesn’t come up as a good serial # with Cat dealer. My mate needs to find a few parts, his biggest problem is that the hyd don’t work when levers are used, but if you move control valve direct they with work. The electronic hand control system seems to be the problem, anyone had any experience with these machines or this problem?

thanks in advance

That is a rebranded mitsubishi...as for the problem,is there a bad switch in the pilot enable lever perhaps?

[cutting edge]

Is there a way to find part for this excavator? In usa or canada?? Nachi Hydraulic pump ? ? If someone know something please help us me and Fred. Thanks

Ive seen that brand on smaller deere and hitachi excavators,mostly on valving though.

[farmer550]

Hi I have the same problem with my 55. The rams operated by the electrics keep cutting out. Did you ever find a solution.