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  1. E

    Komatsu D455A upgrades

    Hey guys, anyone here know when Komatsu upgraded the D455A to 650 HP and gave the tractor a redesigned operators cab/ROPS, such as what is shown in the attached image?
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    Liebherr 991 hydraulic system

    Have a question for the guys who've worked on the old 991's before. On a 991 there's two hydraulic reservoir tanks, one in front of each set of pumps on the right and left sides of the machine. I'm interested to know how this hydraulic system worked. Did these tanks cross-feed or were...
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    Liebherr 991 question

    So been doing some reading on this machine and would like to know what Liebherr excavator replaced the 991. I found two different answers from two different authors so I just figured I'd clarify and see if anyone on here knows. Was it the 991 replaced with the 992 or 994?
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