CameronEldridge
Member
Hello guys! I have a 963B that we have been pulling our hair out on for quite some time. If I have this machine out on a job, you work it 3-4 hours, the boom gets extremely weak. For the first couple of hours, the machine operates flawlessly, lots of power and does great! Until it doesn't, the boom hydraulics start getting weaker and weaker, usually starts off slow and then within 30 minutes or so it will barely pick up the (empty) bucket 3-4' off the ground. We have changed the filters, suction hose, repacked cylinders, had charge pump rebuilt (the pump mounted to the gear case on engine). Still no luck. Machine has the 2 stick controls if that makes any difference. Any help would be extremely appreciated!