My ERC040 Electric has started knocking when I start the hydraulics. By knocking I mean that when the hydraulic motor starts, it pops hard - like a whack with a hammer. As soon as the motor comes on - BANG - but if I operate the hydraulics quickly, there is no knock after the initial knock, provided I don't let the motor rest too long (let the pressure drop too much).
I suspect there is some kind of adjustment that softens the startup, such as an initial pressure relief on motor start. I think the motor is currently supplying 100% hydraulic pressure immediately on start. It used to start smooth and quiet. Has anyone adjusted this setting and can you tell me where it is if you have? Thanks in advance.
Showing items 1 - 7 of 7 results.
yep garland it could be a motor mount.
i also thought about the coupler at the pump too, if it's loose that might make it knock. I'd definitely check those mounts first though.
Yeah Swoop,
That is definitely the hyd motor mount. The older units do it all the time. Battery removal is the easiest way to check. You can jack the lift up, block with wood and push on the bottom of the motor. It will pivot a little, but a bad mount will let it go up and down. Good Luck
oh boy, a military built lift.. that explains why i don't have that one.
gonna have to give me a bit to get that, i don't have access to that system till monday. i'll get back to you asap.
one thing i might need to know is what type of controller is in it, (it could be either AC drive or DC drive, and if you can put eyes on the pump motor is it enclosed or does it have vents on it? if you can see the tag on the motor maybe a part number? anything would be helpful. If not that's ok.
OK.. here it is
ERC040AHN36TE084
Ser# B814N01865C
I bought it from DECA at Edwards AFB after the battery leaked on the motor and locked the robot. It has been very handy here at my office
Jerry
whats the whole model number? (and serial if you have that)
I think you might be right. It is only on start. Thanks for the response. I will see what it takes to remove that motor and replace the coupling. It is odd that it was so sudden. Usually a keyway takes time to come loose. Or maybe it is like a lovejoy and the rubber spider has failed. I wish I had a parts breakdown.
JB
that knock is either the motor mount or maybe the coupler between the motor and the pump.
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