What do mean?
On the same pump skid?
Everything from engine to pump to pump rails to jumper hose to unloader to poly chain etc etc. I built an identical twin
Ive only seen rails mounted in this orientation is all. Wider on bottom (these arent mounted to anything as its a geardrive, but rails still on pump)
Seems too flexy. I did notice some play/movement when you played the 1st vid. But the slomo reallly looks flexy. I would consider strong square tubing with bolt acess and holes in all the right places to go with the rest of all that HD skid.
It has to be a bad shaft bearing to be honest its probably a bent shaft which caused the bearings to go bad. If you got it from a dealer they should replace it. I’m sure it was just a bad pump I dont know anything about legacy pumps but I hear good things if it was me I would replace it with a CAT. Just kidding I dont want to start the pump debate! Also check that your pulleys on the motor and the shaft are square and inline it doesn’t take much to make it wobble
Completely out of left field but does the pulley on the pump have a clutch or some other slip mechanism in it? If so that could cause what you are hearing under load?
This is what happened when you use poly chain setups without correct alignment. Or a loose base. That is the sound of the side of the belt rubbing on the pulley under load. The belt is trying to walk off the pulley . The wider the belt the more important it is to be perfect. I actually switched from 30mm belt to 9mm belts because it was more forgiving
sprockets are lined up perfectly. these poly chain belts move from one side to the other while running. Base as in the AL skid or pump brackets? I think the culprit is the pump brackets after looking at how much they give while under load. After all they are cheap a*s metal that is bent to form a bracket. Im going weld some square pieces inside the channels to lock it all up and make it “one” piece.
no clutch or other mechanism.
There shouldn’t be any movement in the poly chain especially side to side . Your brackets are probably causing that as well. Instead of welding up brackets. Have a machine shop put slots in two 1x1 squares aluminum bars. Will probably cost less than $50 and will be much more solid and last forever. That’s what I did on mine to clear 9” pulleys .
can you post a pic of your brackets?
Yah but not until this weekend. I’m working in Venice FL all week and that truck is working in palm harbor FL all week.
No problem. I’ll wait lol
I watched your video. Your probably right about just welding a plate on the side of those flimsy brackets
Was thinking of capping all 4 ends and maybe welding a piece or two inside the bracket itself


