oceanobob
Senior Member
Any idea why the ram would have a shoulder on the tube and this shoulder would ride on a beefy trunnion - but why the clearance tween the trunnion and the cylinder?
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This topic is directed at a three ram Upright 24', battery over hydraulic, indoor scissor lift. Sometimes when almost at the lowered position it would hang up and not go all the way down and then there would be a bang when it settled. Snooping around could not find much to puzzle over and the occurrence was once in a blue moon.
But then it was observedi: the ram sometimes swings (actually slides) inside the trunnion and the result of this change occasionally allows it to hit a conflict and stop the completion of the movement. The corner of the elbow of the middle ram has been rubbing and there is a sign of some wear....yes missed this on prior looksees but the use of a pocket super LED flashlight (makes me feel like the DOT! LOL) helps focus the visuals. To maintain the improved relationship, temp tested by shoving a wood shim in the gap between the trunnion and the ram cylinder and will observe that for a time then maybe a more permanent locator such as a rubber collar or a plastic sleeve.
Yes the gap tween the trunnion skirt is a bit less than 1/4". Would have expected like 1/64 or so. This condition seen on all three rams and not the idea this has worn elliptically. Never contemplated the ram would have a shoulder and that it rested on the trunnion - figured the trunnion was part and parcel of the ram. But some viewing on browser indeed shows some pics of shoulders on ram tubes.
This machine gets greased and cleaned/checked out regularly and have not seen any zerks not take lube or other oddities. Is this a normal fitment issue for a trunnion to shoulder style ram or is is an Upright unique fitment issue? Seems odd they allowed this much room for fitup. Should be 4 pics in this post. The machine, the trunnion, the worn corner on the elbow, and the shim in the gap (pic is looking up at the bottom of the trunnion skirt).
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This topic is directed at a three ram Upright 24', battery over hydraulic, indoor scissor lift. Sometimes when almost at the lowered position it would hang up and not go all the way down and then there would be a bang when it settled. Snooping around could not find much to puzzle over and the occurrence was once in a blue moon.
But then it was observedi: the ram sometimes swings (actually slides) inside the trunnion and the result of this change occasionally allows it to hit a conflict and stop the completion of the movement. The corner of the elbow of the middle ram has been rubbing and there is a sign of some wear....yes missed this on prior looksees but the use of a pocket super LED flashlight (makes me feel like the DOT! LOL) helps focus the visuals. To maintain the improved relationship, temp tested by shoving a wood shim in the gap between the trunnion and the ram cylinder and will observe that for a time then maybe a more permanent locator such as a rubber collar or a plastic sleeve.
Yes the gap tween the trunnion skirt is a bit less than 1/4". Would have expected like 1/64 or so. This condition seen on all three rams and not the idea this has worn elliptically. Never contemplated the ram would have a shoulder and that it rested on the trunnion - figured the trunnion was part and parcel of the ram. But some viewing on browser indeed shows some pics of shoulders on ram tubes.
This machine gets greased and cleaned/checked out regularly and have not seen any zerks not take lube or other oddities. Is this a normal fitment issue for a trunnion to shoulder style ram or is is an Upright unique fitment issue? Seems odd they allowed this much room for fitup. Should be 4 pics in this post. The machine, the trunnion, the worn corner on the elbow, and the shim in the gap (pic is looking up at the bottom of the trunnion skirt).