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Jul 21st, 2025 | | | | Joined: Mar 2016 Posts: 170 'Bolter | | 'Bolter Joined: Mar 2016 Posts: 170 | So I've got the truck running well enough to move about my property, and I'm wanting to load it up with a lot of doug fir and hemlock limbs. I figure I should make sure the dump bed is up to snuff before I get too far. After cleaning it out, I was able to attempt raising it to full extension for the first time. It stalled at the second stage for a bit, but the sticky plungers broke loose OK and started raising. It was a bit herky-jerky, so I know there's a decent amount of air in there. I've cycled it a few times, but it doesn't seem to change much. It looks like my telescopic cylinders are bleederless, so I'm not sure what I can do. I suppose I ought to check the fluid level, but I have TWO fill plugs on the reservoir. What gives? Can anyone enlighten me? Thanks, Cylinder top
Reservoir
Reservoir tag
| | | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | Are the plugs at different levels? If so, those are "minimum" and "maximum" level plugs. Fill the reservoir to the level of the lower plug, cycle the hoist up and down a few times, and when you're sure you've purged all the air out of the cylinders, screw the lower plug in and add some more fluid until the level in the reservoir is close to the top plug.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Mar 2016 Posts: 170 'Bolter | | 'Bolter Joined: Mar 2016 Posts: 170 | Thanks for the response, but I'm not sure it applies. Can you see the pics in the first post? If not, the two plugs are both on top of the reservoir, at the same height.
The plug off​ to the left almost looks like it's part of some auxiliary or reserve tank. I don't know if that makes sense.
Last edited by pvfjr; 04/13/2017 11:34 PM.
| | | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | OK- - - -didn't notice the pic links before! I'd suggest raising the bed to its highest point, then supporting it with a piece of heavy pipe or some other strong prop to the ground (NOT the frame!) and checking to see how much fluid remains in the reservoir with a dipstick of some sort. If it's very low with the bed raised, add some fluid, leave the plug out, and lower the bed. If you've overfilled the tank, the excess will overflow. Don't do anything that requires you to lean over the frame without a safety device in place. A sudden failure of a hose could get deadly in an instant!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jul 2004 Posts: 2,946 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 2,946 | Ditto on the safety part. I knew a guy who got killed when a truck bed fell on him. Don't let that happen to you! | | | | | Joined: Mar 2017 Posts: 30 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2017 Posts: 30 | Got some better pictures of the Hoist? There was a hoist on my truck at some time but it was removed. I would like the re-install one. So any pics on how it was made would be welcome!
Thanks
'52 Cadillac Coupe de Ville (to be restored)
'56 GMC 450 (work in progress)
'79 GMC C15 (fully restored)
| | | | | Joined: Jan 2016 Posts: 264 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 264 | Could the one plug actually supposed to have a vent? Tank has to have one somewhere. | | |
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