D17 Series 1 hydraulic pump question
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=197016
Printed Date: 25 Sep 2024 at 9:26am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: D17 Series 1 hydraulic pump question
Posted By: DaveKamp
Subject: D17 Series 1 hydraulic pump question
Date Posted: 04 Sep 2023 at 6:16pm
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Hey Guys- So my D17 Series 1's rear lift has ceased function, and the reservoir is low, I added a little bit, and it operated slightly, and the reservoir level fell, and the rearend level went up, so I got the typical blown hose or cylinder seal. Which I'll make a 'winter project' of... but for the moment, I need it for other things. The issue I forsee, however, is that the pump is a demand-control device which is mechanically unloaded when pump pressure hits the unloading limit. In most contexts, this means that a pump that has insufficient source fluid will never reach unloading pressure, hence it will continue to TRY to pump, sans fluid, until there's nothing left of the pump. I SUSPECT that this might be the case of the D17 Series 1's setup, and I do NOT wish to damage the pump, so what I've done is placed the lift lever in the full DOWN position, and added fluid to the reservoir, to keep that pump wet. Is this a satisfactory action for the pump's actual operation, or is it unnecessary, or is it futile? Will the pump burn up ANYWAY, or will it be fine regardless?? I'll be using it with the backhoe attachment for the next two months-or-so, which absolves need for the lift or high-pressure system, because the backhoe runs off PTO pump.
------------- Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest. |
Replies:
Posted By: steve(ill)
Date Posted: 04 Sep 2023 at 7:22pm
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normal mode of failure is the hose to the cylinder... or could be the cylinder seal.. Either way, if you DONT MOVE THE LEVER, you should not be putting oil to the hose / cylinder and therefore no oil transfer ......... right ? ------------- Like them all, but love the "B"s. |
Posted By: DaveKamp
Date Posted: 04 Sep 2023 at 7:25pm
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Yeah, I got that part, I've watched a few disassembly videos. I've got SOME fluid in the reservoir, and the handle tied down. Will that be sufficient to keep the pump safe 'till I finish my digging and shop this piglet? ------------- Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest. |
Posted By: DrAllis
Date Posted: 04 Sep 2023 at 7:34pm
| Should be. Keep an eye on the oil level. Disconnect the line beside the seat and cap it for absolute fix. |
Posted By: DaveKamp
Date Posted: 04 Sep 2023 at 8:13pm
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Ah... excellent... YES! Thanks guys! I'm gonna bearings/seals the finals, brakes, and rearend, as well as PTO shaft, seein's how I gotta get in there anyway. Probably put a diverter/selector on the feed pipe as well, just for future options. I don't know what it would be, but Murphy's Law says that if I don't, I'll wish I had someday...  ------------- Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest. |