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HD5 Question

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=109631
Printed Date: 19 Jul 2025 at 7:16am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: HD5 Question

Posted By: creeperfreak
Subject: HD5 Question
Date Posted: 29 Jul 2015 at 9:04pm

How much weight can an HD5G safely carry on its back? I just picked-up a smokin deal on a Kelley B70 3-point backhoe with the intention of adapting it to fit my track-loader, but I'm concerned the 2,000 lb weight might be too much for the Allis axles and bearings.

Replies:

Posted By: Coke-in-MN
Date Posted: 29 Jul 2015 at 10:17pm

It should handle it well - only problem will be to mount you will need to remove counter weights from HD5 and use a tool carrier of some type to mount onto back case .

Another problem is the HD 5 hyd pump might not be high enough pressure for hoe , the flow rate of 5 G is 32 GPM but at about 1200 to 1500 lb pressure .

Rear axles on the 5 have 3 sets of bearings - outside at the truck frame - inside at case by sprocket and inside under machine - outboard of rear case .

My HD4 only had 2 sets of bearings at sprocket and inside under machine and I had a AC 650 backhoe on that .

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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."

Posted By: creeperfreak
Date Posted: 31 Jul 2015 at 8:50pm

Thanks, Coke. Youre right about the hydraulics, Kelley calls for a min. pump out-put of 2000psi/6-9gpm. The ideal solution here would be a two section pump, but i'll probably mount a second pump to handle the backhoe.

Posted By: Coke-in-MN
Date Posted: 09 Aug 2015 at 7:42am

Another way would be to take hydreco pump and replace it with higher pressure pump - then use diverter valve or relief valve for loader frame and separate one on hoe .

OR larger cylinder bore on new hoe to work at lower pressure .

Posted By: partswapper
Date Posted: 26 Aug 2015 at 6:25pm

hey coke quick question on a hd5b just put all new steering clutches soup to nuts . I recently picked up a pto driven winch . wanted to try and find pto shaft assy and install before I put fuel
and and all back on. also need bearing info for the steering levers any Ideas? any help much appreciated

Posted By: Dozer
Date Posted: 27 Aug 2015 at 3:36pm

The bearings on the control levers should be available from a bearing supply house. I replaced mine with "oilite" bushings. I have also replaced other bearings and bushings by making them from teflon or delren.
I recently repaired a steering cylinder that I could not get parts for by making the piston seals.