1978 ac 715D backhoe
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=151654
Printed Date: 30 Oct 2025 at 9:09pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 1978 ac 715D backhoe
Posted By: copperhead1971
Subject: 1978 ac 715D backhoe
Date Posted: 29 Jun 2018 at 8:48am
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not sure of date but was fun trying to figure stuff out about it and that is how I found this forum ... there will be lots of questions and it looks like the place to ask them.. as soon as I can figure out how to post pics I will.. where is the best place to find parts for it in North America ? |
Replies:
Posted By: CAL(KS)
Date Posted: 29 Jun 2018 at 9:36am
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http://www.minnpar.com" rel="nofollow - http://www.minnpar.com probably you best bet besides salvage. should be parts books there also for that model
------------- Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20 Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15 |
Posted By: Coke-in-MN
Date Posted: 29 Jun 2018 at 1:41pm
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The machine was handled by MINNPAR in Mpls MN as the stocking distributor of OEM parts for the machine and still has access to some things Other parts can be found through other dealers like Perkins for engine and such , there are a couple individuals on here that also can supply needed parts for repair also for clutch parts for fwd/ rev clutch pack . Other things like hydraulic cylinders, seals , and packing can be found at local shops that do that type of work as parts are common sizes for industry. Not a lot of the machines out there but those of us who have them - like them both for the work they can do for the price we paid for them . ------------- Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel. |
Posted By: copperhead1971
Date Posted: 29 Jun 2018 at 3:44pm
  thanks for the replies |
Posted By: copperhead1971
Date Posted: 29 Jun 2018 at 3:53pm
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never owned or used a backhoe before ... but breaking stuff i have lol |
Posted By: copperhead1971
Date Posted: 30 Jun 2018 at 10:01am
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Does anyone know what kind of hydraulic connection or type of connection they used on my 715 D? BSP distinguishes between two types of threads. These are parallel threads (BSPP), which have a constant diameter, which are known a G threads, and taper threads (BSPT), whose diameter increases or decreases along the length of the thread, known as R threads. IC fittings, defined by the SAE J514 and MIL-F-18866 standards, are a type of flare fitting machined with a 37-degree flare seating surface. JIC (Joint Industry Council) fittings are widely used in fuel delivery and fluid power applications, especially where high pressure (up to 10,000 psi) is involved. also this was interesting to but now adds more questions then it answered https://www.hydraulicsdirect.com/Fitting-Thread-Chart-s/1934.htm" rel="nofollow - https://www.hydraulicsdirect.com/Fitting-Thread-Chart-s/1934.htm   |
Posted By: DMiller
Date Posted: 30 Jun 2018 at 11:42am
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Most all will be JIC, as far as my Allis machines are. Allis also used a typical hydraulic pump mounting as their AG tractors that Coke can illuminate on as to breaking or cracking. |
Posted By: Calvin Schmidt
Date Posted: 30 Jun 2018 at 8:43pm
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I hate to spoil the party but what you have in the picture is an early 715 from the late 70's. It will have the Perkins 236 engine. The rear end is Ford. 715B had the self leveling bucket and loader control a floor mounted long stick. I've owned both and currently have a 715B. The 715C was the same with the Allis 200 cu.in engine with a turbo. Late 715C were branded CDS, A 715D with have a Cummins engine and be a CDS. ------------- Nothing is impossible if it is properly financed |
Posted By: copperhead1971
Date Posted: 30 Jun 2018 at 9:13pm
but front bucket lifting cylinder positions don't look like the B or C
and pics I have seen would have the 2 one on top of each other this one
has one in front of the other.. plate looks like somebody sand blasted |
Posted By: copperhead1971
Date Posted: 30 Jun 2018 at 9:28pm
| is there anywhere else to find date or ser #s on this backhoe? |
Posted By: Coke-in-MN
Date Posted: 30 Jun 2018 at 9:38pm
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Mine is a 715 B - D 1981 year - late style cab , perkins 234 , also digmore extenda hoe , was plumbed for a compactor and or hammer with aux valve . Bought from City as they had 2,000 hours on it but time frame for replacement was up , could only have so many years on any equipment and must be replaced . ------------- Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel. |
Posted By: Coke-in-MN
Date Posted: 30 Jun 2018 at 9:45pm
My 715B date tag and srl # on the plate on frame by oil tank (black plate showing)If you kind of look under the lift cylinder you can see the brace for the hydraulic pump , chrome piece, the pumps will crack mounting area in the front timing casting unless the update kit is installed or like I did brace pump to something solid to prevent movement . ------------- Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel. |
Posted By: copperhead1971
Date Posted: 30 Jun 2018 at 9:45pm
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not bad for age and hours .and most city equipment would be cared for better then some business ones... and pics are always welcome too if you have any. also pics of the pump fix close ups to would be great |
Posted By: Coke-in-MN
Date Posted: 30 Jun 2018 at 9:48pm
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Was looking for the brace photos - thought i had them on here - might check back in older posts as they were on here at one time ------------- Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel. |
Posted By: copperhead1971
Date Posted: 30 Jun 2018 at 9:55pm
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does the plate or id plate i posted make any scents to you? |
Posted By: Calvin Schmidt
Date Posted: 01 Jul 2018 at 1:02pm
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Serial 1282 will make it a 1974 model. ------------- Nothing is impossible if it is properly financed |
Posted By: copperhead1971
Date Posted: 01 Jul 2018 at 4:44pm
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so what your telling me I have bought the wrong manuals lol ? Allis Chalmers 715 Dsl Backhoe/Loader Parts Manual Allis Chalmers 715 Dsl Backhoe/Loader Operators Manual Allis Chalmers 715 Diesel Backhoe/Loader Service Manual |
Posted By: Calvin Schmidt
Date Posted: 01 Jul 2018 at 7:27pm
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Looks like you likely have the correct manuals . Dsl likely refers to diesel ------------- Nothing is impossible if it is properly financed |
Posted By: copperhead1971
Date Posted: 01 Jul 2018 at 9:24pm
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i hope so they are not free lol thanks for all the replies in another week or so back up north to go play with my backhoe again i can't wait |
Posted By: copperhead1971
Date Posted: 06 Jul 2018 at 5:19pm
can anyone tell me what size JIC connection it is on lift cylinder 1/2"
or 5/8" . also size of supply line hose ... i am 400 plus miles away from it and didn't remember to check
before I left... thanks 
|
Posted By: copperhead1971
Date Posted: 26 Jul 2018 at 6:07pm
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back from up north ended up putting a 3 foot rubber line on in place of the broken steel line,,, front bucket needs repair now and one stabilizer cylinder needs to be re-welded started leaking fluid ... Is there a place to cross part number .. I know the engine oil filter is a PH8A but there is a transmission , hydraulic and fuel filters .. the parts numbers in the book i have don't always come up with anything... thanks |
Posted By: DMiller
Date Posted: 26 Jul 2018 at 7:24pm
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Went to Baldwin Filter company page I use, NAPA Numbers are 1806 Oil, 1515 Trans, 3166 Fuel and 2222 Air. Baldwin numbers by App: BT216 Oil, B2 Trans, BF825 Fuel and PA1667-FN Air. PH8A is INCORRECT for the Perkins, thread and seal size will fit but NOT correct application. 1806 is designed for the engine in it. 1515 is a interchange to PH8A for the trans. |
Posted By: copperhead1971
Date Posted: 27 Jul 2018 at 4:27pm
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that is what the seller told me .. good thing there are places like this forum. some info is just plain hard to find and the right or correct info harder lol thanks DM for the ifo |
Posted By: Coke-in-MN
Date Posted: 27 Jul 2018 at 5:52pm
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been using the PH8A since i got the machine and that is what they used on it when i got it also . ------------- Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel. |
Posted By: copperhead1971
Date Posted: 27 Jul 2018 at 6:35pm
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found a few filter cross reference links http://www.oilfilter-crossreference.com/" rel="nofollow - http://www.oilfilter-crossreference.com/ http://www.airfilter-crossreference.com/" rel="nofollow - http://www.airfilter-crossreference.com/ http://www.fuelfilter-crossreference.com/" rel="nofollow - http://www.fuelfilter-crossreference.com/ |
Posted By: david a
Date Posted: 29 Jul 2018 at 7:20pm
| what is a good source for clutch parts. I need gaskets for my 816 |
Posted By: copperhead1971
Date Posted: 01 Sep 2018 at 12:08pm
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made it back from up north and had to replace 4 hoses and it ran great other then that but now need to find parts for the back digging bucket... lost a tooth off of it just need to find another one and a pin parts numbers pin 2017635-0 and tooth 2017636-8... where is the best place to find this part?...thanks |
Posted By: Coke-in-MN
Date Posted: 01 Sep 2018 at 5:54pm
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Teeth on mine I bought at JD dealer - depending what type of shank is on the bucket - there are pin type , and there are clamp type - shank size to fit tooth vary - another of the book might not be right things - ------------- Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel. |
Posted By: copperhead1971
Date Posted: 01 Sep 2018 at 10:09pm
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thanks for the reply coke... i had some pics of backhoe from last trip up north but no-one knows what happened to the sd card likely still sitting on table up north... the bucket looks to be original to the backhoe ,, i m assuming the part numbers would work if they could be crossed... by parts manual it didn't matter what bucket you got the teeth were the same except for the number of how many were on the bucket |
Posted By: Jim.ME
Date Posted: 02 Sep 2018 at 6:44am
| Along with John Deere, Case and a number of others used that style tooth group with the flex pin holding the tooth on. |
Posted By: DMiller
Date Posted: 02 Sep 2018 at 7:19am
| Have seen almost every ground engagement tool supplier tooth or cutting edge on every machine except Cat, can pretty well replace a lost tooth head on a shank from any distributor so long as you find a knowledgeable parts man that can recognize the types. |
Posted By: Coke-in-MN
Date Posted: 02 Sep 2018 at 10:19am
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I have a 12" trench bucket from a Ford I modified to fit machine and it takes a small tooth that you use a ball peen hammer to dimple side to attach to shank - on the AC bucket 32" the split pin with rubber center holds tooth to shank . Bought a couple frost teeth to use along with the standard teeth . ------------- Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel. |
Posted By: Chris Dame
Date Posted: 12 Apr 2023 at 9:51am
| Would anyone have a 1002958 valve assembly for 715D backhoe? Mine is cracked |