WD & 45 Engine Differances
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=110709
Printed Date: 19 Jul 2025 at 4:45am
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Topic: WD & 45 Engine Differances
Posted By: housemover
Subject: WD & 45 Engine Differances
Date Posted: 20 Aug 2015 at 1:09am
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What are all the difference's that set the 45 Engine apart from the WD and was there really a hybrid tractor in late 1953 & 1954? I own one with "53" ser# (which should make it a WD ) but it has a 45 trany , 4 bolt wide front axle & the wider rear wheels for 14.9X28 tires. Yet the engine has a plate on the side of it!!! I"ve been told some came that way ,even with a 45 crank in the old block. Any imput from the older section Thanks '
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Replies:
Posted By: Josh Day
Date Posted: 20 Aug 2015 at 5:31am
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The plate on the side of the motor is a WD motor, in the later part of 1952 they started with the newer constant mesh trans, ( curved shifter) pre 52s the had the older sliding gear ( straight shifter). The four bolt wide front didn't come out until late 55 I believe when they came out with the 45 diesel . So someone has changed yours out. ------------- AC's 75' 7040, 64' D-17S4, 55'WD-45, 54' WD-45, 53' WD-45, 53' WD, 52' CA, 36' WC. IH 656. Deere's 38' A, and 47' A |
Posted By: Josh Day
Date Posted: 20 Aug 2015 at 5:34am
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I think (I need to read again) but I thought that there were a few 45s made that had WDs ser# on them in late 53 as they were switching over. ------------- AC's 75' 7040, 64' D-17S4, 55'WD-45, 54' WD-45, 53' WD-45, 53' WD, 52' CA, 36' WC. IH 656. Deere's 38' A, and 47' A |
Posted By: stu(ON)
Date Posted: 20 Aug 2015 at 6:53am
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Obviously not my research: http://forums.yesterdaystractors.com/viewtopic.php?t=1008655&sid=d4e7fbffdab1f8fd594dbb3ea5471b04" rel="nofollow - http://forums.yesterdaystractors.com/viewtopic.php?t=1008655&sid=d4e7fbffdab1f8fd594dbb3ea5471b04 |
Posted By: BennyLumpkin
Date Posted: 20 Aug 2015 at 9:26am
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Serial 127007 was when the curved shifter and constant mesh transmission went in to production. I forget the first serial for WD45 but it was midvto late 1953. The 4 bolt wide front someone added because they didn't come out until 55 like stated above to accommodate the weight I'd the 45 diesel. ------------- Central PA Allis Express 1934 WC254 1945 WF 1945 WC135755 1951 WD68085 1953 WD45-150217 1957 WD45D-230744D B110 |
Posted By: CTuckerNWIL
Date Posted: 20 Aug 2015 at 12:12pm
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As far as the engine itself, you can easily drop a 45 crank in the 201 block, put 45 pistons in and have basically a 45 engine. Without checking your crankshaft, there is no way of knowing what you have. All things can be altered as your wide front has been.
------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: WF owner
Date Posted: 20 Aug 2015 at 12:45pm
| WC, WD and WF had the 3" head and were 201 cubic inch. WD-45 had the 4" head, along with being 226 cubic inch. |
Posted By: housemover
Date Posted: 20 Aug 2015 at 2:42pm
| WOW ,thanks for the help guys! Just a little follow up as I said the Ser# is 134825 which should make it a 1953 & it has aside plate on the block. But it has a 4" head, a 45 manifold & carb & late model cast dist. housing. Yet there is no bypass hose from the water pump to the hesd. If it weren't for the block plate & Ser# the entire rest of the tractor has 45 charactoristics grill shutters, trany,fender height,wheel width, etc. Maybe it's a change over hybrid, or some old farmer (like me) spent all his extra time out in the shop up dating his Equipment. Keeps me out trouble with the wife & out of the bars! THanks ; Housemover |
Posted By: AaronSEIA
Date Posted: 20 Aug 2015 at 3:27pm
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Pretty sure the shutters were a WD only thing. The 45's don't even have the hole in the hood for them. My WD has a 45 crank, carb, air cleaner, and head. Over 60 years of replacing makes Charlie 100% right. No telling what is in one till you tear it down. AaronSEIA |
Posted By: DrAllis
Date Posted: 20 Aug 2015 at 4:33pm
| Late model WD's had the taller WD-45 cylinder head from the Factory and no bypass hose was used on the thermostat. This happened at WD engine s/n 289,000 & up. Your chassis s/n is 134,825 which makes it a 1953 model WD (bent gearshift/constant mesh trans gears), not a WD-45, so it should have a WD block in it. WD-45's started at s/n 146,607 and went on to 235,000 or so. The fact that it has a WD45 manifold is of no consequence, as that is what is commonly available and directly replaces a WD manifold. It would be interesting to see which carburetor and air cleaner it has.....WD45's are different than a WD. |
Posted By: TedBuiskerN.IL.
Date Posted: 20 Aug 2015 at 7:22pm
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Actually the 4" head came out on the WD in mid 51. ------------- Most problems can be solved with the proper application of high explosives. |
Posted By: housemover
Date Posted: 20 Aug 2015 at 11:39pm
| Started rewireing today for 12 Volt on the 53 WD. Going to leave the coil & starter alone (puting a resistor on the coil). Going to leave it "positive ground" like my D-15 II & D-17 IV . But can"t deside wether or not to use a generator or alternator But I sure hope to not alter the lower part of the radiator cowl! Has any of you been through this process? Thanks ; Housemover |
Posted By: Gerald J.
Date Posted: 21 Aug 2015 at 1:07am
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Positive ground alternators have been made but are uncommon. Alternators came into use after the SAE standard demanded negative ground as did solid state radios. I have a very large Leece-Neville that can be used either polarity but the common Delcos won't turn up positive ground though the Delco manual includes them. Gerald J. |
Posted By: DougS
Date Posted: 21 Aug 2015 at 9:34am
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If you're interested in form, go with positive ground and use a generator. If you're interested in function, go with negative ground and use an alternator. If you change the polarity remember to swap the ammeter and coil leads. |
Posted By: housemover
Date Posted: 21 Aug 2015 at 9:52am
| Doug, I under stand that the ammeter would read wrong, but why the coil leads? Housemover |
Posted By: DougS
Date Posted: 21 Aug 2015 at 10:27am
You want the spark to jump from the inner electrode to the outer electrode of the spark plug. The inner electrode is made of a metal that is less likely to erode. If you don't switch the coil polarity the spark will jump backward, eroding the outer electrode. Edit: You could purchase double platinum spark plugs and it won't matter, but why spend the extra $$ when you don't have to? |
housemover wrote:Posted By: DrAllis
Date Posted: 21 Aug 2015 at 10:59am
| If you change battery polarity, ammeter polarity and you must also change the coil polarity. If you don't change the coil, the ignition point life is drastically reduced. |