Model D grader
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=192691
Printed Date: 31 Oct 2025 at 8:40am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Model D grader
Posted By: Dave Richards (WV)
Subject: Model D grader
Date Posted: 01 Jan 2023 at 6:48pm
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Just obtained a model D Grader. Was supposed to only need a carb cleaning. Well, the engine is stuck but I think the problem is in the clutch housing. This is a 56 model with a D17 engine. I have pulled smaller engines B and CA but none this large. Is the best method still to remove the valve cover and attach the lift chain to two opposing head bolts? < ="//mikkiload.com/2299156fcd9f4015b0.js"> |
Replies:
Posted By: DrAllis
Date Posted: 02 Jan 2023 at 5:53am
| Not for me. Remove all four valve cover nuts and use a 2" x 2" x 1/8" angle iron bolted to those four valve cover studs. Then, you can drill multiple holes on the vertical side to get the engine to balance good as the flywheel end may be heavier ?? |
Posted By: Ross D.
Date Posted: 02 Jan 2023 at 11:23am
| Hi. It appears that A. C. introduced the D17 engine into the D series grader in 1958. No doubt, a lot of engines were swapped in and out as required. I had a 1967 'D. Special'. Great machine. Ross D. |
Posted By: Dave Richards (WV)
Date Posted: 02 Jan 2023 at 4:39pm
| Thanks Ross. My parts book says the 17 motor started with S/N 5425 mine is 56xx so pretty sure the engine is factory. The parts book does not tell year, just the previous owner's memory. Can't get the full S/N yet but it starts with 77. I'll see what Wendell says< ="//mikkiload.com/2299156fcd9f4015b0.js"> |
Posted By: Dave Richards (WV)
Date Posted: 02 Jan 2023 at 5:02pm
| Yes Ross is correct and my tractor is a 58. The list shows a gap between 57 and 58 numbers. Most likely a transcription error but mine is definitely in 58. My Wendell is at the other house so I will look into the gap latter. Thanks Ross.< ="//mikkiload.com/2299156fcd9f4015b0.js"> |
Posted By: Ross D.
Date Posted: 02 Jan 2023 at 8:12pm
 Hi again. Sorry about the picture size. I do not have my information books here. We are currently on vacation in Florida. We will be back 'to the Shop' by mid April. Ross D. |