Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

MrSteele

23D build

Recommended Posts

MrSteele

I am putting a new to me, and not very worn 23D engine. The cylinder has .0025 wear on its standard bore. The tractor it came off of has a front end so new and rarely used, that the spindles were rusted tight. Working a little penetrating oil in the freed them up. Was going to trash the frame, but, decided to give it another lease on life, when I get through swapping engines and building the 10 in my current tractor. 

But, back to the engine. Are there any secrets to building other than what I am accustomed to? Have the piston out, a new set of standard rings waiting to be installed. Ground and lapped the valves, still have to adjust the lash. Painting the block with high heat flat black paint. Even went so far as to paint the inside with Glyptol to aid in oil return to the pan, and front and rear oil seals. Was going to replace the original leather seals, but, since they were still pliable, have them sitting in SAE 30 oil, according to a Motion Industries tech. I have new rubber seals, but could not resist the leather! Other than rusted to death governor springs, the engine is complete, with a lot of surface rust that will have to be cleaned before painting of sheet metal. Was just a hint of carbon on the inside of the head.

From the looks of the bolts, no damage to the corners, etc. I think I am  the first person on the inside of the engine. I did shave .009 off the top of the block to clear up some corrosion near the exhaust valve. Will that much extra compression require 2 head gaskets to keep the rod from disintegrating under the higher compression?

Any help from those of you still running this engine will be appreciated. Going to start putting it back together tomorrow

Share this post


Link to post
Share on other sites
RAC

.009 off the deck should not require extra gasket. The compression ratio on flatheads is pretty low to start with. it's hard to get it to the point where it'd be a problem. The important measurement is piston to head clearance. If the piston is still just even with the deck+/- then the gasket is more than enough clearance for the RPM it'll be running (can probably get away with around .030). Have set up pulling singles running way higher RPM tighter than that.

  • Like 1

Share this post


Link to post
Share on other sites
gwiseman

It's been a long time now but I don't think there is anything that should be unfamiliar to you. I opened up the 23D (~2004) on my Early B-10 and found it to in very good shape so I cleaned it up, gave it new std rings, adjusted new governor springs, and cleaned the carb. Its one of my best runners today and, I just love the s-l-o-w idle sound of a 23D.  

Share this post


Link to post
Share on other sites
MrSteele

A good slow idle? OH BOY!!! Incentive to hurry. I have a ZZ on a homebuilt tractor that has net been started in about a year (Take it to the annual Octoberfest engine/tractor show). Started on 3rd pull, as always, but, you can idle it down to where you think it may not have enough in it to hit the next lick. With a straight pipe, it is awesome.But, I have an automotive muffler, and it just kind of bellows

  • Like 2

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Who's Online (See full list)

    • Bill725
    • SmilinSam
    • BLT
  • Today's Birthdays

    1. 720nut
      720nut
      (66 years old)
    2. Joe Scann
      Joe Scann
      (79 years old)
  • Recent Status Updates

    • Paul M.Murphy

      Paul M.Murphy

      Hello glad I got on this site. I hope to upload a couple of photos of my Simplicity Broadmoor 
      Model 707 Tractor. I have replaced all the belts on it and installed a new ignition switch.
      Have a mower deck which was in poor shape , repaced a couple of bushings and welded the
      deck where there was some holes. The tractor and mower deck came from a friend and the 
      mower deck metal was getting pretty thin. Some new metal was put in it and we also undercoated the underside of the deck. This was done by my friend Greg Toulman.
      I have not put the mower deck on the tractor yet, waiting for Greg to come home and give me a hand. Can you please tell me if there is a manual for the mower deck and where I could get one.
      I would also like to get some moon wheel discs as well.
      I will try and down load some photos of the tractor when my wife shows me how to. 
      I really love driving this tractor and also how well it is made compare today's tractors, especially the flexible rear end and the rollers.
      Tell the next time 
      Paul
       
      · 9 replies
    • jbrooks

      jbrooks  »  Talntedmrgreen

      Josh
       
      folowing  this from a link at the downloads.  I just rescued an AC 920 with the lambodini diesel. I can' t download  yet .  Where did you find the PDF copy you posted. . I would like to figure out how to adjust the injection pump. 
      I assume it's a bosche, correct
      · 0 replies
  • Adverts

×