(800) 853-2651
SHOP NOW

Minneapolis mm Ztn.

W

Wes Verbal

Member
Hello, i have purchased a Minneapolis moline
ztn model was wondering about the engine
manifold and intake on these models.ive
noticed that the tappets and guide are
horizontal in this engine... my question is
does the manifold and intake drop from the
top of the engine straight to the Pistons
and guides or does it have a separate area
from where it channels up, havent had a
tractor with this kinda manifold coming in
at the top of the engine area?does anyone
have a cut out view of this ?
 
These are sidevalve flathead engines. The valves and ports are above the cylinder and the cylinder is partially blocked from the top. The pistons come out the bottom. The intake airflow drops down through the manifold vertically, then turns horizontally through the ports and valves, then vertical again to the cylinder and piston. The exhaust is just the revers of course.

The valvetrain is very simple. The rocker arms run directly on the cam lobes and directly operate the valves. No lifters.

It's a simple and efficient design. The only drawback I have found is that it takes specialized equipment to bore the blind cylinders if they ever need bored out.
 
Reason ask is i cut the old muffler down to mount a new one to tractor and had some piece of metal fall into manifold area i took a shop vac to it along with magnet stick.. was worried they would find there way down manifold to engine 😯
 
If you lost something in the manifold, I would suggest taking the manifold off and trying to find it. hopefully its still in the exhaust port in the head and hasn't fallen past the exhaust valve into the cylinder. Most likely its in #2 or #3 exhaust port or in #2 or #3 cylinder. That's where the water goes when it rains in.

You can get exhaust gaskets from Welters, 417-498-6496, Wendell Everett 740-322-3335, and external_link.com among other places.
 
Well its really nothing major i dont think... i cut the old muffler off and with saw zaw to put on a striaght pipe and before doing so i pushed a rag down into manifold a ways to keep out the small debris.... and what stuff that fell in i used a shop vac and magnet to remove... i was just hoping most of the small little piece "would if they fell in" just blow out as i drove the tractor. I did take each plug out and swab inside area just to.make sure.
 
external_link.com website has not worked for some time. Maybe Charlie could put in a few words here.
 
When I brought my '48 ZTN home, it had a straight pipe on it. It was deafening. My neighbors from 1/2 mile away commented on it. Driving the beast around for 30 minutes would give you a headache. I've got a dozen old tractors in the collection, many with straight pipe exhausts. A ZTN is not one of them.
Put a factory style muffler on it. It's my favorite sounding tractor in the collection. Do yourself a favor and get a muffler.

Suggest you adjust the valves when you have time. I have a ZTN and RTN. Both had tight valves when purchased. It's easy to do and just might make it run better.
 
Just to add, if it was the original dual fuel exhaust manifold I dont believe that would go straight down into the cylinders because they have a heat riser valve on them.
 
Hummmm i see now yeah... a shut off valve.... in the manifold. ....my is a 1948 lioks be all original so not really sure if has one not??
 
If there is a piece that has two bolts (one to the front-radiator side and one to the back-fuel tank side) and has hot / cold on it (if I remember correctly), that is the heat riser valve. If it is a later manifold like what was used on a G4 MM combine it is all one piece.
 
Here is a phantom cutout of a RE engine. I hope this helps. I am not sure of what you really need.
My website is very poor and contains less than ten percent of what it should. There is no one here to keep up a website. I spend full time on new parts offerings.
 
Front View
a151785.jpg
 
You must log in or register to reply here.

Similar threads

T
MM Canadian UTS - Date of Mfg?
Replies
12
Views
508
tirediron
T
T
Oil preasure, or lack thereof
Replies
12
Views
1K
TCPDRETIRED218
T
O
New to me JD 620 PTO/3 pt issues
Replies
11
Views
1K
offroad23
O
G
MF35 Diesel Deluxe need help
Replies
6
Views
475
Greystone
G
H
IH574 Gas Tractor with a 3/8" Bolt in the Carburetor Outlet
Replies
9
Views
364
stevieb49829
stevieb49829
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top