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News: 10/5/12 - All new members are REQUIRED to fill out the signature section of your profile. Otherwise, you may be deleted from the forum. This is to help me determine if you are a member or if you are a spammer. Thank you.

9/22/12 - I ask that you please add a signature line to your profiles on the Cletrac Forum to help me to determine who is spam and who is not. You don't need to drop everything and do this immediately, but please do it when you get a minute and you are visiting the forum. Just go to and put something in the signature area. If you no longer want to be a member on the Cletrac Forum, please remove your membership.

8/10/11 - Added a new board: Trucking and Hauling

5/30/11 - Just added several new pictures to the Photo Gallery, including several Alfta Track OC-4 working in snow logging, several from the Chicago Road Show, and some from a logging show (not all Oliver/Cletrac). All these pictures are from around 1963 and were scanned from old slides given to me by my late friend John W. Davis. Go to the Photo Gallery and click on "NEW" to see these pictures. Quality is marginal, but I think you will enjoy them.

2/13/11 - Just added a new board "New members introduce yourselves here".

Folks, I just added a new photo gallery where you can upload your own pictures with descriptions, etc. Right now this is in the beta testing stage to see how it works out. Give it a try, but please keep a backup copy of your pictures just in case we decide to use something else. I would prefer you use your real name on the photo gallery, but if you really don't want to, please use the same username as on the forum. Please put your images into the proper categories and take care when your write out your descriptions and image names so people can search for them. I am learning this as we go. At least at the beginning, I have it set up where the administrator has to approve members. I am afraid we may get porn spam in here if we leave it open. To get to the photo gallery, use this link:

Folks, when you join the forum, or when you get the chance to update your Profile, please be sure to put your location and interests. Filling out your signature would help as well. I've been getting some spammers joining and posting links to sites that are completely unrelated to Cletrac or Oliver, or anything to do with tractors. It would make it easier for me, as well as all the other members, if you guys would put your location and interest in your profile. See

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1  Cletrac Tractor Discussion / Subjects Related To All Models / Re: injectors for a hercules in a BD cletrac. on: June 13, 2016, 12:21:23 PM
Get the numbers off of the injectors. I doubt if the Mazda ones will work as an assembles as the Hercules are a pintle type.
2  Cletrac Tractor Discussion / HG, OC-3, OC-4 & General / Re: Looking for information on serial numbers on engine on: March 27, 2016, 11:49:36 AM
Well you said any information" IXB3 is the model of the engine. IX is the basic engine model B designates the bore size. Those engines were made in  at least 4 different basic bore sizes from 2-1/2 inch up to 3-1/4 inch for the IXB. The number 3 designates it as engine with 3 diming gears, there are also IX*5 engines means those engines have 5 timing gears. They have the mag on the other side of the block + they have a gear drive water pump. The other number is the serial number Hercules assigned to that engine. They assigned different series of numbers at different time for those engines. At one time I had a list of what groups were built in what years but not any more. does that help?
3  Cletrac Tractor Discussion / All Models Except HG, OC-3, OC-4 & General / Re: 1949 BGSH crawler on: February 22, 2016, 09:08:13 PM
In case anybody else reads this all Oliver 6 cylinder diesels use the same basic PSB pump no matter if is for a little 77 or the 302 cubic inch 950. Most likely the plunger was stuck and has twisted off and no you don't need a test stand to check one. We serviced probably 150-200 Oliver diesels with PSB pumps and never had one to a pump shop.
4  Cletrac Tractor Discussion / HG, OC-3, OC-4 & General / Re: Track Roller Rebuild on: August 01, 2015, 09:29:17 PM
If you are in "farm country"  get yourself some "corn head grease". It is better than oil or grease.
5  Cletrac Tractor Discussion / HG, OC-3, OC-4 & General / Re: Vacuum Gauge on an IXB-3 on: March 20, 2015, 05:13:19 PM
I would drill and tap it for 1/8 inch pipe about  1/2 inch above the upper part of the mounting flange. I would also do a cylinder balance test. If you don't have one send me an e-mail address and I will send you a chart on reading a vacuum gauge. John
6  Welcome & Rules - Please read before posting / New members introduce yourselves here / Looking for Cletraker over in Sweden on: January 25, 2015, 09:34:16 AM
If you see this I have some questions for you. Thanks John
7  Cletrac Tractor Discussion / HG, OC-3, OC-4 & General / Re: Unusual Oliver ID, OC46 or Johnny Cash model? on: January 15, 2015, 08:07:46 PM
The bell housing you have was only used on early tractors. OC-4 and 46 tractors have a bell housing where an auxiliary transmission can be bolted too as well. The IXA was only used about 1 year (39 as was mentioned) Then the IXK which was a 3.125 bore engine and was used till after the war. I agree the loader is not a loader for an OC-46. If you are going to use this a lot you will find you will  also want the auxillary  transmission as the 3 speed you have was designed for  farming when your tractor was built.
8  Cletrac Tractor Discussion / All Models Except HG, OC-3, OC-4 & General / Re: Found a Model F on: January 13, 2015, 08:56:04 PM
Where is the crack in the block? Is it so it can be sleeved or repaired?
9  Cletrac Tractor Discussion / HG, OC-3, OC-4 & General / Re: 1957 OC-4 Ammeter issue. on: November 01, 2014, 07:09:44 PM
All you need to do is touch the wire to the terminals. YOU do NOT leave the wire hooked up. It is a momentary flash of a blue spark.  Some regulators have 3 terminals some have four with one being underneath the regulator The 2 on the generator will be A & F or FLD and GEN. Check which set of terminals you have on the regulator and also the number of the regulator and get back with us.
10  Cletrac Tractor Discussion / HG, OC-3, OC-4 & General / Re: Hydraulic fluid filling procedure on: August 30, 2013, 06:11:33 AM
O. K. what is the large hex plug on the valve body? Your relief valve needs to be in the circuit before it reaches the valve spools otherwise it does not protect the circuit All the valves I ever worked with had the relief valve built into the inlet side of the valve. Do you use a filter?
11  Cletrac Tractor Discussion / HG, OC-3, OC-4 & General / Re: Hydraulic fluid filling procedure on: August 27, 2013, 08:25:06 PM
Please explain a little more. Are you talking a relief valve to protect the system or a set of break-a-way couplers. Also make sure you have a filter on the return line to the tank.
12  Cletrac Tractor Discussion / All Models Except HG, OC-3, OC-4 & General / Re: Need help with starting AD on: August 10, 2013, 08:40:18 PM
First of all get a voltmeter and see what the voltage is at the starter while the engine is cranking. You need to remember you are dealing with a diesel and you want it to crank over fast! You want 10.5 volts minimum while the engine is cranking measured at the starter.
13  Cletrac Tractor Discussion / All Models Except HG, OC-3, OC-4 & General / Re: 6354 Perkins into a BDH on: August 05, 2013, 07:32:44 PM
When I went to the UK either 7 or 9 years (I went twice) ago I stopped at a collector that had done this. It looked real good.
14  Cletrac Tractor Discussion / Subjects Related To All Models / Tractor show around Meadville PA next week. on: July 09, 2013, 04:30:22 PM
My boy send me an e-mail with a photo showing Bob on one of his Cletrac's. How big is this show It said they are featuring tractor built in Ohio. How many tractor would you think would be at the show how about directions?
15  Cletrac Tractor Discussion / HG, OC-3, OC-4 & General / Re: Low Oil Pressure on: July 09, 2013, 04:26:55 PM
Do you know what a bearing leak detector is? Most likely that engine has poured bearing shells. You could tighten up the clearance by removing shims. Also there is an external adjustment for oil pressure.
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