This listing is for a very complete and restorable engine from a relatively early Holt 75 crawler tractor. The last photo of this listing shows a nicely restored Holt 75 crawler tractor. That photo is for reference only. That tractor is NOT part of this listing. The skid that this engine is setting on is actually the front 8 feet or so of the original Holt crawler tractor frame complete with the original tractor lifting eyes on both front corners. This engine has a 7-1/2″ bore and an 8″ stroke which produces a displacement of 1,321 cubic inches. I can find no freeze cracks anywhere on any of the 4 cylinders or the flat belt driven water pump located on the lower front left corner of this engine. Three of the eight valve rocker arms were broken and welded a long time ago. One of the bronze arms on one of the compression releases is broken but both parts of that broken are present. The lower half of the intake manifold has been replaced by welding a piece of steel tubing to each of the cast iron Y’s that attach to each pair of cylinders. That kit can be machined and used to build a running model of this engine in approximately 1/7 scale. That casting kit is included with this full size engine. I had thought that it would be great to have a running 1/7 scale model setting on top of this running full size engine. The bronze serial number tag on this engine is shown in a photo of this listing and lists the following data. HP 75 at 550 RPM. Several years ago, someone mentioned that the fact that this engine has no starting bar holes in the perimeter of the flywheel, means that it is a relatively early production Holt 75 engine. Please tell me more about the history or vintage of this engine if you possibly can. Please let me know of you happen to have or know of any of those parts for sale or trade. I have owned this engine for almost 30 years and have kept it inside all of that time. The previous owner had it stored outside in front of his construction company in Three Forks Montana for many years. Someone left the priming cups open for a while so now this engine is stuck. I have not tried to free it up at all and will leave that task to the new owner. Some piece of crap brass scrap collector managed to steal the brass water outlet pipe that was on the right side of this engine as well as the top of the brass bodied lubricator. Fortunately the brass thief did not make off with the serial number and data tag that is on the left rear part of this gem. I will be adding more information soon. The item “Holt 75 Crawler Tractor Engine Hit & Miss Steam 10 15 18 20 25 30 40 45 60 65″ is in sale since Sunday, November 30, 2014. This item is in the category “eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Engines & Components\Complete Engines”. The seller is “toysanyone” and is located in Bozeman, Montana. This item can be shipped to United States.
- Part Brand: Holt Best Caterpillar
- Manufacturer Part Number: 70 120 D6 D7 D8 D9 RD6 RD7 RD8
- Warranty: No
