As I started to clean up the Hydraulic lift manuals that were posted on the site it twigged my memory that I had purchased a new hydraulic cylinder on sale a couple of years ago with the intention of building another hydraulic lift for one of my tube frame tractors. I made one a few years ago using a GM power steering pump and a 1-1/2" bore cylinder for my one 1050 that I use for blowing snow. It works quite nicely but I had to mount the pump behind the engine so that the pump would rotate in the same direction as it would on the car engine and modified the reservoir on the pump so that it would hold more oil as I did not want to run the pump dry with the larger bore cylinder. Since I had a couple of gift cards for Princess Auto (a store in Canada that is similar to Harbour Freight) I had received this past Christmas and the one before that I had not used I decided to purchase a new pump and control valve on sale to use them up. I needed a break from cleaning up the manuals and had an itching to do something in the shop so I did some measurements and I think I have come up with a plan that will let me make a hydraulic lift using new "off the shelf" parts which should outlast me. The new cylinder has a 1" bore and a 6" stroke which is a little longer than the stroke of an original cylinder that Bolens used - I believe the original cylinder had a stroke of about 5-1/4". It also is a utility cylinder so it does not have the clevis at the front and the ports are 90 degrees to where the ports are on an original cylinder. Even with these differences I am hoping to come up with a lift that should mount similar to the way the original unit did and function very similar. I know these lifts come up for sale occasionally but they are usually in the U.S. and by the time I factor in the exchange rate and shipping the cost of making one starts to look attractive since I don't count my labour. I thought I would do a thread on it since it may help someone who has a bad pump or cylinder and give them ideas about replacing one or the other to keep their unit functioning - I hope you don't mind.
I am hoping to mount the cylinder, pump and tank in basically the same position as where they would have been originally and mount the control valve above and behind the pump area where the rod would normally go back to the operator area.. I have been doing some calculating, thinking and studying pictures of the original lift the last few days and think I have come up with a plan (may have to do a few changes as I go but that is part of the fun of building it. One of the things I had to factor in was clearance between the head of the carriage bolts that will mount the bracket to the rails that support the bracket and the pump and tank. Here are pictures of the cylinder and pump I am going to try and use - the pump is designed so it can be driven in either direction to pump hydraulic oil. I have ordered a 4-1/2" diameter pulley for the 1/2" pump shaft and I should be able to fabricate a tank to mount ahead of the pump.
Edited by 29 Chev, February 10, 2018 - 10:39 AM.