Alemite grease fittingskf

The Beech parts manual lists a grease fitting part #1645. This fitting was produced by Alemite Corp. This fitting manufactured in the 1940's and 1950's is no longer produced by Alemite Corp. However, They do have a replacement grease fitting part # 1728-B.

If you are working on one of the more common press-in Beech grease fittings it's probable the #1645 (Alemite, new part #1728-B). Alemite does offer a insertion extraction tool specifically for that fitting (listed below). If using a drill bit, work your way up from a small bit and try not to go larger than a 3/16",(4.7625mm or .1875") size bit. Otherwise you will have to use the next larger size grease fitting. The next size up is the Alemite #1743-B for this you'd use a 1/4" drill bit size. If you have any of the old 1645 fittings that no longer will stay pressed in , then you most likely will have to use the larger fitting anyway. Prepare the hole with a 1/4" bit first when using the next larger size fitting. As we already know, the press-in fittings are really a nuisance due to the limited pressure and abuse the will hold up to and still remain installed. Not always practical but I like to remove any tension behind the fitting. For the landing gear, I like to have the plane on jacks and do a partial retraction to loosen tension of the assembly that I am trying to grease. The assembly will more easily take the grease and not pressure up the grease gun hose. Although the grease fittings are getting old and sometimes may contain blockage, it is often the case of the airplane part assembly having to much pressure behind the fitting to receive the necessary grease. The press-in grease fittings are not designed to hold up under a high pressure environment and can eventually be forced out of their socket by a mechanic that really puts muscle to the handle of a grease gun. When greasing a zerk fitting, sometimes you can't get the grease gun hose off the zerk. This is due to a fitting or assembly that is not taking the grease and pressures up the grease gun hose. This causes the mechanic to use force to pull the hose off. Sometimes the grease zerk/fitting will come out of its socket and remain in the tip of the grease gun hose. Or, sometimes a quick jerk and the grease zerk/fitting will break-off. The grease gun hose is just doing its job, it's suppose to grip under pressure, if you find yourself in this situation, relieve the pressure from the grease gun before removing from zerk Alternative ? Yes, Alemite has "Thread forming fittings" like the #3038-B available that will take more pressure before they work their way out of the socket. So, converting to a treaded type fitting will allow more pressure from a grease gun and you may be able to force the grease into the assembly without removing tension off of the assembly that is receiving the grease. Try A&J Fittings www.ajfittings.com/Fittings.htm A&J Fittings 2414 Ella Blvd Houston TX. 77008 Toll Free 877-453-4333 Local 713-869-9177 The old part #1645 that's in the Beech parts book is no longer produced by Alemite Corp. Instead they have replaced it with the part #1728-B. Their is also a insertion and extraction tool available part #5253-3. Available at A&J fittings. Their is a slight difference between the #1645 and the 1728-B What's the difference ? Alemite #1645 (original Beech grease fitting by Alemite) (Overall length=30/64"), (Shank length 1/4"), (Drill dia. 3/16") The #1728-B is 3/64" longer or .046875" longer than the #1645 Alemite #1728-B grease fitting (Overall length=33/64"), (Shank length 1/4"), (Drill dia. 3/16") Next oversize grease fitting Alemite #1743-B grease fitting (Overall length=35/64"), (Shank length 1/4"), (Drill dia. 1/4")