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Author Topic: Soundhead Oil Question Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 07-16-2006 07:34 AM                     I believe we have a couple of 1040's running Mobil-1 gear oil over in Colorado, these have no flywheels in the motors (perhaps PS-24's?). The nice thing about the Mobil-1 is that its not a very heavy lubricant like actual 90 wenght gear grease is.... I would peg its actual consistancy(pourability) somewhere about the same as SAE 30 to 40 weight oil. It has a slightly similar smell as actual 90 weight gear lube does but nowhere near as smelly. Mark  |  IP: Logged Robert Minichino Master Film Handler Posts: 350 From: Haskell, NJ, USA Registered: Dec 2005 posted 07-16-2006 08:40 AM                        An SAE 85W gear oil is about the same viscosity as an SAE 30 motor oil; they're on a different scale. Here's a cool chart: http://www.experimentalhelo.com/eh_oilVisChart_fullT.htm  |  IP: Logged Pete Lawrence Expert Film Handler Posts: 192 From: Middleburg, PA Registered: Aug 1999 posted 07-16-2006 09:33 AM                     quote: In the 1040, there is, in addition to the gear meshes, a series of bronze bearings that are lubricated by having one end exposed to oil wetness, ... Are we talking about the same 1040 (RCA MI-1040)? Mine are 100% ball bearing. Not a bronze bearing anywhere, just the two bronze gears.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 07-16-2006 10:27 AM                     Yes, I have seen some of the very old gear boxes that have bronze bushings in them. Its extremely rare to find any of them still operating today. I can't say for sure if the sound heads in Colorado are bushing or not since I've never had them apart. We also have a 1040 in Jackson, WY at the Teton Theater that is ball bearing... rebuilt that gar box about a year ago but only because of excessive leaks... the gearing was fine. The one thing that the Synthetic GEar Lube has over regular 90 weight gear lube is that it just doesn't change viscosity at temperature extremes. Take 90 weight gear lube down to about 40 degrees as might be expereinced in a drive-in sometime and it almost gets like mud. Synthetic stays the same viscosity and flows freely. Mark  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 07-16-2006 11:32 AM                        I think we are confusing MI-1040 soundheads and 1040 XL heads. Louis  |  IP: Logged Chris Unwin Film Handler Posts: 20 From: Langley B.C. Canada (Vancouver) Registered: May 2006 posted 07-17-2006 04:48 AM                     Hey Gary. Out of curiosity, I saw you mentioned carbon arc lamphouses. Are you going to keep the carbons!?  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 07-17-2006 07:37 AM                     quote: Louis Bornwasser In the 1040, there is, in addition to the gear meshes, a series of bronze bearings that are lubricated by having one end exposed to oil wetness, which then wicks onward to the place where oil is required. The heavier the oil, the less the oil will flow into all places where it is needed. Thats the place in the all pot metal X-L that is still in the dark ages. I've replaced more bronze bushings in X-L sprocket assemblies than any other bushings I can think of. They never get quite enough oil but if they get too much then they drip.... and on older machines the spirals are almost always found plugged up with the bronze material from the bushings. Steel shafts in Cast Iron bushings are the best way to go if one has to have bushings. Simplex never did do this the right way in the X-L, Both Brenkert and Phillips did it correctly.  |  IP: Logged System Notices Forum Watchdog / Soup Nazi Posts: 215 Registered: Apr 2004 posted 10-16-2013 08:32 AM                 It has been 2648 days since the last post.  |  IP: Logged Richard May Phenomenal Film Handler Posts: 1057 From: Floral Park, NY USA Registered: Aug 2004 posted 10-16-2013 08:32 AM                     This Mobil one product is the closest I could find here. It seems like the same one that was talked about. Is it? Mobil One Synthetic Gear Oil, SAE Grade 90, ISO Viscosity Grade 220, Viscosity Index 152  |  IP: Logged

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