Author	[Modern View]
kylemorley 01-24-2013 08:40:49 69.130.59.206 Report to Moderator	Any thoughts on how much weight I can hang on a 4-bar bumper before it starts to bend or sag or otherwise misbehave? [Reply]   [No Email]
Bulldozer 01-26-2013 08:05:58 24.165.92.6 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to kylemorley, 01-24-2013 08:40:49   Would not be concerned so much about the bumper, but more on sand cast front axle, since the cantilever weight combines additional shear stress to the bending stress already developed from the basic tractor weight. However, addressing the bumper which is the current subject and not the axle,.. On dynamic loading, DOT uses a dynamic load factor = 3X for highway. For barn yard and dirt field work could reduce dynamic load factor to 2X. The static stress on the bumper bar at the bend where it bolts to the axle ~ 15 ksi compared to 36 ksi allowable for hot rolled steel, based on a 400# weight. Applying a 2X dynamic load factor places the stress = 30 ksi, and safety margin = 16% ,which is safe enough. The attachment bolts are loaded by a "heel-toe" arrangement. With a 400# cantilever weight, there is plenty of safety margin on the 5/8" bolts, even using grade 2. [Reply]  [No Email]
JMOR 01-25-2013 06:11:49 72.181.173.171 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to JMOR, 01-24-2013 08:40:49   Quoting Removed, click Modern View to seeGreg, hang that out thee a few more feet & you can either break the bumper or lift rear wheels off the ground! :lol: [Reply]  [No Email]
Greg 2N (TX) 01-25-2013 19:21:40 166.137.119.47 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to JMOR, 01-25-2013 06:11:49   Good thing I'm the only person using my tractor. It's good to hear from everyone about my make due with what I've got ideas. Sorry what works for me is like a horse-hair shirt to some. Thanks for the criticism, Regards, Greg [Reply]  [No Email]
JMOR 01-26-2013 08:23:03 72.181.173.171 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to Greg 2N (TX), 01-25-2013 19:21:40   Greg, I for one was not criticizing you set up, but rather pointing out, for all, that the further out/longer the lever, the greater the mount stress. No offense intended. Like, you, I do what works for me. [Reply]  [No Email]
Greg 2N (TX) 01-26-2013 09:12:08 166.137.119.43 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to JMOR, 01-26-2013 08:23:03   Yea, I need to be reminded of my fallen nature... ;) Greg [Reply]  [No Email]
JMOR 01-26-2013 09:41:10 72.181.173.171 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to Greg 2N (TX), 01-26-2013 09:12:08   I don't understand that, but don't guess I need to [Reply]  [No Email]
Greg 2N (TX) 01-26-2013 10:13:07 166.137.119.43 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to JMOR, 01-26-2013 09:41:10   Well I tend to go overboard when making stuff work. Thanks for the lever arm warning though. I'm trying to be easy and as careful as possible out here, especially when working alone with heavy and awkward loads. I really enjoy you guy's expertise and appreciate any comments, keeps me in check! Regards, Greg [Reply]  [No Email]
Ultradog MN 01-25-2013 02:39:34 184.100.109.75 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to kylemorley, 01-24-2013 08:40:49   This topic came up about a month ago and I posted these photos then. If you want to add more weight to your front bumper you could make up a set of braces that go from the top of the bumper to the axle. These would make the carrying capacity of your bumper much greater and would not be difficult to fabricate. Notice they install on the back side of the axle. Ford made front bumper weights for the later style bumpers and made the braces to help carry them. The weights were 100 lbs each and you could use up to 4 of them. Thanks to Jim UT for these photos. [Reply]  [No Email]
Kirk-NJ 01-25-2013 01:45:23 67.237.5.28 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to kylemorley, 01-24-2013 08:40:49   Excessive weight on the front can also damage your kingpin, axle and spindles. Kirk [Reply]  [No Email]
Greg 2N (TX) 01-24-2013 22:15:28 166.137.156.170 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to kylemorley, 01-24-2013 08:40:49   Quoting Removed, click Modern View to see I am pushing it with 180 lb (140 lb JD wheel wt + 40 lb mount plate). My property is soft sand so shock loads are small. Greg [Reply]  [No Email]
Dean 01-25-2013 07:49:45 67.172.15.77 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to Greg 2N (TX), 01-24-2013 22:15:28   Even with your reinforced, welded rather than riveted aftermarket bumper held to the axle by 4 bolts rather than two and wide automotive type front tires, you are indeed pushing things with the heavy cantilevered load. I solid shock would certainly deflect/fracture something. Dean [Reply]  [No Email]
Greg 2N (TX) 01-25-2013 17:42:15 166.137.119.31 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to Dean, 01-25-2013 07:49:45   Yep, I use it when post hole digging, lifting with the boom pole , or lifting with the hay bale fork, or the platform to move things slowly. Greg [Reply]  [No Email]
soundguy 01-24-2013 15:11:16 173.107.102.211 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to kylemorley, 01-24-2013 08:40:49   if it was a HD bumper you might get a few hundrd pounds. a nice oe rivited bumper.. i think I'd stop at 150 or so.. just so I didn't kill it. static load it would LIKLEY take the 4-5 00 jmor said. a good pothole might deflect it though. [Reply]  [No Email]
JMOR 01-24-2013 18:01:34 72.181.173.171 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to soundguy, 01-24-2013 15:11:16   Quoting Removed, click Modern View to seeFront tires support the 800# front weight of the 8N tractor & my other tractor's FEL will lift my 8N by that OEM bumper. ....and I do not wish to argue up vs down. [Reply]  [No Email]
Dean 01-24-2013 19:49:15 67.172.15.77 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to JMOR, 01-24-2013 18:01:34   It's not the static load but rather the dynamic load that will damage the bumper if the tractor is actually used. I expect an OEM bumper can be severly damaged by bouncing through a furrow with 100 lbs. attached. Dean [Reply]  [No Email]
soundguy 01-24-2013 18:20:49 107.41.7.63 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to JMOR, 01-24-2013 18:01:34   i'd call that a static load though. and a low duty cycle load at that. Ie.. temp lifting or dragging by the bumper, vs a 'forever' weight hanging on it. i know when i strap tie my 850 to my trailer I can actually make the bumper deflect downwards due to lever action on the front tounge. again.. I have loaders on most of mine.. so have no shortage of front weight. my non loader units have chains usually wrapped around the bumper.. probably in the 100# range. i do know I have stood many times on my bumpers to reach things. may be a good subject f a stress test for someone with a damaged oe bumper.. one that has no collector value. laod it statically and then make that a dynamic load and drop the frotn tire into a bunch of gopher holes :) I bet the spindles sure wouldn't like it though.. ;) i'm not arguing with ya either way.. just guestimating.. I've never put it to a test. [Reply]  [No Email]
JMOR 01-24-2013 18:50:11 72.181.173.171 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to soundguy, 01-24-2013 18:20:49   Quoting Removed, click Modern View to seeWell, there is certainly no question as to whether static or shock load will do the most harm. Loosely chain 500 # on it and hop a few ditches/furrows/etc. and analysis would show many times the actual 500# weight. Probably the case with the fellow and big flywheel tied on it. [Reply]  [No Email]
soundguy 01-24-2013 20:09:10 184.4.146.28 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to JMOR, 01-24-2013 18:50:11   that was exactly my thinking as well on the flywheel. [Reply]  [No Email]
Ken (MO) 01-24-2013 09:49:43 144.73.128.185 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to kylemorley, 01-24-2013 08:40:49   I would not put more than a 100lbs on. My horror story is I had hung a large flywheel from something the PO of the farm had left behind. While brush hogging, the bouncing caused one of the mounting bolts of the bumper to break off, then the other one. Before I knew it I was driving over the bumper/flywheel. Got stopped before it went into the hog, but managed to crack the hydraulic pump casing (the bumper had snagged a bolt a PO had run into the test port rather than the alan head screw that should have been there). [Reply]  [No Email]
JMOR 01-24-2013 08:53:09 72.181.173.171 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to kylemorley, 01-24-2013 08:40:49   400-500# ok, don't know upper limit? This post was edited by JMOR at 08:53:32 01/24/13. [Reply]  [No Email]
TheOldHokie 01-24-2013 09:16:02 108.22.203.170 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to JMOR, 01-24-2013 08:53:09   [quote:3a9ca740e0]400-500# ok, don't know upper limit?[/quote:3a9ca740e0] I'd say that is optimistic JMOR. These weights are less than 100# each and three of them took the bumper out. Notice the broken weld on the tab in the bottom right that bolts the bumper to the axle. For heavier overhung loads on teh bumper you really need some sort of stiffener. TOH This post was edited by TheOldHokie at 10:35:02 01/24/13. [Reply]  [No Email]
Robert J Kountz 01-24-2013 09:49:54 70.60.108.106 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to TheOldHokie, 01-24-2013 09:16:02   I think there is more metal in that bumper than in my car...lol [Reply]  [No Email]
JMOR 01-24-2013 09:26:13 72.181.173.171 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to TheOldHokie, 01-24-2013 09:16:02   I expect it to be more....I used 400-500 because I have many times pulled loaded trailers around with mine & probably have almost that much tongue weight empty. If a fellow really wants to know, just load it until it breaks! :lol: [Reply]  [No Email]
JMOR 01-24-2013 09:25:58 72.181.173.171 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to TheOldHokie, 01-24-2013 09:16:02   I expect it to be more....I used 400-500 because I have many times pulled loaded trailers around with mine & probably have almost that much tongue weight empty. If a fellow really wants to know, just load it until it breaks! :lol: [Reply]  [No Email]
TheOldHokie 01-24-2013 10:40:03 108.22.203.170 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to JMOR, 01-24-2013 09:25:58   Quoting Removed, click Modern View to see As Dean said I suspect shock loads are the biggest concern. BTW - did you notice how your response and the following ones were all screwed up? A misplaced bbcode quote tag in my message hosed the server formating of the following responses. Really - that is not nice behavior - I hate bbcode..... TOH [Reply]  [No Email]
Dean 01-24-2013 08:43:39 152.216.3.5 Report to Moderator	Re: How much weight do I dare put on my bumper? in reply to kylemorley, 01-24-2013 08:40:49   It will depend upon what you plan to do with the tractor but, in any event, not much. Shock loading (bumps) will damage the OEM bumper with limited additional load. Dean [Reply]  [No Email]