William Allen Posted September 26, 2019 Share Posted September 26, 2019 I have a ‘76 R600 the trailer has been hooked up for a couple of years just because we never used the truck. I’ve been getting it back running to haul a dozer. when i went to unlock the fifth wheel it seemed to be locked up. Im guessed do to the old grease that is packed in there. I need to know ways to clean the old grease out to get the fifth wheel freed up. Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/ Share on other sites More sharing options...
alex g Posted September 26, 2019 Share Posted September 26, 2019 I would remove fifth wheel and clean and inspect it before I chanced using it. Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-432851 Share on other sites More sharing options...
Prowrench Posted September 26, 2019 Share Posted September 26, 2019 3 hours ago, William Allen said: I have a ‘76 R600 the trailer has been hooked up for a couple of years just because we never used the truck. I’ve been getting it back running to haul a dozer. when i went to unlock the fifth wheel it seemed to be locked up. Im guessed do to the old grease that is packed in there. I need to know ways to clean the old grease out to get the fifth wheel freed up. are you parked on flat level ground? is the tractor backed up against the king pin? what make fifth wheel is it? Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-432860 Share on other sites More sharing options...
William Allen Posted September 26, 2019 Author Share Posted September 26, 2019 1 hour ago, Prowrench said: are you parked on flat level ground? is the tractor backed up against the king pin? what make fifth wheel is it? It is on level ground. The king pin is against the fifth wheel plate. And it is what ever fifth wheel that was put on from factory in 76. Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-432862 Share on other sites More sharing options...
tjc transport Posted September 26, 2019 Share Posted September 26, 2019 i would pull the lock, set the trailer brakes and try pulling away easily. it may pop loose. 1 Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-432864 Share on other sites More sharing options...
mrsmackpaul Posted September 26, 2019 Share Posted September 26, 2019 1 hour ago, tjc transport said: i would pull the lock, set the trailer brakes and try pulling away easily. it may pop loose. I have used a crow bar on jaws to pop them open on grease plates (fifth wheels) that have been a trailer sitting for decades If you hold the handle out with a chain block or come along, so the fifth wheel cant relock and then as said, apply the trailer brakes and work it back woulds and forwards it will no doubt release pretty easily Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-432865 Share on other sites More sharing options...
h67st Posted September 26, 2019 Share Posted September 26, 2019 Also spray some WD40 or better lube on the jaws before trying the above methods. Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-432868 Share on other sites More sharing options...
Prowrench Posted September 26, 2019 Share Posted September 26, 2019 8 hours ago, William Allen said: It is on level ground. The king pin is against the fifth wheel plate. And it is what ever fifth wheel that was put on from factory in 76. if there is a bolt sticking out the side it is a release bolt if it isn't folded over hit it with a sledge hammer that will release the lock bar Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-432875 Share on other sites More sharing options...
Prowrench Posted September 26, 2019 Share Posted September 26, 2019 Just now, Prowrench said: if there is a bolt sticking out the side it is a release bolt if it isn't folded over hit it with a sledge hammer that will release the lock bar back in '76 it's unlikely the factory installed the fifth whee,l more than likely it was installed by a body builder , it could be a fontaine, holland, asf, or a simplex Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-432876 Share on other sites More sharing options...
William Allen Posted September 26, 2019 Author Share Posted September 26, 2019 11 hours ago, mrsmackpaul said: I have used a crow bar on jaws to pop them open on grease plates (fifth wheels) that have been a trailer sitting for decades If you hold the handle out with a chain block or come along, so the fifth wheel cant relock and then as said, apply the trailer brakes and work it back woulds and forwards it will no doubt release pretty easily Paul It has a handle that you slide. Not a pull out one Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-432900 Share on other sites More sharing options...
William Allen Posted September 26, 2019 Author Share Posted September 26, 2019 It has a a handle that slides not one that pulls out. Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-432901 Share on other sites More sharing options...
Prowrench Posted September 27, 2019 Share Posted September 27, 2019 7 hours ago, William Allen said: It has a a handle that slides not one that pulls out. do you have any pictures you can post ? You might try having someone pull on the handle with a hook while you rock back and forth a little. dried up grease won't be a problem until the temps are in the teens. you've got a lot of rust along with worn parts try spraying everything on the underside with a good penetrating oil like thrust, kroil or last resort pb blaster 1 Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-432914 Share on other sites More sharing options...
William Allen Posted September 30, 2019 Author Share Posted September 30, 2019 Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-433072 Share on other sites More sharing options...
Prowrench Posted October 1, 2019 Share Posted October 1, 2019 14 hours ago, William Allen said: Unfortunately your pictures did not load Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-433138 Share on other sites More sharing options...
mowerman Posted November 4, 2019 Share Posted November 4, 2019 im sure the adjuster pins are just rusted to the side rails as someone metioned spray the shit out of them then tap on the release mechanism good luck...welcome aboard....alotta times they are real hard to move,even if you use them all the time make sure you wind down the legs on your trailer,and take off the pressure before you start moving it back in forth...good luck...bob Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-435210 Share on other sites More sharing options...
Freightrain Posted November 15, 2019 Share Posted November 15, 2019 On 9/26/2019 at 5:08 PM, William Allen said: It has a handle that you slide. Not a pull out one Sounds like an old Fontaine "No slack"? Likely just corroded. Pull the lever and try to strap it to stay in the unlocked position and then try moving the truck back and forth to hopefully knock it loose. Remember to lower the trailer legs!!! Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-435919 Share on other sites More sharing options...
Maddog13407 Posted November 17, 2019 Share Posted November 17, 2019 agree with Larry, Fontaine aka (the rebel wheel) cause they were made Birmingham Alabama not in China like they are now a days are the only ones I ever seen with a handle. they were about the most secure wheel ever made. lube it up Quote Link to comment https://www.bigmacktrucks.com/topic/59171-1976-r600/#findComment-436055 Share on other sites More sharing options...
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