timaz996 Posted May 3, 2023 Share Posted May 3, 2023 My Shepard steering bock leak has a leak at the vent hole. They don't sell a replacement plug and say to silicone the hole closed. It is still leaking. I cleaned it with acetone first but is still leaking. Her is a couple pictures and one picture you can see Hydraulic fluid on my generator exhaust from driving about 300 miles. Any suggestions??? Link to comment Share on other sites More sharing options...
streetrodder Posted May 4, 2023 Share Posted May 4, 2023 JB weld Link to comment Share on other sites More sharing options...
Gary 05 AMB DST Posted May 4, 2023 Share Posted May 4, 2023 Do you think that vent was there for a reason? Why block it? Gary 05 AMB DST Link to comment Share on other sites More sharing options...
Robert U Posted May 4, 2023 Share Posted May 4, 2023 It sounds like it is time to do a TRW steering box replacement. The leak is probably due to a failed seal which will only get worse. Plugging vent is a just a patch and will come back to haunt you. Lost steering due to a cracked seal on I 85 in South Carolina. Not fun Bob U 2000 Dip 1 Link to comment Share on other sites More sharing options...
Frank McElroy Posted May 4, 2023 Share Posted May 4, 2023 You have a leaking sector shaft seal and to fix it will require a rebuild kit and likely you have worn internal parts. Time to look at a TRW swap. 2 Link to comment Share on other sites More sharing options...
jacwjames Posted May 4, 2023 Share Posted May 4, 2023 (edited) Tim I responded on IRV2 but thought it might be beneficial if I post here also Tim, Not 100% sure but I think the leak is from the dust cap on the sector shaft. I have a M100 Sheppard manual, here's a link https://www.rhsheppard.com/wp-conten...v-B_8-2014.pdf , and it does say that after assembly you are suppose to cover the hole with RTV type sealant. But at the end of the sector shaft there is an O-ring and my guess it's leaking there and since the dust cover isn't suppose to contain pressure it just leaks. There is a Sector Shaft seal kithttps://www.amazon.com/M100-Power-Steering-Sector-Shaft/dp/B09RZJY9R2?th=1 that you can buy and the job can be done without removing the steering box. I found this video and it looks like the rig had the same type of leak. https://www.youtube.com/watch?v=g7MEnfl_gEc Edited May 4, 2023 by jacwjames 1 Link to comment Share on other sites More sharing options...
timaz996 Posted May 4, 2023 Author Share Posted May 4, 2023 If this is the case I'm stuck because I don't have the tools to do this job. I'm full time and now in Pahrump, NV. Link to comment Share on other sites More sharing options...
jacwjames Posted May 4, 2023 Share Posted May 4, 2023 (edited) I posted these on IRV2 but figured it wouldn't hurt to post here also. I crawled under my rig and took pictures of the Sheppard steering box to help Tim identify his. Mine has the name and model number cast into the the drivers side of the box. It is pretty visible once you get light on it. Unfortunately the way it is mounted I don't think the seal kit could be installed without dropping the box. Edited May 4, 2023 by jacwjames Link to comment Share on other sites More sharing options...
jillandjackie Posted June 24 Share Posted June 24 where did you all find the seal rebuild kits for these? Link to comment Share on other sites More sharing options...
jacwjames Posted June 24 Share Posted June 24 (edited) https://www.amazon.com/M100-Power-Steering-Sector-Shaft/dp/B09RZJY9R2?th=1 If your steering box is tight it might be worth trying to fix, there are videos on how to rebuild but it's hit or miss. I believe Tim had a shop try to fix his and ended up with problems and ultimately changed to a TRW box. If you rig wanders it might be better to so the TRW swap. Edited June 24 by jacwjames 1 Link to comment Share on other sites More sharing options...
tomevansfl Posted June 25 Share Posted June 25 On 5/3/2023 at 9:25 PM, Frank McElroy said: You have a leaking sector shaft seal and to fix it will require a rebuild kit and likely you have worn internal parts. Time to look at a TRW swap. What price range would there be top replace with a rebuilt TRW box? Im looking at maybe having to replace my Sheppard box due to a leak. Link to comment Share on other sites More sharing options...
Solution cbr046 Posted June 26 Solution Share Posted June 26 I got mine through Weller Truck Parts. Total was $1700 with the pittman arm less $500 for the core exchange. You'll also need (3) 7/8 x 4" Grade 8 bolts as the Sheppard bolts are too short. https://wellertruck.com/inventory/steering-gear?UNIT-MODEL=TAS65 There's multiple versions of the TAS65. Mine was TAS65-126 + pittman arm TRW 84263202 There's a lonnnnnng discussion on iRV2 discussing the swap - 103 pages! Finally at the bottom of page 15 is the write up I used for my swap (and attached). https://www.irv2.com/forums/f115/steering-box-play-sheppard-m100-shim-or-swap-for-a-trw-210152-15.html The hardest part was getting the Sheppard mounting bolts off and drilling a 1 1/4" hole in the steering plate. Even with a torque multiplier I never could get the bolts loose and ended up having a shop do the entire swap. They must have used red loctite and I didn't have enough heat. Good luck. - bob Steering Box Swap.pdf 1 Link to comment Share on other sites More sharing options...
tomevansfl Posted June 26 Share Posted June 26 Thanks Bob, Josams just called and said the steering box is bad and has to be replaced. They will replace it with a TRW for $2,000 total out the door. Not what I was hoping but what can I do. I am physically unable to get underneath and attempt the repair myself…not to mention I’m not mechanically inclined enough to attempt that major of a repair. The price you quoted for parts makes this cost seem very reasonable. Link to comment Share on other sites More sharing options...
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