Geoff Weeks Posted yesterday at 01:00 AM Share Posted yesterday at 01:00 AM 92-Series-Sheppard-Power-Steering-Service-Manual.pdf page 25 and 26 covers the methods. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574898 Share on other sites More sharing options...
mechohaulic Posted yesterday at 01:00 AM Share Posted yesterday at 01:00 AM 3 minutes ago, mechohaulic said: don't mess with me that way.; it's been a very long day of sanding/grinding .LMAO 1 minute ago, Joey Mack said: Bob.. take a close up picture of where the pitman arm is on the sector shaft, please... I am needing to learn what Mech is saying. Just because.. 🍻 also it depends on the box the DM has. a sheppard outside frame pitman had the two screws. inside frame ?? closing in on 74 I was still able to keep up with the youngsters loading hay and shaving on flatbed today after all day of sanding/grinding!! so maybe mind cells are off a little. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574899 Share on other sites More sharing options...
Joey Mack Posted yesterday at 01:01 AM Share Posted yesterday at 01:01 AM You know your sh!t.. so... No... not off.. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574900 Share on other sites More sharing options...
mechohaulic Posted yesterday at 01:09 AM Share Posted yesterday at 01:09 AM 6 minutes ago, Geoff Weeks said: 92-Series-Sheppard-Power-Steering-Service-Manual.pdf 10.92 MB · 0 downloads page 25 and 26 covers the methods. THANK YOU for the service manual. two set screws were more common(early) ; the large (5/8th ? allen ) did wake some brain cells, don't remember exact application. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574901 Share on other sites More sharing options...
Geoff Weeks Posted yesterday at 01:13 AM Share Posted yesterday at 01:13 AM twoset screws I think is the earlest design, I know it is on my two digit Sheppard box from the 60's. Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574902 Share on other sites More sharing options...
mechohaulic Posted yesterday at 01:14 AM Share Posted yesterday at 01:14 AM 14 minutes ago, Geoff Weeks said: Sheppard used three different pitman arm retaining methods, you have to know which of the three you are dealing with. Oldest had no nut and two set screws angled out from the box side of the arm. the next style has a hex nut (allen head) and a star washer/retaining tab behind the nut. The last style has a big hex nut that is split half way through and has a small bolt to "squeeze" the nut so it can't back off thought Bob's DM was a '66 which would make it the two set screw version. can't place the "last style" ;; but that's OK - don't expect to be involved with one. Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574903 Share on other sites More sharing options...
Geoff Weeks Posted yesterday at 01:16 AM Share Posted yesterday at 01:16 AM I think his box has been updated and is now a three digit box (392?) 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574904 Share on other sites More sharing options...
Popular Post mowerman Posted yesterday at 02:56 AM Author Popular Post Share Posted yesterday at 02:56 AM It’s around a 3/8 coarse bolt set screw towards the front of the truck as these guys mentioned earlier in the post thier not very difficult to remove… but I’ve had this bucket of bolts for 30 years and trust me fellas I swear this sucker is alive… it fights me every job I do but thus last go around I didn’t have any trouble at all this might sound weird but I’m thinking perhaps the bad karma on this old turkey finally left??????????who knows 3 Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574905 Share on other sites More sharing options...
Geoff Weeks Posted yesterday at 11:28 AM Share Posted yesterday at 11:28 AM Check, if it is held on with set screws there will be 2 about 180 deg apart. They can be hard to find after many years of rust and dirt. My "39" box truck has the two set screws (and still has the pitman arm on!) and the box will likely be scrapped with it on! No one wants a "39" box! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574916 Share on other sites More sharing options...
mowerman Posted 23 hours ago Author Share Posted 23 hours ago Hey geoph thanks so much for the download and all your input fellas just woke up breakfast and GYM soon didn’t have a clue what I was going to do with this box once I got it off lol but decided to deal with it next since sector seal is getting worse and dripping and running out pretty good where ever I have it parked .. might be a couple days before I get started on it but I’ll post photos of pitman arm a little later 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574924 Share on other sites More sharing options...
mowerman Posted 23 hours ago Author Share Posted 23 hours ago And yes it’s a 392 Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574926 Share on other sites More sharing options...
mrsmackpaul Posted 13 hours ago Share Posted 13 hours ago On 4/30/2025 at 9:15 PM, mowerman said: ok ,,,ran out of excuses and yesterday was gorgeous ,,,,got it all back together,,,nothing leaking,,white,smoke appears to have reduced conciderably,,,if not completely gone,,,,,maybe i might have to burn off the carbon,from that one tight exhaust valve,,,,kinda hard to tell...started it in the garage,,,with one door open,,took a while to clear the smoke,,,,,bob Well I'm a little late to the party here, well done on getting it all back together Good news about a improvement in the smoke situation as well Paul Quote Link to comment https://www.bigmacktrucks.com/topic/73081-finally-some-dm-progress/page/61/#findComment-574975 Share on other sites More sharing options...
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