Coulton Posted June 4 Share Posted June 4 (edited) Anyone know parts # for pinion seal. Single axle. 1955 B-61. What’s involved replacing the seal? Edited June 4 by Coulton Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/ Share on other sites More sharing options...
Coulton Posted June 4 Author Share Posted June 4 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553096 Share on other sites More sharing options...
Coulton Posted June 4 Author Share Posted June 4 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553097 Share on other sites More sharing options...
Coulton Posted June 4 Author Share Posted June 4 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553098 Share on other sites More sharing options...
Joey Mack Posted June 4 Share Posted June 4 I bet,, Mechohaulic will know !! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553099 Share on other sites More sharing options...
Geoff Weeks Posted June 4 Share Posted June 4 Wow, old Timken axle. You might find a rope seal sandwiched in the front bolt on plate. I haven't pulled one apart, I'd have to look if I have any parts or service that cover that old "U" axle. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553100 Share on other sites More sharing options...
Geoff Weeks Posted June 4 Share Posted June 4 (edited) Correction, I am wrong, it is not a U200 Timken, although it looks a lot like it. It is CRD117 Mack. I didn't know Mack made frontloading double reduction, all I know are the top loading. Bearing and seal kit: 205SP70 According to Weller for what that is worth. Quick search comes up with: PAI Online (paiindustries.com) Edited June 4 by Geoff Weeks 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553103 Share on other sites More sharing options...
Popular Post mechohaulic Posted June 5 Popular Post Share Posted June 5 actually quite easy. might be off on some numbers ; it's been a while. remove 8 flange bolts holding u-joint /driveshaft. no need to separate u-joint .enough room in slip yoke to slide driveshaft out of way. plastic pail to set driveshaft on works, under flange is a 2 1/4 ? castle nut . remove cotter pin and nut. then remove 5 mounting bolts holding cover. seal should be a remove/ install from the inside. new seal/ gasket ;; be sure to mount cover properly having return drain on bottom as pictured. pay attention to front/back of seal when installing in cover. 3 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553104 Share on other sites More sharing options...
Joey Mack Posted June 5 Share Posted June 5 See?? I told you.... 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553105 Share on other sites More sharing options...
mechohaulic Posted June 5 Share Posted June 5 Just now, Joey Mack said: See?? I told you.... it shows how you are one hell of an excellent teacher and I remember some of what YOU taught. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553106 Share on other sites More sharing options...
Joey Mack Posted June 5 Share Posted June 5 Both of you guys,,, Mech, and GW are full of knowledge.. Listen to them Coulton.... Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553107 Share on other sites More sharing options...
mechohaulic Posted June 5 Share Posted June 5 3 points off on instructions:: after removing the castle nut , you have to remove flange on rear splines !! THEB remove 5 mounting bolts . I wrote that way to see if my teacher was going to correct me. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553108 Share on other sites More sharing options...
Joey Mack Posted June 5 Share Posted June 5 Nope... I'm out... this is all you Sir... Luv U Mech.. Jojo Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553109 Share on other sites More sharing options...
mechohaulic Posted June 5 Share Posted June 5 looking at pics 3 & 4 showing bottom view of seal cover ; notice the pultruded section on seal cover between bottom bolts. that must line up on the rear housing allowing oil to return back to rear. chances are change over on seal number /style . might be a match it up , silicone may replace the gasket. mine it would be sheet of gasket material and small ball pien hammer to make a new one, then LIGHT film of silicone. don't remember torque on castle nut. reuse the nut = tight as can be then line up holes for large cotter pin. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553110 Share on other sites More sharing options...
Coulton Posted June 5 Author Share Posted June 5 3 hours ago, Geoff Weeks said: Correction, I am wrong, it is not a U200 Timken, although it looks a lot like it. It is CRD117 Mack. I didn't know Mack made frontloading double reduction, all I know are the top loading. Bearing and seal kit: 205SP70 According to Weller for what that is worth. Quick search comes up with: PAI Online (paiindustries.com) Thank you Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553113 Share on other sites More sharing options...
Coulton Posted June 5 Author Share Posted June 5 2 hours ago, mechohaulic said: actually quite easy. might be off on some numbers ; it's been a while. remove 8 flange bolts holding u-joint /driveshaft. no need to separate u-joint .enough room in slip yoke to slide driveshaft out of way. plastic pail to set driveshaft on works, under flange is a 2 1/4 ? castle nut . remove cotter pin and nut. then remove 5 mounting bolts holding cover. seal should be a remove/ install from the inside. new seal/ gasket ;; be sure to mount cover properly having return drain on bottom as pictured. pay attention to front/back of seal when installing in cover. Thank you appreciate the info Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-553114 Share on other sites More sharing options...
Coulton Posted July 31 Author Share Posted July 31 On 6/4/2024 at 8:55 PM, mechohaulic said: looking at pics 3 & 4 showing bottom view of seal cover ; notice the pultruded section on seal cover between bottom bolts. that must line up on the rear housing allowing oil to return back to rear. chances are change over on seal number /style . might be a match it up , silicone may replace the gasket. mine it would be sheet of gasket material and small ball pien hammer to make a new one, then LIGHT film of silicone. don't remember torque on castle nut. reuse the nut = tight as can be then line up holes for large cotter pin. Would you know of a seal number for center of this housing plate Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-556176 Share on other sites More sharing options...
Joey Mack Posted July 31 Share Posted July 31 Is that cover smashed? 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-556183 Share on other sites More sharing options...
mechohaulic Posted July 31 Share Posted July 31 4 hours ago, Joey Mack said: Is that cover smashed? you noticed that also. seems a lot bent up. big question based on picture is ; where is the seal which should have been in there?? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-556194 Share on other sites More sharing options...
Geoff Weeks Posted July 31 Share Posted July 31 (edited) I know nothing about this Mack axle (if you remember I thought it was an old Timken). That said, I would guess it originally had a graphite rope for a seal or a felt seal Edited July 31 by Geoff Weeks Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-556229 Share on other sites More sharing options...
mechohaulic Posted July 31 Share Posted July 31 not understanding this :: is this from the original picture posted when rear end still assembled or a second rear end seal housing ??? outer paint looks to be from original picture. where did the seal go ??? should be a normal seal( national /stemco etc). ALL the damage to housing ?? Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-556231 Share on other sites More sharing options...
Coulton Posted August 1 Author Share Posted August 1 On 6/4/2024 at 8:55 PM, mechohaulic said: looking at pics 3 & 4 showing bottom view of seal cover ; notice the pultruded section on seal cover between bottom bolts. that must line up on the rear housing allowing oil to return back to rear. chances are change over on seal number /style . might be a match it up , silicone may replace the gasket. mine it would be sheet of gasket material and small ball pien hammer to make a new one, then LIGHT film of silicone. don't remember torque on castle nut. reuse the nut = tight as can be then line up holes for large cotter pin. Yes this is from the original pic posted. The seal is completely wore right out. We have no idea why the cover is so bent and smashed. The only thing we can come up with is someone possibly wrapped a chain around and tried lifting it at the spline/cover area. I can’t even get seal out cause metal Is so bent Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-556236 Share on other sites More sharing options...
Coulton Posted August 1 Author Share Posted August 1 2 hours ago, mechohaulic said: not understanding this :: is this from the original picture posted when rear end still assembled or a second rear end seal housing ??? outer paint looks to be from original picture. where did the seal go ??? should be a normal seal( national /stemco etc). ALL the damage to housing ?? You can see some type of copper mesh all that left of seal Quote Link to comment https://www.bigmacktrucks.com/topic/74225-front-pinion-seal/#findComment-556238 Share on other sites More sharing options...
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