mowerman Posted January 10 Share Posted January 10 On 1/9/2025 at 7:48 AM, terry said: I know if a gear bushing is replaced they say it has to be broached, don't know exactly how important this is. terry just had to throw this in,,,,for the longest time i thought your profile photo was a white 9000,,,,,just noticed recently it was not,,lol.bob 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566032 Share on other sites More sharing options...
terry Posted January 11 Share Posted January 11 (edited) 6 hours ago, mowerman said: just had to throw this in,,,,for the longest time i thought your profile photo was a white 9000,,,,,just noticed recently it was not,,lol.bob That truck in my profile came from Norm Taunton in Galt, California. Terry B733 Edited January 11 by terry Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566075 Share on other sites More sharing options...
mowerman Posted January 11 Share Posted January 11 I think we had this conversation a while back I’ve bought a lot of parts from him and sent a lotta guys over there I met him in Fontana California at an ATHS around 23 years ago he was driving his N model last time I saw him he just bought a gorgeous R model that didn’t need any thing I have pictures of it 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566080 Share on other sites More sharing options...
Lmackattack Posted January 11 Share Posted January 11 3 hours ago, terry said: That truck in my profile came from Norm Taunton in Galt, California. Terry B733 off topic. how is Norm doing. I have not spoken to him in a few years now. my last visit with him was probably 8-10 years ago now Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566096 Share on other sites More sharing options...
terry Posted January 11 Share Posted January 11 (edited) I haven’t heard from him in quite a long time either. He certainly is a ok guy! Terry Edited January 11 by terry 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566101 Share on other sites More sharing options...
Mark T Posted January 11 Share Posted January 11 I've been looking at the pictures at the beginning of this thread. I'm I seeing things or is there a speedometer sensor on the output shaft of the transmission ? Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566104 Share on other sites More sharing options...
mowerman Posted January 11 Share Posted January 11 I haven’t seen them either. I think the last time I was over there I was on vacation about six years ago. Somebody on here just talked to him recently because I sent him over there for something guy was looking for a bulldog, long eared within a year or so he was still with us. Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566148 Share on other sites More sharing options...
Popular Post Freightrain Posted January 11 Author Popular Post Share Posted January 11 8 hours ago, Mark T said: I've been looking at the pictures at the beginning of this thread. I'm I seeing things or is there a speedometer sensor on the output shaft of the transmission ? Yes, I have an electronic speedo thanks to Rob back about 15 yrs ago. I machined the reluctor wheel and the tail housing for the sender. Rob got the Speedo and sensor. Works flawless. Clean case NOS fork Clean bolts Gasket kit from PAI nhttps://i.postimSPAI GGS-3960 MAISSION GASKET KIT 8.5 4 2 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566154 Share on other sites More sharing options...
Popular Post other dog Posted January 11 Popular Post Share Posted January 11 20 hours ago, mowerman said: I think we had this conversation a while back I’ve bought a lot of parts from him and sent a lotta guys over there I met him in Fontana California at an ATHS around 23 years ago he was driving his N model last time I saw him he just bought a gorgeous R model that didn’t need any thing I have pictures of it I got a screenshot of the R Model. 4 Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566155 Share on other sites More sharing options...
mowerman Posted January 11 Share Posted January 11 OK, thanks for that Tom Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566156 Share on other sites More sharing options...
mowerman Posted January 11 Share Posted January 11 wow real nice job with the cleanup Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566157 Share on other sites More sharing options...
Popular Post Freightrain Posted Wednesday at 05:27 PM Author Popular Post Share Posted Wednesday at 05:27 PM I picked up my box of bearings yesterday so I got some assembly work done last night. I tried using the oven to preheat the bearings so they would drop on but by the time I ran through the snow to the garage, even having them wrapped up, they cooled off too much. I ended up using my small rosebud torch head to get them hot enough to drop on. Worked well. I got the countershaft in the main box, then set the back box on and tried seeing what the preload was with my old shims. Way too tight. Will work on getting more/making some. I will also get bearings mocked up for mainshaft to see what kind of shim pack I will need before pressing them on. Little by Little....... 6 2 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566500 Share on other sites More sharing options...
Joey Mack Posted Wednesday at 05:43 PM Share Posted Wednesday at 05:43 PM Is bearing pre load between.003"+.006"? Are you able to buy shim paper and cut your own shims. Ive done that a couple times.. just need a scissor.. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566501 Share on other sites More sharing options...
mowerman Posted Wednesday at 08:28 PM Share Posted Wednesday at 08:28 PM real nice work larry,,,,thanks for keeping us in the loop Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566530 Share on other sites More sharing options...
Freightrain Posted Wednesday at 09:37 PM Author Share Posted Wednesday at 09:37 PM 3 hours ago, Joey Mack said: Is bearing pre load between.003"+.006"? Are you able to buy shim paper and cut your own shims. Ive done that a couple times.. just need a scissor.. Countershaft is by torque using a fish scale and pulling a rope wrapped around the shaft. 8-11# pull if I recall. Mainshaft is +.001 Freeplay I think. Have to go out and read specs. I'll make shims but Kevin All is sending me a few pieces so I asked if he had any shims laying around. He said he had a trans with back box already off it. 2 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566548 Share on other sites More sharing options...
Geoff Weeks Posted Wednesday at 09:42 PM Share Posted Wednesday at 09:42 PM Given that somebody had been in there before (by the block oil to the bearing) I wouldn't trust anything. If I am the first inside since build, most times the same shims can go back and be correct. A local gear shop I used (past tense) was sending re-bearing pinions with 0 pre-load on the bearings! fortunately I saved the old spacer. They claimed I didn't know what I was talking about, and pre-load would burn out the bearings! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566549 Share on other sites More sharing options...
Joey Mack Posted Wednesday at 09:47 PM Share Posted Wednesday at 09:47 PM So using my 13% Building the mack transmissions I used to build, re-used bearings were set to .002"-.005" pre-load, and new bearings were set to .003"-.006" pre-load.. I beleive Eaton uses end play, i suck at those. I can kick the crap out of of the back boxes on many models, but sick at building the main boxes.. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566551 Share on other sites More sharing options...
Geoff Weeks Posted Wednesday at 10:32 PM Share Posted Wednesday at 10:32 PM roll this around your mind a bit: The British bus manual transmissions the output was on the counter-shaft, or the counter-shaft was behind the clutch shaft depending on how you look at it. This made the output "backwards" from the engine rotation! So the diff turned backwards but because there were spur gear final reduction between the diff and the axle shafts, the rotation was reversed once again. Diff was mounted below the axle shafts to keep the floor flat on the lower deck. Really would mess with your mind trying to figure out what was doing what-where! 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566552 Share on other sites More sharing options...
Joey Mack Posted Wednesday at 10:39 PM Share Posted Wednesday at 10:39 PM That is some intense knowledge.. GW.. you really bring some smart stuff to the forum.. I would have to see it, and still dont know if i would understand it early on.. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566553 Share on other sites More sharing options...
Geoff Weeks Posted Wednesday at 10:44 PM Share Posted Wednesday at 10:44 PM There was a British truck that used the same system, I don't remember which make, and someone thought "I'd really like more gears" and fitted a Roadranger only to find he had 13 spds in reverse and only 2 going forward! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566555 Share on other sites More sharing options...
mrsmackpaul Posted Thursday at 07:33 AM Share Posted Thursday at 07:33 AM MAN trucks were like that, German built Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566584 Share on other sites More sharing options...
mrsmackpaul Posted Thursday at 07:36 AM Share Posted Thursday at 07:36 AM But like many European planetary gears on hubs This allowed for a small diff center Some blokes went to great expense to change ratios only to find it exactly the same The final drive ratio eas in the hub, not the diff center 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566585 Share on other sites More sharing options...
BOBWhite Posted Thursday at 07:40 AM Share Posted Thursday at 07:40 AM 1 minute ago, mrsmackpaul said: But like many European planetary gears on hubs This allowed for a small diff center Some blokes went to great expense to change ratios only to find it exactly the same The final drive ratio eas in the hub, not the diff center Does the on highway (fast) stuff have planetary hubs too? I've only heard about them here on logging and mining trucks that top out at 35 or so. Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566586 Share on other sites More sharing options...
mrsmackpaul Posted Thursday at 09:17 AM Share Posted Thursday at 09:17 AM 1 hour ago, BOBWhite said: Does the on highway (fast) stuff have planetary hubs too? I've only heard about them here on logging and mining trucks that top out at 35 or so. Yes it does, very strange by U.S. standards I guess Mercedes Benz, Man, Leyland, Deutz and probably a lot more And yes on highway high speed jobs Paul 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566589 Share on other sites More sharing options...
Geoff Weeks Posted Thursday at 01:33 PM Share Posted Thursday at 01:33 PM (edited) The M.A.N's I worked on had planetary hubs, but a straight axle, The diff ratio could be a few different ratio's and the planetary hub did the bulk of the reduction. Kept shafting light and small. The British buses were different, the diff was below the plane of the axle shaft and used spur gear reduction up to axle shaft height. The hubs were conventional bearing on spindle type. From what I remember, going back over 40 years, the M.A.N's the trans, and driveshaft all turned in the same direction as the engine. With Planets, the reduction can be had in the same rotation, three sets of gears are used, sun, planet and ring. In spur gears when only 2 gears are used, driver and driven, the rotation is reversed. To keep it the same you need idler gears between the drive and driven. At one point, Rockwell/Meritor was offering the planet hub system to North America, From talking with heavy haul/ superload drivers, they have heat problems when run at high speed all the time, great for pulling but not so great for long haul high speed. Noisy also. The British truck I was talking about used the same trans/rear as the buses, so putting a conventional trans would reverse the ultimate output. From what I remember of the situation , the engine and trans were replaced with a conventional engine/trans set-up and that is why it ended up useless. They would have needed a counter rotation engine or a complete driveline swap from front to back. We did one of the British buses before I worked there with a counter rotation Detroit. I never saw it but heard about it from the other mechanic. To clarify the M.A.N. driveline buses would top out over 50-60 mph, the Heavy-haul operators were talking about heating up at speeds over 70mph coming home empty. I guess it is what you consider high speed. Edited Thursday at 01:57 PM by Geoff Weeks Quote Link to comment https://www.bigmacktrucks.com/topic/74958-rebuilding-my-triplex/page/2/#findComment-566599 Share on other sites More sharing options...
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