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6 speed, PTO pump options


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17 hours ago, Full Floater said:

I have a shaft driven pump off the PTO on this 107 6 speed in an R model.   

I'm curious if I can do away with the shaft drive and remote pump, for a pump that's married to the PTO.   Does such a beast exist for a 6 speed?

 

Thanks,

Kevin
 

I think you’ll have to go with a side mount,why are u looking to change the rear mount,I like them better..

20230429_191952.jpg

 

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1 hour ago, MACKS said:

 

I am wanting to have a more compact setup and re-purposing the truck and need the room where the remote pump currently sits.

I'm curious as to why you prefer the rear mounts.   I honestly don't know the difference between the two

Edited by Full Floater
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OK....  so... when you remove this low mounted PTO off,,  first,,  drain the oil.  then after you get the PTO off or the whole thing, keep track of the shims, do not bend them or mess them up...   buy another bearing cap like the top 2, they are the same...  heres the other deal..  there is a bearing race inside the PTO bearing cover..  you will have to replace that bearing race. the proper way is to replace the bearing on the lower counter shaft as a set. which requires taking the back box apart..  so....  depending on your need and purpose of this truck,,,  you can get a lower bearing housing with a bearing race installed or buy a new bearing race... to install..  the shims are important and must be put back in..  Bearing pre-load is .002''-.005'' on re-used bearings..  So, its on you to feel good about the roller bearing condition, when you pull the lower cap off.  also, another very important thing...  before  you remove the PTO assembley, pull a side cover off and wedge a clean bar in there to hold the lower counter shaft in its position..  if it drops too low and moves slightly, it can be put back in place 1 tooth off..  A little pressure from the bar pushing UP is ok.. It will keep the lower counter shaft timed..  then when you SLOWLY install the new lower cover, before you tighten it up (done)  you can pull the bar out..  I hope I help you here..  keep in touch.. Jojo

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33 minutes ago, Joey Mack said:

OK....  so... when you remove this low mounted PTO off,,  first,,  drain the oil.  then after you get the PTO off or the whole thing, keep track of the shims, do not bend them or mess them up...   buy another bearing cap like the top 2, they are the same...  heres the other deal..  there is a bearing race inside the PTO bearing cover..  you will have to replace that bearing race. the proper way is to replace the bearing on the lower counter shaft as a set. which requires taking the back box apart..  so....  depending on your need and purpose of this truck,,,  you can get a lower bearing housing with a bearing race installed or buy a new bearing race... to install..  the shims are important and must be put back in..  Bearing pre-load is .002''-.005'' on re-used bearings..  So, its on you to feel good about the roller bearing condition, when you pull the lower cap off.  also, another very important thing...  before  you remove the PTO assembley, pull a side cover off and wedge a clean bar in there to hold the lower counter shaft in its position..  if it drops too low and moves slightly, it can be put back in place 1 tooth off..  A little pressure from the bar pushing UP is ok.. It will keep the lower counter shaft timed..  then when you SLOWLY install the new lower cover, before you tighten it up (done)  you can pull the bar out..  I hope I help you here..  keep in touch.. Jojo

Wow!  MANY THANKS for taking the time to write that post.  All of which is news to me!   I might want to re-think this whole ordeal 

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if the PTO work's,,, run-it..  I dont want to 'scare anyone here'  so I WILL, take the time to write the info. No need to re-think what you want to do, unless you may not have the skill set to do the repair..  I mean that with full respect..  I hope I didnt offend you..   jojo

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this type of procedure it is better to scare someone in doubt of doing the job. WITH TOTAL RESPECT also. pull back on the shaft internal shimms may drop ::correct? it's been a while. should a rear mount P T O be removed and replaced with side mount is it necessary to turn counter shaft back to180 position for a flat recover to fit properly ???? I may be misreading with purpose to remove remote pump , and keep rear mount P T O with self contained pump?

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the side mount PTO uses a seperate gear, no timing required..  prying up on the lower countershaft keeps that shaft 'timed' while the work is being done..  the bearing cover for the lower shaft is the same as the upper (2) if you decide to not use the lower for a PTO drive..  

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9 minutes ago, Joey Mack said:

the side mount PTO uses a seperate gear, no timing required..  prying up on the lower countershaft keeps that shaft 'timed' while the work is being done..  the bearing cover for the lower shaft is the same as the upper (2) if you decide to not use the lower for a PTO drive..  

have designs changed ; if lower rear cover is reinstalled, doesn't the small external shaft near cover have to be turned back and freeze out plug or5/8bolt installed?? to install a rear mount pto after drain/remove cover/knockout center freeze out plug , install 5/8bolt and very gingerly pull back shaft ( 1 1/8 socket ?over shaft)+no more than 1/4 in or shims fall internally. open end/ adjustable wrench and turn shaft 180 degrees so a new pto will fit.

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DON'T BACK OUT;   your info more correct based on newer units. my failing memory goes back to when things like rear PTO's were BRAND NEW items. I did a few  ;remember the warnings of pulling/turning small shaft near lower cover. NOT ONE OF THE THREE COUNTERSHAFTS  shaft stuck out 3/8th in with slot cut in it. rear cover held shaft in some what. tapered press fit in trans housing. rear pto housing wouldn't fit flat without turning shaft.  might have been used for oil return to trans after pto installed

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1 hour ago, mechohaulic said:

this type of procedure it is better to scare someone in doubt of doing the job. WITH TOTAL RESPECT also. pull back on the shaft internal shimms may drop ::correct? it's been a while. should a rear mount P T O be removed and replaced with side mount is it necessary to turn counter shaft back to180 position for a flat recover to fit properly ???? I may be misreading with purpose to remove remote pump , and keep rear mount P T O with self contained pump?

may have confused things stating  "necessary to turn COUNTER SHAFT back 180 position"". not one of three main countershafts. sorry all.  possibly better title would be rea  auxiliary shaft? not sure of proper name description. 

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When I had my drop axle installed we had to switch from a rear mount to side on a 12 speed trans,don’t remember my mechanic saying it was a big deal but next time I see him I’ll ask,sounds complicated to me..

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5 minutes ago, MACKS said:

When I had my drop axle installed we had to switch from a rear mount to side on a 12 speed trans,don’t remember my mechanic saying it was a big deal but next time I see him I’ll ask,sounds complicated to me..

1= a 12 speed may be a different "animal" in terms of  PTO  internal drive options. would have to be or else the dump pto speeds depend om main in gear. 2=i more then likely confused the issue with improper explanation of early style pto change over

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Thanks very much everyone.

One more question, which perhaps has already been answered and I missed it?  ....but is there an option for a married pump to mate to the rear mount existing pto?  Since it sounds like a wise idea to leave the pto itself, alone.

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On 4/30/2023 at 7:54 PM, Joey Mack said:

I'm lost, Mech... I'm thinkin about 107"s  are you talking TRD72's and such..  ??  I may need to back out, so I dont post wrong info..  

think I know where  confusion came to be. memory serves correctly; at 2am today staring at ceiling ;;the EARLY 6 speeds had roller bearing for three counter shafts  , not bearing/ race combo .when removing lower rear cover for PTO installation there wasn't a bearing race in cover. just a "flat" aluminum cover. hardest part to pto install was turning small idler shaft. never had a situation with dropping countershaft and misaligning timing. spent many hrs in machine shop at Mack and watched the man I considered to be the Master builder. He always prefaced the importance of the timing. a rear 6 speed pto install was done in short amount of time  then. the pto went up against bearing /held it in place. 

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That is before my time Mech..  I started out on X107 and 1070B.. then 200 series, and then 300 series. Bearing race is in the bearing cover, so pulling the cover allows the counter shaft to drop a little.. 

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