M1078 LMTV planetary hub setup

steve6x6x6 · Nov 13, 2016

I have so of these Meritor RF-12 ( M1078A1 and 2 on up) kits. These have 100% all of the planetary parts with end cap. This can really help some one that opens their hub up to find chewed up parts.

coachgeo · Nov 13, 2016

steve6x6x6 said:
I have so of these Meritor RF-12 ( M1078A1 and 2 on up) kits. These have 100% all of the planetary parts with end cap. This can really help some one that opens their hub up to find chewed up parts.

Do you know what differences there are in these and a kit for an A0?

agazza2 · Nov 16, 2016

Planetary gear setup tool - clearance check

Steve6x6x6 - could you draw up the dimensions for your tool you used for the Planetary gear clearance check? I would like to get one made prior to tearing apart my noisy front axle. A quick sketch would be great if you do not mind.

steve6x6x6 · Nov 21, 2016

agazza2 said:
Steve6x6x6 - could you draw up the dimensions for your tool you used for the Planetary gear clearance check? I would like to get one made prior to tearing apart my noisy front axle. A quick sketch would be great if you do not mind.

I have not forgotten your request. I will try and get it posted tonight. This tool is all ready obsolete, i use something else now.

DiverDarrell · Nov 21, 2016

Interested in your new setup for the hubs. Mine make a racket.

steve6x6x6 · Nov 21, 2016

Here is the drawing i whipped up. I have many leftover drive caps so i put some of them in the saw and faced them off in the lathe. I use these now to clamp down the cross pin. Place one pinion gear at 6:00 o'clock to check your clearance. The other 3 are have Gravity on them and will give you a false measurement. I need to make it clear, i am not selling anything, these are ideas for you to use. I do not have the time to run to UPS every day.

1951M1078 · Nov 21, 2016

Steve, how often will this be needed ? 5000,10000 ?? miles?

DiverDarrell · Nov 21, 2016

Wow! That is awesome! I would have never thought of that. I attempted to use a piece of precision flat stock bolted across the base to get the depth measurement like in the TM. But that method does not count in gear wear or variances in machining. Your way of actual gear lash is much more precise. If you had an extra one for sale I would be interested. Or else I may be shopping for a cap and have a machine shop make one for me.

steve6x6x6 · Nov 21, 2016

1951M1078 said:
Steve, how often will this be needed ? 5000,10000 ?? miles?

I have many axles to setup. Not mileage, every time you pull the hub you must do setup.

agazza2 · Dec 1, 2016

Thank you for taking the time to draw up the plans for the tool. Since the caps are not readily available, I will have my machinist make the tool for now. Your new method is definitely a more precise way of getting these measurements. I will also try to have something like that made with possibly 4 caps.

Your expertise is greatly appreciated as it seems that many M1078 members are having noise from their front axles. I have been able to find all the parts to rebuild mine, so looking forward to getting this done and having a quiet front axle without the worry of something going bad.

800summit · Dec 11, 2016

Does anyone know what size the bearing nut is? I need to get the right size so I can torque the bearings, also it would have to be a fairly deep socket to clear the front axle shaft.

DiverDarrell · Dec 11, 2016

I think it's 3 7/8"

800summit · Dec 11, 2016

Thanks

agazza2 · Dec 12, 2016

DiverDarrell said:
I think it's 3 7/8"

Yes, it is 3-7/8"

f8617 · Dec 12, 2016

its 8-sided, too.

800summit · Dec 15, 2016

is there a socket made deep enough to go over the axle to the bearing nut? the one's I have seen are not deep enough.

coachgeo · Dec 15, 2016

steve6x6x6 said:
Here is the drawing i whipped up. I have many leftover drive caps so i put some of them in the saw and faced them off in the lathe. I use these now to clamp down the cross pin. Place one pinion gear at 6:00 o'clock to check your clearance. The other 3 are have Gravity on them and will give you a false measurement. I need to make it clear, i am not selling anything, these are ideas for you to use. I do not have the time to run to UPS every day.

Considering making one and wondering if there would be any value to making it a 4 pronged cross instead as was done previous. Waste of time? Possible value?

800summit · Dec 15, 2016

I just want to torque them to spec, The back will not be a problem, because I can pull the Axle.

800summit · Dec 16, 2016

I got it, I made my own, took the 3-7/8 socket cut it in half and welded a 4" piece of pipe in between the socket and the 3/4 square drive. even painted it black to match the factory paint.

DiverDarrell · Dec 18, 2016

Steve, any idea what would make the ctis seal on a front hub continually fail? Ctis control box is disconnected, but still have all wheel hardware on. I only have 50 miles on the one I just put in, and now again have gear oil all over the wheel and drum again.... on a side note, do you know where I could find a hub cover to make your gear lash tool? Since I will be taking it all apart again.....

edit: Found and bought a hub kit with the cover included.

M1078 LMTV planetary hub setup

Well-known member

Attachments

Well-known member

Active member

Attachments

Well-known member

Member

Well-known member

Attachments

Well-known member

Member

Well-known member

Active member

Member

Member

Member

Active member

New member

Member

Well-known member

Member

Member

Member