M105A3 hub bearing nut and lock nut size

[ohsmily]

3.5" is too big. 3 3/8" is too small. Before I order any more sockets that are wrong, does any one have the specs for the M105A3 hub nut and lock nut size? (They're the same) This is driving me "nuts "(yuck yuck yuck)

ISSUE RESOLVED : 3 3/8" was the right socket. The locking washer tabs were bent over and had to be pried up.

 

[Guyfang]

Nut tech info

	THREAD CLASS	2B
	THREAD DIRECTION	RIGHT-HAND
	NUT STYLE	PLAIN, OCTAGON
	NUT HEIGHT	0.310 INCHES MINIMUM AND 0.315 INCHES MAXIMUM
	WIDTH ACROSS FLATS	2.969 INCHES MINIMUM AND 3.031 INCHES MAXIMUM
	THREAD SERIES	UNS
	FEATURES PROVIDED	CASEHARDENED
	THREAD QUANTITY PER INCH	16
	NOMINAL THREAD SIZE	2.438 INCHES
	BEARING SURFACE TYPE	CHAMFERED
	MATERIAL	STEEL COMP 1020 OVERALL
	MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-635 FED SPEC SINGLE MATERIAL RESPONSE OVERALL

 

[ohsmily]

Nut tech info

	THREAD CLASS	2B
	THREAD DIRECTION	RIGHT-HAND
	NUT STYLE	PLAIN, OCTAGON
	NUT HEIGHT	0.310 INCHES MINIMUM AND 0.315 INCHES MAXIMUM
	WIDTH ACROSS FLATS	2.969 INCHES MINIMUM AND 3.031 INCHES MAXIMUM
	THREAD SERIES	UNS
	FEATURES PROVIDED	CASEHARDENED
	THREAD QUANTITY PER INCH	16
	NOMINAL THREAD SIZE	2.438 INCHES
	BEARING SURFACE TYPE	CHAMFERED
	MATERIAL	STEEL COMP 1020 OVERALL
	MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-635 FED SPEC SINGLE MATERIAL RESPONSE OVERALL

I really appreciate the response. Are you sure this is for an M105A3, as opposed to an A2 or A1? The nut is close to 3.5 inches but seemingly under by a bit but not less than 5 3/8 given that socket won't go on there.

 

[Guyfang]

Your right! I am sorry!! To many Tm's open at one time.

NSN: 5310-00-741-1379
Part #: 7411379
NUT,ADJUSTING
2 5/8-16

Tech data:

	THREAD CLASS	3B
	THREAD DIRECTION	RIGHT-HAND
	NUT STYLE	PLAIN, OCTAGON
	NUT HEIGHT	0.305 INCHES MINIMUM AND 0.319 INCHES MAXIMUM
	END ITEM IDENTIFICATION	W/S; TRLR, CARGO, 3/4T, 2-WHL, TAM D08607; GUIDED MISSILE, INTERCEPT; TRAILER TANK, WATER 400 GAL, M149A2; CHASSIS, TRLR, GP, 3 1/2T, 2-WHL, TAM D00807; CARGO TRAILER, M105A3
	WIDTH ACROSS FLATS	3.344 INCHES MINIMUM AND 3.406 INCHES MAXIMUM
	THREAD SERIES	UN
	FEATURES PROVIDED	CASEHARDENED
	THREAD QUANTITY PER INCH	16
	HARDNESS RATING	89.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
	NOMINAL THREAD SIZE	2.625 INCHES
	COUNTERSINK ANGLE	90.0 DEGREES MINIMUM NUT AND 100.0 DEGREES MAXIMUM NUT
	BEARING SURFACE TYPE	CHAMFERED OR WASHER FACED
	MATERIAL	STEEL COMP 1015 OVERALL OR STEEL COMP 1016 OVERALL OR STEEL COMP 1017 OVERALL OR STEEL COMP 1018 OVERALL OR STEEL COMP 1019 OVERALL OR STEEL COMP 1020 OVERALL OR STEEL COMP 1022 OVERALL OR STEEL COMP 1023 OVERALL OR STEEL COMP 1025 OVERALL

 

[ohsmily]

Your right! I am sorry!! To many Tm's open at one time.

NSN: 5310-00-741-1379
Part #: 7411379
NUT,ADJUSTING
2 5/8-16

Tech data:

	THREAD CLASS	3B
	THREAD DIRECTION	RIGHT-HAND
	NUT STYLE	PLAIN, OCTAGON
	NUT HEIGHT	0.305 INCHES MINIMUM AND 0.319 INCHES MAXIMUM
	END ITEM IDENTIFICATION	W/S; TRLR, CARGO, 3/4T, 2-WHL, TAM D08607; GUIDED MISSILE, INTERCEPT; TRAILER TANK, WATER 400 GAL, M149A2; CHASSIS, TRLR, GP, 3 1/2T, 2-WHL, TAM D00807; CARGO TRAILER, M105A3
	WIDTH ACROSS FLATS	3.344 INCHES MINIMUM AND 3.406 INCHES MAXIMUM
	THREAD SERIES	UN
	FEATURES PROVIDED	CASEHARDENED
	THREAD QUANTITY PER INCH	16
	HARDNESS RATING	89.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 91.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
	NOMINAL THREAD SIZE	2.625 INCHES
	COUNTERSINK ANGLE	90.0 DEGREES MINIMUM NUT AND 100.0 DEGREES MAXIMUM NUT
	BEARING SURFACE TYPE	CHAMFERED OR WASHER FACED
	MATERIAL	STEEL COMP 1015 OVERALL OR STEEL COMP 1016 OVERALL OR STEEL COMP 1017 OVERALL OR STEEL COMP 1018 OVERALL OR STEEL COMP 1019 OVERALL OR STEEL COMP 1020 OVERALL OR STEEL COMP 1022 OVERALL OR STEEL COMP 1023 OVERALL OR STEEL COMP 1025 OVERALL

Well darn, it seems like 3 3/8 should fit given those dimensions...but it wont sleeve over. * sigh *

 

[Guyfang]

Tech data for the wheel bearing socket:

	WRENCHING SURFACE SIZE	3.375 INCHES NOMINAL SINGLE END
	DRIVE SURFACE SIZE	0.750 INCHES NOMINAL SINGLE END
	FEATURES PROVIDED	MANUAL TOOL
	WRENCHING SURFACE SHAPE	8 POINT SINGLE END INTERNAL
	DRIVE END SHAPE	SQUARE SINGLE END INTERNAL
	FUNCTIONAL DESCRIPTION	USED WITH TORQUE WRENCH TO TIGHTEN/LOOSEN TRUCK WHEEL BEARING LOCKNUTS
	MATERIAL	STEEL OVERALL
	SURFACE TREATMENT	OXIDE OVERALL
	STYLE DESIGNATOR	INTERNAL-INTERNAL
	SPECIFICATION/STANDARD DATA	05047-ASME B107.1 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
	NONDEFINITIVE SPEC/STD DATA	2 TYPE

 

[uniquify]

Maybe something like this? (Search on Amazon)
"OTC 1924 Wheel Bearing Locknut Socket - 8 Point, 3-3/8" Opening Size"

 

[ohsmily]

Maybe something like this? (Search on Amazon)
"OTC 1924 Wheel Bearing Locknut Socket - 8 Point, 3-3/8" Opening Size"

Thank you. That's what I bought. Frustrating. I'll get it figured out. Thanks guys!

 

[Guyfang]

Take a good look at the hub nuts, and make sure the locking washer tab is bent back. Someone could have rounded the corners of the nun.

 

[ohsmily]

Take a good look at the hub nuts, and make sure the locking washer tab is bent back. Someone could have rounded the corners of the nun.

Thank for this. The tabs of the lock washer was what was preventing the socket from sleeving over the bolt. It was all covered in grease and I didn't notice it until you brought this up and I dug around in there. The 3 3/8 socket works perfectly.

Thanks again fellas!

Now to figure out the torque spec when I put it back.

 

[Guyfang]

Been there, done that too!

Thats not in the TM? The torque spec? I think it is, if my old moth eaten brain is working right tonight.

 

[ohsmily]

It was quite a chore dismounting and then mounting the tire/wheel/drum assembly mostly because I did it alone. Heavy stuff. Do you guys leave the wheel mounted to the hub when you do this? Or remove the lugs and take the wheel off first to make things more manageable? I left the wheel/tire mounted to the hub and removed the whole assembly as one after taking the axle nuts off and sliding the bearing out. Heavy.

 

[Guyfang]

If there were enough slaves around, we left them together. But every time I had to do one, or say a M200A1, I separated them. Work smart, not hard!