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Trunnion question
- Thread starter doughairfield
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toysrrus
Yoda
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Re: Trunnion question "Answered" Hopefully.
Hi Folks,
After thinking about this "Oil, Grease Seal" thing & looking at the "C Section" seal I have; I still did`nt think it was right.
So; I went to my "VB" current issue (TC.66 / Pg.91) catalog & surprised to see a breakdown on parts req`d. for "TR3 & TR4" Trunnions. They show "2" different P/Ns for TR3, TR3A & TR4. Also; "Pictorally" It appears to be correct & just might seal something!
Then, next to that; They show "Pictorally" the seal that I currently have and of course, a different P/N. This seal is for "TR4A, TR250.
Well; I ordered them + the seal for the Idler Arm, Which appears "Pictorally" to look different than the "O-Ring" thing I got from "Another Supplier".
I should have the parts by the end of this coming wk. & re-assembly will continue. Hopefully, Completed by the Weekend without any hick-ups!!
I`ll keep you folks posted.
Thanx, Russ
Hi Folks,
After thinking about this "Oil, Grease Seal" thing & looking at the "C Section" seal I have; I still did`nt think it was right.
So; I went to my "VB" current issue (TC.66 / Pg.91) catalog & surprised to see a breakdown on parts req`d. for "TR3 & TR4" Trunnions. They show "2" different P/Ns for TR3, TR3A & TR4. Also; "Pictorally" It appears to be correct & just might seal something!
Then, next to that; They show "Pictorally" the seal that I currently have and of course, a different P/N. This seal is for "TR4A, TR250.
Well; I ordered them + the seal for the Idler Arm, Which appears "Pictorally" to look different than the "O-Ring" thing I got from "Another Supplier".
I should have the parts by the end of this coming wk. & re-assembly will continue. Hopefully, Completed by the Weekend without any hick-ups!!
I`ll keep you folks posted.
Thanx, Russ
toysrrus
Yoda
Offline
Re: Trunnion question "Answered" Hopefully.
Howdy Folks,
Well; Here`s the latest up-date on the "Trunnion Seals & Locking Washers".
They arrived from "VB" yesterday & are exactly the same as the ones I currently have; "C" sectioned type seal thats shown for a "TR4A". I called VB, explained the difference to them & they went back to the warehouse & physically checked the 2 seals they have shown in their catalog. They`re re-sending the correct ones; I hope these will be correct. The seal between the Trunnion & Vertical Link is also the same which I have to presume is correct. I put 2 of them on & seems that will work just fine.
"LOCKING WASHER ASSY": I put a large Flat Washer with a std. Nut behind the Locking Washers & "Slowly" tightened them down & the Locking Washers went on just fine.
Now, On one side I`m past the hole for the cotter pins & the Trunnion movement is a bit tight, I think? I need "2" hands to make the Trunnion swivel "Freely". On the other side, I chickened out in over-tightening & hole location for the Cotter Pins is fine & the Trunnion swivels "Freely" using just "1" hand. Which is correct? I have to presume this is where the "End Float" comes into play? Do you folks feel that If I wacked both sides of the "A-Arms" with a "Hammer" carefully; That would release some of the "Tension on the Trunnion" or back off the nuts on the "Spring Pan"; (Which I hate to do that as I have everything there torqued & pinned); To allow a more "Natural" Tension Release on the sides of the Trunnions??
What would the Torque setting be on the Castle Nuts for the Trunnions?
Sorry about all these questions but I really want to do this only "ONCE"!!!!!
Thanx Much,
Russ
Howdy Folks,
Well; Here`s the latest up-date on the "Trunnion Seals & Locking Washers".
They arrived from "VB" yesterday & are exactly the same as the ones I currently have; "C" sectioned type seal thats shown for a "TR4A". I called VB, explained the difference to them & they went back to the warehouse & physically checked the 2 seals they have shown in their catalog. They`re re-sending the correct ones; I hope these will be correct. The seal between the Trunnion & Vertical Link is also the same which I have to presume is correct. I put 2 of them on & seems that will work just fine.
"LOCKING WASHER ASSY": I put a large Flat Washer with a std. Nut behind the Locking Washers & "Slowly" tightened them down & the Locking Washers went on just fine.
Now, On one side I`m past the hole for the cotter pins & the Trunnion movement is a bit tight, I think? I need "2" hands to make the Trunnion swivel "Freely". On the other side, I chickened out in over-tightening & hole location for the Cotter Pins is fine & the Trunnion swivels "Freely" using just "1" hand. Which is correct? I have to presume this is where the "End Float" comes into play? Do you folks feel that If I wacked both sides of the "A-Arms" with a "Hammer" carefully; That would release some of the "Tension on the Trunnion" or back off the nuts on the "Spring Pan"; (Which I hate to do that as I have everything there torqued & pinned); To allow a more "Natural" Tension Release on the sides of the Trunnions??
What would the Torque setting be on the Castle Nuts for the Trunnions?
Sorry about all these questions but I really want to do this only "ONCE"!!!!!
Thanx Much,
Russ
Willie_P
Jedi Hopeful
Offline
Re: Trunnion question "Answered" Hopefully.
russ-
I ruminated in other posts on this very board weeks (months?) ago on the same issues and here is a condensed recap of what I learned (and subsequently found out was "okay").
after tightening down the plate washers on the trunnion pins, it's "pretty stiff" movement and "freely" probably requires a strong single hand to rotate back and forth.
however, it was additionally suggested to use a piece of wood and a pretty strong whack from a hammer (or a couple whacks) on the back side of each lower control arm to outwardly force the arm-end (outward) against the thrust washer (after installing the nut, of course). this "freed" things up, but still - a firm hand and some muscle was required to move the trunnion. keep in mind, once you get the vertical link installed, plus the weight of the hub body on the spindle, the brake rotor, the wheel and ultimately the tire - that's a lot of lateral weight and those trunnions will move "reasonably freely".
as a newbie myself I was over-analyzing the force needed to move the trunnion bodies when installed - in a vacuum environment (ie - not imagining all the weight the wheel would add in aiding the trunnion to rotate).
slightly off topic; but a similar logic applies to the rotational stiffness of the installed vertical link and again (separately) the "free spinning" of the hub body on the spindle.
russ-
I ruminated in other posts on this very board weeks (months?) ago on the same issues and here is a condensed recap of what I learned (and subsequently found out was "okay").
after tightening down the plate washers on the trunnion pins, it's "pretty stiff" movement and "freely" probably requires a strong single hand to rotate back and forth.
however, it was additionally suggested to use a piece of wood and a pretty strong whack from a hammer (or a couple whacks) on the back side of each lower control arm to outwardly force the arm-end (outward) against the thrust washer (after installing the nut, of course). this "freed" things up, but still - a firm hand and some muscle was required to move the trunnion. keep in mind, once you get the vertical link installed, plus the weight of the hub body on the spindle, the brake rotor, the wheel and ultimately the tire - that's a lot of lateral weight and those trunnions will move "reasonably freely".
as a newbie myself I was over-analyzing the force needed to move the trunnion bodies when installed - in a vacuum environment (ie - not imagining all the weight the wheel would add in aiding the trunnion to rotate).
slightly off topic; but a similar logic applies to the rotational stiffness of the installed vertical link and again (separately) the "free spinning" of the hub body on the spindle.
toysrrus
Yoda
Offline
Re: Trunnion question "Answered" Hopefully.
Hi There Willy,
Thanx for the info. I spoke to my Brit Mech. Guru the other day & He basically confirms what you have said in your post.
So; Its done! I`m just waiting on those "Grease/Oil" seals that fit between the Vertical Link & Trunnion to come from VB & Ass`y. will be complete. Then the "Springs & Shocks" and "WaLa"; Finished, (I hope).
Thanx Again,
Russ
Hi There Willy,
Thanx for the info. I spoke to my Brit Mech. Guru the other day & He basically confirms what you have said in your post.
So; Its done! I`m just waiting on those "Grease/Oil" seals that fit between the Vertical Link & Trunnion to come from VB & Ass`y. will be complete. Then the "Springs & Shocks" and "WaLa"; Finished, (I hope).
Thanx Again,
Russ
toysrrus
Yoda
Offline
Re: Trunnion question "Answered" Hopefully.
Good Day Folks,
I rec`d. the "Grease/Oil" seals from VB. They sent me "Both" styles that are shown in their catalog (No Charge I may add).
The seal that I was hoping was going to be correct; "IS". Its an "L" shaped cross section and beveled on the inside (VB P/N 5-4072). In their catalog they show (P/N 5-4072) as being the correct seal for a "TR4" & (P/N 5-4073) as being the correct seal for a "TR3".
Well; They either have a typo in the catalog or their packaging is reversed (Labeled In-Correctly).
P/N 5-4072 is the "L" shaped cross section for a (TR2,3):
P/N 5-4073 is the "C" shaped cross section for a (TR4(A),250):
Final Ass`y will take place before the end of this Wk.
Regards, Russ
Good Day Folks,
I rec`d. the "Grease/Oil" seals from VB. They sent me "Both" styles that are shown in their catalog (No Charge I may add).
The seal that I was hoping was going to be correct; "IS". Its an "L" shaped cross section and beveled on the inside (VB P/N 5-4072). In their catalog they show (P/N 5-4072) as being the correct seal for a "TR4" & (P/N 5-4073) as being the correct seal for a "TR3".
Well; They either have a typo in the catalog or their packaging is reversed (Labeled In-Correctly).
P/N 5-4072 is the "L" shaped cross section for a (TR2,3):
P/N 5-4073 is the "C" shaped cross section for a (TR4(A),250):
Final Ass`y will take place before the end of this Wk.
Regards, Russ
TR3driver
Great Pumpkin - R.I.P
Offline
I'm not sure what happened, Russ, but the seal with the bevel inside IS for the later trunnions. The TR3 trunnions are wide and flat on top, the seal is shaped like a tire and it fits between the flat part of the trunnion and the flat part of the vertical link.
PS, the seal actually changed to the later style fairly early in TR4 production. So the VB catalog is wrong on that point. This is just one of the reasons I don't like doing business with them.
This is from the TR2/3 factory parts catalog :
PS, the seal actually changed to the later style fairly early in TR4 production. So the VB catalog is wrong on that point. This is just one of the reasons I don't like doing business with them.
This is from the TR2/3 factory parts catalog :
