I lent my corner drive to the local hockey team while they were waiting for a new one to arrive. The guys that pulled it out said the bolts were *)$%# tight. When I put it back in should I use loctite on them? I know - - look in Da Book but Da Book is in Da Bus which is in Da COLD COLD shop.
Corner drive?
Is that a Canadian term?
What's the American equivalent?
Or is this headache really something I should be concerned about?
I also am curious as to what a corner drive,must have some other name or just something new to me Mike
Quote from: gumpy on November 14, 2006, 12:06:42 PM
Corner drive?
Is that a Canadian term?
Dunno what the 'murican equivalent would be & I don't know what else you would call the "right angle gear drive mechanism" that the radiator fan mounts to. What do you call it?
Do you mean the miter box?
Miter box? Thats something you cut wood with! Bob used the wrong terminology it is actually a dual corner box.
Nothing wrong with using Loc-tite on any bolt that you want to stay in place. There are different kinds for bolts that can be taken out with a lot of torque and and for bolts that require heat to break the bond. Use whatever kind suits your fancy for you application.
Wat Stan said . . . PLUS Now is a good time to use NEW bolts to put it back on. I'd consider grade 8 bolts as it would be better to over kill the hardware now rather than have them shear off after you loctite-ed them in place & your trip is interupted.
Thanks for the confirmation guys. Grade 8 fine thread with loctite it is then. Weather warmed up today so it might even happen tonight.
Loctite comes in several forms of strength required. I don't know the numbers, but some require the bolt or nut to be heated up before it can be removed. Once apllied that is the only way to take it apart. There are several that are removable, no heat involved to loosen. Just depends on what the need is. There is red, blue and green in color, to visually see which one you are using.
Hope this helps in some way.
Paul
Dreamscape
Be careful with Red Loctite. It's a PIA to remove anything locked with that stuff. Think of it as permanent.
I just wrote a book on why to not use it on a bell housing and then notice that a "corner drive" is on the other end of the engine. Duh! I deleted that...
Blue Loctite is the best for keeping bolts in place. New lock washers and hardware go a long ways too!
Best, JR]
HITH do you work on a cold bus? :o
I believe the two ended right angle drive coming from the DD crankshaft and connecting to the factory A/C on one side and the radiator fan on the other side is more properly identified as the miter (mitre?) box, not a corner drive.
Richard
Note that Bob said <what else you would call the "right angle gear drive mechanism" that the radiator fan mounts to. What do you call it?>
I don't remember what kind of bus that Bob is working on, but if the fan mounts on the box, it is not the miter box like on the back of an Eagle. The GM 4501 used a right angle gear box with a shaft drive on the input and the fan mounted directly on the output shaft. If the correct name is so important, maybe somebody with a 4501 parts book can look it up.
Stan -
Ask & ye shall receive, direct from a Scenic Shop Manual/Parts Book:
GBK-9850 BOX, gear (1:1 ratio) (FAN DRIVE ONLY)
FWIW & HTH. . .
;)
Quote from: Stan on November 17, 2006, 06:20:22 AM
I don't remember what kind of bus that Bob is working on, but if the fan mounts on the box, it is not the miter box like on the back of an Eagle. The GM 4501 used a right angle gear box with a shaft drive on the input and the fan mounted directly on the output shaft. If the correct name is so important, maybe somebody with a 4501 parts book can look it up.
That is exactly the situation although it is on a 1981 Prevost. This thread has deteriorated severely and really hasn't dealt with my question at all. My concern was vibration on the "corner drive" loosening the bolts and whether or not it would be wise to use loctite or more specifically whether there was any reason NOT to use loctite. I've come to my own conclusion.
And contrary to what I posted above I will NOT be using Gr 8 bolts. This is just my opinion but I think I will stick to what was there originally which was Gr 5 fine thread. If there are any issues about brittleness in conjunction with the vibration from the fan my personal opinion is that the Gr 5 will be a better choice.
And in answer to Mr Lynch - you work quickly, with frequent trips to the house, with a diesel fired shop heater or you wait for a warm day. Of course warm days could be in short supply until late April so that really isn't a good option.
BOB
I dont know if you have room ? but I have drilled the edge of the nut an also the edge of the bolt head. I then used stainless wire to keep all from turning( I used .o32 wire from my wire welder) just be careful while twisting the ends together,to tight and they will break. Hope this helps!
Dwayne
Bob: A few words of caution on that type of fan drive if you have to work on the box.
Make sure that the fan is balanced and a light weight plastic fan is preferable to a steel fan.
Any vibration takes out the front bearing in the box which puts the fan into the rad.
Make sure that the gears are properly set up. It is a tedious job shimming the two sets of bearings (even worse than setting a crown and pinion). If you take it apart make sure to mark the location of the gears. On a 1 to 1 gear set they always mesh on the same teeth and wear in that way. If you change the relative position you will have high spots and low spots which make it impossiible to shim properly.
I speak from experience because I didn't mark the gears and it took me two days moving a gear one tooth at a time to find the original location. After each move you have to reshim both sets of bearings and tightern everything down to test it. If you put the gears back in the original position it only takes about four hours to get the shims right. You want this gear box to turn freely with almost zero backlash.
Thanks Stan - I had mine rebuilt by a local machine shop about a year ago. It seems good but I will check the freeplay in it tomorrow before I put it back in. And yes I do have a plastic fan.