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Cracked radius arm bracket

DeerSlayer

Well-Known Member
Joined
April 14, 2004
Messages
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City, State
Washington State
Year, Model & Trim Level
'93 Sport
Was diagnosing a bad starter tonight and I found my mystery clunk when going over bumps. Looks like I don't have long before the radius arm goes all the way through the cross member.

How hard is the cross member to replace? Can I do it with just a jack, jack stands and a impact gun? Or does it need to go up on a rack? Can I even find this part?

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It looks like your rivets were already replaced with bolts. If they were all changed, then its not that bad.

One of the methods to change the RA bushings is to drop those brackets anyway. I've gotten to the point that I can change the RA bushings (which means the brackets come down) is well under 2 hours.. including clean up and lifting the explorer.

I too have had a bracket break..
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I also bent the bracket some..
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~Mark
 






Just be careful and do one bracket at a time as those brackes are the only thing keeping the front end from rotating on the axle pivots.
 






Sorry to see that man. I have the same issue with the passenger side of my 94 explorer. Went to advance and got a set of moog bushings for around $50, used radius arm from the junk yard for $15, $40 to rent a coil spring compressor from auto zone. A day in hell if you ask me.

I did not install the new bushing a friend of mine did, About two weeks ago. I have to replace it again on that side, They put them in wrong and the thump when going over bumps is still there.

The really bad news is, My new tires, less then two weeks old. The front passenger side is wearing out extremely fast on the outside thread. The radius arm is throwing the tire out of alignment and causing excessive wear. So I'm not only out $25 for the bushing being put in wrong, but $80 for the tire, Not counting my time.

Good news for you. Ford sells the mount (cross member) you need for $101. That is what they told me, You drill out the old rivets and bolt the new one in its place. Mine is not cracked but worn from the radius arm smacking it for so long. I just got my explorer less then a month ago.

I'm fixing mine this Thursday. Using an air powered chisel to knock the rivets out and bolting my new one in place. My explorer is a bottomless money pit. May be cheaper to torch it.

Good luck and I'll keep my eye on this thread and help you where I can.
 












There are a bunch of threads on here about replacing the Radius Arm Bushings which is basically what you need to do. In your case you MUST you the pull bracket method since you are changing the brackets.

Figure 5-6 hours to do it for the first time.. Next time, it will be much quicker.

~Mark
 






Thanks guys! I thought I'd finally have to scrap it this time (185,000+ miles). It also gives me an excuse to buy an impact gun!

You can get the brackets and napa, advance, oreilly or any of the auto part store. There around $40 a side.

Looks like the price went up (~$67)at Napa but they do show it on their website.

Napa P/N: NCP2746007

Edit, spoke too soon Schucks shows it at 40 bucks
Schucks:
LH: K9947
RH: K8778

I guess I should do a search on replacing the Radius Arm Bushings but it appears all I need to do is lift the front end by the frame and start unbolting one side at a time? BTW the Left side (Driver) is cracked but the passenger side is not.
 






What did you need a coil spring compressor for?

I may be mistaken but when I swapped out my RA I had to rent the coil spring compressor to remove the coil, The RA is bolted under the coil and if your replacing or changing it the spring needs to be safely removed. Make sure you buy a really deep, deep well 1 1/8 socket. The one I got from tractor supply company was an 1/2 to short and I had to cut off that much from the bolt to remove the RA.

The bracket the RA slides through is still stock on mine, meaning it has them rivets.

My last employer is a steel fabrication plant where I was planning on buying an oversized washer about 1/4 thick and welding it on the back side of my RA bracket to prevent my RA from bouncing around so much. I believe it would work as a quick and cheap fix. Fixing mine on Thursday but still unsure how I will go about it.

If I fix mine right the first time I should get at least 100k more miles from her before that side goes again. The other side still looks great. 183k miles and going.

Edit: Just remembered my 33% discount at napa. That could help quite a bit. :)

My RA had a large dip in it from bouncing around when the last owner did not want to fix it. That's why I replaced mine.
 






Not trying to highjack this thread but I have a related question about this issue. What would happen if my RA bracket were to brake completely and my RA had nothing holding it anymore in the back?

I think it would bad, But mine should be fixed sometime tomorrow. :)

Thanks
 






1/2 done.

Took me a month to get around to it but I finished the Driver side this evening. Not too bad for the do-it-your-selfer.

Here were my findings:

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Grim at best.

I noticed that when Les Schwab did the RA bushing replacement 4 years ago they put two washers in front of the RA bushing. IE they left the stock Ford washer AND put on the new washer. I left it this way because I read that this can help prevent shaking at High Speeds. My explorer used to shake at 55+ before Les Schwab did this, now it only shakes at 75+. I assumed it was improved just from having new bushings and new tires until I noticed this tonight.

My Process for the LH bracket/ bushings with Rivets previously replaced:
1) Wear gloves for the knuckles and safety glasses for the eyes. My 'Splorer was constantly dropping crap on me. And I still have scars from the frame last time I worked on it.
2) Buy/ Barrow an impact gun, It's worth it.
3) Remove the two 1/2" nuts on the fuel filter bracket inside the left frame rail.
4) Loosen the 4 bolts that connect the two RA brackets. Mine had nifty psuedo weld nuts/ nut plate on the back side so it was just a matter of VVVT! VVVT! VVVT! VVVT! from the bottom with the impact wrench and they where loose.
5) Loosen the nuts that were rivets in the side of the frame. I could get to the forward one with the impact gun by deflecting the wheel splash shield forward but I could only get to the rear one with an open end wrench.
6) Use a breaker bar to get the RA Nut loose then the Impact gun to remove it. My Nut was a lock nut (the pinched type).
7) Remove the rear portion of the RA Bushing.
8) Chock rear Tires
9) Jack up at Center Diff until Left Wheel is just of the ground.
10) Support Left side of truck with Jack Stand
11) Remove the two bolts directly above the Radius Arm. Again mine had a nut plate so I didn't have to put a wrench on the back side. I could get a 3/8" drive ratchet on the front one but had to use a combination wrench on the rear one. I removed the front one first so that the rear one didn't run into the RA bushing as it came out.
12) When you remove this last bolt the RA bracket and RA should drop down. The wheel may go with it which is why I only jacked it far enough to be just off the ground.
13) Remove the front part of the RA bushing from the RA.
14) Clean and regrease the RA bracket.
15) Install new RA bushing to Radius Arm.
This is where it gets a little tricky. My Radius arm didn't want to fall right back into place on the frame. Here is my process.
16) Get a buddy you trust to operate the floor jack on the front dif while you put the bracket into place on the frame. You don't want some idiot dropping the truck on you. :thumbdwn:
17) Raise the truck off the jack stands and remove. Slowly!!!!! have your friend and/or trusted relative lower the truck back down until the bracket lines back up with the holes in the frame.
18) Put the jack stands back in to hold it in place.
19) Start the two side bolts to hold it loosely in place.
20) Then loosely put in the rest of the bolts so the bracket isn't going to fall out but is still loose.
At this point I found the radius arm was in place but not far enough back to put on the bushing washer and nut. Here was my crazy idea:
21) Jack the truck off the jack stands and remove them. Your Radius arm is still in the right place but too far forward to get the nut on.
22) Get the wheel off the ground and put a piece of 2" angle iron under the front half of the front tire. Have your buddy SLOWLY lower the truck down onto the angle iron.
Because the truck is in park with the parking brake on and the rear wheels are chocked the front tire will roll down the angle and force the front axle rearwards. This pushed my Radius arm right into place. I was able to start the nut on the rear. Jack the truck back up and put the jack stands back and started to bolt everything back up.
23) I started with the bolts that where rivets first since the rest of the holes had slots either in the frame or RA bracket. This would align the bracket where it needed to be.
24) Then I did the 4 bolts in the center.
25) Then the two bolts above the Radius Arm
26) Then I did the RA nut.
27) Finally I torqued every thing down.
28) I used 85 ftlbs on the RA nut, and butt-pucker tight on everything else that I couldn't get my torque wrench onto.
Note: all of the new hardware provided with the Moog RA brackets use Lock Nuts.

I only did one side so far because I was pressed for time and my passenger side RA Bracket isn't cracked. My old bushings came out in decent shape too.


Numbers should go with steps above:
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My Radius Arm Placement tool::thumbsup:
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The one side alone took about 5 hours including:
Cleaning the garage, moving the truck in, Removing the old bracket, Eating Dinner, putting the new bracket into place, Dessert (mmm, pie), Torquing everything down, cleaning up, taking a 20 min test drive and inspecting for any loose hardware.

The truck rides a little firmer and hard braking is much more solid and straight.
 






Looks nice, what brand are the blue RA bushings. Look kinda cool. Come along can work for moving the front end around also.
 






They look like the same Moog bushing I purchased from advance auto for about $45. I'll dig up the box later and get part #'s and see how much it actually cost. I only used one set of bushings so I have another set in the box.
 






They look like the same Moog bushing I purchased from advance auto for about $45. I'll dig up the box later and get part #'s and see how much it actually cost. I only used one set of bushings so I have another set in the box.

Yup Moog:
My order from Schucks:
K80007 Moog Radius Arm Bushings (Includes both sides and washers) $44.99
K8778 Moog RA Bracket (RH) for 4x4 $39.99
K9947 Moog RA Bracket (LH) for 4x4 $34.99
 






Yup Moog:
My order from Schucks:
K80007 Moog Radius Arm Bushings (Includes both sides and washers) $44.99
K8778 Moog RA Bracket (RH) for 4x4 $39.99
K9947 Moog RA Bracket (LH) for 4x4 $34.99

The brackets are cheaper there then at advance ;)
About $49.99 at advance, somewhere around there.

Great write up by the way.

I have to do this at some point because my old worn out bushing caused the RA to bounce up and down and wore out a good sized groove in the top of the bracket. Maybe an inch deep. I just put on a RA from a local junk yard because mine was pretty beat up. But for now with just new (now needing replaced again) Bushings it seems to have settled in and no longer smacks around under there. Maybe it will last like this until I get new extended JD RA's :D
 






Shopped around

tried a couple of places for parts and spent $131.14 total shipping and everything and this is what I got

Moog 80007 Bushings Heat tempered probably didn't need them, the regular ones probably are just fine.
Moog 8778 RH bracket
Moog 9947 LH bracket
Moog #? bracket bolts (can return if not needed)
Moog #? heat shield.

used Auto Parts 123 and Amazon.
Good luck to you all.
Can't wait to do another winter fix up project (last year did thermostat outside in 17* weather, snowing and windy), ohh sooo funnnn!!!

Happy Veterans Day Y'all!
 






Ahahahaha, I'm just now getting around to doing the passenger side and I'm using my own writeup as a reference! I got it all apart and I forgot if step 14 existed or not. So far the passenger side is about the same as the driver side. The only significant difference so far is that the exhaust is in the way of the RA nut, If you have a more compact impact gun it might be easier, I had to finagle the exhaust and my gun and jack the Right axle UP so that the back of the radius arm wasn't pointed up.
 






Just wrapped up for the night. It was easier this time and a bit shorter but I'm still not in a hurry to do it again. The truck has got 193K on it so something major has got to give right?
 






Rock auto online ... 33 bucks a side
 






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