knuckle rebuild question need help? - Pirate4x4.Com : 4x4 and Off-Road Forum

kiwiwonder · 07-26-2004, 09:10 PM

I also posted this on ih8mud.com. I'm to the point where I measure the pounds needed to rotate the knuckle. I'm putting the scale on the knuckle arm and it measures way too little. I replaced the knuckle beerings. I have a medium shim on the bottom and a medium and big on the top. I do not have the sst tool to measure what size shims I should use. do I just try different sizes untill the pounds to rotate the knuckle are correct. I took out the medium on the top and the pounds were a lot better but only at 3lbs. what do i do? smaller on bottom? top? get sst tool to do it properly? can you rent it?

do most of you guys read both boards or just this one?

Pin Head · 07-26-2004, 10:50 PM

Usually the old shims are real close to the correct value. Since you are so close, I would take another .004" off the top. The purpose of the SST measurement is to center the axle with respect to the seal, so it won't leak. .010 either way probably won't make much difference. There are 4 sizes: .004, .008, .02 and .04 inches.

kiwiwonder · 07-27-2004, 02:47 AM

i'm not that close. to get 3 lbs on the fish scale test I had to take the medium shim off the top. putting it back the way they came off did not even give me 1lbs on the fish scale

tornadoalleycruiser · 07-27-2004, 06:38 AM

bottom shim stack is height, top is preload, it's all in the factory service manual. SST is a dream to use. Available from OTCSPX. If preload is all you want to change, it's the top shim stack that needs to be adjusted.

07-26-2004, 09:10 PM	#1 (permalink)
kiwiwonder Registered User Join Date: Jun 2004 Member # 32285 Posts: 10	knuckle rebuild question need help? I also posted this on ih8mud.com. I'm to the point where I measure the pounds needed to rotate the knuckle. I'm putting the scale on the knuckle arm and it measures way too little. I replaced the knuckle beerings. I have a medium shim on the bottom and a medium and big on the top. I do not have the sst tool to measure what size shims I should use. do I just try different sizes untill the pounds to rotate the knuckle are correct. I took out the medium on the top and the pounds were a lot better but only at 3lbs. what do i do? smaller on bottom? top? get sst tool to do it properly? can you rent it? do most of you guys read both boards or just this one?

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07-26-2004, 10:50 PM	#2 (permalink)
Pin Head Registered User Join Date: May 2001 Member # 4783 Location: Orange Co. CA Posts: 1,797	Usually the old shims are real close to the correct value. Since you are so close, I would take another .004" off the top. The purpose of the SST measurement is to center the axle with respect to the seal, so it won't leak. .010 either way probably won't make much difference. There are 4 sizes: .004, .008, .02 and .04 inches.

07-27-2004, 02:47 AM	#3 (permalink)
kiwiwonder Registered User Join Date: Jun 2004 Member # 32285 Posts: 10	i'm not that close. to get 3 lbs on the fish scale test I had to take the medium shim off the top. putting it back the way they came off did not even give me 1lbs on the fish scale

07-27-2004, 06:38 AM	#4 (permalink)
tornadoalleycruiser Registered User Join Date: Jun 2002 Member # 12451 Location: Kansas City, Mo Posts: 1,245	bottom shim stack is height, top is preload, it's all in the factory service manual. SST is a dream to use. Available from OTCSPX. If preload is all you want to change, it's the top shim stack that needs to be adjusted.