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In this Discussion
- 1951hornethardtop August 2011
- bob ward May 2011
- brumac May 2011
- Geoff C., N.Z. May 2011
- hornet53 August 2011
Stepdown Kingpins
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I am going thru the front suspension of my 54 Hornet Special that has 70,000 on the odometer, replacing the kingpins, upper and lower outer pivots and springs. The inners are nice and tight, no play is evident. I find that the manual says that there are pressure relief valves at the lower king pin cup and I find grease fittings on my car in place of the relief fittings. I believe that this area of the car has never been repaired or replaced. Can someone tell me what is correct, grease fitting or pressure relief?
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Originally there was a pressure relief valve fitted in the bottom of the stub axle. the idea being that when the pressure got up the point that is was able to spread through the bottom bushing the valve would give, and the grease would then come out the bottom. However this relief valve sometimes seems to allow the grease to get out with very little pressure on the gun, and a grease nipple or bung was fitted to allow the lubricant to spread up the bushing better. The king pin is hollow, so there is only need for the top grease nipple. Hope this explanation helps.If you're stuck in a hole, stop digging.
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bob ward wrote:The other reason a grease relief valve was fitted, was to stop bubba pushing out the plug at the bottom of the kingpin with too much grease and/or pressure.
I was recently checking out the suspension on my Hornet and found that "plug" missing. Where would I find new one? Am I stuck removing one off my parts car and installing it on the driver?1953 Hornet sedan Twin-H
Custom front springs, drop-blocks out back, Clifford 6-2 headers exiting out back shotgun style, Pertronix, and Flames!
1964 Chevy C-10 Longbed, 396/TH400 lowered just enough and \"easy to touch up\" Black paint.
2003 Ford Crown Victoria Police Interceptor
Caved in quarter and fender. Bad paint. Non-True-Trac heap. But it's paid for. -
Those pressure release valves sometime pushed out if the valve wasnt working right. In the old days the grease guy would put a tire iron on the plug and pry up on the plug to prevent it from being pushed out until the valve would release. proboly not the best solution but it worked. Never had to replaced a king pin.
