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Joined: Dec 2001
Posts: 16,156
In a hot industrial environment we use to pull the fitting and squirt Sili-Kroil (we simply call it Kroil here) into the hole and let it sit long enough to smoke a cigarette then shoot the grease to it....I'd say at least 95% of the time it worked.

1937 Chevy Pickup
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1952 Chevy Panel
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1950 Chevy Coupe
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I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile
Joined: Aug 2013
Posts: 282
I just picked up a old Snuff can full of old grease fittings all different sizes and packed full of smelly old grease. I dumped them in a glass jar of kerosene and let them soak for a week they came out great, now I have lots of replacement nipples and they aren't the cheap 1 dollar variety that twist and break when you install them.

1950 Chevrolet 5-Window Canadian manufactured 1-Ton with Dump Bed / Hoist
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You will never stop learning new things, no matter how old you are.
Joined: Aug 2005
Posts: 573
Kinda hard to put Made In China grease zerks on my project, had to do it though... Did soak some in lacquer thinner overnite, cleaned up nice

Joined: Aug 2013
Posts: 123
Originally Posted by crenwelge
While you are replacing the grease fittings, use a small screw driver to clean out the hole. If the last grease that was used was the old soap based grease, its hard as a rock by now.

I found replacing a few of the zerks doesn't solve the problem. Driver side King Pin being one of them. Is stated above the best way to solve that problem?


1942 BK 1/2 Ton Pickup
1954 3800 1 Ton Pickup
Joined: Dec 2013
Posts: 1,123
Former BMW Rider
I had an old tractor mechanic tell me to heat the area around the zerk with a torch, just enough to soften the old grease. I also cleaned the zerks and bushing cavities out and then shot some new grease in. It worked quite well for me.

Good luck,


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"I proudly Stand for the Flag and Kneel for the Cross" Unknown
Joined: Dec 2001
Posts: 16,156
....and jack the truck up and see if it helps to get the weight off the wheels. With a helper it might be possible to get him to wiggle/turn the wheels and get the king pins to take the grease??
Its worked for me a time or two but maybe mine was not quite as bad?

1937 Chevy Pickup
In the Gallery []
1952 Chevy Panel
In the Gallery []
More photos []
1950 Chevy Coupe
Pictures! []

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile
Joined: Jul 2010
Posts: 619
Shop Shark
Dave and Randy submitted a good Tech Tip about replacing kingpins that explains why the front axle should be jacked up when greasing.

I greased mine a couple weeks ago and had one fitting that wouldn't take grease. A little heat solved the problem.


Joined: Jun 2008
Posts: 1,769
I need to spend time under the truck today giving it a complete grease job. Hasn’t been done in many years. Want to do it right, so what is the correct type grease I should buy today?
Black, red, white..... they all seem the same to me. Thanks.

1950 Chevy 1/2 ton (all original)
1951 Chevy 1/2 ton (future streetrod)
1941 Chevy coupe
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Joined: Oct 2014
Posts: 142
Shop Shark
Somewhere I have a an old tool that belonged to my Dad. Not sure what it is called and don't recall ever seeing another one. The cap end screws off and pack it full of grease. Screw the cap end back on, put the fitting end on the clogged grease zerk and tap the cap end with a hammer. My Dad used it on all the farm equipment and vehicles. It clears nearly all clogged grease zerks.

Last edited by lynngrove; Sun Jul 07 2019 11:45 PM.

'53 3100 5-window
'57 Mercury Monterey 2-Door Sedan
Tim H
Joined: Jun 2011
Posts: 4,977
Be careful when purchasing new Zerk fittings, the metric ones are hard to distinguish when out of the container.


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
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