I am looking for front axle slack adjusters for a (i think) 1972 ln800. The line sheet says D0HA-2010/D0HA-2011 front brakes and the exploded view shows part numbers 2308 RH and 2309 LH. It also shows a service kit 2090 which would be acceptable too. Help please.

 

Take one off and take it to a good none OEM parts supplier. They need to know some information Like 28 splines on an 1 1/2" shaft with the center of the holes 6" apart. Dirt cheap, replace them.

 

Thanks for the reply Tenwheeler but been there and done that. I was hoping to come up with a Haldex or similar but no joy for me! It has a unique extra fine spline on the s-cams, I lost count at about 45sp. I am still open to suggestions.

 

Hate to here that. Can you change the S-cams? Maybe message NumberDummy because he comes up with some stuff you would not believe.

 

OK the 2308 RH & THE 2309 LH is the S-cams the 2090 kit is the bushings & seals kit,slacks are interchanagable,so no RT or Left. some clam shell outer bushings will be marked L&R acording to the location of the grease fitting. the fitting should always be on the outside of the cam mounting plate,not directly against the slack.

 

Google Haldex KN52050
it's 1 1/2", 48 spline, 5.5" span for Ford Apps
Haldex shows a active number so their still available.

Michigan Truck Spring has them on line for around $38
You can have your local truck parts dealer check that number to see what they can get them for.

 

Thank you Destroked 450, just what I was looking for!

 

Stupid question, but it's been many years since I've worked with big stuff- slacks should be snugged up and then backed off 1/2 turn to properly adjust them, correct?

 

yes that will get you 90% close and good enough. you need to measure the stroke on each one after that adjustment to get them by the book and even with each other. the measurement is unique to each application and is the subject of another nature!

 

Tightening the slack adjusters and backing them off 1/2 turn should get you 3/4" stroke, but I have seen trucks with badly worn brakes have nearly 1 1/4 stroke at that adjustment.
Max stroke is 2" and anything over 1 1/2" is considered unsafe.

 

It is important to check travel. All slack adjusters are not created equal and I have seen some oddballs that had to be backed off 5 turns. Maximum travel allowed changes with the size of the chamber and runs from about 1 1/4 through 2 1/2 inches. That is measured travel on brake application. To my understanding 5/8 through 3/4 by hand application is acceptable for all of them. That is pulling them with a J hook tee handle, prying under the clevis jam nut with the end wrench ( side of wrench on chamber mounting stud ), or something similar. On auto slacks I just snug them up a bit to the desired travel. If they are off more than that something is wrong with it.

 

Great info, thanks for everybody's input!

 

I R&R Everything so theres no slop,thats 1 of our older Fruhauf 40'ers with side doors.We run Vancos,Great Danes & now Utility's a mixed fleet & Maxon Lift Gates also.

 

take it to a good parts supplier was what worked for me, I even bought a lot of tools a heavy duty truck brakes trying to fix it myself and I couldn't

 

Thanks Destroked, maybe just what I need 1950 Ford left front fine spline.