Johnson bar

The shorter handle is usually the Caterpillar brake saver. A hydraulic engine retarder “brake” that is installed on the flywheel.

 

Shotgun! Lol! Beat me by that much.

 

I have never heard Johnson bar, we’ve always called it a chicken stick!

 

Round these parts its called a spike.

 

I doubt it ;in the youtube video"Peterbilt 359 Restoration episode 17 cold start" is to see that both are identical with the inscription:"Not for parking" and both have airconducts;I also I have seen it an a old truck in France also with air conduct on it and the truck had a cummins engine and no brakesaver of any make

 

Well my W900A Kenworth has a 3406 CAT with the Brakesaver and both levers are identical with the same "Not For Parking" inscription.

The retarder itself is hydraulic but it is actuated by an air valve.

 

Thank You for the information ,but there is stil a mystery about an old Diamont-T I've seen in France,It was a WW2 tank transporter who was transform with a fifth wheel it had two johnson bars and about 10 cilindric
air reservoirs behind the cabin ,the owner told that it have no retarder but I forgot to ask why it have two
johnson bars,At this time the truck dos'nt exist anymore it was scraped many years ago;.again thank You for your information.