ISX 600 Engine brake

[mHolc]

(05-30-2016 )Unilevers Wrote:  there is a setting in the ecm for jake delay - if it is set to zero they should come on immediately.

under the cover there are 2 solenoids and a harness, they are very forgot about pieces. If the solenoids are wore (fairly certain they are) they have a delay to them. if the jake rockers themselves are wore, the jake can do funny things. if the harness is kinda bad, it can cause jake delay. all these need to be checked by someone who has experience in these. this is fairly common - the jakes should be instant without delay if the delay is set at 0. How much boost does it build under full jake? that explains alot also.

one last thing to check is the oil and sludge buildup in the rocker drillings themselves. if they are plugged up or the wrong oil is used jakes will be delayed aswell - just food for though

Ok thanks,
Ive been swamped with work last couple months, haven't had the time to check anything out, but am ready to start on simple stuff first this weekend. Today i put the cruise on, probably first time ever! I noticed the Jake comes on slightly sooner with the cruise switch in on position? Odd! Cause on the CATs we have , if switch is on the Jake is delayed till u switch it off. Well i noticed the Jake works a sec sooner with just the power switch on, not set at any speed! Just on. Weird!
Thanks for all the pointers, gonna start on it this weekend.