My Jacobs Engine Brake doesn seem to have the retarding power it used to, whats the most likely cause?
There are a number of things that may have affected your engine brake performance, and a qualified service technician is best suited to find the cause. In general the same factors that affect positive power performance affect retarding as well. You should always check positive power performance before looking at a retarding performance problem. Assuming your engine is functioning as specified in positive power there may be a problem with the engine brake or its control signal. If the brake was functioning well before, the first thing a technician will do is check to see if all of the housings are working. It may simply be a housing with a loose wire or faulty solenoid. Assuming the housings are being activated, the slave piston lash adjustment will be the next thing to check. Don’t be fooled into thinking that going tighter or looser on the adjustment will give more performance – in most cases this simply isn’t the case, and engine or housing damage could result. If the adjustments are
