Adding a Jake brake

Topic: Adding a Jake brake (Read 3388 times) previous topic - next topic

Adding a Jake brake

June 18, 2020, 10:36:40 am

Yesterday I went out an bought a used Jake brake which I removed. I will get a rebuild kit for it before I install it.

Re: Adding a Jake brake

Reply #1 – June 18, 2020, 10:42:16 am

Be sure to post the installation and other parts needed to do the job. I might be interested in adding one also.

Re: Adding a Jake brake

Reply #2 – June 18, 2020, 11:50:46 am

Is the retarder not enough? Just wondering

Re: Adding a Jake brake

Reply #3 – June 18, 2020, 12:53:11 pm

If you travel a lot of steep grades all the time, the Jake could take off some of the tranny heat. My retarder does work great, but I have to keep the coach geared down and rpm up to keep the transmission cool. My '96 Monaco with the 2 stage Jake did the same grades one gear higher and no trans temp issues.

Re: Adding a Jake brake

Reply #4 – June 18, 2020, 01:00:51 pm

Quote from: dans96u295ft – June 18, 2020, 11:50:46 am

Is the retarder not enough?

I'm not answering for OldGuy, but from reading his prior posts, I suspect he has several good logical reasons for wanting to add a Jake.

The "value" of different aux braking devices has been discussed here in the past. They all help - some more than others.

I thought the thread linked below contained some informative and enlightening posts.

Jake Brake vs PAC Brake vs Retarder?

Re: Adding a Jake brake

Reply #5 – June 18, 2020, 04:17:57 pm

When driving last winter the retarder was awesome but those same hills I went roaring down, in the summer I would over heat.
I really like the idea of having both. Putting in a Jake brake was always in my plan if I got a Foretavel. Craneman, hopefully I won't
need to much stuff. I know I will need a floor switch as I like to be in control. I don't want it working off my throttle.

Re: Adding a Jake brake

Reply #6 – June 18, 2020, 04:31:31 pm

Quote from: oldguy – June 18, 2020, 04:17:57 pm

When driving last winter the retarder was awesome but those same hills I went roaring down, in the summer I would over heat.
I really like the idea of having both. Putting in a Jake brake was always in my plan if I got a Foretavel. Craneman, hopefully I won't
need to much stuff. I know I will need a floor switch as I like to be in control. I don't want it working off my throttle.

That's how my Monaco was set up jake pedal left of the steering column.

Re: Adding a Jake brake

Reply #7 – June 18, 2020, 05:44:19 pm

Quote from: oldguy – June 18, 2020, 04:17:57 pm

When driving last winter the retarder was awesome but those same hills I went roaring down, in the summer I would over heat.
I really like the idea of having both. Putting in a Jake brake was always in my plan if I got a Foretavel. Craneman, hopefully I won't
need to much stuff. I know I will need a floor switch as I like to be in control. I don't want it working off my throttle.

You could put in a floor switch but ours comes on whenever you lift the throttle. I didn't even notice it from the first time we had it switched on and let off on the throttle. At low rpm, you don't feel any effect. It's only at higher rpm that it comes into it's own. It's a very subtle thing. As you know I hate automatic transmissions and don't even like the HWH but the Jake is outstanding. Or I would not leave it switched on all the time.

Unless you have the window open and next to a wall or in a tunnel, you can't hear any extra noise. When in a tunnel, I always leave the window open so I can listen to the Detroit exhaust with the Jake the frosting on the cake.

Foretravel also put it on the CAT in the 1995 U300.

Pierce

Re: Adding a Jake brake

Reply #8 – June 18, 2020, 07:23:34 pm

When it comes to stopping more is always better. Look forward to its completion. Every heavy duty truck uses them. To me that means there cheap and work well. This has always been a back burner Idea. Really looking to see more.
Three types of People in the world.
People who make thinks happen
People Who watch things happen
People who wonder what happened
Scott

Re: Adding a Jake brake

Reply #9 – June 18, 2020, 07:53:55 pm

Not saying more is not better but there is initial cost, maintenance, long grade, hot weather stopping power and possible owner mismanagement on slippery roads. Pros and Cons can be argued forever but remember, the service brakes are the primary method of slowing the vehicle. Best retarder, Jake or PAC brake won't make up for a poor operator technique.

Pierce

Re: Adding a Jake brake

Reply #10 – June 18, 2020, 08:20:09 pm

Oldguy what exhaust does your coach have?

Re: Adding a Jake brake

Reply #11 – June 18, 2020, 11:25:50 pm

I have the stock exhaust, but I would still want one if I have a resonator. I don't plan on using it in towns, I have a retarder for town.
I had a foot switch for the exhaust brake in my last coach and I really like it. Going down hills to hold my speed I don't want to use my brakes. I use the brakes for stopping. In my old coach the steepest I drove was 17 percent and in low gear with the exhaust brake
it held so I didn't have to use the brakes.

Re: Adding a Jake brake

Reply #12 – June 19, 2020, 07:22:13 pm

Had a Custom build KW T300 set up as an RV tow 15 years ago biggest cat I could order through a 9 speed manual tranny with a jake brake.
The jake brake is so much better for long downhills, keep your foot off the brake, change down gears and the jake will be noisy and keep your speed down.
The retarder is nice when a little slowing is needed, it raises the transmission temp very quickly rendering it useless, I like the retarder but it's not substitute for a jake brake in mountain driving.
We all have different driving styles, every one to his own,

Re: Adding a Jake brake

Reply #13 – June 19, 2020, 07:55:55 pm

The m11 engine downshifted helps the retarder somewhat more in keeping the trans temps down in the hills. Also not being unnecessarily concerned about mid 230's on the VPMS trans temp gauge for short stretches while in use.

The Meritor disk brakes are cold blooded if not recently used and warmed up.

So if you need a panic stop the retarder is a much quicker stopping force.

I rebuilt the Meritors back to new condition which greatly helped my confidence in their heat absorption abilities after testing.

I do not use brakes on my towed so that factors in. I should be so far no issues.

Without the 3,600 pound tow the retarder and service brakes easily handle my normal hills.

Re: Adding a Jake brake

Reply #14 – June 19, 2020, 08:49:17 pm

Bob
When you say bring them back to new, what does that involve? Is it cleaning or new parts?
My brakes are good, but brakes can always be better!
David

Re: Adding a Jake brake

Reply #15 – June 20, 2020, 12:08:29 am

New pads. New pins. New rotors. Added retraction pins. Correct grease bled off correctly.

Big time smoke first hard ride. Seat the pads. Smells. Bedded in, much better action and capacity in my experience.

Like new when I drove these back then

Re: Adding a Jake brake

Reply #16 – June 20, 2020, 08:35:25 am

I assume "Added retraction pins" is the auxiliary springs that aid on retraction.

Re: Adding a Jake brake

Reply #17 – June 20, 2020, 10:58:48 am

Yes

Re: Adding a Jake brake

Reply #18 – June 20, 2020, 12:18:37 pm

I have seen some mention of exhaust valve springs and jake brakes.

Re: Adding a Jake brake

Reply #19 – June 20, 2020, 02:38:30 pm

Quote from: Protech Racing link=msg=393111 date=1592669E917

I have seen some mention of exhaust valve springs and jake brakes.

Exhaust brakes (PacBrake) on Dodge PUs. Quote: Keep your rpm under 3500 and you won't have to worry about floating a valve with stock valve springs. Above 3500rpm and or use of an exhaust brake= the need for 60lb valve springs. Exhaust brake - just exhaust side. 3500rpm and above, both intake and exhaust sides.

Pierce

Re: Adding a Jake brake

Reply #20 – June 20, 2020, 09:21:01 pm

Today I got the valve crossheads change, the injector adjusting screws changed and the valves adjusted. They were all too tight.
Then I finish off installing the jake spacer.

Re: Adding a Jake brake

Reply #21 – June 20, 2020, 09:29:02 pm

Quote from: oldguy – June 20, 2020, 09:21:01 pm

the valves adjusted. They were all too tight.

That is a common thing on the engine after 50 or 60K and needs to be checked on a lot of coaches. Sounds like you are progressing nicely and should be finished pretty quick with what you have gotten done up to this point.

Mike

Re: Adding a Jake brake

Reply #22 – June 21, 2020, 08:24:46 pm

Finished the mechanical side of installing the Jake. Now comes the wiring which will take quite a bit
of figgering out. One thing I need to know is my engine M11 celect or M11 plus celect. I will want
to operate from a foot peddle. I don't mind if it would work on cruise automatically, but out of cruise
I need to be in control. Then I will have to take it to Cummins to program the computor.

Re: Adding a Jake brake

Reply #23 – June 21, 2020, 09:08:10 pm

Call Cummins with your engine SN: Cummins 800-286-6467

Re: Adding a Jake brake

Reply #24 – June 21, 2020, 10:27:00 pm

Quote from: oldguy – June 21, 2020, 08:24:46 pm

Finished the mechanical side of installing the Jake. Now comes the wiring which will take quite a bit
of figgering out. One thing I need to know is my engine M11 celect or M11 plus celect. I will want
to operate from a foot peddle. I don't mind if it would work on cruise automatically, but out of cruise
I need to be in control. Then I will have to take it to Cummins to program the computor.

A '99 is an ISM.
Celect plus ended in 1997

Cummins M-series engine - Wikipedia

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