Hydroboost Replacement

[Im_Strokin_ur_Cummins]

Ok so finally got around to replacing my hydroboost this past weekend i took some pictures to help you guys along that have to do it later on or need to do it but not sure how to yet.
Total time to do it 1 hour

So first Remove your airfilter and intake hoses to access everything easier.



Next you will have to unhook the Pressure lines and return line. The pressure lines screw in while the return line has a clip.




Ok so once you have those unhooked you can access the 13mm bolts to pull off the brake fluid resivore.


Ok so now the next part is pain in the butt part. You need to go back up under your dash where the PCM unit is and remove the brake light switch from the pedal and disconect the pedal from the hydroboost unit. There is a small yellow clip you have to remove.


Next after that is disconected you have to take off those 4 bolts that attach the boost unit to your firewall. The two closest to the fuel pedal are easy to take off. The other side take a little patience and maybe an arm cramp lol. All you have to do is gently move the wires to the side to get the socket on the nuts.


So once you have pulled those you can pull the unit out of the firewall.



Ok so here is the reman hydroboost compared to the one i pulled.


You will have to pull the master cylinder operating rod used in the original boost unit unless yours came brand new with one. If not use an o-ring pick to pull out. The one we got never came with the rubber boot to cover the rod to the pedal so becarful not to rip it when you take it off the orginal.





So now with that done you just slide the unit back into the fire wall, go back around and put the bolts back on under the dash. Reconect the brake pedal and the light switch. Go back up front and reattach the brake fluid resivor to the unit. Then reconect the pressure and return lines you unhooked earlier.


Replace your intake hoses and filter.


With that all you have to do is bleed your powerstrearing. For that start your truck, turn wheels all the way to one side then back to the other try not to hold agianst the wall at either end. Bring back to center turn off truck and pump brakes 4-5 times.Then check your fluid level add if needed if not your done!!
Hope this Helps guys

[DrewGerhan]

Always wondered, whats the blue thing attached to the original? (its black on replacement one)

[Im_Strokin_ur_Cummins]

Yea it was painted on the new one. I belive it is an accumulator

[Buffalo444]

Nice write up I would have done one when i did mine, but I'm impatient. lol

[jshalala]

Great job. Thanks for the pics. gonna do mine pretty soon. How did you know yours needed replaced and where did you get it from?

Sent from my DROID X2 using AutoGuide App

[Im_Strokin_ur_Cummins]

Originally Posted by jshalala

Great job. Thanks for the pics. gonna do mine pretty soon. How did you know yours needed replaced and where did you get it from?

Sent from my DROID X2 using AutoGuide App

I had my brake pedal stick a little then click and the truck would run smoother and easier then sometimes it would vibrate for 4-5 seconds stop for 2-3 then do it agian till the pedal popped or something i posted on here about it and asked my dad both said hydroboost unit. I got it from Fisher Auto Parts

[ToMang07]

Nice Write-up! Good Job!