|
02-17-2018, 12:31 PM
|
#1
|
Senior Member
Monaco Owners Club
Join Date: Oct 2014
Location: Rigby, Idaho
Posts: 3,948
|
Is the PAC brake valve supposed to move.
With the engine off and cold, can anyone move their pac brake valve by hand? Mine does not move, and the braking from it is not impressive, especially considering the Jake compression release brake from my long past life. I'm thinking my valve is stuck and all I'm getting is downshift braking. What do you wise folks think?
__________________
Cheers,
TonyMac
2006 Monaco Safari Cheetah 40PMT
|
|
|
|
Join the #1 RV Forum Today - It's Totally Free!
iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!
You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!
|
02-17-2018, 02:01 PM
|
#2
|
Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: Mar 2010
Posts: 215
|
You should be able to move it against the spring with a screwdriver or pliers. Just checked mine and lubed it today.
__________________
'02 Tiffin Phaeton 330 CAT
'02 Chevrolet Tracker Toad
|
|
|
02-17-2018, 02:19 PM
|
#3
|
Senior Member
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 9,941
|
I think I've tried to move mine too while doing other maintenance in the area and, could not move it. But, it's always worked flawlessly each and every time I've needed it. I do keep it lubed on a quite often basis. I've even tried to loosen the air fitting on the back side of the piston so inject my home compressed air to the movement and, I can't break the fitting loose. I'll have to try again sometime. But, to answer your question, I've no experience in actually moving it when parked.
Scott
__________________
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '20 Honda NC750X DCT
2018 Goldwing Tour DCT Airbag
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Heidi character, (mini Schnauzer)!
|
|
|
02-17-2018, 10:29 PM
|
#4
|
Senior Member
Forest River Owners Club
Join Date: Apr 2014
Posts: 246
|
Mine was stuck open when I bought my truck, some advice from a member of the Freightliner RV haulers group told me to disconnect the air ram cylinder and you should be able to move it by hand, if not spray some lube on the shaft and get some plyers to move it back and forth, he also said to leave it on all the time so it gets used or it may get stuck again, there is a special lube to use on the shaft, I find keeping it on and moving and a spray of WD-40 works well
__________________
2007 Forest River fifth wheel toy hauler 385 RLTS, 1999 Freightliner FL-60 with Western Hauler bed, new 3126B CAT motor, new Allison MD3060 transmission, air ride rear suspension, air ride cab, air ride seats
|
|
|
02-17-2018, 11:17 PM
|
#5
|
Senior Member
Monaco Owners Club
Join Date: Oct 2014
Location: Rigby, Idaho
Posts: 3,948
|
Yep, got the special lube, and have applied it per directions several times per year. I use the brake often, but don't leave it on because, as I remember, that results in too much downshifting for my liking.
__________________
Cheers,
TonyMac
2006 Monaco Safari Cheetah 40PMT
|
|
|
02-18-2018, 06:06 AM
|
#6
|
Senior Member
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 8,889
|
I can't move mine by hand, but I can move it using a pair of Vice Grips.
Here is a link to Exhaust Brake Maintenance Tips. Note all of the places they recommend using their oil:
https://pacbrake.com/wp-content/uplo...7/08/L5046.pdf
__________________
Good Luck, Be Safe and Above All, Don't Forget To Have Fun
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
|
|
|
02-18-2018, 02:51 PM
|
#7
|
Senior Member
Join Date: May 2010
Location: N.E. Florida
Posts: 1,399
|
It should move very easily by hand with the cylinder disconnected.
__________________
DaveS
1998 American Eagle 40EVS
|
|
|
04-03-2018, 08:47 AM
|
#8
|
Member
Newmar Owners Club
Join Date: Mar 2008
Posts: 66
|
PAC Brake test Switch
I added a switch allowing me to test and exercise the brake.. sorry about the audio.. but diesels are noisy..
https://www.facebook.com/doug.bywate...3906877900483/
__________________
Doug Bywaters, Flint Hill, VA
2003 DSDP 4005 Freightliner chassis
|
|
|
04-11-2018, 10:47 PM
|
#9
|
Senior Member
Georgie Boy Owners Club
Join Date: Dec 2012
Posts: 127
|
Pac-brake
If you disconnect the air hose to the pac-brake then you should be able to overcome the spring pressure and move the shaft from open to closed. If it will not move with moderate effort then use some rust buster on the shaft where it goes through the cast iron housing. Not wd40 it will burn and gum up from the heat. Treat both the top end of the shaft and the bottom end This is the most likely place for it to seize. If this does not work then take it out and do some bench work on it.
|
|
|
04-12-2018, 06:48 AM
|
#10
|
Senior Member
Monaco Owners Club
Join Date: Oct 2014
Location: Rigby, Idaho
Posts: 3,948
|
I disconnected the air line, and was able to move the valve by prying with a big screwdriver. The spring is really strong, and pulls it back to open with a serious amount of force -- a lot more than I expected. But there is no binding, it is a smooth and very forceful operation. It will not move with the force of a bare human hand, the spring is too strong. I put a several drops of Pac Brake Lube in the cylinder while I had it open.
__________________
Cheers,
TonyMac
2006 Monaco Safari Cheetah 40PMT
|
|
|
04-12-2018, 07:20 AM
|
#11
|
Senior Member
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 8,889
|
Yes the spring tension....or is it spring compression(?) is strong.
Here is a web link to PacBrake maintenance instructions:
Maintenance | Pacbrake
__________________
Good Luck, Be Safe and Above All, Don't Forget To Have Fun
Pete
Central Kentucky
2006 Fleetwood Discovery 35H, 2014 Honda CR-V, M&G Engineering Braking System
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|