DOT 4 to DOT 5 Brake Fluid - Road Glide Forums
Fluids and Lubricants discussion of all fluids and lubricants

 1Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 21 (permalink) Old 07-27-2014, 09:58 PM Thread Starter
Life Member
 
Q-Hog's Avatar
 
Join Date: Jan 2011
Location: Georgia
Posts: 7,280
DOT 4 to DOT 5 Brake Fluid

Can I change out DOT 4 to DOT 5 brake fluid in the front brake line (ABS) by just bleeding it out and add the new fluid? I have manually bled my brakes (ABS) the conventional way after adding new brake lines and calipers before without any issue but I never did a complete swap out. I'm thinking it should be the same as bleeding it. Any advice? Thx


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
To the GREAT white North! and Join us for SharkWeekVI Eh!
August 2-3-4 2016 - For registration information click
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Q-Hog is offline  
Sponsored Links
Advertisement
 
post #2 of 21 (permalink) Old 07-28-2014, 06:12 AM
Life Member
 
Ohiobellboy's Avatar
 
Join Date: Nov 2012
Location: Canton, oHIo
Posts: 4,822
Just curious why you're going to DOT 5 in the lines?

A.K.A OBB
Check out the Ohio Glide Riders community page:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Ohiobellboy is offline  
post #3 of 21 (permalink) Old 07-28-2014, 07:46 AM
Grey beard
 
FrankieB's Avatar
 
Join Date: May 2011
Location: Kentucky
Posts: 809
I wouldn't switch it to DOT 5, it is a PIA to bleed all the air out. It also absorbs moisture like a sponge. Every time you crack a new bottle open the left over should be trashed.

06 RK
11 RGU
FrankieB is offline  
 
post #4 of 21 (permalink) Old 07-28-2014, 09:11 AM
Newbie
 
Join Date: Apr 2014
Location: Fort Mill, SC
Posts: 32
I switched a couple of classic cars I once owned from Dot 3-4 to Dot 5 about 10 years ago. The main advantages for doing this was that the fluid was paint friendly and hydrophobic so there was less internal system corrosion. I know FrankieB says it draws water but I swear it's the Dot 3 or 4 that is hydroscopic and has that issue otherwise there would be very little advantage to using it.

The down side was I was never able to get the brake pedal as stiff as it was with Dot 3 or 4 no matter how many times I tried to bleed the brakes. Dot 5 also likes to keep tiny bubbles in it so you have to be really careful to not overly agitate the bottle while adding it to your system. This may be extreme but I would allow the fluid to sit in the master cylinder over night after I filled them to allow the bubbles to come out before bleeding. That would turn bleeding the brakes into a multi day affair.

One other issue that was claimed at the time was that you should only convert to Dot 5 when switching out every bit of rubber in the system. That meant new hoses and new or rebuilt calipers and master cylinder. I have no idea if this is still the thinking but that's what I did on each car.

Jeff
Jeff396 is offline  
post #5 of 21 (permalink) Old 07-28-2014, 11:13 AM Thread Starter
Life Member
 
Q-Hog's Avatar
 
Join Date: Jan 2011
Location: Georgia
Posts: 7,280
Thx guys. I put on a new brake line from the brake caliper to the abs box and a new PM 6 piston caliper. It didn't come with instructions regarding what type of DOT fluid to use, I later found out it required DOT 5 fluid. And I currently have DOT 3-4 fluid in it.

Sent from Motorcycle.com Free App


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
To the GREAT white North! and Join us for SharkWeekVI Eh!
August 2-3-4 2016 - For registration information click
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by Q-Hog; 07-28-2014 at 11:33 AM.
Q-Hog is offline  
post #6 of 21 (permalink) Old 07-28-2014, 01:30 PM
tmd
Grey beard
 
Join Date: Oct 2010
Location: San Angelo, TX
Posts: 1,477
DOT 3/4 absorb moisture. DOT 5 is silicon based and does not absorb moisture. On a side note DO NOT USE DOT5 if you have ABS. Supposedly it has to do with the boiling point. HD went from 5 to 4 when they offered ABS on their bikes.
Hematite likes this.

2011 RGU with more money then sence in it.
Oh and its black because blacks faster.
tmd is offline  
post #7 of 21 (permalink) Old 07-28-2014, 02:11 PM Thread Starter
Life Member
 
Q-Hog's Avatar
 
Join Date: Jan 2011
Location: Georgia
Posts: 7,280
I'm glad you told me that. Thx..


Sent from Motorcycle.com Free App


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
To the GREAT white North! and Join us for SharkWeekVI Eh!
August 2-3-4 2016 - For registration information click
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Q-Hog is offline  
post #8 of 21 (permalink) Old 07-28-2014, 06:46 PM
tmd
Grey beard
 
Join Date: Oct 2010
Location: San Angelo, TX
Posts: 1,477
One other note about this. I don't remember if its going form 5 to 4 or 4 to 5 but the piston seals in one is different and the change will cause them to swell and lock your breaks.

2011 RGU with more money then sence in it.
Oh and its black because blacks faster.
tmd is offline  
post #9 of 21 (permalink) Old 07-28-2014, 07:04 PM Thread Starter
Life Member
 
Q-Hog's Avatar
 
Join Date: Jan 2011
Location: Georgia
Posts: 7,280
DOT 4 to DOT 5 Brake Fluid

Due to the ABS, I'm just going to go with DOT 4.

I'm surprised that There's not more comments on this topic since I see a lot of 6 piston calipers mounted on these RGs pics on the forum.


Sent from Motorcycle.com Free App


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
To the GREAT white North! and Join us for SharkWeekVI Eh!
August 2-3-4 2016 - For registration information click
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Q-Hog is offline  
post #10 of 21 (permalink) Old 07-28-2014, 07:59 PM
Life Member
 
Ohiobellboy's Avatar
 
Join Date: Nov 2012
Location: Canton, oHIo
Posts: 4,822
Quote:
Originally Posted by Q-Hog View Post
Due to the ABS, I'm just going to go with DOT 4.

I'm surprised that There's not more comments on this topic since I see a lot of 6 piston calipers mounted on these RGs pics on the forum.


Sent from Motorcycle.com Free App
Maybe they don't have the ABS on theirs. Dunno

A.K.A OBB
Check out the Ohio Glide Riders community page:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by Ohiobellboy; 07-28-2014 at 09:26 PM.
Ohiobellboy is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Road Glide Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
leaking brake fluid THEMASTERDESTROYER Fluids and Lubricants 16 04-11-2014 10:05 PM
Brake Fluid Leak lldsilver41 Tech Area 2 09-10-2012 03:28 PM
How often do you flush your brake fluid? jcanrun *General Road Glide Discussions/Pictures 12 05-08-2011 02:28 PM
head trip dot/non dot BAGDRAGGER Helmets 11 02-21-2011 05:07 PM
To DOT or not to DOT (give me a better option) 1BigGuy Helmets 19 10-10-2010 08:15 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome