Brake Bleed
Seasoned HDF Member
Joined: Sep 2008
Posts: 14,075
Likes: 11,096
From: San Diego, CA
If it is labelled DOT 4, it's glycol-based, and will blend/mix with any other glycol-based brake fluid.
HD's new brake fluid is most likely nothing "new" .... probably just some slight tweaks to the formula, to affect the boiling point..
Not sure how much they can really affect the moisture part of the equation, glycol-based fluid will absorb moisture...
Seasoned HDF Member
Joined: Jun 2006
Posts: 28,476
Likes: 3,950
From: Vermont
Shoot for Wednesday......saying 68* in my neck of the woods so your temps must be getting right up in the same range.
Road Master
Joined: Sep 2014
Posts: 762
Likes: 435
From: NE Oklahoma
+ one on the Mighy-Vac if you can grab one. Its a great way to actually pull out the old fluid and ensure youve got actual fresh fluid.
Back some time ago when folks had to maintain their vehicles it was pretty much an event done every two to three years with the old drum brakes. We moved away from that interval because of more effective disc brakes. Subsequently weve gotten lazy with our routine maintenance.
Ask someone under 30 if they know what brake fluid is in their ride and stand back and be amazed.
Back some time ago when folks had to maintain their vehicles it was pretty much an event done every two to three years with the old drum brakes. We moved away from that interval because of more effective disc brakes. Subsequently weve gotten lazy with our routine maintenance.
Ask someone under 30 if they know what brake fluid is in their ride and stand back and be amazed.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Extreme HDF Member
Joined: Jun 2011
Posts: 14,731
Likes: 2,535
From: Mountain Top, Alabama
No problem with the mix of DOT 4's, but this will keep it at a minimum:
Using a cheap turkey baster, remove all brake fluid from the reservoir, refill with the new type fluid. THEN Mity vac fluid down and out the bleeders, keep filling the master with the new type fluid as to not run out of fluid. When new fluid is all thru the system, proceed to the other and repeat. Same way with speed bleeders.
I always start my bleeding procedure this way, it is more effective in less time.
Otherwise, many folks just move old fluid down the line, and put new fluid in the reservoir.
Think about it...
Using a cheap turkey baster, remove all brake fluid from the reservoir, refill with the new type fluid. THEN Mity vac fluid down and out the bleeders, keep filling the master with the new type fluid as to not run out of fluid. When new fluid is all thru the system, proceed to the other and repeat. Same way with speed bleeders.
I always start my bleeding procedure this way, it is more effective in less time.
Otherwise, many folks just move old fluid down the line, and put new fluid in the reservoir.
Think about it...
Thread Starter
|
Supporter
Joined: Mar 2008
Posts: 4,419
Likes: 89
From: Vermont
should be in low 50's on Wednesday Dawg but 30's again Thursday. It coming...Sun feels more intense every day even when its 20. Its coming for sure