Brake Fluid
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Cruiser
Joined: Sep 2005
Posts: 110
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From: Missouri
Brake Fluid
Just recieved my new chrome handlebar controls (Custom Chrome) for my 06 Softail. the kit is for all
H-D's single disk models1996 and up. On the master cylinder it says to use DOT5 only. I know my 06 has DOT4 in it, and that 4 and 5 are not compatiable. My question is, can't I just use 4 in the M/C since its new and no fluid has been it? Just a little confused here.. Thanks for any help..........
H-D's single disk models1996 and up. On the master cylinder it says to use DOT5 only. I know my 06 has DOT4 in it, and that 4 and 5 are not compatiable. My question is, can't I just use 4 in the M/C since its new and no fluid has been it? Just a little confused here.. Thanks for any help..........
Elite HDF Member
Joined: May 2006
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RE: Brake Fulid
Umm, you sure about that? I had a leak on my bike, dot 4, and it (luckily) did not harm a thing. I thought it was dot 3 that harmed the paint?
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Joined: Sep 2006
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RE: Brake Fulid
Pretty sure...Copied from another site:
DOT4
DOT4 brake fluid is the brake fluid suggested for use in late model vehicles.
Disadvantages:
[ul][*]DOT4 fluid eats paint! Small leaks around the master cylinder will eventually dissolve away the paint on your bodywork in the general vicinity of the leak. [*]DOT4 fluid is generally about 50% more expensive than DOT3 fluid. [*]Since DOT4 fluid still absorbs some water, any moisture absorbed by the fluid can encourage corrosion in the brake lines and cylinders. [/ul]
DOT4
DOT4 brake fluid is the brake fluid suggested for use in late model vehicles.
Disadvantages:
[ul][*]DOT4 fluid eats paint! Small leaks around the master cylinder will eventually dissolve away the paint on your bodywork in the general vicinity of the leak. [*]DOT4 fluid is generally about 50% more expensive than DOT3 fluid. [*]Since DOT4 fluid still absorbs some water, any moisture absorbed by the fluid can encourage corrosion in the brake lines and cylinders. [/ul]
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Cruiser
Joined: May 2007
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From:
RE: Brake Fulid
close but no......dot5 is merely a silicone based fluid,and dot3,4 are alcohol based fluids.they will not mix at all.however the seals will not be effected.
moco went back to glycol based fluids (dot4) because of its water absorbing properties,(corrosion reduced in lines)also glycol fluids are more compressible than silicone fluids.dot 3, 4 and 5 ratings indicate their perspective temp. resistance.
moco went back to glycol based fluids (dot4) because of its water absorbing properties,(corrosion reduced in lines)also glycol fluids are more compressible than silicone fluids.dot 3, 4 and 5 ratings indicate their perspective temp. resistance.