We are now on Part 4 of our brake hose service ideas and if you missed part 1, part 2, or part 3, here is a quick recap:
- How to tell if a brake hose is still able to continue in service or not
- What cracks mean on a brake hose and if it is serviceable when cracked
- Is the pull on the vehicle from the brakes or from the brake hoses?
- What to do with a caliper when servicing the vehicle
- What heat does to brake hoses
- Comparison of a crimped hose
- Petroleum saturation and what happens with that
- What happens when the wrong brake hose is put on a vehicle
- Using a valve stem to plug a hole in a caliper
- What to do when “pinching off” a hose
Another design of a hand tightened line lock. This unit is simply smaller in design.
This is NOT a proper tool to pinch off a flexible brake hose. This type of tool should never be used and even if you put padding such as a piece of hose over the tools jaw area this tool may easily damage a hose.
If a hose is pinched off as shown so no fluid and flow through its small internal passage area with a tool as shown damage usually occurs.
Note the internal damage from using clamping pliers such as that shown in Pic. 19. This hose will no longer allow the same volume of fluid to flow as the hose on the opposite side of the vehicle. This may give a pull upon initial brake application among other problems.
This hose has an internal “flapper valve” type of issue. Brake fluid will flow through the “flapper” but will not easily flow back the other way. This may prevent fluid application or hold fluid onto the caliper depending on the direction of flow in relationship to the “flapper” direction. Was this problem initiated by someone once improperly clamping a flexible brake hose? You don’t really know but it could easily be the cause of the problem.
Brake hoses are really not complicated items but a large dose of common sense and understanding must be applied to brake service situations and problems when the brake hose may be the cause of the problem. It is also commonly recommended to replace brake hoses is pairs as if one hose has a service problem the other, unless it was changed individually, may soon follow as its service life has been the same. Pay attention to the tips and recommendations in the previous images and be successful in your brake hose service.
What do you suggests for stopping returned fluid if they have stainless brake hoses? Can you still clamp off the braided lines with out damage?
I assume you mean a braided flexible brake hose used instead of a rubber type of flexible brake hose. The braided type of hoses have a more rigid internal liner and should not be nor can they really be clamped off. What I would suggest is completely opening or actually removing the bleeder and then pushing the piston in very slowly in a completely controlled manner. This doesn’t mean using a large slip jab pliers or perhaps (depending on the size and type of C-clamp) squeezing it in with a large C-clamp. These two items are just too uncontrollable in how fast they move the piston inward.
There are some tools in the market place that do a good job of pushing the piston back into the bore in a controllable manner. In fact, at the past SEMA/AAIW show I saw a new tool that was the best of anything I have ever seen over the years. I don’t presently own one but ………….
Another way to do this job would be to remove the fixed line on the vehicle from the hose, plug off the fixed rigid line (there are also some new tools out to plug off these lines when disconnected) and allow the fluid to flow out of the end of the flexible line when the piston is pushed back in.