First draft of the first part.. comments welcome.
Freelander brake pipe renewel - How I do it.
This is aimed at anyone who is looking to replace one or more of their brakelines. This is normally considered for MOT test reasons and to save money. I've tried to give information that will be of use to those who have little or no experience working on vehicle braking systems. Older and/or more experienced hands will probably be very familiar with all or most of this.
This is written after direct experience changing/overhauling everything on my V6 (after the ABS pump). For any non-LR readers, my 2001 Freelander V6 has front disks and rear brake drums. The braking system consists of a split hydraulic system (essentially two separate systems. The front offside caliper is on the same circuit as the rear nearside brake cylinder, similarly the front nearside caliper is on the same circuit as the rear offside cylinder.).
Brake pedal force is transferred to the ABS pump from the brake master cylinder/servo. From there, hydraulic force is applied to both brake circuits.
Overview: I'm happy using copper tubing to replace any part of a vehicle braking system. I have never had any problem with it - ever. I would suggest that anyone, who follows a few simple rules, will also have no problems.
Copper/nickel pipework is also available. This costs a little more than copper pipes do and is stronger. It is however slightly harder to work with and requires the use of a better quality flaring tool (for this, read as more expensive). Pro/semi-pro flairing tools are a joy to use and I would recommend the use of them if available. Most of them can also handle steel pipes if so required.
My rationale in using copper and the tools covered here are these:-
Copper is more than strong enough to withstand the hydraulic pressures that exist in modern braking systems.
I'm skint.
I've used copper several times before, with total success.
A properly installed copper system will outlast the life of the vehicle.
The flaring tool used here is perfectly adequate if used with care.
I've written this guide from the point of view having purchased rolls of copper brake pipe. It is also possible to purchase ready made lengths of copper lines.. Some motor factors will make up lengths to order.
What you'll need:-
2 rolls of copper pipe: (2 off 3/16" copper x 25')
Pipe flaring tool. See below.
Tape measure and a length of flex (or similar). Used to determine pipe lengths.
Brake pipe nuts: (10mm and 12mm) [10 off 10mm x 1mm, shouldered. 2 off 12mm x 1mm shouldered.]
Pipe cutter. I recommend the type shown here (see photo).
Pipe bending tool: Cheap and easily available. Usage covered below.
Two lengths of mdf or similar. Approx. 1 metre or so by 10cm wide. See photo. This is used to assist when unrolling the brake pipe. Ensure that one piece has a clean straight cut, smooth long edge. See photo.
Marking pen: Something like a Sharpie or a CD pen is fine. Used for marking the brake pipe.
Deburring tool. Proper deburring tools are available. I've always just used a 10mm flat bit.
Brake fluid. (never reuse the old stuff..)
Brake pipe spanners. These look like ring spanners, with a slot cut in the end. I have them, but have never needed to use them on new brake nuts. An open ended spanner is normally sufficient.
Brake bleeding equipment: I recommend a Gunson Easybleed (Eezibleed) [£15-£20]. One of the supplied pressure caps fits the Freelander fluid reservoir. This setup makes brake bleeding a simple one person job.
Spring hook puller: Useful for the rear brake lining springs, also in assisting pulling one of the brakepipes into its relevant clips. See later.
A motorbike spring hook puller (£3.50 on Ebay) is fine.
You **may** also need the following:-
Brake hose clamp: This is not required if changing all of the lines or just performing a full fluid change.
2 off rear brake cylinders: Look at the fixings on the existing brake backplate and how they relate to the position of the brake pipe. This will allow for easy visual identification of the type required. See below for a bleed nipple suggestion.
4 off M6 x 10mm stainless steel screws (Screws are threaded all of the way to the head, bolts are not.).
4 off 10mm stainless steel washers: Rear brake cylinder fixings.
1 off front caliper overhaul kit. If you decide to do this, get the kit that contains the slide pin rubbers. You may as well change them if overhauling the calipers. Don't just overhaul one caliper... do both!
4 off 10mm (15mm O.D.) copper sealing washers [For the front caliper flexible hose union]
2 off Front caliper bleed nipple.
2 off Front flexible brake hose. See below for discussion.
2 off Rear flexible brake hose. See below for discussion.
6 off Brake hose clips. You can probably reuse the existing ones.
Now might be the time to consider overhauling the brakes.. There is a good chance that the rear bleed nipples are seized solid.. if they are, then the rear brakenuts won't be far behind them.
Whatever you decide to do with the old brake cylinders, I recommend replacing the bleed nipples (even if new) with longer ones. This helps with access when bleeding the brakes.
more coming..
Bodge99