I need to replace the front rotors and pads, right now I'm assuming they are ATE, haven't had a chance to look yet. This is also a good time to replace the brake lines, re-pack the bearings, and rebuild brake pistons if needed. How do I tell if the pistons are seized, do I watch them while someone pushes the brake pedal or do I have to take them off and look at them? Anything else I should do at this time?

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1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k

Replace the brakefluid while you are at it

You'll know if the pistons are seized when you try to push them back into the caliper to install the new pads. You should be able to use a screwdriver between the old pad and the rotor to lever the pistons back into the caliper. You can do this one pad at a time before you remove the caliper from around the rotor. If you remove the caliper first you run the risk of one piston pushing out too far as you push the other piston in -- especially if the hose is still connected to the caliper and the brake line and the bleeder is closed.

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Tom Savage
Vienna, WV
1984 300D Euro
1995 S320