New caliper assemblies come complete with a set of brake pads. The rotors on the Hummer are mounted next to the differential with a shaft that ties it to the 2:1 geared hubs at each of the wheels. I highly recommend the Kent Moore You may wish to removed the caliper in order to get better access to it so that you can turn the piston, but that also required disconnect the brake line. The rear caliper has a emergency brake cable and help when it's dis-connected. Just got the tool made by Kent Moore Tools for doing the brakes that the dealers are using. If your rotors have to be turned, the shaft, or halfshaft as it is called, has to be dis-connected.
Re-Surfacing the rotors maybe required if your rotors are warped, or have grooves cause by the old pads. Yeah, I cut up my old one to see what made it tick. I knew before too long I would have to change out the brake pads. Hummer Brake Servicing Servicing the Brakes Servicing the brakes on the Hummer is almost the same, just the rotors are in different location. This just made it sooner then I wished.
Always replace pads in sets. Click on photos for larger image. One of my rear calipers locked up on me, I was lucky I caught it just a short time after it happened. How nice it is, not only cheaper then stock pads, but got rid of the awful shakes that I would get. It is tight getting to the top capscrew.
But if you get the whole brake tool, you will find it's a lot easier to do a brake job. By selecting the 2wd position, it disconnects all the power from the front drive shaft. Place the brake pads on the adapter. To remove the caliper, you need to remove the two capscrews that secure the yoke and caliper to the adapter. The dealership replaced them because of this before, but with the stock pads. Pad are not all made the same, some are harder, while others are softer and wear quicker but take less pressure for braking.
The first one took time to figure out how to compress the caliper, what the service manual does not tell you much about, is that must screw the caliper piston down once you have compressed it. . When bleeding the brake line attach a hose line to the bleed vent and make sure all the air is out of the system. Tighten capscrews to 30-40 lb-ft. While doing the brakes on a friends Hummer, I found that he too had two types of brake fluid in his system. The photos below are of the rear caliper, the front caliper is smaller and does not have the emergency brake linkage. Since changing to the Raylog pads, this has never happened again.
Next you may need to bleed the brake lines to make sure no air is in the line if you have dis-connected any of the brake line, you will need to bleed the lines. To bottom out the front caliper, place a caliper compression tool within the caliper and turn the handle until piston is like the picture below. In conjunction with power gains, Fuel Economy is also improved on an average of 10-20% throughout all operational conditions. There are 6 bolts that dis-connect the shaft and brake rotor from the output flange of the differential. Just my luck, my left rear caliper was locked up, the piston would not move at all. Apply lock tight to the the tapped holes of the adapter, and secure yoke and caliper to adapter.
And the rear piston must be turned while being compressed the same time, a bear while under the truck with out the Kent Moore Tool. If you are going to remove the brake line, use a , if not, you can damage the flare nut fitting and you will have to replace it. Cut up Rear Brake Caliper! The shifter acts exactly the same way as it did before, except the transfer case will now have 5 positions instead of 4. For the rear calipers, you will need to turn the piston clockwise as you are looking at the top of the piston , about one or two turns and then compress the piston as far as it will go, the turn the piston again and then compress again, repeat until you are all the way to the bottom. Make sure the caliper is supported to prevent damage to the brake line. I am always available by mail at:. Unless you already have a matching set of pads for both sides, I would not use the ones that came with the new calipers.
If the rear, re-connect the parking brake cable. If they are just glazed, I would just re-surface them using a. The service manual recommend using a , but I recommend a. Replacing the pads for the front and back are almost the same, but let me tell you, the rear is a lot more work. . .
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