Question about 1994 Oldsmobile Cutlass Ciera

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Reinstall anti-lock motor on Master Cylinder

How do I align gears on anti-lock motor for Master Cylinder and the procedure to bleed brakes on anti-lock system?

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  • segrist Jan 17, 2009

    Just need to know how to align gears and bleed ABS system. Thank you.

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Remove the old master cylinder Reinstall anti-lock motor on Master Cylinder - clip_image001.gif before youbench bleed the new one. It sits prominently on the driver's side of the enginecompartment to the right of the engine. You can clean and reuse the oldreservoir or get a new one (some master cylinders come with one).-------Set thenew car master cylinder in a vise on your work bench or table. Clamp it intoplace, ensuring that it's level; this helps make sure air pockets don't formduring the process. Remove the supplies that came inyour bleeder kit and setthem out, so you can inventory what you have.------3-Install the reservoir onto the replacement cylinder, ifit's not already done. Find the two fittings that came with your kit and screwthem into the outlets on the side of the cylinder. Insert the two lengths ofplastic tubing from the kit into the fittings, then bend them up so they aiminto the brake fluid clip_image001.gif reservoir.--4---Cut the hoses so they stick halfway downinto the reservoir. Clip the two tubes to the lip of the reservoir to keep themin place, so you don't end up allowing air into the system or spraying brakefluid everywhere.------Fill the Car reservoir with fresh brake fluid. Putenough fluid into the reservoir to fill it just short of the maximum fill line.The hoses should extend down into the fluid to make a temporary hydraulic 
.----6Pump the piston on the master cylinder to pushthe brake fluid through it and into the hoses. Do this by inserting the screwdriverinto the cylinder and pushing it against the piston to start pumping the fluid.The fluid will recycle back into the reservoir, but that's okay since you usedfresh fluid.--7--Watch for the airbubbles coming out of the hoses and into the brake fluid in the reservoir. Keeppumping until all the air is out of the cylinder and bubbles no longer appear.If the hoses that came with your kit are black, you might want to buy clear onesto help you see the bubbles better.---8----Keep the hoses in the reservoir and remove thecylinder from the vise. Now you can install the primed master cylinder intoyour Car.
 


Posted on Jan 17, 2009

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You can just override the abs by disconnecting the system. Then you will just have a regular braking system where you have to pump your brakes when necessary.

Posted on Jan 17, 2009

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1990 jeep wrangler bleeding breaks


Hi there:
I suggest to check this procedure, when the hydraulic brake system must be bled whenever a fluid line has been disconnected because air gets into the system.

A leak in the system may sometimes be indicated by a spongy brake pedal. Air trapped in the system is compressible and does not permit the pressure applied to the brake pedal to be transmitted solidly through the brakes. The system must be absolutely free from air at all times. If the master cylinder has been overhauled or a new cylinder has been installed, bleed the cylinder on a bench before installation. When bleeding brakes, bleed at the wheel most distant from the master cylinder first, the next most distant second, and so on. During the bleeding operation the master cylinder must be kept at least 3 / 4 full of brake fluid.


The ABS bleeding procedure is different from the conventional method. It consists of the following three steps:
Step 1: Conventional manual brake bleed.
Step 2: Bleeding the system using the DRB scan tool.
Step 3: An additional conventional manual brake bleed.

The recommended ABS bleeding procedure is as follows:
  1. To bleed the brakes, first carefully clean all dirt from around the master cylinder filler cap. Remove the filler cap and fill the master cylinder with DOT 3 brake fluid to the lower edge of the filler neck.
  2. Bleed the master cylinder first. Have a helper operate the brake pedal while bleeding each master cylinder fluid outlet line. Do not allow the master cylinder to to run out of fluid,as this will allow additional air to be drawn into the cylinder.
  3. Bleed the brake system in the following sequence:
    1. Master cylinder
    2. HCU valve body (at fluid lines)
    3. Right rear wheel
    4. Left rear wheel
    5. Right front wheel
    6. Left front wheel
  4. Clean off the bleeder connections at all four wheel cylinders. Attach the bleeder hose to the right rear wheel cylinder bleeder screw and place the end of the tube in a glass jar, submerged in brake fluid.
  5. Open the bleeder valve 1/2 - 3/4 of a turn.
  6. Have an assistant depress the brake pedal slowly and allow it to return. Continue this pumping action to force any air out of the system. When bubbles cease to appear at the end of the bleeder hose, close the bleeder valve and remove the hose.
  7. Check the level of fluid in the master cylinder reservoir and replenish as necessary.
  8. After the bleeding operation at each wheel cylinder has been completed, fill the master cylinder reservoir and replace the filler plug.

Do not reuse the fluid which has been removed from the lines through the bleeding process because it contains air bubbles and dirt.


  1. Perform the "Bleed Brake'' procedure with the DRB II scan tool. This procedure is described in the DRB II software information and diagnostic guide.
    1. Attach the DRB II scan tool to the diagnostic connector.
    2. Run the Bleed Brake procedure as described in the DRB II tester guide.
  2. Repeat the conventional bleeding procedure as previously outlined.
  3. Fill the master cylinder reservoir to the proper level.
  4. Check the brake operation.


Hope this helps.

Apr 21, 2013 | Jeep Wrangler Cars & Trucks

1 Answer

Need to know procedure for bleeding brakes on1987 gmc s15 2.8 litre 4x4 front disc w/abs


MANUAL BLEEDING

For those of us who are not fortunate enough to have access to a power bleeding tool, the manual brake bleeding procedure will quite adequately remove air from the hydraulic system. The major difference between the pressure and manual bleeding procedures is that the manual method takes more time and will require help from an assistant. One person must depress the brake pedal, while another opens and closes the bleeder screws.

In addition to a length of clear neoprene bleeder hose, bleeder wrenches and a clear bleeder bottle (old plastic jar or drink bottle will suffice), bleeding late-model ABS systems may also require the use of one or more relatively inexpensive combination valve pressure bleeding tools (which are used to depress one or more valves in order to allow component/system bleeding). To fully bleed the late model ABS systems, a scan tool should also be used to run the system through functional tests.
  1. Clean the top of the master cylinder, remove the cover and fill the reservoirs with clean fluid. To prevent squirting fluid, and possibly damaging painted surfaces, install the cover during the procedure, but be sure to frequently check and top off the reservoirs with fresh fluid.
CAUTION Never reuse brake fluid which has been bled from the system.
  1. The master cylinder must be bled first if it is suspected to contain air. If the master cylinder was removed and bench bled before installation it must still be bled, but it should take less time and effort. Bleed the master cylinder as follows:
    1. Position a container under the master cylinder to catch the brake fluid.
WARNING Do not allow brake fluid to spill on or come in contact with the vehicle's finish as it will remove the paint. In case of a spill, immediately flush the area with water.
    1. Loosen the front brake line at the master cylinder and allow the fluid to flow from the front port.
    2. Have a friend depress the brake pedal slowly and hold (air and/or fluid should be expelled from the loose fitting). Tighten the line, then release the brake pedal and wait 15 seconds. Loosen the fitting and repeat until all air is removed from the master cylinder bore.
    3. When finished, tighten the line fitting to 20 ft. lbs. (5 Nm).
    4. Repeat the sequence at the master cylinder rear pipe fitting.
During the bleeding procedure, make sure your assistant does NOT release the brake pedal while a fitting is loosened or while a bleeder screw is opening. Air will be drawn back into the system.
  1. Check and refill the master cylinder reservoir.
Remember, if the reservoir is allowed to empty of fluid during the procedure, air will be drawn into the system and the bleeding procedure must be restarted at the master cylinder assembly.
  1. On late model ABS equipped vehicles, perform the special ABS procedures as described later in this section. On 4 wheel ABS systems the Brake Pressure Modulator Valve (BPMV) must be bled (if it has been replaced or if it is suspected to contain air) and on most Rear Wheel Anti-Lock (RWAL) systems the combination valve must be held open. In both cases, special combination valve depressor tools should be used during bleeding and a scan tool must be used for ABS function tests.
  1. If a single line or fitting was the only hydraulic line disconnected, then only the caliper(s) or wheel cylinder(s) affected by that line must be bled. If the master cylinder required bleeding, then all calipers and wheel cylinders must be bled in the proper sequence:
    1. Right rear
    2. Left rear
    3. Right front
    4. Left front
  2. Bleed the individual calipers or wheel cylinders as follows:
    1. Place a suitable wrench over the bleeder screw and attach a clear plastic hose over the screw end. Be sure the hose is seated snugly on the screw or you may be squirted with brake fluid.
Be very careful when bleeding wheel cylinders and brake calipers. The bleeder screws often rust in position and may easily break off if forced. Installing a new bleeder screw will often require removal of the component and may include overhaul or replacement of the wheel cylinder/caliper. To help prevent the possibility of breaking a bleeder screw, spray it with some penetrating oil before attempting to loosen it.
    1. Submerge the other end of the tube in a transparent container of clean brake fluid.
    2. Loosen the bleed screw, then have a friend apply the brake pedal slowly and hold. Tighten the bleed screw to 62 inch lbs. (7 Nm), release the brake pedal and wait 15 seconds. Repeat the sequence (including the 15 second pause) until all air is expelled from the caliper or cylinder.
    3. Tighten the bleeder screw to 62 inch lbs. (7 Nm) when finished.
  1. Check the pedal for a hard feeling with the engine not running. If the pedal is soft, repeat the bleeding procedure until a firm pedal is obtained.
  2. If the brake warning light is on, depress the brake pedal firmly. If there is no air in the system, the light will go out.
  3. After bleeding, make sure that a firm pedal is achieved before attempting to move the vehicle.

Hope helps (remember to rate this answer).

Apr 13, 2011 | 1987 GMC Jimmy

1 Answer

1999 Ford E350 van problem: brake pedal is soft; have replaced master cylinder, rear wheel cylinders, rear brake shoes and drums, front calipers, rotors and discs; have bled master cylinder before...


Good question, on the antilock system is a bleader too and bleade it the same way you bleade the caliper. After all is done adjust the rear brakes, they should have a drag to them.

Feb 23, 2011 | 2007 Ford E-350 Super Duty Length XLT

2 Answers

My 1997 chevy 1500 z71 brakes suddenly going all the way to the floor. Checked brake fluid and it was low. Could be wheel cylinder? Master cylinder? or ?


well, check the brake lines for leakage after adding brake fluid to the full mark. If the brake pedal goes all the way to the floor, it's likely there is a leak somewhere after the master cylinder. If the pedal gets hard after adding fluid, and pumping it several times with the car off, then the master cylinder is still ok.

If air has gotten into the master cylinder, it may have to be bled out on a bench, or using a scanner if that's the way your vehicle is.

Bleeding the Brake System (ABS) Auto Bleed Procedure NOTE: Perform a manual bleeding procedure. If the brake pedal height and firmness results are not achieved, perform the auto bleed procedure below.
NOTE: Perform this procedure when replacing the brake pressure modulator valve or electro-hydraulic control unit.
  1. Perform the manual brake bleeding procedure. Refer to Bleeding the Brake System (non-ABS).
  2. Check the master cylinder fluid level often to prevent running the system dry.
  3. Press the brake pedal firmly and run the Scan Tool Automated Bleed Procedure (for Gas engines) once, or the Function Test (for Diesel engines) four times. Make sure to release the brake pedal between each test.
  4. Perform the manual bleed procedure again. This should remove the remaining air from the brake system.
  5. Bleed the system as many times as needed to obtain the appropriate feel of the brake pedal.

Dec 18, 2010 | 1997 Chevrolet K1500

3 Answers

Whats the procedure for bleeding brakes 2000 grand marquis


Bleed the master cylinder at the brake lines,then bleed right rear ,left rear,right front,and left front.

Jun 12, 2010 | 1998 Mercury Grand Marquis

1 Answer

How to change a master cylinder


a Master rates about a 5 out of 10 with 10 being the hardest

you may find the hardest part is the actual bench bleeding of the master
and/or
the replacement of the reservoir

These are the instructions from my service manual, but I do not remove the fluid prior to service steps 2-6

  1. Disconnect battery ground cable. Disconnect electrical connector from filler cap.
  2. Remove fluid reservoir filler cap.
  3. Raise and support vehicle.
  4. Remove front wheels.
  5. Remove dust cap and loosen bleed nipple. Connect a bleed tube to bleed nipple and into a suitable container.
  6. Pump brake pedal until all fluid is expelled. Tighten bleed nipple.
  7. Lower vehicle. Install brake fluid reservoir cap. Remove air cleaner and air cleaner outlet tube.
  8. Disconnect central electrical box electrical connector.
  9. Remove central electrical box retaining screw.
  10. Remove central electrical box and relocate to air cleaner area.
  11. Disconnect brake fluid feed tube. Disconnect brake lines.
  12. On models with anti-lock brakes, disconnect brake lines from Hydraulic Control Unit.
  13. On all models, remove brake booster vacuum hose.
  14. Extract master cylinder from vehicle.
  15. On models with manual transaxles, remove clutch hose from brake/clutch reservoir.
  16. On all models, remove master cylinder nuts and remove master cylinder.

To install, reverse removal procedure. Bleed brake system.

May 31, 2010 | 2001 Ford Focus

1 Answer

1992 Ford F350 Dually Diesel Truck Brake System problem.


Adjust your rear brake shoes. Then rebleed the system. Start at the master cylinder Bleed master first then the wheel furthest away from the master (right rear then left rear then right front then left front. Do that and your pedal should be good.

Nov 28, 2008 | 1992 Ford F350

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