Question about 2002 Hyundai Santa Fe

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I have a slow brake fluid loss. I think it may from the master cylinder. Are there any seals in the lines that go into the master cylinder unit.

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  • Hyundai Master
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The fluid goes low in the master cylinder tank as the brakes wear down. u will see and can smell brake fluid, leaks in lines r not slow even at the seals on the front rotors or rear rotors/or cylinder at rear ur pedal will b spongy or goes to floor with leak if this is happening get repairs asap

Posted on Sep 24, 2009

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  • Master
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No they are inverted flare fittings no seals check all lines and calipers/wheel cylinders if all are dry remove the vacuum hose from the booster if there is brake fluid in the hose the master cylinder is bad

Posted on Sep 24, 2009

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  • Hyundai Master
  • 2,050 Answers

Not at the line to cylinder connection, but internal there are.
You need to have a good look under the vehicle for a leak, and even pull all four wheels to closer inspect calipers. (Or wheel cylinders if you have rear drum brakes)
Also, keep in mind that your brake fluid level will go down slighly as the brake pads wear down. When your brakes are replaced new, the mechanic pushes your caliper pistons back in, to allow for the new and thicker brake pads, and the fluid level will go back up into the master cylinder.

Posted on Sep 24, 2009

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02 Ford Explorer sporttrac xlt. New rotors calipers pads and master cylinder. Bled it twice stream looks good new fluid. One day breaks stick then the next no breaks Break light on Proportional valve?


For some reason these vehicles you need to bleed brakes several times, had same problem, so air hangs up in lines somewhere it apears. When you say brakes sticks, describe it better, locked up, or dragging on rotors?
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Apr 21, 2015 | 2002 Ford Explorer Sport Trac

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Brakes loosing fluid but can not find leak


One or more of your inside wheel rims and calipers aren't wet ? no external leaks visible lines/fittings ? fluid could be draining into power booster if master cylinder seals are bad enough. If brake pedal slowing falls under pressure of your foot, after you've stopped, like while sitting at red light, odds are its bad seals in master cylinder, damage to brake booster if this is case if not repaired asap. You apply brakes before starting car to check booster.If pedal smoothly falls after starting car, booster fine

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ABS warning light ON; brake pedal sinks to floor when applied; total loss of braking.


Your ABS light is on because the system detected a failure in the brake system. Sounds like either your master cylinder is bad or one of your brake lines has ruptured. Usually a master cylinder seal will degrade over time, not insantly. In a dual master cylinder configuration like all newer vehicles, you should still have some braking, even if a front or rear line ruptures. 1st step, check your fluid level.

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if you have fluid leaking where you say, then I would suggest you get a new master cylinder or if you can a repair kit (don't think you can get these now though). the fluid is getting past the seals in the main cylinder that is connected to the brake peddle, any leak here is dangerous as it can lead to sudden loss of brakes.

Jan 21, 2014 | 2002 Kia Spectra

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I bleed brakes i get good brake for a day or two then they go out again what can i do


air must be entering the system somewhere, check all wheel cylnders for leaks, and check the master cylnder for leaks( some cars's master cylnders leak at the firewall and fluid runs down inside the car under the carpet)

Jul 12, 2011 | 1992 Buick LeSabre

1 Answer

I think i need a master cylinder in my 1994 pontiac bnneville? How hard/easy it it to replace myself. I can purchase ne for around 50-60 dollars.


Yes it is not that hard to replace.

57435341
REMOVE OR DISCONNECT
  1. Retainer and electrical connector from fluid level sensor.
  2. Drain brake fluid front mister cylinder reservoir.
  3. Reservoir hose from master cylinder. Plug hose to prevent fluid loss and contamination.
  4. Brake pipes from master cylinder. Plug open pipes to prevent fluid loss and contamination.
  5. Two attaching nuts.
  6. Master cylinder.
  7. Reservoir, if it is to he used on replacement master cylinder.
INSTALL OR CONNECT
  1. Reservoir onto master cylinder, as needed.
  2. Master cylinder on to power booster.
  3. Attaching nuts. Tighten to 27 Nm (20 lb. ft.).
  4. Brake pipes. Tighten brake pipe fittings to 15 Nm (11 lb. ft.).
  5. Reservoir hose onto master cylinder.
  6. Fill master cylinder reservoir to full level mark using only Delco Supreme 11 Brake Fluid, or equivalent DOT 3 brake fluid.
  7. Electrical connector to fluid level sensor, secure with retainer.
  8. Bleed hydraulic system.
  9. Recheck fluid level in reservoir
113253687

Mar 09, 2011 | 1994 Pontiac Bonneville

2 Answers

When I start the truck, brake pedal goes down on it's own and will not come back up unless you pull it up , Booster?


The booster is working properly if the pedal goes down a little when starting the truck. Seems more like it's a master cylinder problem if it won't pump up.

REMOVAL & INSTALLATION Fig. 1: Disconnect the warning indicator at the master cylinder 88289p00.jpg
Fig. 2: Remove the fluid to minimize the amount that would otherwise inevitably be spilled 88289p01.jpg
Fig. 3: Unscrew the line fittings at the master cylinder 88289p02.jpg
Fig. 4: Hold a rag under the fittings to keep fluid from dripping all over things 88289p03.jpg
Fig. 5: Unbolt the master cylinder from the brake booster 88289p04.jpg
Fig. 6: Remove the master cylinder from the vehicle and set it in a clean location 88289p05.jpg
  1. Disconnect the negative battery cable.
  2. Apply the brake pedal several times to exhaust all the vacuum in the system.
  3. Detach and cap the brake lines from the master cylinder.
  4. If equipped, detach the brake warning indicator connector. NOTE: A turkey baster (tapered tube with a squeeze ball on top) works well for removing fluid from the reservoir (see photo).
  5. Siphon off the fluid from the master cylinder reservoir to minimize spillage when lines are disconnected.
  6. If applicable, disconnect and cap the Hydraulic Control Unit (HCU) supply hose at the master cylinder reservoir and secure in a position to prevent loss of fluid.
  7. Unfasten the 2 nuts and lockwashers that attach the master cylinder to the brake booster.
  8. Remove the master cylinder from the booster by sliding it forward and upward from the vehicle. To install:
  9. Install a new seal in the groove in the master cylinder mounting face.
  10. Position the master cylinder assembly over the booster pushrod and onto the 2 studs on the booster assembly.
  11. Install the retaining nuts, then tighten to 18–25 ft. lbs. (24–34 Nm).
  12. Uncap and connect the brake lines to the master cylinder. Tighten the front fitting to 16–21 ft. lbs. (21–29 Nm), and the rear fitting to 10–15 ft. lbs. (15–20 Nm).
  13. Uncap and connect the HCU hose to the master cylinder reservoir fitting and secure with a hose clamp.
  14. If equipped, connect the brake warning indicator.
  15. Fill the master cylinder with Heavy Duty Brake Fluid C6AZ-19542-AA or equivalent DOT 3 brake fluid from a clean, sealed container. Bleed the entire brake system, as outlined in this section.
  16. Connect the negative battery cable.
  17. Operate the brake several times, then check for external hydraulic leaks.
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Aug 03, 2010 | 1992 Ford F350

3 Answers

Brakes


bad power booster

Jul 13, 2009 | 2002 Nissan Sentra

2 Answers

My 1994 buick lesabre's brakes will not work. I have low brake fluid and the brake pads were just replaced. My friend said that there was brake fluid leaking from the car and that I might need a master...


if you can see a good amount of wet brake fluid between the brake master cylinder and the brake booster. and you have been adding fliud often,you could have a bad master cylinder. it has to be replaced not rebuilt. you however may have a far more common problem, a rusted through brake line.have someone pump the brake pedal, than look under the car for a brake fluid leak ,repair as needed. than bleed the brakes for a good hard brake pedal
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2 Answers

Soft brakes


then you will need a master cylinder or a brake booster

Jan 30, 2009 | 1988 Jeep Cherokee

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