Question about 1989 Ford F 350

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How to put in a brake booster and master cylinder on a 1989 ford motorhome

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Really no different than on small cars unless you have Air brakes. Before doing this, test booster for leaks by spraying water mist on brake booster with engine running.

Engine will run differently or stall if booster draws in water mist. Try suction to remove brake fluid from Master as you will smell brake fluid that you spill or open brake line and let fluid out on both front and rear wheel. You may not need a different brake booster.

Money can be saved by repairing yourself, but what I suggest is bad brake work can cause an accident. Other repairs may not have that potential. At least watch a Video through an internet search, get a HELP CD from an Autoparts store or watch someone in person first.

You will need some quality FLARE wrenches to keep from rounding off the tubing fittings.

Posted on Apr 22, 2015

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Posted on Jan 02, 2017

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1 Answer

How do you replace the brake booster on a 1989 Lincoln town car?


Remove vacuum hose from booster. Remove the two nuts holding the brake master cylinder to the booster. Carefully move booster to one side for ease of removal. Under the dashboard drivers side, remove the clip connecting the brake pedal to the booster actuator rod. Remove the two nuts holding the booster to the firewall. Outside, remove the booster. Installation is reverse of removal. There may be an adjustable rod in the replacement booster. It is important that it is adjusted properly or you may not have brakes or you could damage the master cylinder. Looking at the old booster, check to see how far the rod extends out the front of the booster. Check the new booster and make sure that the new rod extends the same distance. DO NOT ADJUST THE RODS TO THE SAME LENGTH BY PLACING THEM SIDE BY SIDE! Different designs could cause different rod length internal to the booster. What is important is the amount that extends out from the booster. This distance will not change since the master cylinder bolts directly up to the booster.

Oct 16, 2015 | Lincoln Cars & Trucks

1 Answer

Do you have to remove brake lines when you change the brake booster


Check rear of Master Cylinder--If wet likely Master Cylinder Leaking and Booster Damaged. They Should be replaced as a mated pair. (for warranty) and brake lines removed and system bled.

Oct 16, 2014 | 1988 Ford F 150

1 Answer

My 1986 ford bronco 2 with a 2.9l v6 needed a brake master cylinder. i replaced it with a brand new one, and noticed that the base of the master cylinder, where it mounts to the brake booster, is leaking a...


You should not have any fluid leaking.
1.The new master cylinder may have been manufacturer incorrectly, but unlikely. 2.Did you reuse the fluid tank or did it come with a new one? If you re-installed old tank, seal may have not seated correctly. 3. Did you tighten the brake lines correctly? 4. It may be that there was fluid that leaking into the booster from the old cylinder, and that fluid is now coming out of the booster with use. One indication would be if the reservoir tank is showing any fluid drop. If it is the problem is 1,2, or 3 above. Let me know what you find out by leaving a comment.
I hope this helps. Feel free to comment or ask further questions.

Thanks for using FixYa - a 4 THUMBS rating and POSITIVE TESTIMONIAL is appreciated for answering your FREE question.

Feb 09, 2011 | 1989 Ford Bronco II

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

1 Answer

How do i replace a power brake booster on a 97 ford taurus


  1. Step 1 Mark the brake lines coming into and out of the master cylinder using masking tape and permanent marker.
  2. Step 2 Orient the tube wrench so that it grabs the end of the nut by first sliding it over the brake line.
  3. Step 3 Pull the brake lines out of the master cylinder.
  4. Step 4 Unbolt the two bolts that hold the master cylinder to the brake booster.
  5. Step 5 Slide the master cylinder off the brake booster.
  6. Step 6 Remove the bolts that hold the brake booster to the firewall.
  7. Step 7 Remove the cotter pin from the pin holding the back of the brake pedal to the master cylinder.
  8. Step 8 Slide the brake booster to brake pedal pin out of the mounting bracket.
  9. Step 9 Pull the brake booster off the firewall.
  10. Step 10 Install the new brake booster. Installation is the reverse of removal.

Apr 24, 2010 | 1997 Ford Taurus

1 Answer

How to replace master cylinder on 1989 century


You have to Remove the brake lines going to the cylinder, then remove the 2 nuts holding it to the brake booster.

Make sure u bench bleed the new master before you install, the new one should come with a bench bleed kit, u must attach the 2 hoses to both ports on the master cylinder where the brake lines connect to, then run the 2 hoses into the top of the reservor and fill it with fluid, use a screw driver and pump the master cylinder until you can see no air bubbles running through the hoses

Apr 08, 2010 | 1989 Buick Century

1 Answer

Replacing my brake booster


go to the master cylinder and remove it from the booster, disconnect the vacuum line from the booster, then disconnect the brake plunger from your brake pedal inside the vehicle, then remove the booster mounting bolts from inside the vehicle then remove the booster, install in reverse order, once you install the master cylinder, you will need to bleed out any air in the brake system, hope this helps, let me know

May 16, 2009 | 1996 Ford Ranger SuperCab

1 Answer

Ford Bronco II spongy brake pedal


if the booster is bad the pedal would be hard sounds like the e-brake is stuck take off the drums and make sure the arms are all the way back then did you adjust the rear brakes after changing the shoes

Dec 14, 2008 | 1989 Ford Bronco II

2 Answers

1989 Ford F350 2 wheel drive dually 460 ci gas motor


5 Inspect Brake Fluid Type Brake fluid loss or contamination grey_line.gif 10 Inspect Master Cylinder (Brake System) Worn or leaking brake master cylinder. grey_line.gif 11 Inspect Brake Power Booster Damaged booster vacuum line/check valve, or diaphram

Nov 24, 2008 | 1989 Ford F 350

1 Answer

Changing a power brake booster off a 84 ford f350 truck


Pretty simple repair.I even did this alone.
DO NOT disconnect the brake lines unless you are changing the master cylinder out with it. Unbolt the master cylinder and move it forward slightly. From inside the truck,unbolt the brake pedal from the rod, leave the pedal hanging. Remove the 4 bolts at the firewall that retain the booster.From outside the truck reach in and draw the old booster out.You may have to move the master cylinder up or down to clear the booster.
The rod to the brake pedal will come out with the booster,make sure you put it back on the new one.

Reverse to install.

good luck
Dave

Jun 14, 2008 | 1984 Ford F 350

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