Car

Ask a Mechanic Online and Get Answers to Your Car Questions

Ask an Expert,
Get an Answer ASAP!

Car

1993 gmc truck: new rear brakes..brake pedal..adjust

Customer Question
put new rear brakes on...
put new rear brakes on 1993 gmc truck..parking brake pedal now goes to floor..how do I adjust?
Submitted: 10 years ago.Category: Car
Show More
Show Less
Ask Your Own Car Question
Answered in 10 minutes by:
9/29/2007
Auto Mechanic: Eric, Automotive Repair Shop Manager replied 10 years ago
Eric
Eric, Automotive Repair Shop Manager
Category: Car
Satisfied Customers: 33,185
Experience: Automotive Repair Shop Manager, Technician/JA Mentor
Verified

Hi,

First, you need to make sure that the rear brakes are properly adjusted. The shoes should be adjusted so that the drum is a snug fit when going back on over the shoes. You should barely be able to turn the drums by hand. With rear tires off the ground and vehicle in nuetral, the tires should not be able to spin freely. If they do the rear shoes are out of adjustment. Also make sure that rear brakes were re-assembled correctly. Below is how the brakes should be re-assembled:

IF this answer has helped please hit the ACCEPT BUTTON or ask for more help. Positive feedback is always appreciated

Ask Your Own Car Question
Customer reply replied 10 years ago
Reply to Eric's Post: the diagram of the brake assembly doesn't match what is on the truck..we do not have abs just regular brakes..the adjusting bar we have is one the top part of the brake shoe assembly
Auto Mechanic: Eric, Automotive Repair Shop Manager replied 10 years ago

Hi,

See if this is yours-

Another view- make sure the actuator for adjuster is on correctly-

Here are installation instructions step by step-

  • Install the parking brake lever assembly The concave side of the washer should be against the shoe.

  • Install the adjuster pin in the shoe so that the pin projects 0.268-0.276 in. (6.8-7.0mm) from the side of the shoe where the actuator is installed.

  • Apply an approved brake lubricant grease to the threads of the adjuster screw, socket and socket face.

  • Make certain that the brake linings are positioned correctly and connect the upper spring. If you are not sure of which shoe goes where, remove the other brake drum and check it. Don't over-stretch the spring; you'll ruin it. The spring can't be stretched, safely, more than 8.04 in. (204mm).

  • Install the adjusting mechanism between the shoes. Make the following checks before installation:

    1. Be certain that the adjusting screw assembly engages the adjuster shoe and parking brake lever.

    2. Make sure that the spring clip is positioned towards the backing plate.

    3. The linings are in the correct positions. The shoe with the parking brake lever is the rear shoe.

  • Coat the shoe mounting pads on the backing plate with a thin coat of lithium grease.

  • Position the assembly on the backing plate, engaging the upper shoe ends with the wheel cylinder pushrods.

  • Hook the lower return spring into the shoe ends and spread the shoes, guiding the lower spring over the anchor plate. Don't over-stretch the spring; you'll ruin it. The spring can't be stretched, safely, more than 41/4 in. (108mm).

  • Install the hold-down spring assemblies.

  • Place the adjuster actuator over the end of the adjusting pin so its top leg engages the notch in the adjuster screw.

  • Install the actuator spring. Make sure that the free end of the actuator engage the notch of the adjuster nut. Don't over-stretch the spring. Its maximum stretch is 31/4 in. (83mm).

  • Connect the parking brake cable to the lever.

  • Turn the star adjuster until the drum slides over the brakes shoes with only a slight drag.

  • .

    Ask Your Own Car Question
    Ask Eric Your Own Question
    Eric
    Eric
    Eric, Automotive Repair Shop Manager
    Category: Car
    Satisfied Customers: 33,185
    33,185 Satisfied Customers
    Experience: Automotive Repair Shop Manager, Technician/JA Mentor

    Eric is online now

    A new question is answered every 9 seconds

    How JustAnswer works:

    • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
    • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
    • 100% Satisfaction GuaranteeRate the answer you receive.

    JustAnswer in the News:

    Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
    JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
    Web sites like justanswer.com/legal
    ...leave nothing to chance.
    Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
    Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
    I will tell you that...the things you have to go through to be an Expert are quite rigorous.

    What Customers are Saying:

    I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

    Stephanie PElm City, NC

    used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

    David L.Richmond, TX

    9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

    PhilMarysville, CA

    Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

    CharlesWalnut Creek, CA

    As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!

    SueCharleston, WV

    Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

    JimCastleberry, FL

    The nearest Volvo dealer is 160 miles away. Best $15 bucks I have spent in a long time!

    Paul MCorpus Christi, TX

    < Previous | Next >

    Meet the Experts:

    Chris (aka-Moose)

    Chris (aka-Moose)

    Technician

    1,243 satisfied customers

    16 years of experience

    Ted G.

    Ted G.

    ASE Certified Technician

    1,724 satisfied customers

    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness

    George H.

    George H.

    ASE Certified Technician

    1,537 satisfied customers

    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist

    GM Tech (Cam)

    GM Tech (Cam)

    Auto Service Tech

    669 satisfied customers

    GM Grand Master Technician 2007. 14 years experience.

    Amedee

    Amedee

    Former ASE Master Tech

    2,520 satisfied customers

    ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector

    Jerry

    Jerry

    Master Mechanic

    2,181 satisfied customers

    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager

    Richard

    Richard

    ASE Certified Technician

    1,000 satisfied customers

    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes

    < Previous | Next >

    Related Car Questions
    My 210 Suzuki Kizashi sometime will not start. Car display
    My 210 Suzuki Kizashi sometime will not start. Car display says turn steering wheel in both directions to unlock. Can I get this function disabled rather then repairing, I hear it is a bit costly! … read more
    Eric
    Eric
    Automotive Repair Shop Manager
    33,185 satisfied customers
    I need to know the type of transmission is in a 2006 Dodge
    I need to know the type of transmission is in a 2006 Dodge Caravan (3.3L) and also how many speeds there are: VIN # 1D4GP25R36B646548. Thank you.… read more
    Edward
    Edward
    Professional at Justanswer.com
    Associate Degree
    3,175 satisfied customers
    My cadillac is a 2008 cts 3.6. It is cranking but not
    My cadillac is a 2008 cts 3.6. It is cranking but not starting … read more
    David Craig
    David Craig
    OWNER/MECHANIC
    Associates
    4,396 satisfied customers
    I have a 1995 C280 and there is no braking on the passenger
    I have a 1995 C280 and there is no braking on the passenger side front wheel. … read more
    Expert
    Expert
    15 satisfied customers
    Catalytic converters are stopped up and glowing red hot on
    catalytic converters are stopped up and glowing red hot on my 1997 LS 400 how many are there ? … read more
    Matt
    Matt
    Engineer
    Bachelor\u0027s Degree
    5 satisfied customers
    I'm wondering if Exxon Synergy gas will hurt or harm my 2008
    I'm wondering if Exxon Synergy gas will hurt or harm my 2008 Prius. … read more
    K. Wiggins
    K. Wiggins
    ASE Certified Technician
    Associate Degree
    3,000 satisfied customers
    1999 isuzu trooper 3.5 v6 crank no spark, i have battery
    1999 isuzu trooper 3.5 v6 crank no spark, i have battery voltage, a trigger signal( a little dim), and ground is showing just over 200mv. Tested with key on whith a know good coil, im stumped. … read more
    Cesar Jimenez
    Cesar Jimenez
    Owner/CEO
    Vocational, Technical or Trade School
    85 satisfied customers
    My truck is sputtering but only when I'm under load like
    My truck is sputtering but only when I'm under load like during acceleration, I am throwing no codes so I'm not sure how to proceed … read more
    vwtech0405
    vwtech0405
    VW Technician
    Associate Degree
    9,666 satisfied customers
    I am installing a back up camera. want to wire to the back
    I am installing a back up camera. want to wire to the back up light. which color is the backup light and where is best place to ground? … read more
    Todd M
    Todd M
    Owner
    ASE Certification
    1,484 satisfied customers
    A problem with the heater. When the truck is idling no
    When the truck is idling no matter what the engine temp gauge shows the heater only blows cold air as soon as RPM is up like driving down the road above 1000 to 1500 RPM the heater works like a blast furnace no problem … read more
    Steve
    Steve
    Master\u0027s Degree
    954 satisfied customers
    I have a 2002 chevy carla SS, 3800 engine, with a check
    Second opinion] I have a 2002 chevy monte carla SS, 3800 engine, with a check engine light problem. Code showed 02 sencers. Changed both, cleared codes and drove it. After driving a little ways, check… read more
    Matt
    Matt
    Engineer
    Bachelor\u0027s Degree
    5 satisfied customers
    I have 2010 Kia Soul 2.0 engine automatic trans. Would like
    I have 2010 Kia Soul 2.0 engine automatic trans. Would like to know if it has timing chain or timing belt. It has 96000 miles, will it need to be replaced??? … read more
    Expert
    Expert
    15 satisfied customers
    Won't start when it's cold has new battery, spark plugs and
    Won't start when it's cold has new battery, spark plugs and boots … read more
    Steve
    Steve
    Master\u0027s Degree
    954 satisfied customers
    My 2002 ES300 won't start. The battery seems fine. It does
    My 2002 ES300 won't start. The battery seems fine. It does not tick and the starter does not turn. How do I get the relay compartment apart to test the starter? … read more
    Chad Farhat
    Chad Farhat
    Owner
    Associate Degree
    4,410 satisfied customers
    I accidentally put $50 0f unleaded fuel in my son's
    I accidentally put $50 0f unleaded fuel in my son's Mercedes, instead of diesel . Oviously I am quite distraught and need to know the next step and maybe a ball park price. … read more
    Gary
    Gary
    Senior Technician
    Vocational, Technical or Trade School
    58 satisfied customers
    2000 kia sportage runs at idle its 4x4 se 2.o engine
    2000 kia sportage runs at idle its 4x4 se 2.o engine sluggish up hill no power ,put in new fuel filter tps no chonge … read more
    JOHN aka Eauto
    JOHN aka Eauto
    self employed
    High School or GED
    10,348 satisfied customers
    Have a 2014 Range Rover sport with jag/Rover 3.0 6
    Have a 2014 Range Rover sport with jag/Rover 3.0 6 cylindrical gas supercharge motor. Replacing my timing chains and have no spec showing the setting for the chains. Can someone please provide diagram… read more
    Eric
    Eric
    Automotive Repair Shop Manager
    33,185 satisfied customers
    The new cv shafts for my Pulsar N16 1.8 litre automatic
    The new cv shafts for my Pulsar N16 1.8 litre automatic turned out to be for a manual transmission. Have now fitted the correct shaft on the driver side. Is the passenger side shaft the same for both … read more
    Jay
    Jay
    Shop Forman / Lead Tech
    Vocational, Technical or Trade Scho
    20,878 satisfied customers
    Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

    Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

    Show MoreShow Less

    Ask Your Question

    x