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Brake Booster Market - Freescale Semiconductor

PERFOMANCE BOOST The Freescale* MPXV4115V pressure sensor is the ideal part for automotive vacuum sensing needs such as those found in the brake booster application. Prepared by Marc Osajda Automotive Sensor Marketing Motorola – Toulouse, France Advanced braking systems are becoming increasingly common in today’s automobiles. Higher level systems and technology now being used in “brake assist systems” (BAS) in several European cars, have made it possible for more efficient and intelligent braking systems. A key functional application block found in these braking systems that has advanced with this technology surge, is the vacuum brake booster function. Here are a few driving factors behind the need and use of the brake booster, which helps ensure a safer braking system. Independent Systems: In current gasoline engine cars, the engine’s intake manifold generates the vacuum for the brake booster. This system works fine with one exception. The amount of vacuum in the brake booster is unknown by the braking system. Thus the amount of amplification is also unknown. If heavy braking is needed, there is no possibility for the brake system to interact with the intake manifold if additional amplification is required. The manufacturer’s interest for having the vacuum generated by an auxiliary vacuum pump is that the brake system can manage the amount of vacuum as required, on demand. This in turns gives it the ability to perform amplification on its own, giving it complete independent from the engine’s operating condition. The auxiliary pump is also able to provide higher amounts of vacuum whenever necessary. In situations calling for heavy braking, the pressure will naturally decrease in the brake booster, also causing a decrease in the amplification during braking. With an external pump it is possible to maintain, or even increase the amplification during a heavy braking phase. Smart Safety: Wheel blocking due to high-braking force is controlled by the Anti-Lock Brake System (ABS). However, it has been observed that in many cases, drivers do not...

HYDRO-BOOST BRAKE BOOSTER Installation Guide REMOVING ...

930394-52 Rev. 12/22/05 4:21 PM Page 1 HYDRO-BOOST BRAKE BOOSTER Installation Guide 4. Enable ignition system and start the engine. 7. Check fluid level and add fluid if needed. 5. Turn the steering wheel from stop to stop several times. Do not hold it against the stop. 8. Again start engine and turn steering wheel from stop to stop several times (avoid turning fully against stops as much as possible). Recheck fluid level and fill as required. If there is evidence of fluid foaming, turn off engine and wait an hour for foam to clear. Lacks Power Assist Booster or Pedal Chatters X X X Looses Reserve Pressure HAIRPIN CLIP BRAKE PEDAL PUSHROD X PUSHROD SPACER PUSHROD BUSHING 6. Loosen the locknuts holding the HydroBoost unit to the firewall and then slide the linkage, nylon washers and brushing off the pedal pin. 4. Disconnect all hydraulic lines from the Hydro-Boost unit (pressure, steering gear and return lines). PRESSURE LINE MASTER CYLINDER HYDRO-BOOST SPACER X X X BRAKE LINES DO NOT DISCONNECT JDA356 STOP-LIGHT SWITCH 3. Separate the master cylinder from the mounting studs. N OT E : DO NOT disconnect the brake lines from the master cylinder unless necessary to avoid bending or damaging those lines. X Pedal Returns Slowly 5. Disconnect the Hydro-Boost pushrod linkage from the brake pedal. NOT E : It may be necessary to remove the stoplight switch from the brake pedal. If so, unplug the stoplight switch wires, remove the hairpin retainer, slide the switch off the pedal pin just far enough to permit removing the switch from the pin. Do not damage the switch. N OT E : Before beginning work, be sure vehicle is parked in a level area and that wheels are chocked to prevent unintentional movement. Read all of these instructions before attempting to install the HydroBoost unit. 2. Remove the nuts attaching the master cylinder to the Hydro-Boost unit.

Vacuum Brake Booster Testing and Diagnosis.pdf

Vacuum Brake Booster Testing and Diagnosis Vacuum Brake Booster Testing and Diagnosis This procedure will require the use of a hand operated vacuum pump with a vacuum gauge. If you do not own one it can often be rented or borrowed from most “big box” parts stores. (Note: 18”HG is the minimum engine vacuum at idle in gear to effectively operate a vacuum booster 1) Remove vacuum hose from check valve on booster. Place hose from vacuum pump onto check valve and draw booster to 20” of vacuum. 2) Let booster sit with vacuum applied for 5 minutes. If vacuum does not stay steady at 20” it is faulty and needs to be replaced. If vacuum does hold steady at 20” proceed to step 3. 3) With 20” of vacuum in booster depress brake pedal once and release it. The booster should transfer some but not the entire vacuum in reserve. Depending on how hard the pedal is depressed it is normal to see 5-10” of vacuum depleted from reserve. The most important thing is to ensure the booster does transfer vacuum but does NOT transfer the entire vacuum in its reserve. If vacuum remains at 20” OR goes to zero the booster is bad and will need to be replaced. If vacuum transfer is within the above parameter proceed to step 4. 4) Once again draw booster down to 20” of vacuum. Go inside car and depress brake pedal and hold down for 30 seconds. You should see the gauge drop slightly and then hold steady. Vacuum should stay steady as long as you are holding the pedal down. If vacuum drops while pedal is being held down the booster is faulty and will need to be replaced.

BPI 10-06 Temporary reduction in power brake ... - Raybestos Brakes

No. BPI 10-06 Subject: Temporary reduction in power brake assist in extreme cold weather Vehicles Involved: Models: 2009 BUICK ENCLAVE 2009 CHEVROLET TRAVERSE 2009 GMC ACADIA 2009 SATURN OUTLOOK From 9J100008 From 9S100002 From 9J100016 From 9J100003 to to to to 9J190898 9S143268 9J190899 9J190888 Condition: If the brake check valves are NOT installed correctly, an increased amount of brake pedal effort will be required to obtain brake function, and the brake assist system will NOT perform as designed. Repair: Replace the first design brake booster vacuum hose check valve (1) with a second design brake booster vacuum hose check valve (2). An arrow on the second design check valve indicates the vacuum draw direction (3). 1. Remove the fuel injector sight shield (engine cover) from the engine. 4400 Prime Parkway McHenry, IL 60050  (815) 363-9000 Determine where the two brake booster vacuum hose check valves are located. Refer to callouts 1 and 2 in the illustration 2. Release the quick connect (4) from the power brake booster auxiliary pump (3). 3. Remove the protective wrap (5) from the brake booster vacuum hose to locate check valve # (1). 4400 Prime Parkway McHenry, IL 60050  (815) 363-9000 4. Remove the check valve (1) from the brake booster vacuum hose that routes to the power brake booster auxiliary pump (3). 5. Remove the check valve (2) from the brake booster hose that routes to the intake manifold vacuum port (6). Note If necessary, a small amount of denatured alcohol can be used as an assembly aid for installing the vacuum hose to the manifold vacuum port. Do not use soap. 6. Install a new check valve (1) to the brake booster hose that routes to the power brake booster auxiliary pump (3). Ensure the arrow on the check valve (1) ...

Brake Booster - Subaru Outback Forums
by moncoZ 0 Comments favorite 0 Viewed Download 0 Times

(2) Four brake booster installation nuts A: REMOVAL 1) Remove or disconnect the following parts in the engine compartment. (1) Disconnect the connector of brake fluid level gauge. (2) Remove the brake pipe from the master cylinder. (3) Remove the master cylinder installation nut. (1) CAUTION: In order to prevent the contact of the bracket and check valve, be sure to loosen the master cylinder mounting nut while holding the bracket with hand. Otherwise it may deform the bracket. (1) Check valve (2) Bracket (4) Disconnect the vacuum hose from brake booster. 2) Remove the following parts from the pedal bracket. (1) Snap pin and clevis pin Nut Clevis pin Snap pin Operating rod Brake pedal 3) Remove the brake booster while avoiding the brake pipe. NOTE: • Make sure that the booster shell and vacuum pipe are not subject to strong impacts. • Be careful not to drop the brake booster. If the booster is dropped, replace it. • Use special care when handling the operating rod. If excessive force is applied to the operating rod, the angle may change by r3°, and it may result in damage to power piston cylinder. • Be careful when placing the brake booster on floor. • Do not change the push rod length. CAUTION: • Do not disassemble the brake booster.

Your Webinar Will Begin Shortly - Motor Coach Industries

Welcome to the MCILEARN Series Your Webinar Will Begin Shortly Today’s Topic Shake Out: Vibration Analysis If you do not have an audio connection, dial 877-739-5904 and enter the Audio PIN number given to you on your screen © 2012 Motor Coach Industries Int'l, Inc. and its subsidiaries. All Rights Reserved. Learning Objectives • Identify the different classifications of vehicle driveline vibrations • Begin to diagnose & locate the source of a vehicle driveline vibration • Provide a correction to eliminate the vibration from the vehicle © 2012 Motor Coach Industries Int'l, Inc. and its subsidiaries. All Rights Reserved. Safety Message • Always use personal protection devices – Safety glasses, ear protection, etc • Always observe all safety precautions listed in the Maintenance Manual including but not limited to: – – – – – – Ensure coach is on a level surface Ensure parking brake is applied Chock wheels Always use jack stands Shut off batteries Utilize Lock Out/Tag Out procedures © 2012 Motor Coach Industries Int'l, Inc. and its subsidiaries. All Rights Reserved. Vibration Identification: Identifying the Source of a Vibration © 2012 Motor Coach Industries Int'l, Inc. and its subsidiaries. All Rights Reserved. Vibration Analysis Primary sources of vibrations • Tires & Wheels – Rims, tires, hub & drum assemblies • Driveline – Driveshaft & slip-joint, u-joints, yokes & flanges – Working angle of driveshaft • Engine & Transmission – Crankshaft, injectors & cylinders, vibration dampers, engine supports, exhaust...

driveshaft series 6Q – 175 – 250 - SPX Cooling Technologies

driveshaft series 6Q – 175 – 250 I N S TA L L AT I O N - O P E R AT I O N - M A I N T E N A N C E M92-1442B I SSU E D 4/2013 R EAD AN D U N D E R STAN D TH I S MAN UAL PR IOR TO OPE RATI NG OR S E RVICI NG TH I S PROD UCT. Before installing the driveshaft, be sure the motor and Geareducer are on level bases and that their shafts are in reasonable alignment. Note match numbers on the driveshaft flanges and remove the yokes. Coat the motor shaft and Geareducer shaft with “Thred-Gard” (Crane Packing Co.) or similar lubricant. Place the key halfway in motor and Geareducer shafts, then install yokes as shown in Figure 4. Use a rubber mallet or wood block when tapping yokes to prevent damage. Tighten each yoke set screw against key. Align match numbers on tube and yoke flanges and bolt the tube and flange assembly to the Geareducer yoke while supporting the motor end of the tube and flange assembly. Progressively tighten bolts to 60 ft·lbƒ (82 N·m) torque. Slide the motor so that motor yoke can be bolted to the tube and flange assembly without pushing or pulling on the bushings. Align match numbers and bolt the motor yoke to the tube and flange assembly. Progressively tighten bolts to 60 ft·lbƒ (82 N·m) torque. The distance between tube and yoke flanges should be as shown in Figure 4.

Drive Line / Universal
by Maradoni 0 Comments favorite 3 Viewed Download 0 Times

– Drivelines and Universal Joints Universal Joint Maintenance • Most factory-installed universal joints are sealed and don’t require periodic lubrication • After-market replacement joints are equipped with a grease fitting and must be greased periodically Drive Shaft Problem Diagnosis • Road testing – Vehicle should be driven while accelerating and decelerating as well as at various steady speeds – Vibrations caused by worn U-joints usually occur while accelerating Types and Causes of Vibrations • High speed vibrations – Usually caused by driveshaft imbalance • Vibrations during acceleration – Usually caused by worn double Cardan joint ball and socket • Low speed vibrations – Usually caused by improper operating angles Noise Diagnosis • Clunking noise while accelerating from a dead stop – Usually caused by worn or damaged U-joint – Can be caused by problems including excessive clearance between slip joint and extension housing • Squeaking noise – Often caused by worn or poorly lubricated U-joint Reasons for Universal Joint Failure • Lack of lubrication • Pushing another car • Towing a trailer • Changing gears abruptly • Carrying heavy loads Steps in Lubricating U-Joints 1. Wipe off the nozzle of the fitting 2. Attach the hose of the grease gun to the fitting 3. Pump grease slowly into the fitting 4. Stop pumping when grease appears at the bearing cups Inspecting the Drive Shaft • Check for fluid leaks • Check the U-joints for signs of rust or leakage • Check for movement in the joint while trying to turn the yoke and the shaft in opposite directions • Check the drive shaft for dents, missing weights, and undercoating or dirt...

DRIVESHAFT AND UNIVERSAL JOINT SERVICE ... - worldtracker.org

M10_BIRC4058_05_SE_C10.QXD 3/30/07 Chapter 10:52 AM Page 255 10 DRIVESHAFT AND UNIVERSAL JOINT SERVICE OBJECTIVES After studying Chapter 10, the reader should be able to: 1. Perform the maintenance operations needed to keep a driveshaft operating properly. 2. Diagnose the cause of common FWD driveshaft problems. 3. Recommend the proper driveshaft repair procedure. 4.Correct RWD U-joint angularity and driveshaft balance problems. 5.Remove and replace FWD and RWD driveshafts. 6.Disassemble, inspect, and reassemble the common U-joints. 7.Make normal U-joint and CV joint repairs. 8.Complete the ASE tasks for content area D, Driveshaft and Universal/Constant-Velocity Diagnosis and Repair. KEY TERMS Antilock braking system (ABS) (p. 274) Balancing (p. 268) Grease spray (p. 258) Level protractor (p. 267) Phasing (p. 265) Plug-in connection (p. 272) Reluctor (p. 274) Runout (p. 262) 46106...

XT100-08am Driveshaft Vibration.pdf - JagRepair.com - Jaguar ...

X-TYPE DATE 05/04 Amended 09/04 XT100-08 TECHNICAL BULLETIN SERVICE Driveshaft Vibration – Diagnostic Method – Repair MODEL 2002-04 MY X-TYPE VIN C00001-E02938 Remove and destroy Bulletin XT100-08, dated 05/04. Replace with this Bulletin. Revisions are marked with a bar and in bold text. Issue: A new procedure has been developed for use after the WDS Vehicle Vibration Analyzer (VVA) has confirmed a vehicle vibration. Action: After a driveshaft vibration has been confirmed using WDS VVA, follow the workshop procedure outlined below. WORKSHOP PROCEDURE Note: There is no Labor Time Allowance to carry out road test diagnosis. Jaguar recommends a claim of 0.50 hrs. as straight time for VVA. Warning: Driveshaft bolts are one-time use only. Use new bolts for the final repair. Existing bolts may be reused throughout the diagnostic procedures. Raise vehicle on twin-post lift. Check for alignment of the green line on the rear differential flange with white paint spot on the rear of the driveshaft. If not aligned continue from step 3; if aligned continue from step 16. Remove the rear driveshaft joint to rear differential flange bolts and links where accessible. Rotate the driveshaft and remove the remaining rear driveshaft joint to rear differential flange securing bolts and links. Displace driveshaft from the rear differential flange. Remove and discard the gasket from the rear differential flange (where installed). Clean the mating faces. Install a new gasket to the rear differential flange, if previously installed. NOTE: THE INFORMATION IN TECHNICAL BULLETINS IS INTENDED FOR USE BY TRAINED, PROFESSIONAL TECHNICIANS WITH THE KNOWLEDGE, TOOLS, AND EQUIPMENT TO DO THE JOB PROPERLY AND SAFELY. IT INFORMS THESE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR PROVIDES INFORMATION THAT COULD ASSIST IN PROPER VEHICLE SERVICE. THE PROCEDURES SHOULD NOT BE PERFORMED BY “DO-ITYOURSELFERS.” DO NOT ASSUME THAT A CONDITION DESCRIBED AFFECTS YOUR CAR. CONTACT A JAGUAR RETAILER TO DETERMINE WHETHER THE BULLETIN APPLIES TO YOUR VEHICLE. Date of issue 05/04 Amended 09/04

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