<output id="0zrjl"><em id="0zrjl"></em></output>
    1. <tr id="0zrjl"></tr>
      <table id="0zrjl"><noscript id="0zrjl"></noscript></table>

        <p id="0zrjl"><strong id="0zrjl"></strong></p>
        產品展示

        當前位置:首頁 -> 產品展示->產品展示>約翰迪爾強鹿柴油機渦輪增壓器故障分析

        約翰迪爾強鹿柴油機渦輪增壓器故障分析

        詳細描述

        John Deere約翰迪爾強鹿柴油機渦輪增壓器故障分析

        CAUTION: After operating engine, allow exhaust

        system to cool before removing turbocharger.

        IMPORTANT: When cleaning turbocharger, do not

        spray directly into compressor cover or

        turbine housing. If turbocharger

        inspection is required, do not clean

        exterior prior to removal. Doing so may

        wash away evidence of a potential

        failure mode. See TURBOCHARGER

        INSPECTION later in this group.)

        1. Thoroughly clean exterior of turbocharger and

        surrounding area to prevent entry of dirt into the air

        intake system during removal.

        2. Remove air intake hose and exhaust elbow (shown

        removed). Loosen hose clamp (A).

        3. Disconnect oil inlet line (B) and oil return pipe (C) from

        turbocharger (D).

        4. Remove mounting cap screws and nuts and lift

        turbocharger from exhaust manifold. Remove stainless

        steel gasket.

        5. Place turbocharger on a clean flat surface. Cap or plug

        all air intake and exhaust openings.

        6. Perform turbocharger inspection as described later, if

        failure mode has not yet been determined. (See

        TURBOCHARGER INSPECTION in this group.)

        John Deere約翰迪爾強鹿柴油機渦輪增壓器故障分析

        Turbocharger Failure Analysis

        The following is a guide for diagnosing the cause of

        turbocharger failures after removal from the engine.

        Problem Possible Cause Suggested Remedy

        COMPRESSOR HOUSING INLET DEFECTS

        Foreign Object Damage Objects left in intake system. Disassemble and inspect intake system for foreign

        objects (this group).

        Inspect engine for internal damage.

        Leaking and/or defective intake system. Inspect air intake system connections including air

        filter; repair as required (this group).

        Inspect air intake related engine components.

        Compressor Wheel Rub Bearing failure. Determine if engine and/or operator contributed to lack

        of lubrication, contaminated lubrication, excessive

        temperature, or debris generating engine failure in

        progress. Correct as required.

        Manufacturing defects. Correct as required (this group).

        COMPRESSOR HOUSING OUTLET DEFECTS

        Oil and/or Dirt in Housing Restricted air intake system. Inspect and clean air cleaner.

        Prolonged periods of low rpm engine Check with operator to confirm conditions. (See

        idling. Operator’s Manual.)

        Defective oil seal ring. Repair as required (this group).

        Restricted oil drain line. Inspect and clear oil drain line as required.

        TURBINE HOUSING INLET DEFECTS

        Oil in Housing Internal engine failure. Inspect and repair engine as required.

        Oil leaking from compressor housing Verify that oil is in compressor housing and refer to

        seal. “Compressor Housing Outlet Defects” as listed earlier

        in this chart.

        Center Wall Deteriorated Excessive operating temperature. Check for restricted air intake.

        Check engine for overfueling.

        Check injection pump timing.

        TURBINE HOUSING OUTLET DEFECTS

        Turbine Wheel Rub Bearing failure. Determine if engine and/or operator contributed to lack

        of lubrication, contaminated lubrication, excessive

        temperature, or debris generating engine failure in

        progress. Correct as required.

        Manufacturing defect. Correct as required (this group).

        Foreign Object Damage Internal engine failure. Inspect and repair engine as required.

        Objects left in intake system. Disassemble and inspect air intake system (this

        group).

        Leaking air intake system. Correct as required (this group).

        Oil and/or Excessive Carbon Internal engine failure. Verified by oil in turbine housing. Correct as required.

        Turbine seal failure. Inspect for excessive heat from overfueling and/or

        restricted air intake.

        Prolonged periods of low rpm engine Ask operator to run engine under load or at a higher

        idling. rpm (see Operator’s Manual).

        Restricted oil drain line. Inspect and clear oil drain line as required.

        EXTERNAL CENTER HOUSING AND JOINT DEFECTS

        Leaks from Casting Defective casting. Replace turbocharger (this group).

        Defective gasket. Verify if leaks are occurring at gasket joints.

        Leaks from Joints Loose attaching screws. Tighten to specifications (this group).

        Defective gasket. Inspect and repair as required.

        INTERNAL CENTER HOUSING DEFECTS

        Excessive Carbon Build-Up in Housing Hot engine shutdown. Review proper operation with operator as shown in

        or on Shaft operator’s manual.

        Excessive operating temperature. Restricted air intake; overfueling or mistimed engine.

        Restricted oil drain line. Inspect and clean oil drain lines as required.

        Operating engine at high speeds and Idle engine for a few minutes to allow oil to reach

        loads immediately after start-up. bearings before applying heavy loads.

        Turbocharger Inspection

        The following inspection procedure is recommended for

        systematic failure analysis of a suspected failed

        turbocharger. This procedure will help to identify when a

        turbocharger has failed, and why it has failed, so the

        primary cause of the failure can be corrected.

        Proper diagnosis of a non-failed turbocharger is important

        for two reasons. First, identification of a non-failed

        turbocharger will lead to further investigation and repair of

        the cause of a performance complaint.

        Second, proper diagnosis eliminates the unnecessary

        expense incurred when a non-failed turbocharger is

        replaced.

        The recommended inspection steps, which are explained

        in detail on following pages, are:

        · Compressor Housing Inlet and Compressor Wheel.

        · Compressor Housing Outlet.

        · Turbine Housing Inlet.

        · Turbine Housing Outlet and Turbine Wheel.

        · External Center Housing and Joints.

        · Perform Axial Bearing End Play Test

        NOTE: To enhance the turbocharger inspection, an

        inspection sheet (Form No. DF-2280 available

        from Distribution Service Center—English only)

        can be used that lists the inspection steps in the

        proper order and shows potential failure modes

        for each step. Check off each step as you

        complete the inspection and record any details or

        problems obtained during inspection. Retain this

        with the work order for future reference.

        Compressor Housing Inlet and Compressor Wheel

        1. Check compressor inlet and compressor wheel (A) for

        foreign object damage.

        NOTE: Foreign object damage may be extensive or

        minor. In either case, the source of the foreign

        object must be found and corrected to eliminate

        further damage.

        2. Mark findings on your checklist and continue the

        inspection.

        A—Compressor Wheel

        NOTE: You will need a good light source for this check.

        3. Check compressor inlet for wheel rub on the housing

        (arrow). Look very closely for any score marks on the

        housing itself and check the tips of the compressor

        wheel blades for damage.

        Compressor Housing Outlet

        1. Check compressor housing outlet (A). The outlet

        should be clean and free of dirt or oil.

        2. Mark it on your checklist if dirt or oil is found and

        continue the inspection.

        A—Compressor Housing Outlet

        Turbine Housing Inlet

        Check the turbine housing inlet ports (arrow) for oil in

        housing, excessive carbon deposit or erosion of center

        walls.

        NOTE: If the inlet is wet with oil, or has excessive carbon

        deposits, an engine problem is likely. Center wall

        erosion (cracking or missing pieces), indicates

        excessive exhaust temperature.

        Turbine Housing Outlet and Turbine Wheel

        1. Use a flashlight to look up inside the turbine housing

        outlet (A) and check blades (B) for foreign object

        damage.

        A—Turbine Housing Outlet

        B—Blades

        2. Inspect the wheel blades and housing for evidence of

        wheel rub (arrow). Wheel rub can bend the tips of the

        blades with the housing showing wear or damage.

        3. Rotate the shaft, using both hands, to check rotation

        and clearance. The shaft should turn freely; however,

        there may be a slight amount of drag.

        IMPORTANT: Use only moderate hand force (3—

        4 pounds) on each end of shaft.

        4. Next, pull up on the compressor end of the shaft and

        press down on the turbine end while rotating shaft.

        Neither the compressor wheel nor the turbine wheel

        should contact the housing at any point.

        NOTE: There will be some “play” because the bearings

        inside the center housing are free floating.

        External Center Housing and Joints

        Visually check the outside of the center housing, all

        connections to the compressor, and turbine housing for

        oil.

        NOTE: If oil is present, make sure it is not coming from a

        leak at the oil supply or return line.

        IMPORTANT: Before you finalize your conclusion that

        the turbocharger has not failed, it is

        strongly recommended that the

        following procedures of checking radial

        bearing clearance and axial bearing

        endplay with a dial indicator be

        performed. These procedures are not

        required if a failure mode has already

        been identified.

        Perform Axial Bearing End Play Test

        This test will give an indication of the condition of the axial

        bearing within the center housing and rotating assembly.

        1. Mount magnetic base dial indicator so that indicator tip

        rests on end of shaft. Preload indicator tip and zero

        dial on indicator.

        2. Move shaft axially back and forth by hand.

        3. Observe and record total dial indicator movement.

        Specification

        Turbocharger

        (AiResearch/Garret)—Axial

        Bearing End Play 0.025—0.102 mm

        (0.001—0.004 in.)

        ..........................................................

        Turbocharger (CZ)—Axial Bearing

        End Play 0.11—0.16 mm

        (0.004—0.006 in.)

        ............................................................................

        Turbocharger (Schwitzer)—Axial

        Bearing End Play 0.064—0.114 mm

        (0.0025—0.0045 in.)

        ..........................................................

        Turbocharger

        (BorgWarner/Schwitzer)—Axial

        Bearing End Play ..................................... 0.14 mm (0.0055 in.) Maximum

        If bearing end play is not within specification, replace

        turbocharger.

        4. Next, check shaft endplay by moving the shaft back

        and forth (white arrows) while rotating. There will be

        some endplay but not to the extent that the wheels

        contact the housings.

        NOTE: These diagnostic procedures will allow you to

        determine the condition of the turbocharger. If the

        turbocharger has failed, analysis of your

        inspection notes should direct you to the specific

        areas of the engine to correct the problems

        causing the turbocharger failure. See

        TURBOCHARGER FAILURE ANALYSIS outlined

        earlier in this group. It is not unusual to find that a

        turbocharger has not failed. If your turbocharger

        passes all the inspections, the problem lies

        somewhere else.

        Perform Radial Bearing Clearance Test

        This test will give an indication of the condition of the

        radial bearings within the center housing and rotating

        assembly.

        NOTE: Prelube center housing bearings prior to

        performing radial clearance test. (See PRELUBE

        TURBOCHARGER, later in this group.)

        AiResearch/Garret Turbocharger

        1. Position dial indicator with extension adapter onto

        center housing so that tip rests on shaft extending

        through oil return cavity.

        IMPORTANT: Use only moderate force (3—4 lb) on

        each end of the shaft when checking

        clearance.

        2. Grasp rotating shaft at both ends and move the shaft

        toward the indicator then away from the indicator

        (arrows) by applying moderate force of 3—4 lb.

        3. Observe and record total indicator movement.

        Specification

        Bearing Clearance............................... 0.08—0.18 mm (0.003—0.007 in.)

        4. If total indicator reading is not within specification,

        replace turbocharger.

        BorgWarner/Schwitzer and CZ Turbochargers

        1. Remove compressor cover.

        2. Install a dial indicator against end of shaft as shown.

        3. Move shaft alternately toward and away from indicator

        and record total travel. Compare reading with the

        following specification.

        Specification

        Turbocharger (CZ)—Radial

        Bearing Clearance............................... 0.37—0.46 mm (0.015—0.018 in.)

        Turbocharger

        (BorgWarner/Schwitzer)—Radial

        Bearing Clearance.................................... 0.51 mm (0.0200 in.) Maximum

        4. If total indicator reading is not within specification,

        replace turbocharger.

        5. Install compressor cover.

        Adjust Turbocharger Wastegate Actuator (If

        Equipped)

        A—Jam Nut

        B—Rod End

        C—Retainer Clip

        D—Bypass Lever

        1. Loosen jam nut (A).

        2. Disconnect hose and pressurize actuator to 83 kPa

        (.83 bar) (12 psi) and hold at this calibration pressure.

        3. Push bypass lever (D) as far as possible toward the

        actuator and apply pressure to keep lever in that

        position.

        IMPORTANT: Twisting or forcing the entire rod in or

        out will change the calibration, causing

        damage to engine from overboost.

        4. Turn rod end (B) in either direction until rod eye can

        just be slipped over bypass lever pin. Loosen rod end

        an additional half turn, install onto pin and secure with

        retainer clip (C). Release pressure on actuator.

        5. Pressurize the actuator to 83 kPa (.83 bar) (12 psi).

        Measure the end play with a dial indicator, moving the

        bypass assembly back and forth in a direction

        perpendicular to the actuator rod. End play should be

        within specifications listed. If necessary to adjust, set

        end play at 0.38 mm (0.015 in.)

        Specification

        Turbocharger—Actuator End Play 0.05—0.056 mm

        (0.002—0.022 in.)

        ...................................

        6. Vary the pressure from 62—83 kPa (.62—.83 bar) (9—

        12 psi) a few times to verify smooth and free operation

        of the bypass assembly.

        7. Attach hose to actuator and secure with hose clamp.

        Repair Turbocharger

        Turbochargers used on the engines covered in this

        manual are available through service parts as a complete

        remanufactured assembly only. Individual components for

        repair are not available.

        Prelube Turbocharger

        IMPORTANT: DO NOT spin the rotor assembly with

        compressed air. Damage to bearings

        can occur when using compressed air.

        Fill oil inlet or drain port with clean engine oil and spin

        rotating assembly (by hand) to properly lubricate bearings.

        If turbocharger is to be stored for an extended period of

        time, lubricate internally and install protective covers on all

        openings.

        John Deere約翰迪爾強鹿柴油機安裝渦輪增壓器

        IMPORTANT: If turbocharger failed because of foreign

        material entering the air intake system,

        be sure to examine the system and

        clean as required to prevent a repeat

        failure.

        If not done previously, prime (prelube) the turbocharger

        rotating assembly prior to mounting turbocharger on

        engine. Prelube center housing with clean engine oil

        through the oil drain hole. Turn rotating assembly by hand

        to lubricate bearings.

        IMPORTANT: Turbochargers can be either single or

        dual entry. Make sure the appropriate

        single or dual gasket is used when

        installing turbocharger.

        1. Position turbocharger (D) and new stainless steel

        gasket onto exhaust manifold. Tighten stud nuts to

        specifications.

        Specification

        Turbocharger-to-Exhaust Manifold

        Nuts—Torque .................................................................. 70 N•m (52 lb-ft)

        2. Install oil return pipe (C) to turbocharger. Tighten oil

        return pipe cap screws to specifications.

        Specification

        Turbocharger Oil Return Pipe

        Cap Screws—Torque ...................................................... 24 N•m (18 lb-ft)

        3. Connect turbocharger oil inlet line (B) and tighten to

        specifications.

        Specification

        Turbocharger Oil Inlet Line (At

        Turbocharger)—Torque................................................... 24 N•m (18 lb-ft)

        Turbocharger Oil Inlet Line (At Oil

        Filter Header)—Torque.................................................... 24 N•m (18 lb-ft)

        4. Connect air inlet hose-to-turbocharger compressor

        housing. Tighten hose clamp (A) on air inlet line to

        specifications.

        Specification

        Turbocharger Air Inlet Hose

        Clamp—Torque ................................................ 6 N•m (4.5 lb-ft) (54 lb-in.)

        IMPORTANT: Since the greatest suction force occurs

        between air cleaner and turbocharger,

        ensure that hose connections are tight

        to prevent entry of dirt into system.

        5. Install exhaust adapter and exhaust elbow. Tighten cap

        screws and clamp to specifications.

        Specification

        Exhaust Adapter-to-Turbocharger

        Clamp—Torque ............................................. 7.5 N•m (5.5 lb-ft) (66 lb-in.)

        Turbocharger Exhaust Elbow—

        Torque ............................................................................. 47 N•m (35 lb-ft)

        Turbocharger Break-In

        IMPORTANT: A new or repaired turbocharger DOES

        NOT have an adequate oil supply for

        immediate start-up of engine. Perform

        the steps below to prevent damage to

        turbocharger bearings.

        1. Either push the throttle lever to the “STOP” position,

        hold the engine shut-off knob out, or disconnect

        electrical wire from injection pump.

        IMPORTANT: DO NOT crank engine longer than 30

        seconds at a time to avoid damage to

        starter motor.

        2. Crank engine over with starter motor until oil pressure

        gauge needle registers within the “GREEN” zone of

        pressure gauge.

        3. Start and run engine at low idle while checking oil inlet

        and air piping connections for leaks.

        Recommendations for Turbocharger Use

        IMPORTANT: Should the engine stall when operating

        under load, IMMEDIATELY restart the

        engine to prevent overheating of

        turbocharger parts.

        In most cases, turbocharger damage is caused by

        improper start-up and shutdown procedures. Always idle

        the engine for at least 30 seconds (no load) after start-up

        and before shutdown.

        John Deere約翰迪爾強鹿柴油機拆卸,檢查和安裝排氣

        1. Remove turbocharger (if equipped), exhaust elbow, or

        exhaust pipe if desired. Turbocharger can be removed

        with exhaust manifold (A). (See REMOVE

        TURBOCHARGER, earlier in this group.)

        2. Remove exhaust manifold. Two-Valve head have guide

        studs (C) to aid in removal.

        NOTE: Some engines are assembled with sealant in

        production. Replace with gaskets when servicing.

        Some exhaust manifolds are equipped with a

        one-piece gasket.

        3. Remove gasket(s) (B) if equipped.

        4. Remove exhaust port sleeves on four-valve head.

        5. Inspect sleeves for cracks or wear. Replace as

        needed.

        6. Clean mating surfaces of cylinder head and exhaust

        manifold with cleaning solvent, acetone, or any other

        suitable cleaner that will remove sealant, if previously

        applied. (Brake Kleen, Ignition Cleaner and Drier are

        examples of commercially available solvents that will

        remove sealant from flange.) Thoroughly clean

        passages in exhaust manifold.

        7. Inspect each exhaust manifold for cracks or damage.

        Inspect machined mounting surfaces for burrs or other

        defects which might prevent gasket(s) from sealing

        properly. Replace parts as needed.

        8. Install gasket(s) (B) on exhaust manifold.

        NOTE: Stainless steel gaskets can be reused if not

        damaged. Graphite gaskets must be replaced.

        9. Install exhaust port sleeves for four-valve head.

        A—Exhaust Manifold

        B—Gasket

        C—Guide Studs

        D—Exhaust Port Sleeve

        10. Install exhaust manifold. Use guide studs (C) if

        equipped.

        11. Apply PT569 NEVER-SEEZâ Compound to cap

        screws.

        12. Tighten exhaust manifold-to-cylinder head cap screws

        to specifications. On 6-cylinder engines, tighten cap

        screws on No. 3 and No. 4 cylinders first. On

        4-cylinder engines, tighten No. 2 and No. 3

        cylinders first.

        Specification

        Exhaust Manifold-to-Cylinder

        Head Cap Screws—Torque ........................................... 70 N•m (52 lb-ft)

        Remove and Install Air-to-Air Aftercooler

        Refer to machine technical manual for removal,

        inspection, and installation procedures.

        Remove and Install Air Intake Pipe

        NOTE: Configuration of air intake pipe varies by

        application. Engines may also be equipped with

        an air heater or spacer between intake pipe and

        manifold. (See REMOVE AND INSTALL AIR

        HEATER next in this group.)

        1. If required, disconnect start aid lines or wiring.

        2. Remove cap screws (B).

        3. Loosen hose clamp (A) and remove air intake pipe.

        4. Inspect and repair as required.

        5. Install new gasket and air intake pipe. Tighten cap

        screws to specifications.

        Specification

        Air Intake Pipe-to-Cylinder

        Head—Torque ................................................................. 70 N•m (52 lb-ft)

        6. Tighten hose clamp (A) to specifications.

        Specification

        Air Intake Pipe Hose Clamp—

        Torque .............................................................. 6 N•m (4.5 lb-ft) (54 lb-in.)

        7. If required, connect start aid lines or wiring.

        John Deere約翰迪爾強鹿柴油機拆卸、檢查和安裝進氣歧管

        NOTE: position of fuel filters vary by engine type and

        engine application.

        1. Remove fuel line (A).

        2. Remove two cap screws (B) and remove prefilter (C).

        3. Remove twelve cap screws (D) and remove intake

        manifold (E).

        4. Inspect for cracks or damage. Inspect machined

        mounting surfaces for burrs or other defects which

        might prevent gasket from sealing properly.

        5. Install new gasket and install intake manifold. Tighten

        cap screws to specification.

        Specification

        Intake Manifold Cap Screws—

        Torque ............................................................................. 73 N•m (54 lb-ft)

        6. Install prefilter.

        拆卸和安裝空氣加熱器

        NOTE: Figure shows two types of air heaters. One or the

        other is used per application.

        On later model grid-type air heaters, gasket (B) is

        replaced by an O-ring, eliminating the need for

        ground wire shown.

        1. Disconnect wiring, if required.

        2. If machine is equipped with grid-type air heater (A),

        remove air intake pipe. (See REMOVE AND INSTALL

        AIR INTAKE PIPE in this group.)

        3. Remove air heater (A) or (C).

        4. Replace parts as required.

        5. If equipped with grid-type air heater, install air heater

        (A) with new gasket (B) or O-ring.

        Coat threads of air heater (C) with LOCTITEâ 592 Pipe

        Sealant with TEFLONâ and install.

        6. Install air intake pipe if required.

        7. Connect wiring, if required.

        拆卸和安裝起動輔助裝置(如果裝備)

        1. Disconnect starting aid tube (1).

        NOTE: When removing nozzle, note the location of red

        dot (2) when removing.

        2. Remove nozzle holder from air inlet.

        3. Clean or replace nozzle holder as required.

        4. If removed, install adapter into air inlet tube and torque

        to specifications.

        Specification

        Adapter-to-Air Inlet Tube—Torque.................................. 50 N•m (37 lb-ft)

        NOTE: Red dot (2) on nozzle holder must be installed at

        the 12 o’clock position, facing the incoming air

        flow. Nozzle orifice (3) needs to be in the path of

        the air flow to disperse fluid for quick start of

        engine.

        5. Install nozzle and connect starting aid tube.

        1—Starting Aid Tube Nozzle Holder

        2—Red Dot for Nozzle Installation

        3—Orifice

        首頁 | 產品展示 | 公司介紹 | 客戶服務 | 技術中心 | 配件中心 | 維修中心 | 聯系我們 所有 湖南英珀威機械有限公司

        www.nopqrs.com 公司地址:長沙市雨花區洞井街道中海瓏悅府1棟1401備案號: 湘ICP備18016793號-2

        經營范圍:湖南,長沙發電機、發電機組維修,出租。銷售珀金斯發電機,柴油發電機,發電機組零配件等。
        久久福利网站免费视频_欧美精品免费一级高清_91午夜福利国产在线_毛片国产一级毛片中文在线

        <output id="0zrjl"><em id="0zrjl"></em></output>
        1. <tr id="0zrjl"></tr>
          <table id="0zrjl"><noscript id="0zrjl"></noscript></table>

            <p id="0zrjl"><strong id="0zrjl"></strong></p>