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        當前位置:首頁 -> 產品展示->產品展示>約翰迪爾強鹿柴油機冷卻、進氣、排氣系統的檢測



        John Deere約翰迪爾強鹿柴油機冷卻、進氣、排氣系統的檢測

        1. Remove trash that has accumulated on or near


        2. Visually inspect entire cooling system and all

        components for leaks or damage. Repair or replace as


        3. Inspect radiator hoses for signs of leakage or rot.

        Replace hoses as necessary.

        4. Inspect the coolant pump weep hole (A) for any


        5. Insert a heavy gauge wire deep into weep hole to

        make sure hole is open.

        A—Weep Holes

        CAUTION: Do not drain coolant until it has

        cooled below operating temperature. Always

        loosen block drain valve slowly to relieve any

        excess pressure.

        6. Remove and check thermostat(s) (B). (See TEST

        THERMOSTATS in Section 02, Group 070.)

        IMPORTANT: Whenever the aluminum timing gear

        cover or coolant pump are replaced, the

        radiator should be completely drained

        by opening the radiator petcock and

        removing the lower radiator hose.

        Engines are now serviced with a

        coolant pump insert to decrease

        cavitation. When removing the coolant

        pump, inspect the coolant pump cavity

        in the timing gear cover for excessive

        cavitation. If engine has no coolant

        pump insert, install coolant pump

        insert. (See INSTALL COOLANT PUMP

        in Group 070.)

        7. Drain coolant at drain valve (C) and flush cooling

        system. (See FLUSH AND SERVICE COOLING

        SYSTEM in Section 01, Group 002.)

        IMPORTANT: Air must be expelled from cooling

        system when system is refilled. Loosen

        temperature sending unit fitting at rear

        of cylinder head or plug in thermostat

        housing (A) to allow air to escape when

        filling system. Retighten fitting or plug

        when all the air has been expelled.

        8. Fill cooling system with recommended concentration of

        coolant, clean soft water, and inhibitors. (See DIESEL

        ENGINE COOLANT in Section 01, Group 002.)

        9. Run engine until it reaches operating temperature.

        Check entire cooling system for leaks.

        A—Thermostat Housing


        C—Drain Valve

        10. After engine cools, check coolant level.

        NOTE: Coolant level should be even with bottom of

        radiator filler neck.

        11. Check system for holding pressure. (See PRESSURE


        this group.)

        John Deere約翰迪爾強鹿柴油機進氣系統的檢查

        1. Replace air cleaner primary filter element (B). Replace

        secondary element (A) if primary element has holes in


        2. Check condition of air intake hose(s) (C). Replace

        hoses that are cracked, split, or otherwise in poor


        3. Check hose clamps (D) for tightness. Replace clamps

        that cannot be properly tightened. This will help

        prevent dust from entering the air intake system which

        could cause serious engine damage.

        A—Secondary Filter Element

        B—Primary Filter Element

        C—Air Intake Hose(s)

        D—Hose Clamps

        Measure Intake Manifold Pressure

        (Turbocharger Boost/Power Check)

        This test of turbocharger boost is also a good indicator of

        whether the engine is performing at full rated power.

        IMPORTANT: If testing the engine with the air filter

        system removed, install JDG576

        Turbocharger Shield to inlet of


        NOTE: On “H” engines, pressure reading should be taken

        at intake manifold after the aftercooler.

        1. Disconnect line (A) from intake manifold and install the

        appropriate fitting from JDE147 Manifold Pressure Test

        Kit or FKM10002 Universal Pressure Test Kit.

        Additional adapter fittings may be needed: M10 x 1

        and M14 x 1.5.

        Connect gauge (B) and hose assembly to fitting. Be

        sure all connections are tight.

        IMPORTANT: Engine speed and load should be

        stabilized before taking a gauge

        reading. Be sure that gauge works

        properly and familiarize yourself with

        the use of the gauge.

        Turbo-boost pressure checks are only a

        guide to determine if there is an engine

        problem (valve leakage, faulty nozzles,

        etc.). Low pressure readings are not a

        conclusive reason for increasing

        injection pump fuel delivery. Pump

        adjustment should be within

        specifications as established by an

        authorized diesel repair station.

        2. Before checking boost pressure, warm up engine to

        allow the lubricating oil to reach operating temperature.

        IMPORTANT: On some vehicles, it may not be

        possible to meet the turbo boost

        pressure due to inability to get full load

        rated speed. In these cases, see

        Machine Operation and Test Manual for

        the appropriate test method and


        3. Place engine under full load at rated speed to make


        4. Observe pressure reading on gauge. Compare

        readings with charts in Section 06, Group 210. Boost

        pressure should be within ranges shown in charts

        when engine is developing rated power at full load

        rated speed.

        5. If boost pressure is too high, remove fuel injection

        pump and have it checked for high fuel delivery by an

        authorized diesel repair station.

        If boost pressure is too low, check the following:

        · Restricted air filter elements.

        · Restricted fuel filter elements.

        · Incorrect fast idle adjustment.

        · Incorrect injection pump timing.

        · Exhaust manifold leaks.

        · Intake manifold leaks.

        · Faulty fuel transfer pump.

        · Low compression pressure.

        · Faulty fuel injection nozzles.

        · Carbon build-up in turbocharger.

        · Turbocharger compressor or turbine wheel rubbing


        · Low fuel injection pump fuel delivery.

        · Restricted exhaust.

        6. After completing test, remove test equipment and fitting

        and reconnect line to intake manifold. Tighten securely.

        John Deere約翰迪爾強鹿柴油機檢查進氣和排氣限制

        A—Exhaust Piping C—Rain Cap E—Elbow F—Connection

        B—Muffler D—Intake Piping

        Low power, low boost pressure, and excessive black

        exhaust smoke can be caused by an intake air or

        exhaust restriction.

        1. Inspect the exhaust piping (A), the muffler (B), and

        the rain cap (C) for damage or any possible


        2. Inspect the intake piping (D), any elbows (E), and

        any connections (F). Look for collapsed pipes,

        dented pipes and loose connections. Replace

        components as needed.

        John Deere約翰迪爾強鹿柴油機進氣泄漏試驗

        Loose connections or cracks in the suction side of the air

        intake pipe can allow debris to be ingested into the engine

        causing rapid wear in the cylinders. Additionally, on

        turbocharged engines, compressor damage may occur

        and cause an imbalance resulting in bearing failure.

        Air leaking from loose connections or cracks on the

        pressure side of the turbocharger can cause excessive

        smoke and low power.

        NOTE: The following test procedure requires that the air

        intake be sealed off to pressurize the system.

        Using a plastic bag to seal the air intake filter is

        used as an example.

        CAUTION: Do not start engine during this test

        procedure. Plastic bag (or whatever

        material/object used to seal intake) can be

        sucked into the engine.

        1. Remove air cleaner cover and main filter element.

        2. Put a plastic bag over secondary filter element and

        install main element and cover.

        3. For two valve head engines, remove plug (B) from

        manifold or disconnect start aid line (A) from crossover

        tube (if equipped).

        4. For four valve head engines, remove air temperature

        sensor (C) from manifold.

        5. Using a adapter, connect a regulated air source.

        6. Pressurize air intake system to 13.8—20.7 kPa

        (0.13-0.21 bar) (2—3 psi).

        7. Spray soap and water solution over all connections

        from the air cleaner to the turbocharger or air inlet to

        check for leaks. Repair all leaks.

        8. Remove plastic bag from filter element and reinstall

        element and cover.

        John Deere約翰迪爾強鹿柴油機檢查排氣漏氣(渦輪增壓)

        Exhaust leaks, upstream of the turbocharger, will cause

        the turbocharger turbine to rotate at a reduced speed

        resulting in low boost pressure, low power, and excessive

        black smoke.

        IMPORTANT: Avoid engine damage and failure. There

        are two types of gaskets: single entry

        and dual entry. Single entry is

        completely open in the center and dual

        entry has a divider in the center. Do not

        interchange dual and single entry


        Inspect the exhaust manifold gasket (A), the exhaust

        manifold (B), and the turbocharger gasket (C) for damage

        and any signs of leakage. Replace components as


        John Deere約翰迪爾強鹿柴油機OEM發動機技術規格

        General OEM Engine Specifications

        Tier I Engines


        4045DF150 4045TF150 4045TF250 4045HF150 6068DF150 6068TF150 6068TF250 6068HF150 6068HF250

        Number of Cylinders 4 4 4 4 6 6 6 6 6

        Bore 106 mm 106 mm 106 mm 106 mm 106 mm 106 mm 106 mm 106 mm 106 mm

        (4.19 in.) (4.19 in.) (4.19 in.) (4.19 in.) (4.19 in.) (4.19 in.) (4.19 in.) (4.19 in.) (4.19 in.)

        Stroke 127 mm 127 mm 127 mm 127 mm 127 mm 127 mm 127 mm 127 mm 127 mm

        (5.0 in.) (5.0 in.) (5.0 in.) (5.0 in.) (5.0 in.) (5.0 in.) (5.0 in.) (5.0 in.) (5.0 in.)

        Displacement 4.5 L 4.5 L 4.5 L 4.5 L 6.8 L 6.8 L 6.8 L 6.8 L 6.8 L

        (276 cu (276 cu (276 cu (276 cu (414 cu (414 cu (414 cu (414 cu (414 cu

        in.) in.) in.) in.) in.) in.) in.) in.) in.)

        Compression 17.6:1 17.0:1 17.0:1 17.0:1 17.6:1 17.0:1 17.0:1 17.0:1 17.0:1

        Max. Crank Pressure 0.5 kPa 0.5 kPa 0.5 kPa 0.5 kPa 0.5 kPa 0.5 kPa 0.5 kPa 0.5 kPa 0.5 kPa

        (2 H2O) (2 H2O) (2 H2O) (2 H2O) (2 H2O) (2 H2O) 2 H2O) (2 H2O) (2 H2O)

        Governor Regulation 7—10 % 7—10 % 7—10 % 7—10 % 7—10 % 7—10 % 7—10 % 7—10 % 7—10 %


        Governor Regulation 5 % 5 % 5 % 5 % 5 % 5 % 5 % 5 % 5 %


        Oil Pressure Rated 345 kPa 345 kPa 345 kPa 345 kPa 345 kPa 345 kPa 345 kPa 345 kPa 345 kPa

        Speed (50 psi) (50 psi) (50 psi) (50 psi) (50 psi) (50 psi) (50 psi) (50 psi) (50 psi)

        Oil Pressure Low Idle 105 kPa 105 kPa 105 kPa 105 kPa 105 kPa 105 kPa 105 kPa 105 kPa 105 kPa

        (15 psi) (15 psi) (15 psi) (15 psi) (15 psi) (15 psi) (15 psi) (15 psi) (15 psi)

        Length 861.0 mm 861.0 mm 861.0 mm 861.0 mm 1117 mm 1117 mm 1117 mm 1116 mm 1141 mm

        (33.9 in.) (33.9 in.) (33.9 in.) (33.9 in.) (44.0 in.) (44.0 in.) (44.0 in.) (43.9 in.) (44.9 in.)

        Width 598 mm 598 mm 598 mm 598 mm 598 mm 598 mm 598 mm 623 mm 623 mm

        (23.5 in.) (23.5 in.) (23.5 in.) (23.5 in.) (23.5 in.) (23.5 in.) (23.5 in.) (24.5 in.) (24.5 in.)

        Height 854 mm 980 mm 980 mm 980 mm 956 mm 984 mm 984 mm 1009 mm 1009 mm

        (33.6 in.) (38.6 in.) (38.6 in.) (38.6 in.) (37.6 in.) (38.7 in.) (38.7 in.) (39.7 in.) (39.7 in.)

        Weight 387 kg 396 kg 396 kg 396 kg 522 kg 533 kg 533 kg 550 kg 568 kg

        (851 lb) (872 lb) (872 lb) (872 lb) (1149 lb) (1172 lb) (1172 lb) (1210 lb) (1250 lb)

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