How to Disassembly yanmar Diesel Engine Governor

 

 This article mainly introduces  yanmar marine diesel engine Governor disassembly

For Yanmar Diesel Engine Agriculture Excavator Tractor Marine Generator Diagnostic tool

(1)  Remove the governor case.

NOTE: Loosen the hex bolt on models with an angleich spring.

(2) Remove the control lever hex nut, and pulil out the con-
    trol lever from the control lever shaft.

(3) Remove the governor case bolt. Remove the governor case(parallel pin) from the fuel pump until while lightly tapping the governor case with a wooden hammer.
    Create a gap between the governor case and fuel pump by moving parts of the governor lever.

(4) Pull out the governor link snap pin by inserting needle nosed pliers between the fuel pump and governor case.
case.

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(5) The governor and fuel pump come apart by sliding the governor case and fuel pump apart and pulling out the link pin of the fuel control rack.

(6) Remove the stop lever return spring from the governor lever shaft.

(7) Use needle nose pliers to unhook the governor spring from the tension lever and control lever shaft.

(8) Remove the snap-rings on both ends of the governor lever shaft.

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(9) Put a rod 8mm (0.3150in.) in dia. or less in one end of the governor lever shaft, and tap the governor shaft until the O-ring comes out the other side of the governor case.

(10) Atter removing the O-ring. lightly tap the end of the shaft that you removed the O-ring from, and removethe governor lever shaft. Then remove the governor shaft assembly and washer.

(11) Remove the governor link from the governor lever.

NOTE: The governor assembly consists of the governor lever, tension bar, bushing, throttle spring and shifter, and is normally not disassembled.
The spring pin is removed when you replace the shifter or throtle spring.
(12) When you need to pull out the stop lever, remove thestop lever shaft stop pin, and lightly tap the inside of the governor case.

(13) When you need to pull out the control lever shaft, tap the end of the shaft with a wood hammer.

NOTE:1.Do not remove the fuel limit nut from the governor case unless necessary.

(14) Pulil out the governor sleeve on the end of the fuel camshaft by hand.

(15) Turn the governor weight with a box spanner two or three times to loosen it, stopping it with the hole inthe fuel coupling ring or holding the coupling with a vise.

NOTE:When the taper lit comes apart after you have removed the nut，the governor weight may lly out一Be Careful.

(16) Remove the governor weight assembly from the fuel pump cam using the governor weight puling tools.

NOTE: The governor weight assembly is made up ol the governor weight, support and pin. Do not dis.
assemble.
Printed in Japan A0A 1015-9110SP

Inspection and Adjustment of Kubota Engine Pressure, Top Clearance, and Valve Clearance

     Inspection and Adjustment of  Kubota BX25, RCK54(P)-23BX, RCK60B-23BX, LA240, Engine Pressure, Top Clearance, and Valve Clearance

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Compression Pressure(by Glow Plug Hole Adaptor Setting)
1. Run the engine until it is warmed up.
2. Stop the engine.
3. Remove the air cleaner, the muffler, the breather tube, the head cover and all glow plugs.
4. Set a compression tester(Code No.07909-30208) with the adaptor(Adaptor L, code No.07909-31301) to the glow plug hole.
5. After making sure that the stop lever is set at the stop position
   (non-injection), run the engine with the starter and measure the compression pressure.
6. Repeat steps 4 and 5 for each cylinder.
7. If the measurement is below the allowable limit, apply a small amount of oil to the cylinder wall through the glow plug hole(or nozzle hole) and measure the compression pressure again.
8. If the compression pressure is still less than the allowable limit, check the top clearance, valve clearance and cylinder head.
9. If the compression pressure increases after applying oil, check the cylinder wall and piston rings.
   NOTE
· Check the compression pressure with the specified valve clearance.
· Always use a fully charged battery for performing this test.
· Variances in cylinder compression values should be under
   10%.

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Top Clearance
1. Remove the cylinder head.(Do not attempt to remove the cylinder head gasket.)
2. Move the piston up and stick a strip of fuse [1.5 mm dia.(0.059
in. dia.),5 to 7 mm long (0.197 to 0.276 in. long)] on the piston head at three positions with grease so as to avoid the intake and exhaust valves and the combustion chamber ports.
3. Lower the piston, and install the cylinder head and tighten the cylinder head screws to the specified torque.
4. Turn the flywheel until the piston exceeds top dead center.
5. Remove the cylinder head, and measure the thickness of the squeezed fuses.
6. If the measurement is not within the factory specifications, check the oil clearance between the crankpin and crankpin bearing and between the piston pin and small end bushing.
   DNOTE
· After checking the top clearance, be sure to assemble the cylinder head with a new cylinder head gasket.

Checking Valve Clearance IMPORTANT
· Valve clearance must be checked and adjusted when engine is cold.
1. Remove the cylinder head cover and the glow plugs.
2. Align the"1TC"mark(1) on the flywheel and alignment mark(2)
on the rear end plate so that the No.1 piston comes to the compression top dead center.
3. Check the following valve clearance marked with "*"using a feeler gauge.
4. If the clearance is not within the factory specifications, adjust with the adjusting screw.
5. Then turm the flywheel 6.28 rad(360"), and align the "1TC"mark
(1) on the flywheel and alignment mark (3) on the rear end plate so that the No.1 piston comes to the overlap position.
6. Check the following valve clearance marked with "*"using a feeler gauge.
7. If the clearance is not within the factory specifications, adjust with the adjusting screw.

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 NOTE:
· The sequence of cylinder numbers is given as No.1, No.2
and No.3 starting from the gear case side.
· After adjusting the valve clearance, secure the adjusting screw with the lock nut.
(1)"1TC"MarkA: Gear Case Side
(2) Alignment Mark

Doosan DL220 Refrigerant Safe Handling Procedures Guide

                 This article mainly introduces Doosan DL220 Refrigerant Safe Handling Procedures

Doosan DMS-5 (Doosan Data Monitoring System) Diagnostic Software V1.6.3

The following procedures should be observed for safe handing of refrigerant during vacuum and charging process.
1.Use an approved recovery / charging device which can safely perform vacuum and charge work simultaneously.

2.The new refrigerant has improved cooling characteristics than the old type and care should be used not to overcharge the system.

3. Do not over tighten connections when working on refrigerant system.

4. The new refrigerant system standards require new tools, equipment and parts. Do not attempt to use equipment use in servicing the old refrigerant system.

5. The new refrigerant oil (PAG type) has a high moisture absorption characteristic. When the refrigerant system vacuum seal has been broken, immediately plug up allopenings to prevent moisture from entering into the system.

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6. When joining unions which use O-ring seals, lightly coat O-rings with refrigerant oil. Be careful not to drip oil on the threads of the nut.

7. Be certain the O-rings are seated properly on the refrigerant line lip. Always use new O-rings when reassembling parts. Do not reuse old O-rings.

8. Use a vacuum pump to evacuate refrigerant system of air.

9. When charging the refrigerant system with the engine running, do not open the high-pressure valve on the manifold gauge as the reverse flow of high-pressure refrigerant will rupture the hose.

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10. When releasing the high-pressure hose after completing the charging process, quickly disconnect the hose to minimize refrigerant released to the air.

Kubota U10 U20 Excavator Accelerator Bar Adjustment Guide

 

This instruction shows you how to adjust the accelerator lever for Kubota U10 U20 excavators. 

 

 
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 step:  

Adjusting Maximum Speed Make sure the engine governor lever is in the maximum speed position. With the lever in the MAX position, lock the bolt by turning the adjustment bolt until it makes light contact with the accelerator lever (see Section A). 

 Defect: Improper adjustment may damage the acceleration line.

 

  Adjusting Idle Speed Tilt the accelerator lever fully forward, making sure the accelerator line is free. Defect: Poor adjustment, may cause poor idle speed. 

 

   

 
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 Set the operating force of the accelerator lever to 20～30N·m(2～3kgf-m). Disadvantage: The handling force is too strong, and it may be difficult to obtain acceleration. Too weak operating force may result in a drop in rotational speed. Follow the route through the acceleration line as shown on the left. Tighten the clamp. 

 Defect: Wrong wiring that can cause wires to get stuck or damaged. 

 

 

 Connect the accelerator wire to the engine inside the governor rod. (See below.) 

 Defect: Incorrect connection, could cause the accelerator lever to move too wide and hit the leg.

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Perkins Engine Exhaust Gas Valve (NRS) -Assemble Guide

      This article mainly introduces Perkins 2806F Engine Exhaust Gas Valve (NRS) -Assemble guide

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1. Ensure that all components are clean and free from wear and damage. If necessary, replace any components that are worn or damaged.

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2. Place valve housing(11) into a suitable support.

3. Install a new O-ring(10) to valve housing (11).

   Ensure that the O-ring seals are correctly installed into the recesses of the valve housing.
4. FilCavity(B) with Tooling(A). Cavity(B) is found on the valve housing(11).

5. Installactuator assembly(6) to valve housing(11).

   Ensure that the actuator assembly is correctlyseated and correctly orientated onto the valve housing.

6. Install Allen head bolts and washers(3). Tighten Allen head bolts to a torque of 28 N·m (248 lb in).

7. Install O-ring(13),O-ring(14),O-rings(15), and
   (16) to valve assembly(7).

8. Installvalve assembly (7) to actuator assembly(6).
   Tighten the valve assembly to a torque of 50 Nm
   (37 Ib ft).

9. Install solenoid (8) to valve assembly(7). Ensurethat the solenoid is correctly orientated. Install washer(9) and nut(9a). Tighten the nut toa torque of 20N-m(177 lb in).

10. If necessary, install temperature sensor (12) to valve housing(1). Refer to Disassembly and Assembly, Temperature Sensor(Cooled Exhaust Gas)-Remove and Install for the correct procedure.

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11. Install a new O-ring seal (2) to adapter(1). Install the adapter to actuator assembly (6). Tighten the adapter to a torque of 20 N-m (15 Ib ft).

12. Install a new O-ring seal(5) to adapter(4). Install the adapter to actuator assembly (6). Tighten the adapter to a torque of 20 N-m(15 b ft).

How to Dismantling Volvo_Penta_Md2040 Cylinder Head

    This article mainly introduces  volvo_penta_md2040 Cylinder head Dismantling 

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1. Remove both battery leads. Close the fuel cocks.
2. Close the bottom valve and drain off the water in the sea and fresh water system.
3. Release the hose to the heat exchanger from the sea water pump. Release the  exhaust pipe from the exhaust hook.
4. Release the thick rubber hose under the heat ex-
   changer.(Note: the hose is filled with refrigerant).
   Release the thin hose from the refrigerant pump.
5. MD2010, MD2020remove the drive belt for the al-
   ternator/refrigerant pump. Remove the altemator and clamp.
6. Release the relay box from the heat exchanger housing and hang it up.
7. Release the electric cables to the oil pressure relay and to the refrigerant temperature relay and sensor where appropriate).
8. MD2040 remove the cover at the front on the heat exchanger housing's right-hand side. Remove the spacer ring, themostat and rubber seal.

9. Remove the expansion tank complete with heat ex-
   changer.
   MD2010, MD2020: Remove the spring, themostat and rubber seal from the heat exchanger housing.
10. MD2010, MD2020, MD2030: Remove the induction manifold.
   MD2040: Remove the inlet pipe complete with air filter.
11. Release the delivery pipe at the injection pump and injectors. Lift off the delivery pipes together.
   Protect the connections from impurities.

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12. Remove the nut at the top of respective injectors and lift off the fuel leak pipe.
13. Unscrew the injectors. Use a long socket,80 mm.
    MD2010, MD2020, MD2030=22mm MD2040=27mm.
    Remove the copper gaskets under the injectors.
    MD2030 Remove the heat shields (3, Fig.10).
    MD2010, MD2020, MD2030: Remove the inserts
    (4) and the lower copper washers.
14. Release the electric cable to the glow plug. Re-move the conductor rail and   unscrew the glow plug.

Fig.11. Dismantling of circulation pump

15. MD2010, MD2020, MD2030Remove the circula-
     tion pump.
    MD2030: Note. The pump must be released/re-
    moved before the cylinder head is released. Thepump can otherwise be broken. Remove the spring and thermostat.

 Fig.12. Dismantling of oil pressure pipe(cylinder block-cylinder head/rocker mechanism)

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16. Remove the oil pressure pipe between the cylinder block and cylinder head(rocker mechanism on MD2040).
17. Remove the valve cover (built together with the in-
    let pipe on MD2010, MD2020 and MD2030).

 Fig.13. Dismanting of rocker mechanism(MD2040)

1. Rocker mechanism 3. Valve caps
2. Pull rods
18. Release the nuts from the rockers' bearing brack-
   ets. Remove the rocker mechanism(1, Fig.13) andpull rods(2). Remove the valve caps(3, MD2040)
   from the valve stem.
19. Release the cylinder head screws in several sta-
   ges.
   Note: Begin in the middle of the cylinder head and release the screws in a circle outwards.
   Lift off the cylinder head.

Perkins 2806F Engine Exhaust Gas Valve(NRS)-Disassemble guide

This article mainly introduces Perkins 2806F Engine Exhaust Gas Valve(NRS)-Disassemble guide

Perkins SPI2 VERSION 2018A Service & Parts CATALOGUE SOFTWARE

 

 

 

Disassembly Procedure Stat By: a. Remove the NOx Reduction System Exhaust Gas Valve(NRS). Refer to Disassembly andAssembly,"Exhaust Gas Valve(NRS)-Remove and Install"for the correct procedure.

1. Place the assembly of NOx Reduction System Exhaust Gas Valve(NRS) into a suitable support.

2. Remove adapter(1) from actuator assembly(6) for the assembly of NRS exhaust gas valve. Remove O-ring seal(2).

3. Remove adapter(4) from actuator assembly(6) for the assembly of NRS exhaust gas valve. Remove O-ring seal(5).

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4. Remove nut (9a) and washer(9) from solenoid(8).
   Remove the solenoid for valve assembly(7).

5. Remove valve assembly (7) from actuator assembly(6). Remove O-ring(13),O-ring(14),O-
   rings(15), and O-ring(16).

6. If necessary, remove temperature sensor (12) from valve housing(1). Refer to Disassembly and Assembly, Temperature Sensor(Cooled Exhaust Gas)-Remove and Install for the correct procedure.

7. Remove Allen head bolts and washers (3).
   Remove actuator assembly (6) from valve housing
   (11).

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8. Remove O-ring seal(10).