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

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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).

How to Remove Doosan DL22 Cylinder Disassembly

This article mainly introduces Doosan DL22 Cylinders DISASSEMBLY

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NOTE: Keep on hand a container large enough to hold all of the oil in cylinder being repaired. When cylinder rod and head are removed, oil will run out of cylinder.
NOTE: Dispose of drained fuids according to local regulations.
1. Use an allen wrench to remove bolts that hold cylinder head t
o cylinder tube. See Figure 8.

2.Support cylinder rod with a lifting sling.See Figure 9.Side cylinder rod out of cylinder tube.Rotate cylinder rod slightly as it is being pulled from cylinder tube.This will make it easier to pull rod out of tube.

3.Set cylinder rod assembly in a repair fixture and secure rod in place.See Figure 10.Use a power wrench and socket to remove nut that holds piston on rod.

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4.Remove piston nut（1，Figure 11），piston assembly（2），cushion flange（3），and cylinder head assembly（4）.
Reference OGK品答。|escription
1|Piston Nut
2|Piston Assembly
3|Cushion Flange
|Cylinder Head
4
Assembly

5. Do not remove slipper seal, backup ring, and back ring from piston. If these three items are not scratched or damaged. See Figure 12. Once these 3 items are removed from piston, they must be replaced. They cannot be reused. Exercise caution when removing slipper seal to prevent damage to piston O-ring groove. Remove wear rings from piston.

6. When disassembling cylinder head do not remove slipperseal, backup ring, back ring, or dust seal unless items are scratched or damaged. If seals are removed from head, they must be replaced. They cannot be reused. Remove retaining ring,(1, Figure 13). Use a screwdriver to remove dust seal(2) from head.

7. Use caution to prevent damage to any parts of U-packing

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(1, Figure 14). Remove U-packing(1). Remove O-ring(2), and ring(3)

Introduces YANMAR maring diesel engine 3JH2 Series Governor disassembly

This article mainly introduces YANMAR maring diesel engine 3JH2 Series Governor disassembly

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NOTE: Loosen the hex bolt on models with an angleich spring.
(2) Remove the control lever hex nut, and pul 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.

(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.

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(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.

(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 govermor 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.

 

 
(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.

(14) Pull 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.

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

NOTE: The governor weight assembly is made up of the governor weight, support and pin. Do not dis.
assemble.

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Introduces Installation Perkins 2806F Engine Procedure

   This article mainly introduces Installation Perkins 2806F Engine Procedure

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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.

2. Ifnecessary, follow Step 2.a through Step 2.g to install bracket(34) for the NRS exhaust gas valve from the cylinder head.

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3. Install NRS exhaust gas valve(12) to hose assembly(9). Loosely install bolts (11) to the NRS exhaust gas valve.
4. Install a new V-band clamp (15) onto NRS exhaust gas valve(12). Ensure that the V-band clamp is correctly orientated.

5. Install venturi tube assembly(16) onto NRS exhaust gas valve(12). Ensure that the V-band clamp is correctly seated onto the venturi tube assembly and the NRS exhaust gas valve.
 Tighten V-band clamp finger tight.
6. Install new O-ring seals (17)(not shown) to tube assembly(20). Apply Tooling(A) to the O-ring seals and the bore of venturi tube assembly(16).
7. Install a new V-band clamp(24) onto the NRS exhaust cooler. Ensure that the V-band clamp is correctly orientated.
8. Install tube assembly(20) into venturitube assembly(16). Ensure that the tube assembly is correctly installed into venturi tube assembly.
 Ensure that V-band clamp (24) is correctly seated onto the NRS exhaust cooler and the tube assembly.
9. Install spacer blocks(21) between the cylinderblock and tube assembly (20). Install clamp (23)
 and bolts(23). Tighten the bolts hand tight.
 Note: Ensure that the spacer blocks as correctly positioned and orientated.
10. Install clamp(18) and bolt(19) for tube assembly
(20).
11. Ensure that venturi tube assembly(16), tube assembly(20), and NRS exhaust gas valve(12)
 are correctly aligned before tightening the bolt and the V-band clamps.
12. Instal bolt(14) to clip(13).
13. Tighten bolts(11) to a torque of28N-m
 (248lb in).
14. Tighten hose clamp(8) and hose clamp(10) forhose assembly(9). Tighten the hose clamps to a torque of 7.5Nm (66 lb in).
15. Tighten V-band clamp(15) and V-band clamp
 (24) to a torque of 12N-m(106 lb in).
16. Tighten bolts(22) to a torque of25N-m
 (221lb in).
17. Tighten bolt(19) to a torque of25 N-m(221 lb in)18. Tighten bolt(14) to a torque of 25N-m(221 lb in)

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19. Connect harness assembly(6) and harness assembly (7) to the engine harness assembly.
20. Install new cable straps (5) to harness assembly
(6) and harness assembly(7). Ensure that all cable straps are installed to the harness assemblies.
Note: Ensure that the cable straps meet Original Equipment Manufacturer (OEM) specifications.
21. Install a new O-ring seal (2)(not shown) to the adapter. Ensure that the O-ring seal is correctly into the recess of the adapter.
22. Connect hose assembly(1). Tighten the hose assembly to a torque of 45 N·m (33 lb   ft). Use a suitable tool hold the adapter as the hose assembly is tightened. Ensure that the adapter is not strained as the hose assembly is tightened.
23. Install a new O-ring seal(4)(not shown) to theadapter. Ensure that the O-ring seal is correctly into the recess of the adapter.