How to disassemble the idler gear of 320D2 EXCAVATOR DNP?

                                                                Disassembly steps

 

 Begin:

a. Remove the fuel injection pump gear. See Disassembly and Assembly, "Fuel Pump Gear - Removal". 

 b. Remove the valve cover. See Disassembly and Assembly, "Valve Cover - Removal and Installation". 

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Note: Either of the two tools (A) can be used. Please use the tool most suitable for you. 

 

 Note: Care must be taken to ensure that the fuel pump timing is not altered during the removal of the fuel pump gear. Carefully follow these steps to remove the fuel pump gear.

 

Note: 

Keep all parts clean and free of impurities. Impurities will cause rapid wear and shorten the lifespan of parts.

 

 

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 1. Remove the plug (5) from the cylinder block. Remove the O-ring (4) from the plug (5). 

 

 2. Using tool (A), rotate the crankshaft until piston #1 is at top dead center (TDC) of its compression stroke. Refer to System Operation, Testing and Adjustment, "Finding Piston #1 at TDC". 

 

 3. Install tool (B) into the bore (Y) of the cylinder block. Use tool (B) to lock the crankshaft in place. Note: Do not use excessive force when installing tool (B). Do not use tool (B) to hold the crankshaft in place during repairs. 

 

4. Ensure tool (C) is installed in the bore (X) of the camshaft gear. Use tool (C) to lock the camshaft in place. 

 

 5. Ensure gears (1), (2), and (3) are marked to indicate alignment.

 

 6. Loosen the nuts (7) on all rocker arms (8). Loosen the adjusters (6) on all rocker arms (8) until all valves are fully closed. Note: Failure to fully loosen all adjusters may result in valves contacting the piston.

                               

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 7. Mark the plate (9) to indicate the orientation. Note: Identifying the markings ensures the plate is installed in its original alignment position. 

 8. Remove the bolts (10). 

9. Remove the plate (9). 

 10. Remove the idler gear assembly (3) and the hub (11) from the recess in the front housing. Note: The idler gear must be tilted during disassembly. 

11. Remove the hub (11) from the idler gear (3).

 

How to troubleshoot uncontrolled heat in the cab of a Caterpillar 311B Hydraulic Excavator.

  

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Possible Cause： 

 1 The water valve is installed incorrectly or backwards.

 

 a water valve control, inspect the water valve to ensure it is installed correctly. 

2. Some water valves have

 

 an arrow on the side of the valve body indicating the direction of water flow. Make sure the arrow points 

 

toward the line leading to the heating coil. 

3. If the machine is equipped with a cable-operated water valve,

 

 ensure the cable is not wrapped around the valve or the frame. 

 4. If the machine is equipped with an 

 

electric water valve, ensure the actuator is securely connected to the valve.

 

 

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 Possible Cause 2 

 There is an electrical problem with the control panel. 

 1. Check the control panel to 

 

ensure that power is supplied to the control panel after the machine is started. 

 2. Check that the wiring 

 

harness is connected to the control panel. 

 3. Inspect the wiring harness for any damage or exposed wires.

 

  4. Check the circuit breaker or fuse to ensure that there is no open circuit in the system.

 

 

Possible Cause 3 

The water valve cable or potentiometer is faulty. 

 1. Determine the type of water valve 

 

control used on the machine. 

2. If the water valve has a cable connected, proceed to step 3. If the machine

 

 has a built-in potentiometer, proceed to step 5. 

3. Verify that the cable is connected to the water valve 

 

handle. 

4. Check the water valve to ensure that the water valve is fully open when the temperature control

 

 knob is set to the hottest position. 

5. Verify that the potentiometer is connected to the wiring harness in 

 

the cab instrument panel. 

6. Check the water valve to ensure that the water valve is fully open when the 

 

temperature control knob is set to the hottest position.

 

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Caterpillar 311b excavator Heating System Troubleshooting part 1

 Symptom: When the heater control knob is turned to the hottest position, there is little or no heat flow to the cab.

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 The following problem-solving information is intended for locating and correcting problems in heating systems. Different problems may cause the same or similar system conditions (symptoms). Refer to Testing and Adjusting, SENR 5664, "Heater Performance - Tests" to evaluate system performance before beginning the corrective procedures. The problem must be diagnosed first. If any parts are found damaged during inspection, repair or replace them.

 Symptom: When the heater control knob is turned to the highest setting, little or no heat flows to the cab. Possible Cause 1 The blower motor is not operating. 1. Check the circuit breaker or fuse box to ensure there are no open circuits in the system. 2. Visually inspect the wiring harness for damaged wires and missing connectors. Refer to the electrical schematic for each machine to ensure proper connections. 3. Inspect the fan blades to ensure they are not obstructed or stuck. 4. Check that the fan switch operates properly at all settings. The blower motor should operate at a variety of settings and temperatures.

Possible Cause 2 There is a leak in the system. 1. Check the hose clamps to ensure they are not missing and are tightened according to the torque values ​​shown in the diagram. 2. Check the heating coil for any visible cracks or leaks. 3. Check the water valve to ensure it is installed correctly and is functioning properly.

Possible Cause 3 The engine cooling system's inlet/outlet is closed. 1. Check the valve connecting the heater hose to the engine block. 2. Ensure the valve is fully open.

Possible Cause 4 The hoses connecting the system are kinked or clogged. 1. Check the hoses for blockages or bends. Blockages and bends in the heater hoses can restrict the flow of coolant and reduce the performance of the entire heating system. 2. Replace any hoses that may be restricting coolant flow.

Possible Cause 5 The heater's controls are malfunctioning. 1. Determine the type of controls used on the machine. 2. If the system is equipped with a water valve, proceed to step 3. If the system is equipped with a blend door, proceed to step 6. 3. Inspect the water valve for signs of damage. 4. Inspect the water valve to ensure that it fully opens when the temperature control knob is set to the hottest position. 5. If the water valve will not open or close, proceed to "Possible Cause 6." 6. Inspect the blend door. 7. Inspect the blend door for any damage. 8. Ensure that the insulation on the blend door is intact. 9. Ensure that the actuator is connected to the blend door. 10. Inspect the blend door to ensure that it fully opens when the temperature control knob is set to the hottest position.

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 Possible Cause 6 The water valve cable or potentiometer is faulty. 1. Determine the type of water valve control used on the machine. 2. If the water valve has a cable connected, proceed to step 3. If the machine has a built-in potentiometer, proceed to step 5. 3. Inspect the machine to ensure that the cable is connected to the water valve handle. 4. Inspect the water valve to ensure that the water valve is fully open when the temperature control knob is set to the hottest position. 5. Inspect the machine to ensure that the potentiometer is connected to the wiring harness in the cab instrument panel. 6. Inspect the water valve to ensure that the water valve is fully open when the temperature control knob is set to the hottest position.

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How to Install a Caterpillar 320D2 EXCAVATOR Oil Cooler

 

Assembly Steps

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Note:

Keep all parts clean and free of debris.

Debris can cause rapid wear and shorten component life.

1. Ensure the cooler base (5) is clean, free of obstructions, or damage. Ensure the bulkhead (7) is clean and free of damage. Replace any damaged parts.

2. Place the new fitting (6) on the bulkhead (7). Install the cooler base (5) onto the bulkhead.

3. Install and tighten the bolts (4) by hand.

Installation Steps

 

 

1. Clean the cylinder gasket surface.

2. Position the new gasket (3) (not shown) onto the engine oil cooler assembly (2). Install the bolts (1) into the serrated holes in the gasket. Note: Ensure that the bolts of different lengths are installed in the correct position.

3. Install Tooling (A) onto the cylinder block.

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4. Install the oil cooler assembly (2) onto Tooling (A). Ensure that the oil cooler assembly is properly seated in the groove in the cylinder block.

5. Tighten the bolts (1) by hand.

6. Remove Tooling (A).

7. Install the remaining bolts (1) onto the engine oil cooler assembly (2).

8. Tighten the bolts (1) in the sequence shown in Figure 3 to a torque of 22 N·m (195 lb in).

9. Install the oil filter base. Refer to Disassembly and Assembly, "Oil Filter Base - Remove and Install" for the correct procedure.

10. Fill the cooling system to the correct level. Refer to the Operation and Maintenance Manual, "Cooling System Coolant - Change" for the correct procedure. https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis... Friday, October 26, 2018

11. Check the engine oil level. For the correct procedure, refer to the Operation and Maintenance Manual, "Engine Oil Level 

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How to Install a Caterpillar 320D2 EXCAVATOR Water Pump

 

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NOTE: Keep all parts clean and free of foreign matter. Foreign matter will cause rapid wear and shorten component life.

NOTE: When inspecting, maintaining, testing, adjusting, and repairing the product, always take care to ensure that fluids are contained.

Before opening any chamber or disassembling any component that contains fluids, be prepared to collect the fluids in a suitable container.

Dispose of all fluids in accordance with local regulations and directives.

1. Ensure that the water pump is clean and free of wear or damage. If necessary, replace the water pump.

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2. Install the cover to the water pump, if necessary. Install the cover by following steps 2.a through 2.d.

a. Clean the gasket surface of the cover (7).

b. Position the new gasket (6) (not shown) onto the water pump (3).

c. Install the cover (7) onto the water pump (3).

d. Install bolts (9) to cover (7). Tighten bolts finger-tight.

 

3. Clean the gasket surface of the front cover (1).

4. Install Tooling (A) in position (X).

5. Use Tooling (A) to align the new gasket (2) with the front cover (1). Install the gasket to the front cover.

6. Align the water pump (3) with Tooling (A). Install the water pump to the front cover (1).

Note: Make sure the gears of the water pump mesh with the gears of the injection pump.

(5) M8 × 30 mm

(4) M8 × 75 mm

(8) M8 × 65 mm

 

7. Install bolts (4), (5), and (8). Refer to Figure 3. Tighten the bolts by hand. Note: Make sure all bolts of different lengths are installed in the correct position.

8. Remove Tool (A) and install the remaining bolts (4).

9. Tighten bolts (4), (5), (8), and (9) in the order shown in Figure 4 to a torque of 22 N·m (195 lb in).

10. Install the hose to the water pump inlet. Tighten the hose clamp securely.

11. Fill the cooling system with coolant. Refer to the Operation and Maintenance Manual, "Cooling System Coolant - Change" for the correct

procedure.

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How to Remove Caterpillar 320D2 Excavator Radiator and Hydraulic Oil Cooler

 

Removal Steps Begin:

A. Remove hood.

B. Remove fan.

C. Remove aftercooler.

D. Remove condenser.

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1. Drain hydraulic oil into a suitable container for storage or disposal.

2. Drain engine coolant into a suitable container for storage

 

3. Disconnect hose assemblies

(1) and (5). Remove tube assemblies

(2) and (6). Disconnect hose assembly

(3) and remove reservoir (4).

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4. Loosen clamps (7) and (9). Slide hose (8) into tube assembly (10). Remove cable strap (11) and remove panel (12).

5. Remove cover (14). Remove bolts (13) and (15).

6. Remove hose assembly (16).

7. Attach a suitable lifting device to radiator and hydraulic cooler assembly (17).

8. Remove bolts (18). Remove radiator and hydraulic cooler assembly (17).

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