335d rodillo

Principio del formulario

Operacin de Sistemas D4E-UP MOTOR 3014CB-334D and CB-335D Vibratory Compactors Vibratory System Nmero de medio -KENR7046-03 Fecha de publicacin -01/04/2003 Fecha de actualizacin -02/04/2003

General InformationSMCS - 1400; 5050; 6606Final del formularioPrincipio del formulario

Illustration 1g00881493

Schematic of the Vibratory Circuit for the CB-334D (1) Front Vibratory Motor (2) Rear Vibratory Motor (3) Hydraulic Oil Cooler (4) Hydraulic Oil Tank (5) Strainer (6) Tandem Mounted Steering Pump and Vibratory Pump (7) Vibratory Control Valve

The vibratory system is a hydraulic open loop circuit. The following components are the main components of the vibratory system: tandem mounted steering pumps and vibratory pumps (6), vibratory control valve (7), rear vibratory motor ( CB-344D) (2), front motor (1) and hydraulic oil tank (4) . Oil for the vibratory system is supplied by the vibratory pump. The vibratory pump is bolted to the hydrostatic propel pump. The charge pump is mounted in tandem to the vibratory pump. The oil flows from hydraulic oil tank (4) through strainer (5) to the tandem mounted steering pump and vibratory pump (6). Pressurized oil flows into the vibratory control valve (7). The vibratory control valve regulates the vibratory system pressure. The vibratory control valve also directs oil flow to front vibratory motor (1) and to rear vibratory motor (2) (if equipped). Return oil from the motor is cooled when the oil flows through hydraulic oil cooler (3). Oil flows to hydraulic oil tank (4) from hydraulic oil cooler (3).


Left Engine Compartment (6) Tandem Mounted Steering Pump and Vibratory Pump

A two-section gear pump is used in order to produce the oil flow that is necessary to operate the vibratory system and the steering system. The vibratory pump is mounted in-line with the propel pump that is connected to the engine flywheel. The charge pump is attached in tandem to the vibratory pump.


Rear of Engine (7) Vibratory Control Valve

The RPM of the charge pump and of the vibratory pump is equal to the RPM of the engine. Vibratory control valve (7) is mounted above the hydraulic pumps. Vibratory control valve (7) is accessible from the left side of the engine compartment. The following functions are functions of the valve: limiting the maximum vibratory pressure in the system, turning the vibratory system on and off and causing a rapid shutdown of the vibratory action.


(1) Front Vibratory Motor

Front vibratory motor (1) is mounted on the right front side of the compactor drum. Rear vibratory motor (2) is mounted on the left rear side of the compactor drum (if equipped). The motor is connected by a shaft to the eccentric weight that is mounted inside the drum. When the motor is energized, the motor causes the eccentric weight to rotate. This rotation generates the vibratory action.


(4) Hydraulic Oil Tank

Hydraulic oil tank (4) is located in the forward section of the engine compartment. The hydraulic oil tank supplies the following systems with the correct amount of oil: the vibratory system, the steering system and the propel system. Vibratory Control


Propel Control Lever (8) Vibration Switch (9) Propel Control Lever

The vibratory system is turned on and off by depressing switch (8). Switch (8) is located on top of propel control handle (9). Propel control handle (9) is located on the right side of the operator's seat. Vibratory switch (8) can be engaged or disengaged regardless of the position of propel control handle (9) . Final del formularioPrincipio del formulario

Operacin de Sistemas CB-334D and CB-335D Vibratory Compactors Vibratory System

Vibratory Hydraulic SystemSMCS - 5050; 6606Final del formularioPrincipio del formulario

CB-334D Circuit Functions Vibratory System Off


Vibratory System Schematic for CB-334D (1) Front Vibratory Motor (2) Selection Valve for the Vibratory Drum (3) Relief Valve (4) Rear Vibratory Motor (5) Anti-lope Relief Valve (6) Solenoid Control Valve (7) Solenoid Control Valve (8) Main Relief Valve (vibratory pressure) (9) Hydraulic Oil Tank (10) Hydraulic Oil Cooler (11) Strainer (12) Tandem Vibratory Pump and Steering Pump (13) Vibratory Control Valve

When the vibratory control switch is in the OFF position, solenoid control valves (6) and (7) are not energized. Oil from the vibratory section of pumps (12) flows into vibratory control valve (13). When solenoid control valve (7) is de-energized, a return spring holds the valve in the open position in order to allow flow. Oil flows through solenoid control valve (7). The low pressure oil bypasses the vibratory circuit and flows back to hydraulic oil tank (9) through hydraulic oil cooler (10) . Dual Drum Vibration Mode



Perform the following procedure in order to operate in the dual drum vibration mode. 1. Select dual drum mode on the control console.2. Move the propel control handle in the direction of machine movement that is desired.3. Activate the vibratory system by depressing the ON/OFF switch on the propel control lever.Oil from the vibratory section of pumps (12) flows to vibratory control valve (13). When the vibratory system is activated, solenoid control valves (6) and (7) are energized. While solenoid control valves (6) and (7) are energized, oil flow through solenoid control valve (7) is blocked. When solenoid control valve (7) is blocked, oil flows to drum selector valve (2). Main relief valve (8) limits the vibratory circuit pressure to 20000 kPa (2900 psi). At relief pressure, oil flows through main relief valve (8) to hydraulic oil cooler (10) and returns to hydraulic oil tank (9) . Vibratory drum selector valve (2) is in the center position, and oil cannot flow through the valve. High pressure oil flows to front vibratory motor (1). Oil then flows from front vibratory motor (1) to rear vibratory motor (4). When the vibratory system is running, the two motors operate in series so that each motor creates half of the total pressure drop of the vibratory system. Relief valve (3) is located between front vibratory motor (1) and rear vibratory motor (4). Relief valve (3) functions only when vibratory drum selector valve (2) is shifted from the single drum to the dual drum without first turning the system off. Relief valve (3) protects the rear vibratory motor from pressure spikes that occur when the rear vibrator is quickly accelerated to speed. Relief valve (3) is set at 12000 kPa (1740 psi). Oil that is leaving rear vibratory motor (4) creates the low pressure loop circuit. Anti-lope relief valve (5) functions when the vibratory system is turned off. Anti-lope relief valve (5) works in conjunction with solenoid control valve (6). When the system is turned off, solenoid control valve (6) is de-energized and blocks return oil flow. A pressure spike is created. When a pressure spike is created, relief valve (5) is open. When relief valve (5) opens, back pressure is created. This pressure will quickly decelerate the vibratory motors. Relief valve (5) is set at 8000 kPa (1160 psi). Low pressure oil returns to the hydraulic oil tank (9) through hydraulic oil cooler (10). Oil that leaks internally into the motor casings is returned to hydraulic oil tank (9) through the return lines. Single Drum Vibration Mode



Perform the following procedure in order to operate the single drum vibration mode. 1. Select front drum mode or rear drum mode on the control console.2. Move the propel control handle in the direction of the machine movement that is desired.3. Activate the vibratory system by depressing the on/off switch on the propel control lever.Oil from the vibratory section of pumps (12) flows to vibratory control valve (13). When the vibratory system is activated, solenoid control valves (6) and (7) are energized. While solenoid control valves (6) and (7) are energized, oil flow through solenoid control valve (7) is blocked. When solenoid control valve (7) is blocked, oil flows to drum selector valve (2) . Main relief valve (8) limits the vibratory circuit pressure to 20000 kPa (2900 psi). At relief pressure, oil flows through main relief valve (8) to hydraulic oil cooler (10) and returns to hydraulic oil tank (9) . If only the front drum is selected, vibratory drum selector valve (2) is actuated to the left position. Vibratory drum selector valve (2) routes oil to a blocked port. Oil flows to front vibratory motor (1). Then, the oil flows back through vibratory drum selector valve (2) and solenoid control valve (6). Rear vibratory motor (4) has low pressure return oil on both ports which prevents the motor from turning. The pressure on the inlet side is slightly higher due to the pressure drop across vibratory drum selector valve (2). The elevation of pressure can cause rear vibratory motor (4) to continue running if vibratory drum selector valve (2) is shifted from dual drum vibration to single drum vibration. Resistance of flow in front vibratory motor (1) creates the high pressure loop circuit. Oil which leaves the front vibratory motor (1) is the low pressure side of the loop circuit. Low pressure return oil flows to both sides of the rear vibratory motor (4) that creates a hydraulic lock. If only the rear drum is selected, vibratory drum selector valve (2) is actuated to the right position. Oil flows to the front vibratory motor (1) and then oil flows to vibratory drum selector valve (2). Vibratory drum selector valve (2) routes oil to both the front vibratory motor (1) and the rear vibratory motor (4). This creates equal oil pressure on both sides of the front vibratory motor. This causes a hydraulic lock. The outlet side of the rear vibratory motor (4) has low pressure oil. This allows the vibratory motor to turn. Relief valve (3) is located between front vibratory motor (1) and rear vibratory motor (4). Relief valve (3) functions only when vibratory drum selector valve (2) is shifted from the single drum mode to the dual drum mode without first turning the system off. Relief valve (3) protects the rear vibratory motor from pressure spikes. Pressure spikes occur when the rear vibrator is quickly accelerated to speed. Relief valve (3) is set at 12000 kPa (1740 psi). Solenoid control valve (6) routes oil through hydraulic oil cooler (10) and back to the hydraulic oil tank (9). Oil that leaks internally into the motor casings is returned to hydraulic oil tank (9) through the return lines. CB-335D Circuit FunctionsVibratory System OFF


Vibratory System Schematic for CB-335D (1) Vibratory Motor (2) Return Line (vibratory motor) (3) Anti-lope Relief Valve (4) Solenoid Control Valve (5) Solenoid Control Valve (6) Main Relief Valve (vibratory pressure) (7) Hydraulic Oil Tank (8) Hydraulic Oil Cooler (9) Strainer (10) Tandem Vibratory Pump and Steering Pump (11) Vibratory Control Valve (12) Line

When the vibratory control switch is placed in the OFF position, solenoid control valves (4) and (5) are not energized. Oil from the vibratory section of pumps (10) flows into vibratory control valve (11). Oil fills the pressure side of the vibratory circuit by way of line (12). Oil also flows through the open center section of solenoid control valve (5). Oil flow is blocked in return valve (4). When the oil flow is blocked, vibratory motor (1) cannot turn. The oil returns to the hydraulic oil cooler (8) and to hydraulic oil tank (7) . Vibratory System ON


Vibratory System Schematic for CB-335D (1) Vibratory Motor (2) Return Line (vibratory motor) (3) Anti-lope Relief Valve (4) Solenoid Control Valve (5) Solenoid Control Valve (6) Main Relief Valve (vibratory pressure) (7) Hydraulic Oil Tank (8) Hydraulic Oil Cooler (9) Strainer (10) Tandem Vibratory Pump and Steering Pump (11) Vibratory Control Valve (12) Line

When the vibratory control switch is placed in the ON position, solenoid control valves (4) and (5) are energized. Oil from the vibratory section of pumps (10) flows into vibratory control valve (11). With solenoid control valves (4) and (5) in the energized position, oil flow through solenoid control valve (5) is blocked. The blocked oil flow creates a pressure increase in the pressure side of the vibratory circuit through line (12). The pressure differential that is across vibratory motor (1) causes the motor to rotate. Main relief valve (6) limits the vibratory circuit pressure to 20000 kPa (2900 psi). At relief pressure, oil flows through main relief valve (6) to hydraulic oil cooler (8) and returns to hydraulic oil tank (7) . Anti-lope relief valve (3) is a pressure sensing valve. When the vibratory system is operating, relief valve (3) is held shut by high pressure oil. When the vibratory switch is turned to the OFF position, solenoid control valve (4) closes off the return oil flow to the hydraulic oil cooler (8). When the return flow is blocked, the pressure increases in return line (2) and relief valve (3) opens. When relief valve (3) opens, back pressure is created in return line (2). Vibratory motor (1) decelerates until the motor stops rotating. Final del formularioPrincipio del formulario

Final del formularioPrincipio del formulario

Pruebas y Ajustes CB-334D and CB-335D Vibratory Compactors Vibratory System

Vibratory System TroubleshootingSMCS - 6606-035Final del formularioPrincipio del formulario

Checks During OperationWhen the engine is running, operate the machine in each direction. Use all speed ranges when you operate the machine. Note all abnormal noises. Locate the sources of the abnormal noise. Refer to the list of problems and of probable causes in order to determine the necessary adjustments. The checks during the operation can be used to find leakage in the system. The checks can also be used to find a bad pump, a bad valve, or a bad motor. Vibratory frequency can be used to check the condition of the vibratory motor and of the pump. Before you check the vibratory system, operate the machine in each direction. Use all speed ranges when you operate the machine. During this procedure, check the condition of the rubber blocks. The blocks act as isolators between the vibrating parts of the machine and the parts of the machine that do not vibrate. Dual Drum Vibration Mode ( CB-334D)1. Observe both drums. The rotation of the drums should be smooth and regular.2. The vibratory system should start only when the vibratory ON/OFF switch is in the ON position.3. Check the vibration of each drum.4. Be sure that the vibratory system stops within two to four seconds after the vibratory control switch is turned to the OFF position.5. Check the vibratory system for noise from the vibratory pump and from the vibratory motor.Front Drum Vibration1. Observe the front drum. The drum rotation should be smooth and regular.2. The vibratory system should start only when the vibratory control switch is turned to the ON position.3. Be sure that the vibratory system stops when the vibratory control switch is turned to the OFF position.4. Check the vibratory system for noise from the vibratory pump and from the vibratory motor.Probable Causes of Vibratory System ProblemsProblem The vibratory system does not operate in forward travel or in reverse travel. Probable Cause 1. There is low oil level in the hydraulic tank.2. The suction screen on the hydraulic tank is restricted.3. There is failure of the vibratory pump.4. The electrical system is faulty.5. The vibratory motor has failed.6. The vibratory selector control valve has failed.7. The main relief valve adjustment is incorrect.8. The solenoid control valves are faulty.9. The vibratory ON/OFF control switch is faulty.10. The eccentric weight shaft has failed.11. The coupling for the eccentric weight has failed.12. The electrical wiring is faulty.Problem There is a periodic loss of the vibratory system. Probable Cause 1. The vibratory control switches are faulty.2. There are loose connections in the electrical wiring circuit.Problem Slow vibration frequency at start-up. Probable Cause 1. The pressure of the vibratory main relief valve is set too low.2. There is low engine speed and low power.3. The solenoid valves are not operating properly.Problem The engagement of the vibratory system is harsh. Probable Cause 1. The pressure of the vibratory main relief valve is set too high.Problem The shutdown of the vibratory frequency is slow. Probable Cause 1. The solenoid control valve on the return side of the loop does not close correctly.2. The rear vibrator will continue running if the vibration is switched from the dual drum vibration mode to the front drum vibration mode on the CB-334D machine.3. The vibration ON/OFF switch is faulty.4. The anti-lope relief valve is stuck open.5. The anti-lope relief valve is set too low.Problem The compactor does not reach maximum vibratory frequency. Probable Cause 1. The oil level of the vibrator housing is too low.2. The adjustment of the engine high idle is incorrect.3. The hydraulic suction screen is restricted.4. The gears in the pump or in the pump case are worn, resulting in excessive leakage.5. The gears are worn or the pump case is worn in the motor housing.6. There is failure of the vibratory bearings.7. The solenoid control valve is not closed completely.8. The pressure of the vibratory main relief valve is set too low.Problem The vibratory system components are noisy. Probable Cause 1. There is a lack of lubrication oil in the vibratory housing.2. The vibratory drive shaft or the components that lead to the vibratory drive shaft have failed.3. The retaining bolts for the vibratory motor are loose.4. The vibratory bearings have failed.Problem The oil in the hydraulic circuit overheats. Probable Cause 1. The pressure of the vibratory main relief valve is set too low.2. Incorrect oil is used in the hydraulic system.3. The air flow to the hydraulic oil cooler is restricted.4. The cooling fins are plugged on the hydraulic oil cooler.5. There is excessive internal leakage in the open circuit.6. The vibratory shaft bearings failed.Problem The compactor vibrates only in the dual drum vibration mode. Probable Cause 1. There is no electrical power to the solenoid.2. There is failure of the vibratory selector control valve.3. There is failure of the vibratory selector switch.Problem The compactor vibrates only in the single drum vibration mode. Probable Cause 1. There is failure of the vibratory selector control valve.2. There is failure of the vibratory drum selector switch.

Final del formularioPrincipio del formularioFinal del formularioPrincipio del formulario

Vibratory Frequency - Test and AdjustSMCS - 6606-025; 6606-081Final del formularioPrincipio del formulario

Table 1

Required Tools

Tool Part Number Description Qty

A 133-9905 Frequency Meter 1

B 133-0963 Drum Vibration Tachometer 1

NOTICE

If a testing time longer than three (3) minutes is required, rotate the drum periodically in order to lubricate the eccentric weight shaft bearings.

Note: Tests should be performed so that neither drum contacts the ground. Tires are recommended. Never operate the vibratory system when the machine is on concrete. The oil temperature must be 38C (100F) in order to get the correct results. All frequency test must be made with the engine RPM at the maximum 2800 RPM. Read the vibrations per minute (VPM) from the drum vibration tachometer. Correct vibratory frequencies that are an indication of normal circuit operation are listed below. The relief valves for the anti-lope circuit and for the main line must be checked in order to verify that the opening pressure of each valve is correct. Vibratory frequency for CB-335D (5PZ1-UP) ... 3360 - 3660 VPM Vibratory frequency for CB-334D (4CZ1-UPDCZ1-UP) and CB-335D (BBW1-UPD4E1-UP) ... 4100 - 4250 VPM Final del formulario


Operacin de Sistemas CB-334D and CB-335D Vibratory Compactors Machine Systems Nmero de medio -KENR7049-03 Fecha de publicacin -01/04/2003 Fecha de actualizacin -02/04/2003

Steering Hydraulic SystemSMCS - 4300; 5050Final del formularioPrincipio del formulario


Steering System Schematic (1) Steering Cylinder (2) Metering Pump (3) Relief Valve (4) Fan motor (5) Steering Pump (6) Strainer (7) Hydraulic oil tank (8) Hydraulic oil cooler

The steering pump receives oil from hydraulic tank (7) through strainer (6). The oil from the steering pump flows through fan motor (4). When the steering is turned, the steering cylinder receives oil from metering pump (2). When the steering wheel is not turned, the hydraulic oil passes through metering pump (2). Final del formulario


Final del formulario

335d rodillo

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