Cooperación regulatoria internacional

Neutral position OK?

no

yes

Check the mechanical neutral position

- Enter code number 500 to close the brake - Connect control chamber ports X1 and X2 with

a hose

Adjust the hydraulic neutral position

- Remove the hose connecting X1 and X2 - Run the engine with maximum speed. - Adjust the hydraulic neutral position so that

identical pressures are indicated at MA and MB (charge pressure)



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Machine does not drive / insufficient travel performance

High pressure OK? no yes Brake valve OK? yes

no Replace the brake valve

Check high and charge pressure

- Connect 600 bar pressure gauges to the high pressure test port

- Connect a 60 bar pressure gauge to the charge pressure test port

- Start the engine and run it with maximum speed

- Drive the machine against the closed brake, for this purpose enter code number 500, actuate the travel lever for a moment and read the pressure gauge

Nominal value:

High pressure approx. 400 bar ±10 bar, charge pressure approx. 26 bar

Check the brake releasing pressure

- Install a 60 bar pressure gauge to the brake releasing line

- Start the engine and check whether the brake valve opens when the brake is released

Nominal value:

approx. 26 bar (charge pressure)

Mechanical fault, blocked drive

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Charge pressure OK?

yes

no

Check the front steering pressure

- Connect a 600 bar pressure gauge to the steering pressure test port - Enter code number 600

- Pull the plug off the starter solenoid and crank the engine with the starter - Turn the front steering against one of

the end stops and read the pressure gauge

Nominal value:

approx. 200 bar (battery fully charged)

Steering pressure OK?

yes

no _{Perform trouble shooting}

for front steering system

Check the rear steering pres- sure

- Connect a 600 bar pressure gauge to the steering pressure test port

- Enter code number 600 - Pull the plug off the starter so-

lenoid and crank the engine with the starter

- Turn the rear steering against one of the end stops and read the pressure gauge

Nominal value:

approx. 200 bar (battery fully charged)



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Check leakage of brake

- Release the brake and perform a charge pressure test

Charge pressure OK?

no

yes

- Disconnect the brake releasing lines one after the other from the drum drive motors and close them with plugs; repeat the charge pres- sure test with the brake closed - Repair the unit with which the charge pressure is OK after the brake line has been disconnected

Valve OK?

yes

no Replace the charge pres-

sure relief valve

Check the charge pres- sure relief valve

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Flushing valve OK?

no

yes _{Replace the flushing valve}

Check the flushing valve

Check the travel pump

- Close the high pressure ports on the pump with plugs

- Repeat the pressure test

High pressure OK?

no

Check the control chamber pres- sure

- Install pressure test ports with 60 bar pressure gauges to X3/X4 yes

- Actuate the travel pump to full displacement and read the pres- sure gauge



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Nozzles OK? no

yes

Check the swash time nozzles

- Unscrew the nozzles and check for blockage

Clean the nozzles

Check the case pressure

- Install a pressure test port with a 10 bar pressure gauge to G

Pressure OK? no

yes

Check the leak oil return line to the tank - Actuate the travel pump to full dis-

placement and read the pressure gauge

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Test the travel motors individually

- Close the high pressure test ports on the drum drive motors one after the other with plugs

- Repeat the pressure test

- If the high pressure is O.K., replace the travel motor excluded from the hydraulic circuit.

Replace/repair the travel pump Servo control

OK?

no

Repair the servo control

Check the servo control

- Remove the servo control - Check the nozzles, clean if nec-

essary.

- Check the linkage, repair if nec- essary



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Hydraulic oil overheating >90 °C

Valves OK?

yes

no

Check the high pressure relief valves in the travel circuit

- Enter code number 500 to close the brake

- Fully actuate the travel lever

- Check the high pressure relief valves for excessive heat

Check high pressure relief valves in vi- bration circuit

- Stand the drums on rubber tires - Switch the vibration on

- Check high pressure relief valves for ex- cessive heat

Check the high pressure relief valves/pressure override

Check the thermostat valve

- Check whether the hose to the cool- er heats up when a hydraulic oil temperature of > 60 °C is reached

Thermostat OK?

yes

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Check the flushing valve in the travel sys- tem

- Check the moveability of the flushing valve

Check the flushing valve in the vibration system



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No vibration at front and rear

Travel system O.K.

Current OK?

yes

no Perform trouble shooting

in the electric system

Check the control chamber pressure

- Install pressure test ports to X1 and X2 - Connect a 60 bar pressure gauge - Run the engine with maximum speed - Switch the vibration on and read the pres-

sure gauge

Nominal value: approx. 12 bar

Pressure OK?

yes

no

Check the electric power supply for the solenoid valves

- Switch the vibration on and measure the current consumption of both solenoids

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Check the vibration pump

- Connect 600 bar pressure gauges to the vi- bration pump

- Close high pressure ports A and B with plugs - Run the engine with maximum speed . - Switch the vibration on for a moment and read

the pressure gauge

Nominal value: approx. 380 bar

Check the control unit

- Remove the control unit

- Check the nozzle, clean if neces- sary.

- Check the control piston, if nec- essary replace the control unit

Pressure OK?

yes

no Replace/repair

the vibration pump

no Replace / repair

the coupling

Check the vibrator shaft bearings

- Remove the vibration motor - Check end float and moveability

of the vibrator shafts - Check the coupling

Bearing / coupling



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Speed of front and rear vibrator shafts too low

Rated speed OK?

yes

no Perform engine

trouble shooting

Checking the engine speed

- Switch vibration on and measure the speed

Nominal value:

Nominal speed 2600 rpm

yes

no

- Adjust high and low fre- quency

yes

no

Check the pressures in the vibration circuit

- Connect 600 bar pressure gauges to the high pressure test port

- Connect a 60 bar pressure gauge to the charge pressure test port

- Run the engine with maximum speed.

- Switch the vibration on and read the pressure gauge

Nominal value:

Start up pressure: 380 ±20 bar

Operating pressure: approx. 100 bar (depending on soil) Charge pressure: approx. 26 bar

Charge pressure OK?

Drop in vibrator shaft speed

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In document INFORME ANUAL DE DESEMPEÑO (página 69-73)