VACUUM PUMP ON THE HYDRAULIC TANK

In order to limit the hydraulic oil leaks during maintenance works or repairs in the hydraulic system (replacement of with a vacuum pump allowing to keep the hydraulic tank at depression during the works.

This vacuum pump (fig.1, pos. 1), mounted to the rear of the hydraulic tank beside its switch box (pos. 2), must be connected to the tank using the attached suction hose before carrying out the maintenance works and disconnected again from the tank after completion of these works.

Connection of the vacuum pump to the hydraulic tank: Pull the fitting 8 of the suction hose 6 out of its housing 7 at the front of the hydraulic tank, Remove the protection plug 9 from the fitting 8, Unscrew the breather filter 5 so the pressure inside the hydraulic tank can escape and then remove the breather filter (fig. 3, "O"), Screw the fitting 8 of the suction hose into the threaded hole instead of the breather filter (lightly lubricate the seal).

Starting the vacuum pump: With the suction hose of the vacuum pump connected to the hydraulic tank, and the Diesel engine shut down : Turn the ignition key into "contact" position, Depress the push button S 139, the vacuum pump will start and the control light inside the push button lights up at the same time.

Notice: The vacuum pump cannot be started when the Diesel is in operation.

Stopping the vacuum pump: Depress the push button S 139, the vacuum pump and at the same time the control light in the button S 139 will turn off.

Disconnecting the vacuum pump from the hydraulic tank:

Unscrew the fitting 8 of the suction hose from the bore hole for the breather filter, reattach the protection plug 9 to the fitting of the suction hose, insert the fitting 8 of the suction hose into housing 7 at the front of the hydraulic tank, reinstall the breather filter into its bore in the hydraulic tank (fig. 3, "S").

Additional Heaters

Your machine is equipped with the following additional heater which permit to start the engine and to work without defaults with the machine down to very low temperatures.

1) ADDITIONAL WATER HEATER (Standstill heater)

This heater works with Diesel fuel and is used for warming up the engine cooling system, the engine oil, the splitterbox oil, the fuel tank and the batteries box.

This heater is controlled, depending on execution or customer's wish either via the digital timer U103 (Fig. 2), or via the mini-clock S232 (Fig. 3) on the rear control panel.

See the attached operation manual for the heater programmer of the firm Eberspächer.

In operation the circulating pump is working automatically and the burning is put out and on thanks to the thermostat ( 65°C in the water circuit), so the circulating pump is continuing to work.

To guarantee a optimal preheating of the excavator (Diesel engine, splitterbox, battery compartment and cabin), the water heater must work until the thermostat stops to warm the water circuit for the start of the engine.

The start time of the heater, depends of the waiting exterior temperatures, and is programmed so that the cut-off temperature is reached when the machine is started.

When the heater is stopped, the combustion will be finished. The heater bleeding works about 150 seconds after running.

A heater re-throwing is authorised during the after running.

heater 10 or 20 minutes before the start to make easier the start procedure.

2) ELECTRICAL ADDITIONAL HEATERS

220 Volts supply for the additional water heater

Your excavator is equipped with an electrical box allowing to employ the additional water heater with an exterior power source (220 Volts).

When plugging the exterior power source to the electrical box 5 (Fig. 4), the control light 6 lights up, and the supply of the of the standstill heater is commuted automatically from the batteries to the 220 Volts power source.

220 Volts additional heaters for Diesel engine and hydraulic circuit

The following electrical heaters which are mounted as an option can be controlled via the electric box 5 too: Electrical heating of Diesel engine coolant, Electrical heating of Diesel engine lubrication oil, Electrical heating of hydraulic oil, The turning on and off of these additional heater is achieved, depending on the installed power of the heating resistors: either via the three distinctive switches (S120-1, S120-2 and S120-3, fig. 5) mounted to the electrical control box. Or in automatic over the thermostatic element which is mounted in each circuit. In this second case the heaters are made alive as soon as the exterior power source is switched to the electrical box 5 and turned off when the desired temperature is reached in the concerned circuit.

Notice:

As soon as possible during the halt of excavator, the electric box should be plugged in, on an exterior power source (220 Volts), to economise the batteries. More longer is the halt (for example during the week-end), more reasonable is to use the additional heater with a 220 Volts power source.

The start of the machine, with the exterior power source (200 Volts) plugged, is possible.

3) FUEL PREHEATING (Option)

The fuel feed line between the fuel tank and the Diesel engine can be electrically preheat by plugging in the exterior power source on the male plug of the electric box (Fig. 2). This electric box is under the cabin.

This electric box must be plugged 10 minutes before the engine start

4) ADJUSTABLE AIR ADMISSION LOUVERS FOR OIL AND WATERCOOLERS (OPTIONAL INSTALLATION)

When starting the machine at temperatures below 0°C, the adjustable louvers in the air admission circuit to the coolers should be closed.

To close, move the lever (fig. 6) to S direction.

If during operation an overheating of the engine cooling water or of the hydraulic oil is signalled, so the air admission louvers must be re opened immediately.

5) PREHEATING OF THE HYDRAULIC SYSTEM (FOR

Let the Diesel engine run at 1500 RPM during approx. 10 minutes after starting.

Then bring the engine to the maximum RPM and actuate at the same time the stick cylinder to the stop for about 10 minutes to preheat the oil.