Turbosol TB30, Руководство по эксплуатации и обслуживанию

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6
MAINTENANCE
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561405 - IS19/07 - EN
6.1.12 PUMPING PISTONS REPLACEMENT
When in the cooling bowl sand grains or pebbles appear and not just cement, immediately replace all
pistons.
As repeatedly described herein, before performing any manual operation on the pumping unit or cooling
bowl, the diesel engine must be switched off. Therefore, turn off the engine and place the electric control
board ignition key in your pocket.
However, when performing these operations:
- do not use the radio control or remote control, which must be disconnected from the machine- do not allow anyone to
approach the machine or the control board during the piston replacement. If someone approaches the machine, the
aintenance operations must be immediately interrupted.
REMOVE THE PUSHING PISTONS
- Drain the water from the cooling bowl through the valve at the side of the machine
- Remove the protections above the bowl by removing the mechanical block (fixing screw)
- Turn on the machine, place the flow rate regulator at minimum
- Activate the pumping system until one of the two pistons reaches stroke end, so as to clearly see the spacer fitting in the
centre of the bowl (Fig. 6-10).
- Turn off the machine from the main board and put the key in your pocket (operation to be performed whenever you are about
to manually work on the pumping unit or on the cooling bowl).
- Open the discharge valve 1 of the hydraulic accumulator (Fig. 6-11 in closed position):
Open valve (discharge - maintenance phase)
Closed valve (work phase).
OPERATIONS TO BE PERFORMED AS SHOWN IN FIGURE 6-12.
Using a 14 Allen key, a 24 fixed key and a large screwdriver or iron strip unlock the 4 screws fixing the spacer fitting on the
hydraulic stem or pumping piston.
Hydraulic stem side:
Place a large screwdriver or iron strip in one of the spacer fitting holes to lock it in place, then loosen two of the 4 fixing screws
using the Allen key
The other two screws must be loosened with Allen key and fixed key, the screwdriver can be fixed against the water bowl side
as shown in figure.
Pumping piston side: