diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/ILoadChartFiller.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/ILoadChartFiller.java
index e50fb4158..e5df9ac46 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/ILoadChartFiller.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/ILoadChartFiller.java
@@ -20,7 +20,6 @@
 
 package org.navalplanner.web.planner;
 
-import java.util.Date;
 import java.util.SortedMap;
 
 import org.joda.time.LocalDate;
@@ -37,15 +36,8 @@ public interface ILoadChartFiller {
 
     void fillChart(Timeplot chart, Interval interval, Integer size);
 
-    String getServletUri(final SortedMap<LocalDate, Integer> mapDayAssignments,
-            final Date start, final Date finish);
-
     void setZoomLevel(ZoomLevel zoomLevel);
 
-    void resetMaximunValueForChart();
-
-    Integer getMaximunValueForChart();
-
     boolean zoomByDay();
 
     SortedMap<LocalDate, Integer> groupByWeek(SortedMap<LocalDate, Integer> map);
diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/LoadChartFiller.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/LoadChartFiller.java
index c218106ff..8cadf53cc 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/LoadChartFiller.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/LoadChartFiller.java
@@ -59,8 +59,7 @@ public abstract class LoadChartFiller implements ILoadChartFiller {
     public abstract void fillChart(Timeplot chart, Interval interval,
             Integer size);
 
-    @Override
-    public String getServletUri(
+    protected String getServletUri(
             final SortedMap<LocalDate, Integer> mapDayAssignments,
             final Date start, final Date finish) {
         if (mapDayAssignments.isEmpty()) {
@@ -180,13 +179,11 @@ public abstract class LoadChartFiller implements ILoadChartFiller {
         this.zoomLevel = zoomLevel;
     }
 
-    @Override
-    public void resetMaximunValueForChart() {
+    protected void resetMaximunValueForChart() {
         this.maximunValueForChart = 0;
     }
 
-    @Override
-    public Integer getMaximunValueForChart() {
+    protected Integer getMaximunValueForChart() {
         return maximunValueForChart;
     }