Using the Extension Assembly

OPERATION

Cross Section of Typical Frog at 1/2” Point

Figure 1. Grinding the Wings of a Frog

GRINDING THE POINT

For grinding the point of a frog, place the grinder on top of the point with the rollers (91) resting on the top of the point. Adjust each wheel pivot (86) to the position shown in figure 2. Grinding is accomplished by moving the grinder back and forth in line with the rail. It may be necessary to rotate the entire grinder 180 degrees and place it on the other side of the point in order to completely grind the width of the point. The extension assembly (128) is normally used during point grinding operations.

Cross Section of Typical Frog at 1/2” Point

Figure 2. Grinding the Point of a Frog

PROFILE GRINDING

For profile grinding of rail, place the grinder on top of the rail with the rollers (91) resting on top of the rail to be ground. Adjust each wheel pivot (86) to the position shown in Figure 3. Grinding is accomplished by moving the grinder back and forth in line with the rail.

Cross Section of Typical Rail

Figure 3. Profile Grinding

The extension assembly (128) can be used at anytime by simply connecting it to one end of the grinder at the barrel nut (61) and clamping it in place by turning the adjustable handle (44).

CONNECTING THE HOSES

1.Wipe all hose couplers with a clean lint-free cloth before making connections.

2.Connect the hoses from the hydraulic power source to the hose couplers on the grinder. It is a good prac- tice to connect the return hose first and disconnect it last to minimize or avoid trapped pressure within the grinder motor.

3.Observe flow indicators stamped on hose couplers to be sure that oil will flow in the proper direction.

The female coupler is the inlet coupler.

NOTE: The pressure increase in uncoupled hoses left in the sun may result in making them difficult to connect. When possible, connect the free ends of operating hoses together.

OPERATING PROCEDURES

1.Observe all safety precautions.

2.Always start the grinder with the grinding wheel away from the work surface by turning the hand- wheel counter clockwise to raise the wheel.

3.Move the hydraulic circuit control valve to the “ON” position.

4.Squeeze the trigger momentarily. If the grinder does not operate, the hoses might be reversed. Verify correct connection of the hoses before continuing.

5.Start the grinder and move the grinding wheel to the work surface by turning the handwheel clockwise.

FG10/PG05 Service Manual ◄ 11