Cold Weather Operation

OPERATION

6.Grind a small amount of material at a time adjust- ing the grinding wheel as necessary by turning the handwheel.

Note: If the grinder is not loaded against a work sur- face when the trigger is released, the wheel will take 5-10 seconds to come to a complete stop. Avoid un- intentional contact of the grinding wheel during the coast down period.

If the grinder is to be used during cold weather, preheat the hydraulic fluid at low engine speed. When using the normally recommended fluids, fluid temperature should be at or above 50° F/10° C (400 ssu/82 centistokes) be- fore use.

Damage to the hydraulic system or grinder can result from use with fluid that is to viscous or too thick.

PREVENTATIVE MAINTENANCE

1.The gears and bearings in the ram, spindle, and housing assemblies should be regreased every 6 months or 500 hours, This procedure must be ac- complished by a trained technician.

2.After each servicing, measure the spindle speed (rpm - revolutions per minute) at 12 gpm/45 lpm in- put. The nominal speed is 4000, not to exceed 6000 rpm. This procedure must be accomplished by a trained technician.

3.Inspect the spindle and drive flange for signs of wear or damage. Runout should not exceed .004 in./.1 mm TIR on threads or .002 in./.05 mm TIR on arbor diameters and faces.

4.Check hoses and fittings weekly for any evidence of leakage, cover wear, cracking or cuts. If any of these defects are found, discontinue use of the tool imme- diately and have the defects repaired or replaced by a trained technician.

5.To grease between main housing bore (item 73) and the ram outer diameter (item 26) use CAUTION only one to two pumps of grease are required at these locations, excess grease will lockup feed assembly

(See figure 4 below).

Figure 4

12 ► FG10/PG05 Service Manual