Lubrication Of The Ways - Siemens SINUMERIK 840D Maintenance Manual

4.1.2 LUBRICATION OF
THE WAYS
OCTOBER 2005
10. Grease Geneva wheel and gear using Kopr-Kote.
11. For high torque machines, check fluid level in the hydraulic actuator reservoir.
Refill, if needed, with Mobil DTE Heavy Medium.
12. Inspect all cooling fans, clean screens if necessary.
Every 4 months
Service way lube filter. Machines with an external filter require less frequent
replacement; however, do not exceed 4 months. When replacing the external filter, fill
the new filter with way lube prior to installation.
Waylube System
Use waylube type Castrol Magna BD68, Shell Tonna 68V or Mobil Vactra Oil #2.
The Positive Displacement Injection (PDI) lube system is a solenoid-controlled
pneumatic system. When the solenoid is activated, the pump sends oil to the junction
block assemblies, which may contain several different size valves, at a pressure ratio of
5:1. The pump is activated for 10 seconds, within a 4 minute cycle, during which oil is
distributed to all of the valves on the junction block assemblies. When the solenoid is
deactivated the oil flow stops and creates back pressure which escapes through a relief
valve. When the pressure on the valve drops below 50 psi, a spring inside the valve is
then able to inject oil into the lines.
The CNC has direct control of the automatic lube system. The cycle is activated by
executing an axis motion in a CNC program, commanding an axis move in MDI mode
or pressing the JOG key. Once activated it monitors the oil level to be sure the reservoir
is above the minimum level. In addition, it shuts the oil system down if the machine sits
idle longer than one cycle of the lube system.
Frequently clogging filters indicate that the wrong waylube is being used. Use Castrol
Magna BD68, Shell Tonna 68V or Mobil Vactra Oil #2 ONLY.
Procedure for Flushing a Contaminated Waylube System
This procedure is necessary when the waylube that was being used in the machine was
incorrect. Other waylubes may contain paraffin wax or silicone.
1. Replace the 10-port way lube junction block that is located at the left side of the
saddle.
2. Replace the External filter on the BIJUR PDI way lube pump (Part # LUB-0049).
MACHINE MAINTENANCE
SIEMENS MAINTENANCE MANUAL
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