SECTION 5
PCM-875A Plasmarc Cutting System
Maintenance
5-10
Inspect o-ring of torch
5. Inspect the o-ring on the torch. If it shows
signs of wear or damage, replace it. If it is dry,
lubricate it with a thin film of lubricant supplied with
spare parts kit
6. Install the nozzle and the electrode assembly
into heat shield and thread heat shield onto torch.
The shield should be tightened fully to insure good
electrical contact for electrode and nozzle. "Fully"
means at least 3/16 inch of rotation after electrode
seat contacts electrode holder.
5.3.6 Measuring Torch Gas Flows
Flow Measuring Kit -- P/N 19765
Check gas flow if suspected of causing poor
cutting performance. Use Plasma Torch Flow
Measuring Kit. (P/N 19765)The kit includes a hand
held rotameter (flowmeter) that indicates the gas
flow rate exiting the torch. The kit also includes a
set of instructions that should be followed exactly
to insure safe and accurate use of the rotameter.
Total air flow rate in the PT-20AMX should be
325cfh minimum with any nozzle at 75 psi.
