Periodic inspection. For frequency and scope of periodic inspection, consult operation and service
instructions manual for specific bending machine; however, the following shall be used as a general guide.
Visually Inspect tube-bending machine for cracks, loose bolts and nuts, mounts for security, and
defective or damaged parts.
Lubricate tube-bending machine as required.
Master Gauge Unit. This unit consists of a pressure gauge, a manual control valve, and length of flexible
hose with connecting fittings. A typical unit is shown in figure 3-5
Replace flexible hose when it becomes frayed, cut, or deteriorated.
Replace gauge or control valve when found to be defective.
Figure 3-5. Typical Master Gauge Unit