-70-
Model G0740 (Mfg. Since 11/12)
The coolant system consists of a fluid tank, pump,
and flexible nozzle. The pump pulls fluid from the
tank and sends it to the valve, which controls the
flow of coolant to the nozzle. As the fluid leaves
the work area, it drains back into the tank through
the chip drawer and catch tray where the swarf is
screened out.
Use Figures 110–111 to identify the locations of
the coolant system controls and components.
Although most swarf from machining operations is
screened out of the coolant before it returns to the
tank, small particles will accumulate in the bot-
tom of the tank in the form of sludge. To prevent
this sludge from being pulled into the pump and
damaging it, the pump’s suction tube is positioned
a couple inches from the bottom of the tank and
fitted with a fine screen. This works well when the
tank is regularly cleaned; however, if too much
sludge is allowed to accumulate before the tank
is cleaned, the pump will inevitably begin sucking
it up.
Hazards
As coolants ages and gets used, dangerous
microbes can proliferate and create a biological
hazard. The risk of exposure to this hazard can
be greatly reduced by replacing the old fluid on a
monthly basis, or as indicated by the fluid manu-
facturer.
The important thing to keep in mind when work-
ing with the coolant is to minimize exposure to
your skin, eyes, and lungs by wearing the proper
PPE (Personal Protective Equipment), such as
long-sleeve waterproof gloves, protective clothing,
splash-resistant safety goggles, and a NIOSH-
approved respirator.
Figure 110. Coolant controls.
Figure 111. Additional coolant components.
Pump & Reservoir
(Inside Cabinet)
Catch
Tray
Chip Drawer
Nozzle
& Valve
Lever
Coolant
Pump
Switch
Coolant System
Service
BIOLOGICAL & POISON
HAZARD!
Use the correct person-
al protection equipment
when handling coolant.
Follow federal, state,
and fluid manufacturer
requirements for proper
disposal.
