Ensure that the pump is correctly filled with coolant, as described below. Failure to observe these instructions
may result in an air-lock developing in the cooling-jacket and the pump overheating.
Note: Edwards coolant is available as a spare: refer to Section 7.3.
The pump is supplied filled with coolant. Use the following procedure to check the coolant level before operating
the pump:
1. Refer to Figure 7, detail B. Press down the coolant filler cap (6), turn it anticlockwise and remove it from the
heat exchanger (2).
2. Remove any dirt or water-scale from the seal of the filler cap (6) and from the filler tube (5).
3. Check the level of coolant in the coolant level sight-glass (3); if it is below the minimum level, continue at Step
4, otherwise continue at Step 7.
4. Remove the cap from a new container of coolant. Place a clean funnel into the container and fill the container
with clean water.
5. Replace the cap on the container, shake the container to fully mix the water and coolant, then remove the cap.
6. Pour the coolant mixture through the filler tube (5) and into the heat exchanger until the coolant level reaches
the filler tube. Repeat Steps 4 to 6 to mix and add more coolant as necessary.
7. Refit the coolant filler cap (6); press it down and turn it clockwise to secure it to the pump.
8. Check the pump for obvious signs of a coolant leak. If there are signs of a coolant leak, contact the supplier or
Edwards for advice.
3.5 Check the oil levels
The pump is supplied filled with oil. Before operating the pump, use the following procedures to check the oil levels
in the pump.
3.5.1 Check the gearbox oil level
Check that the gearbox oil level is correct. Refer to Figure 1, 2 or 3 for the locations of the two gearbox oil level
sight-glasses (18) on the pump:
z See detail D. When the pump is off, the oil level should completely fill the sight glasses so that when the
pump is running the oil level is between the MIN and MAX marks on the bezel (26) of either of the two
oil level sight-glasses.
z If necessary, pour more oil into the gearbox: refer to Section 5.3.1.
3.5.2 Check the end cover oil level
Check that the end cover oil level is correct. Refer to Figure 1, 2 or 3 for the locations of the two end cover oil level
sight-glasses (11) on the pump:
z See detail D. When the pump is off, the oil level should completely fill the sight glasses so that when the
pump is running the oil level is between the MIN and MAX marks on the bezel (26) of either of the two oil-
level sight-glasses.
z If necessary, pour more oil into the end cover: refer to Section 5.3.2.
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