DEKKER Vacuum Technologies, Inc. – HullVac / September 2016
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Oil Change Procedure
Run the pump until normal operating temperature is achieved. (140-160°F as measured on the oil solenoid
valve). Run the pump for at least 1 hour prior to draining the oil. This will warm the oil to facilitate faster
and more complete draining.
CAUTION: OIL WILL BE HOT!
Follow these steps to drain the oil:
Disconnect main power to pump.
Vent the inlet to atmosphere for 10 to 15 seconds. This will force the oil from the lower pumping
chambers into the upper reservoir.
Open the oil drain valve and allow the oil to drain completely.
Close the oil drain valve and rotate drive belts by hand with the inlet open to atmosphere for 5 – 10
rotations, then open the drain valve again to scavenge residual oil. This will force residual oil from the
pumping chamber into the oil reservoir where it can be drained.
Follow these steps to fill with new oil:
Close the oil drain valve and fill the reservoir to the 2/3 site-port level by pouring oil through the oil
fill port located on top of the pump.
Reconnect main power to pump.
Close the inlet isolation valve so that the pump is blanked-off. Run the pump for 2-3 minutes. Check
the oil level.
Add oil until the site port level is between 1/2 and 2/3 level in the site port. If overfilled, open drain to
drain off excess and re-run unit to confirm oil level.
The approximate oil capacities are given in the Standard System Capacities table below.
Standard System Capacities
System
Capacity (gal)
HV55A
0.9
HV140A
3.3
HV160
4
HV412XT
12
HV450
13
HV635
15
HV850
25
HVC35A
0.9
HVC65
2.5
HVC100A
3.3
HVC180
6.5
HVC340
20