4.0 MAINTENANCE
VCX-Series vacuum pumps require very little maintenance. To ensure optimum performance, the
following maintenance steps should be followed:
4.1 Gear Box Lube Oil
4.1.1 Gear Oil Level
Check the oil level on monthly basis. Under normal circumstances it should not be necessary to add oil
between oil changes. A significant drop in oil level could indicate an oil leak. If the pump is leaking oil,
please check the o-rings, drain plug or oil sight glass.
Check the oil level only when the pump is shut off. Replenish oil if it drops below bottom position of the oil
sight glass.
Caution: Do not add oil while the pump is running. Hot oil can escape from the oil fill port.
4.1.2 Gear Oil Type and Quantity
Oil level should be at the 3/4 position on the oil sight glass. We recommend using Airtech Part Number
ATO-3000-01, which is supplied by Airtech. The following table gives the approximate quantities of oil
required for each model.
Pump Model Capacity (liter)
VCX 60 0.60
VCX 155 / VCX205 0.5
VCX 100 / VCX100B / VCX 150 / VCX150B 0.75
VCX 250 / VCX250B / VCX 300 / VCX300B 1.10
VCX 255 / VCX 305 0.90
VCX 400/ VCX 505 1.10
VCX 515 1.80
Do not add fill oil with pump running! Do not overfill.
4.1.3 Gear Oil Change
Under normal ambient conditions with proper gear oil, oil needs to be changed every 5,000 operating
hours. We recommend performing the first oil change after 500 - 1,000 operating hours.
Caution: If different brand of oil is being filled, the old oil must be drained completely from the
gear box.
4.1.4 Grease Supply on the bearings (Applies only to VCX 400/500)
Apply fresh grease (Airtech Part Number ATG 5400) to the bearings every 5000 operating hours, but
check the condition of grease more frequently if the pump is operating in an environment with an ambient
temperature over 68° F (20° C) and add grease when necessary. Do not over-grease. About 30 grams of
grease should be applied to each bearing. The grease can be applied with a grease gun by opening the
front cover.
Caution: The interval of lubrication stated above is based on ambient temperature of 68° F (20°C).
At 104° F (40°C) ambient temperature, the interval may be reduced to 2,500 operating hours.