6
fully open in the system, to prevent the pump from running under pressure
without liquid, which could damage the pump.
Note: Due to the low ambient temperature in winter, please remember to run
with this method to protect the pump head from freezing.
Pump operation
(1) Check the oil level before running. The oil must be replace after 50 hours of the first
operation. After that, oil will be renewed for about 200 hours each time.
(2) All the bolts of the pump must be tightened.
(3) During the operation, the lubricating oil’s temperature should not be more than
70 ℃, and the medium’s temperature should not be higher than 55 ℃.
(4) Replace the oil with the hot crankcase and empty the old oil. If there is iron solids in
the case, use magnets to clean up and plug oil hole. Then fill the new oil through the
oul hole (oil type and quantity are as the regulation). Too much oil will increase the
temperature of oil because of too much resistance in oil.
(5) The oil should be emptied at least once a year, and wash the crankcase with the
cleaning oil, then inject the new oil.
(6) Before changing the oil, check the water leakage and oil spilling, the check all seal
rings and packing seals, especially the seals for the sealing rods.
(7) Ensure the threaded connection between the plunger and the middle rod must be
tightened before running.
(8) The leakage of the intake and draining valve in the fluid end will reduce the flow of
the pump. So when the pump stops for a long time, it should be removed for
inspection. Check the valve plate, the valve seat, the O seal ring on the valve seat, and
enter the drain valve spring to see if they are worn.
(9) The bolts on the packing box and intake/draining valve must be symmetrical when
they are fastened.
(10) Stop the pump to check once any abnormal sound and vibration during the normal
operation.
(11) The safety valve has been adjusted in the factory. Please do not disassemble or
loosen the valve without authorization.
