UGSI Encore 700, Operation And Maintenance Manual

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CF.440.400.001.IM.0417
ENCORE
®
700 METERING PUMP
34
4.3.1 Gearbox Lubrication (Refer to Dwg. 440.400.000.010)
The gearbox is fi lled with approximately two quarts of Bel-Ray Worm Gear Oil
460, (Product Code 11000). This lubricant must be replaced annually to realize
optimum performance of the mechanism. The fi rst oil change is
recommended after six months of operation.
NOTE: Do not mix oils.
To drain and replace the gearbox oil, perform the following steps:
a. Remove the oil drain plug (33) located at the bottom of the side wall of the
gearbox (toward the stroke control knob). Catch the oil with an appropriate
container.
b. Let the oil drain completely and fl ush the gearbox using suitable detergents.
c. Apply PTFE tape to the oil drain plug and install it to the gearbox.
d. Remove the breather cap (44) located at the top of the gearbox cover and
the oil check plug (36) located at the center of the gearbox side wall (toward
the stroke control knob)
e. Fill the gearbox with oil (U40003) until the oil fl ows out of the oil check
hole.
f. Apply PTFE tape to the oil check plug; thread and tighten.
g. Install the breather cap.
4.3.2 Priming Troubles or Loss of Suction
Diffi culties in priming are usually encountered when there is an air leak in the
suction line or when the valves are obstructed. Air leaks in the suction line may
be due to a loose valve, O-ring damage, cracked tubing, or leaking joints in the
pipe thread connections. Obstruction on the valves may be caused by foreign
material or by deposits on the pumping head parts.
Where liquid is withdrawn from containers that are replaced when they are
empty, or if the level in a fi xed tank occasionally falls below the suction line
inlet, air will be introduced into the pump. If the pump is discharging against
atmospheric pressure (or only slightly above), the pump may be expected to
re-prime itself if the liquid supply is replenished and it is operated briefl y at
full stroke. If discharging against greater pressures, the pump will not re-prime
itself due to compression and re-expansion of the air trapped in the pump head.
If the system is installed in accordance with Dwgs. 440.400.110.030 or