User's Manual

Service
312147B 7
Service
1. Follow the Pressure Relief Procedure on page 3.
2. Lubricator operation can be checked by observing
the drip tube. If the correct pumping rate is main-
tained, no servicing is required other than periodic
replenishment of the reservoir. If the sight glass well
pumps dry or no flow is observed, check the follow-
ing points until the cause is determined and cor-
rected.
a. Check the vent plug for proper sealing. Any
nicks or cracks will cause an air leak into the
sight glass.
b. Check shaft rotation. If the lubricator shaft is not
rotating, determine the cause and repair as nec-
essary.
c. Check oil level and viscosity. Be sure the reser-
voir is filled with oil.
d. Check pump priming. If necessary, prime the
pump in accordance with the “Operating
Instructions”.
e. Check the feed adjustment and readjust if the
pumping rate is too low.
f. Check the actuating linkage for proper opera-
tion. If defective, isolate the broken part and
repair or replace as required.
3. If none of the above steps isolate the malfunction,
the cause is in the pump assembly. The following
items should be checked before removing the pump
assembly from the cover.
a. Check the sight for inward leakage due to a
crack in the sight glass, improper sight glass
seating, or a defective o-ring. Repair as
required.
b. Check for an obstruction in the drip tube and
remove if found.
4. If these steps do not isolate the malfunction, discon-
nect the discharge tubing and remove the pump
assembly which is attached to the cover with two
screws. It is not necessary to stop the equipment on
which the lubricator is installed or to empty the res-
ervoir. A spare pump should be on hand for use dur-
ing emergencies when a pump is being repaired.
5. If the sight glass fills with lubricant proceed as fol-
lows:
a. Remove the vent plug and allow the lubricant to
pump down to the proper level. Replace the
vent plug. The pump should operate normally.
b. If the sight glass continues to fill with lubricant
check all terminal check valves for proper oper-
ation. If the valves are operating properly,
remove and clean the pump assembly, then
reinstall the pump in the system and check
operation.
6. If the sight glass still fills with lubricant it may be
caused by temperature variation.
a. When the unit is not operating, remove the vent
plug and allow the lubricant to pump down to
the proper level. Replace the vent plug. The
pump will now function properly. The sight glass
may fill with fluid without affecting the operation
of the lubricator as long as the drip tube
remains above the lubricant level to show the
rate of pumping.
b. When the unit is operating, the sight level will
vary depending on temperature variations. If the
level falls to less than 1/4 inch above sight glass
flange, add lubricant to the proper level (3/8 inch
below the discharge of the drip tube) through
the vent hole. If the level is too high, remove the
vent plug and allow the unit to pump down
before replacing the vent plug.
CAUTION
The installation and all work concerning assembly,
maintenance, and repair must be completed by qual-
ified personnel.