SERvICE INSTRUCTIONS
1. Lubricator operation can be checked by observing the drip
tube. If the correct pumping rate is maintained, no servicing
is required other than periodic replenish ment of the reservoir.
If the sight glass well pumps dry or no flow is observed,
check the following points until the cause is determined and
corrected.
• Check the vent plug for proper sealing. Any nicks or
cracks in the rubber plug will cause an air leak into the
sight glass.
• Check shaft rotation. If the lubricator shaft is not
rotating, determine the cause and repair as necessary.
• Check oil level and viscosity. Be sure the reservoir is
filled with oil, and if necessary heat the reservoir to
maintain viscosity at the correct level for the desired
flow.
• Check pump priming. If necessary, prime the pump in
accordance with the “Operating Instructions”.
• Check the feed adjustment and readjust if the pumping
rate is too low.
• Check the actuating linkage for proper operation. If
defective, isolate the broken part and repair or replace
as required.
2. 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.
• 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.
• Check for an obstruction in the drip tube and remove if
found.
3. If the above steps do not isolate the malfunction, disconnect
the discharge tubing and remove the pump assembly which
is attached to the cover with four screws. It is not necessary
to stop the equipment on which the lubricator is installed
or to empty the reservoir. Faulty pumps should be returned
to the fac tory for repair as they contain a selectively fitted
cylinder and plunger. A spare pump should be on hand for
use during emergencies when a pump is being repaired.
4. If the sight glass fills with lubricant proceed as follows:
• Remove the vent plug and allow the lubricant to pump
down to the proper level. Replace the vent plug. The
pump should operate normally.
• If the sight glass continues to fill with lubricant check all
terminal check valves for proper operation. If the valves
are operating properly, remove and clean the pump
assembly, then re install the pump in the system and
check operation.
• If the sight glass still fills with lubricant it may be caused
by temperature variation.
1) 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.
2) When the unit is operating, the sight level will vary
depending on temperature variations. If the level
falls to less than 1/4inch 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.
5. Other servicing that may be required is listed below:
• Periodic cleaning of the lubricator is desirable to
eliminate contamination that may have occurred in the
oil. To accomplish this, remove all pumping units and
clean the pumps and reservoir by brushing loose all
foreign matter, dipping in solvent and blowing dry with
compressed air.
• If external leakage is observed, determine the cause
(loose bolts, defective gaskets, or seals) and repair as
required.
All written and visual data contained in this document are based on the latest product information available at the time of publication. Graco reserves the right to make changes at any time without notice.
Contact us today!
To receive product information or talk with a Graco representative,
call
800-533-9655
or visit us online at
www.graco.com.
©2006-2011 Graco Inc. Form No. L40240 Rev. C 12/11 Document is available in electronic format only. All other brand names or marks are used for identification purposes and are trademarks of their
respective owners. All written and visual data contained in this document are based on the latest product information available at the time of publication. Graco reserves the right to make changes at any
time without notice.
