Gorman-Rupp Pumps 4D-X3 1P - Manual (Page 32)

D SERIES OM--01515
MAINTENANCE & REPAIR PAGE E -- 16
Apply No. 2 lithium base grease to the upper lubri-
cation fitting (26) until grease escapes from the end
cap (27).
Apply No. 2 lithium base grease to the lower fitting
(7, Figure 3) until grease escapes from the top of
the upper diaphragm plate inside the spring.
Gearbox
(Figure 4)
The speed reducer was fully lubricated when
shipped from the factory. Change the oil in a new
gearbox at operating temperature after 100 hours
of operation or four weeks which ever comes first.
To drain the oil, remove the oil drain plug at the bot-
tom of the gear housing cover and the vented plug
at the top of the gear housing cover. Flush the case
thoroughly with a light oil. Clean and reinstall the oil
drain plug.
To fill the speed reducer, remove the oil level plug in
the side of the gear housing cover, and add new oil
of the proper grade (see the following reference)
through the vented plug hole until it flows out the oil
level hole. Clean and reinstall the vented plug and
the oil level plug.
Under normal conditions, drain the gearbox every
500 hours of operation or every six months.
Change the oil more frequently if the pump if oper-
ated under severe conditions, continuously or in-
stalled in an environment with rapid temperature
change.
Monitor the condition of the bearing lubri-
cant regularly for evidence of rust or mois-
ture condensation. This is especially im-
portant in areas where variable hot and
cold temperatures are common.
The following lubricants are recommended:
Lubricant Manufacturer
No. 4 Gear Oil AGMA Lubricant
Meropa Lube No. 6 Texaco
Mobilgear No. 634 Mobil Oil
Sunep No 1150 Sun Oil
Valvata Oil No. J78 Shell Oil
If none of the recommended lubricants are avail-
able, use SAE No. 90 multi-purpose gear oil at am-
bient temperatures of +40 _F (4_C) to +120 _F
(49_C, and SAE No. 80 multi-purpose gear oil at
temperatures below +40 _F (4_C).
Motor
Refer to the motor manufacturer’s recommenda-
tions or contact your local motor representative.