Gorman-Rupp Pumps 04E1-GHH 1076270 and up - Manual (Page 47)

0 SERIES OM−03688
MAINTENANCE & REPAIR PAGE E − 22
After the initial change, the lubricant should be
changed after every 500 hours of operation or ev-
ery 6 months, whichever comes first. The lubricant
should be changes more frequently when the
pump is operated under severe conditions, such
as extremely dusty conditions or in areas where ex-
treme temperature changes are regularly experi-
enced.
Check the oil in the gearbox monthly, and maintain
it at the proper level. Check the gearbox monthly
for leaks.
Contaminated gearbox lubricant or metal
shavings on the magnetic drain plug may
indicate impending pump or gearbox fail-
ure. Monitor operation closely and sched-
ule maintenance accordingly.
Continuous Pumping Duty Cycle
For duty cycles which do not provide at least a 20
minute cool-down (non-pumping) period after
each 30 minutes of continuous pumping, the fol-
lowing lubrication schedule shall apply.
1. Change the lubricant in a new gearbox after
an initial break-in period of 10 hours and be-
fore 20 hours of operation. The lubricant
should be changed while the pump is at op-
erating temperature. Remove the magnetic
plug and gasket (65 and 66) and drain the
gearbox. Always clean the magnetic plug
thoroughly before reinstalling.
2. After the initial change, the lubricant should
be changed after every 40 hours of opera-
tion or 3 months, whichever comes first.