Gorman-Rupp Pumps 03H1-GR 287634 and up - Manual (Page 33)

OM-01194 0 SERIES
MAINTENANCE & REPAIR PAGE E - 13
Gearbox
(Figures 2 and 5)
The gearbox was fully lubricated when shipped
from the factory. Check the oil level regularly at the
oil level pipe plug(s) as shown in Figure 5. When
lubrication is required, add gear oil through the
hole for the air vent (4) the oil level reaches the level
shown in the illustration. Clean and reinstall the air
vent plug and pipe plug. Do not over‐lubricate. Ov­
er‐lubrication can cause the bearings to over‐heat,
resulting in premature bearing failure.
Change the lubricant in a new gearbox after 100
hours of operation or four weeks, whichever
comes first, by draining at operating temperature
and thoroughly cleaning with a flushing oil.
After break‐in, drain the gearbox after every 500
hours of operation or every six months, whichever
comes first, under normal operating conditions.
Change the oil more frequently if operated under
severe conditions.
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.
Add 2 ounces (59 ml) of `Molykote M' Gear Guard,
then fill with premium quality, multi‐purpose ex­
treme pressure gear lubricant as indicated below.
SAE #80 - Below 40
_
F (4
_
C)
SAE #90 - 40
_
-100
_
F (4
_
-38
_
C)
SAE #140 - 100
_
-150
_
F (28
_
-66
_
C)
Figure 5. Gearbox Lubrication Positions