
UNIBLOC-PD Operation & Service Manual: PD600-677 13
4.3 Maintenance Schedule and Recommended Spare Parts
It is recommended to install pressure gauges on both sides of the pump so that any problems with the pump or
pipelines can be monitored. It is also recommended to have shut-off valves on both sides for easy isolation of pump if
manual service is required.
The
UNIBLOC-PD
bearing housing is supplied permanently lubricated with nitrile seals. However, for certain applica
-
tions and at the user’s request, drain plugs and a vent will be supplied. When applications exceed constant service
temperatures of 180º C (356º F) a vent and high temperature lubricant must be used. For such cases, contact Uni
-
bloc-Pump or your supplier for an adequate service schedule.
Recommended weekly maintenance control to include:
• Control of oil levels in pump bearing housing and gear reducer. (Change once per year or after 2000 hours
of operation, whichever comes first)
• Control of oil seal leakage
• Control of shaft seal leakage
• Control of pump medium leakage
Allow the pump to cool down after shut down prior to inspection.
Recommended spare parts
• 1 set of shaft seals
Qty 2
• 1 set of front oil seals Qty 2
• 1 set of rear oil seals Qty 1
• 1 wet-end o-ring kit
Qty 1 (5 o-rings)
• 1 wet-end o-ring kit (for Metal Rotors) Qty 1 (5-9 o-rings depending on shaft style)
4.4 Shaft Seal Service
DISENGAGE POWER TO THE MOTOR
before proceeding with the following steps. If the pump is connected
to piping, depressurize the system and close valves on both the suction and discharge sides to isolate the pump
from the rest of the system. Disconnect the piping from the pump. If service is to be performed while the pump is still
mounted to the system, disconnect the motor drive coupling or the electrical connection to the motor.
To aid in the removal and installation of the shaft seals, use plastic mounting sleeves with the same
diameter as the shafts seal area. The sleeves also protect the seals from the shaft splines. They can be
obtained from Unibloc-Pump. Contact your supplier for details.
4.4.1 Front Cover & Rotor Removal
4.4.1.1 Front Cover Removal
Remove the
Front Cover Nuts
,
Front Cover,
and
Front Cover O-ring (see fig. 4.1)
.
FRONT COVER NUTS
FRONT COVER
FRONT COVER O-RING
fig. 4.1