Nortec HP Series - Manual (Page 45)

HP Series Installation Manual | 42
Danfoss Stainless Steel Axial Piston Pump
1 The stainless steel axial piston pump is water lubricated and does not require any
maintenance. This pump has a lifespan of 8000 hours, after which time pump wear will
reduce its efficiency. If the pump is removed from service at 8000 hours it can usually be
rebuilt and receive another service life.
2 The service indicator light will illuminate after 7900 hours of operation. The pump will
continue to operate for another 100 hours after which time the service and fault indicators
will illuminate and the pump will shut down. Nortec recommends replacing the pump at this
time. Contact your local Nortec representative for further information.
3 After the pump head has been changed, press the reset switch inside the pump controller
housing to reset the service indicator and 8000 hour counter.
Resetting the counter without changing the pump head will allow the pump to be run to
destruction without further warning. Nortec strongly recommends against this, and cannot
offer warranty on downstream components damaged by pump debris resulting from pumps
run past 8000 hours.
Electrical Motor Service
1 Two types of electrical motors are used to drive the pumps; those with sealed rotor bearings
and those with external greased bearings. The sealed rotor bearing types are maintenance
free, while the external bearing types require periodic lubrication. Please refer to the
nameplate on the motor to identify which motor you have.
Table 4. Electrical Motor Service
Operation Service Interval
Standard (6 hours/day Every 3 years
Severe (18 hours/day) Every year
Seasonal (2000 hours per season) Beginning of each season
Table 5. Lubricant Volumes
Frame Size
Relubrication Amounts
Volume cu. in. Fluid oz.
56 0.25 0.14
145 0.25 0.14
180 0.50 0.28
210 0.75 0.42
2 Electrical motors on the pump modules are pre-greased with a polyurea mineral oil NGLI
grade 2-type grease unless stated otherwise on the motor nameplate. Some compatible
brands of polyurea mineral base type grease are: Chevron SRI#2, Rykon Premium #2, Shell
Oil Doilum R, and Texaco Polystar RB. Motors are properly lubricated at time of manufacture
and do not need to be lubricated at the time of installation.