13
NEPTUNE PE
7.1 Maintenance Schedule
7 Maintenance
7.2 Maintenance work
7.2.1 Water fi lters
1. Unscrew quick coupling.
2. Remove fi lter with tool and
clean it.
Weekly
NEPTUNE
5-51 DE / 5-85 PE
only
After the fi rst 50
operating hours
Every six
months or
500 operating
hours
As
required
7.2.1 Water fi lters
7.2.2 Oil fi lter
7.2.3 Checking the pump oil quality
7.2.4 Changing the pump oil 
7.2.5 Emptying the fuel oil tank
7.2.6 Flame Sensor
Service on engine: See attached user instructions for engine.
7.2.2 Checking the pump oil
quality
1. Check color of pump oil.
If the oil has a grey or white
shade, change the oil (see
chapter 7.2.3)
2. Top off oil level with fresh oil
if necessary.
Oil type see chapter 9.4
Technical Specifi cations.