© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
Page 60
PREVENTATIVE MAINTENANCE
COOLANT SYSTEM
BLOWING OUT RADIATOR FINS
Note:
Make sure radiator is cool before blowing out the
radiator fi ns with compressed air.
REVERSE FLOW FLUSHING
1. At the engine, disconnect the hoses.
2. Make sure the radiator cap is on tight.
3. Using a hose clamp, attach a fl ushing gun onto the lower
hose.
4. Turn on the water and fi ll the radiator.
5. To keep from damaging the radiator, apply air pressure
slowly and carefully.
6. Shut off the air pressure, refi ll the radiator with water, and
reapply the air pressure. You will need to repeat these
steps until water fl ushed from the radiator runs out clear.
7. Inspect and clean the radiator cap.
8. Inspect and reconnect the hoses.
9. Refi ll the radiator with coolant.
Note:
Use a 50/50 mixture of water and an anti-freeze with
an ethylene glycol base.
LUBRICATION
For all engine fuel types: Use a current API (American
Petroleum Institute) Oil Service Classifi cation that is suited to
seasonal temperatures.
Refer to the Engine Manufacturer’s Operator Manual for
these specifi cations.
CHANGING ENGINE OIL
1. Place a drain pan under the lowest end of the engine.
2. Remove the drain plug and allow the oil to drain into the
pan.
3. Remove the used oil fi lter and replace with a new one.
4. Dispose of the oil and oil fi lter in an approved manner.
5. Remove the engine oil cap, add oil in the amounts listed
in the engine manual, then secure the cap.
