Husqvarna PP 418 用户手册

SYSTEM MAINTENANCE
Daily 
1. Check hydraulic oil level.  Make sure that the oil level on 
the sight glass is above the lower limit indicated.  Add oil as 
needed.

Oil Tank volume:   10 liter (2.6 gal) 
Oil Type:  

ISO 46 (see page 8)

Hydraulic Filter (large):

510 02 33-01       25 Micron fi lter

Hydraulic Filter (small):

542 16 64-49        25 Micron fi lter

NOTICE: Never use automotive type oil fi lters.
They do not have the required fl ow capacity and can burst 
during operation.

Replacement Frequency: 

Both Filters  -  After 1st 50 hours,

                                 then every 100 hours

Hydraulic Oil  -  Every 100 hours

                       or once a year

2.  Check for any leaks or kinks on the hydraulic hoses or any 
other leaks at couplers and fi ttings.

3  Check oil cooler for any debris and dirt buildup.  Remove 
debris with air pressure or spraying with a garden hose.  Do 
not use a high pressure washer directly on the cooler.

WATER CONTAMINATION
In humid climates the hydraulic system can collect large 
amounts of water condensation in the oil tank.  This happens 
due to the humid air in the tank changing from getting hot and 
cold.  Small amounts of water condensation will not be 
noticeable.  If large amounts of water are present, the oil will 
“foam” or turn “white”.  The power pack and other hydraulic 
tools should not be operated with water contaminated oil.

If water contamination occurs you should replace the oil and 
fi lters.  In some cases it is feasible to remove the water 
contamination out of the oil.  The hydraulic hoses should also 
be emptied.   

Procedure for removing the water:
1.  Install the hoses and connect the ends together.  
2.  Start the engine and turn on the fl ow selector to the
     40 liters (10 gal)
3.  Let the engine operate for 5 minutes at this fl ow 
     setting.
4.  Turn of the engine and drain the oil tank in an 
     appropriate container.  Preferably – remove the quick
     couplers on the hoses and drain oil into a container.
5.  The water in the contaminated oil will settle at the
      bottom of the container in approximately 24 hours.  
      The oil will now appear “normal”.
6.  Carefully pour the clean oil back into the tank – 
      leaving the water in the container. 
7.  REPLACE the oil fi lters.

REPLACING OIL AND FILTER
Remove the 4 screws as indicated below.  This will enable full 
access to the large oil fi lter.

 

 

 

 

 

ALWAYS REPLACE

both fi lters and oil 

every 100 hours 

 

 

OIL TANK 

Drain plug.

 

TROUBLESHOOTING THE HYDRAULIC SYSTEM 
To adequately diagnose and troubleshoot any problems relat-
ed to the hydraulic system it is necessary to have a hydraulic 
tester consisting of a fl ow meter and pressure gauge.  Never 
readjust the pressure relief valve without the proper hydraulic 
diagnostic tool.