1.Always stop the pump a the bottom of Its stroke when you take a break and at the end of the day. This helps keep fluid from drying on the rod and damaging the packings.
2.Keep the displacement pump packing
3.Check the tightness of the packing nut daily. It should be tight enough to stop leakage, but no tighter. Overtightening will damage the packings.
Proper engine and hydraulic oil level is important to prevent costly damage to the sprayer. Check it as often as recommended in Steps 4 and 5, below.
4.Check tha hydraulic oil level weekly. The oil must be up to the top mark on the dipstick (25). Use only Graco Hydraulic Oil, see ACCESSORIES.
5.Check the engine oil level at least weekly. The oil must be up to the top mark on the dipstick with the fill cap unthreaded. The engine should not use more than one ounce of oil per hour of operation. Consult the engine manual, supplied, for additional recommended maintenance.
6.Inspect the return line filter. (65) frequently for clogging. Replace it after every 500 hours of opera- tion or every six months, whichever comes first. A clogged or worn out filter reduces filter capability and will damage the hydraulic pump.
7.Change the hydraulic oil after every 2000 hours of operation or every 12 months, whichever comes first. For continuous operation in temperatures above 85°F (30°C), change the oil after every 1000 hours or six months of use. Refer to Step 8 for pro- cedure.
Cleanliness is essential when servicing the hydraulic system. Use special care to avoid get- ting dust or dirt into the hydraulic system to pre- vent damage to the hydraulic components.
8.To change the hydraulic oil:
a.Follow the Pressure Relief Procedure Warn- Ing, on page 8. Allow the oil to cool before pro- ceeding.
b.Place a waste container under the drain plug (7) of the hydraulic reservoir. See Fig 11. Unscrew the plug, and drain the reservoir. Reinstall the plug before proceeding.
c.Remove the nuts (4) and reservoir (66).
d.Remove the return line filter (55) and install a new filter assembly.
e.Inspect the inlet filter (21) and replace if needed.
f.Install the reservoir and nuts. Then pour in
Fig 11 ________________
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