OPERATION
4.Cleaning a Clogged Tip
WARNING
To reduce the risk of serious bodily injury from injec- tion, use extreme caution when cleaning or chang- ing spray tips. If the spray tip clogs while spraying, engage the gun safety latch immediately, then fol- low the procedure in Steps 4a to 4e, below.
NEVER wipe off buildup around the spray tip until pressure is fully relieved and the gun safety latch is engaged.
a.Clean the front of the tip frequently during op- eration. First relieve pressure; see page 9. Then use a solvent±soaked brush to clean the tip and to reduce fluid build up and tip clogging.
b.If the spray tip does clog, release the gun trig- ger, and engage the gun safety latch.
c.If using the RAC IV Spray Tip Kit, rotate the RAC IV handle 180_. See Fig 5. Disengage the gun safety latch. Trigger the gun into a grounded waste container. Engage the gun safety latch again. Return the handle to the original position.
If using a spray tip kit which is not
d.Disengage the gun safety latch, and resume spraying.
e.If the tip is still clogged, engage the gun safety latch, shutoff and unplug the sprayer, and open the pressure drain valve to relieve pressure. Re- move the spray tip and clean it.
f.Instructions for cleaning the RAC IV are given in manual 307±848.
ROTATE HANDLE 180_
Fig 5
SHUTDOWN AND CARE
1.Check the packing nut/wet±cup daily. First relieve pressure; see page 9. Be sure the wet±cup is 1/3 full of TSL at all times to help prevent fluid buildup on the piston rod and premature wear of packings. The packing nut should be tight enough to stop leakage, but no tighter. Overtightening may cause binding and excessive packing wear. See Fig 6.
2.Clean the fluid filter often and before storing the sprayer. First relieve pressure; see page 9. See man- ual 307±273, supplied, for the filter cleaning proce- dure.
3.Flush the sprayer at the end of each work day and fill it with mineral spirits to help prevent pump corro- sion and freezing. See FLUSHING GUIDELINES on page 12.
CAUTION
Never leave water or any paint in the sprayer over- night to: (1) prevent pump corrosion; (2) prevent the fluid from freezing in the pump and pressure control which can cause loss of pressure, stalling or serious sprayer damage.
Always use mineral spirits for the final flush, relieve pressure and leave the mineral spirits in the sprayer.
4.For very short shutoff periods, leave the suction tube in the paint, relieve pressure, and clean the spray tip.
5.Coil the hose and hang it on the hose rack when stor- ing it, even for overnight, to help protect the hose from kinking, abrasion, coupling damage, etc.
6.For the low±profile cart, use the brackets on the side of the cart to hold the suction assembly.
WARNING
Refer to the warning section HOSE SAFETY on page 3 for information on the hazard of using dam- aged hoses.
PACKING NUT/WETCUP Keep filled with TSL during operation. Tighten nut by turning clockwise
Fig 6