STORAGE & MAINTENANCE INSTRUCTIONS
Engine
The engine instructions that accompany your unit detail specific procedures for maintenance of the engine. Fol- lowing the engine manufacturer’s recommendations will extend engine work life.
Pump
The pump oil must be changed after the first 25 hours of operation on all units. Once the initial oil change has been completed, it is recommended the oil be changed every 3 months or 250 hour intervals. If oil appears dirty or milky, changes may be required at a greater frequency. Add pump oil and fill only to the center of the sight glass (Refer to the parts listing for the correct pump oil). Do not overfill.
Nozzles
Water flow through the spray nozzle will erode the ori- fice, making it larger, resulting in a pressure loss. Noz- zles should be replaced whenever pressure is less than 85% of the maximum. The frequency of replacement will depend upon such variables as mineral content in the water and number of hours the nozzle is used.
Quick Couplers
There is an
STORAGE & MAINTENANCE
INSTRUCTIONS
Winterizing
For storage and transportation purposes in subfreezing ambient temperatures, it will be necessary to winter- ize this unit. This unit must be protected to the lowest incurred temperature for the following reasons:
•If any part of the pumping system becomes frozen; excessive pressure may build up in the unit which could cause the unit to burst resulting in possible serious injury to the operator or bystanders.
•The pumping system in this unit may be permanently damaged if frozen. Freeze damage is not covered by warranty.
If you must store your unit in an area where the tem- perature may fall below 32°F, you can protect your unit by following the procedure outlined below.
32˚F 
0˚C
NOTICE
Do not store/operate unit in a freezing environment. Damage to washer could occur.
Gather the following items:
•Two 5 gallon containers.
•One gallon of antifreeze. (Graco® recommends an environmentally safe antifreeze.)
•Water supply.
•Three foot hose,
Procedure:
1.To start winterizing, unit must be run and primed according to the
12.
2.After running and priming, shut off the unit and water supply.
3.Relieve system pressure by pointing the trigger gun in a safe direction and squeezing the trigger until water flow ceases to exit the nozzle.
4.Lock the trigger gun in an OFF position and remove the nozzle.
5.In one 5 gallon container, mix the antifreeze and water according to manufacturer’s recommendations for the temperature to which you are winterizing.
Note: Proper winterizing is based on the recommend- ed manufacturer’s instructions listed on the “Protec- tion Chart” shown on the back label of most antifreeze containers.
6.Remove the water supply hose from the unit and attach the 3 foot hose securely to the inlet connection. Submerge the other end into the antifreeze solution.
7.Shut off the detergent injector if applicable.
8.Point the wand into the empty container and start the unit.
9.Trigger the gun until the antifreeze begins to exit the wand. Release the trigger for 3 seconds, then trigger the gun for 3 seconds. Continue cycling the gun several times until all the antifreeze mixture is siphoned from the container.
10 Stop the unit.
11.Detach the 3 foot hose from the unit and drain any excess antifreeze back into the 5 gallon container.
12Disconnect the hose/gun/wand assembly from the unit and drain any excess antifreeze back into the 5 gallon container.
13.Store the hose, gun and wand with the unit in a safe,
14.Store antifreeze solution for next use or dispose of according to state EPA laws.
Optional Procedure:
1.Shut the unit and water supply off.
2.Relieve system pressure by pointing the trigger gun in a safe direction and squeezing the trigger until water flow ceases to exit the nozzle.
3.Disconnect and drain the hose, gun and wand.
4.Start the unit and allow it to run until all the water exits the unit. Once the water has stopped flowing from the unit, turn the unit off.
NOTICE
When using this procedure, caution should be used as ice chips can form from drops of water which could cause the unit to burst if starting before com- pletely thawed.
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