Graco Inc. Hydra-Clean 308-507 - Manual (Page 7)

308–507 7
SHUTDOWN, FLUSHING AND STORAGE
WARNING
Pressure Relief Procedure
To reduce the risk of serious bodily injury
,
including fluid injection and splashing in the eyes,
or on the skin, always follow this procedure
whenever you stop spraying for more than 10
minutes, when shutting down, and before
checking or repairing any part of the system.
1. Engage the trigger safety latch.
2. Turn the air supply off.
3. Disconnect the air supply.
4. Shut off the water supply.
5. Disengage the trigger safety latch and trigger
the gun to relieve pressure, and then engage
the trigger safety latch again.
6. Before long–term (overnight) storage or
transporting of the unit, disconnect the water
supply, and disconnect the air supply.
1. If the pressure washer will be exposed to freezing
temperatures, drain all water out of the pump. If it
must be stored in freezing temperatures, flush the
unit with a 50% anti–freeze solution. Relieve
pressure. Flush the pressure washer before using it
again to remove the anti–freeze.
CAUTION
If water does freeze in the pressure washer, thaw
it in a warm room before trying to start it. DO NOT
pour hot water on or into the pump!
2. After each use, wipe all surfaces of the pressure
washer with a clean, damp cloth.
3. Perform the appropriate maintenance. See
maintenance chart.
MAINTENANCE
Observing regular maintenance intervals helps ensure
that you get maximum performance and life from the
pressure washer.
WARNING
To reduce the risk of serious bodily injury ,
including fluid injection, splashing in the eyes or
on the skin, or injury from moving parts, always
follow the Pressure Relief Procedure Warning
before proceeding.
Interval What to do
Daily Clean water inlet screen and filter.
Lubricate air motor (if there is not automatic
oiling) by placing 15 drops of light machine
oil in the pump air inlet.
Each 40
hours of
operation
Check that the packing nut is tight. Tighten
snug. Overtightening will damage
packings. See the appropriate pump
Instruction-Parts List.
TROUBLESHOOTING CHART
WARNING
To reduce the risk of serious bodily injury, including fluid injection, splashing in the eyes or on the skin, or injury
from moving parts, always follow the Pressure Relief Procedure Warning before proceeding.
Problem Cause Solution
Pump does not
operate or no water
flow
Loose or broken pump parts.
Restricted line or inadequate air supply.
Exhausted water supply.
Clogged fluid hoses.
Fluid intake or piston valves need
adjustment.
Damaged air motor.
Disassemble, check, repair.
Clear, increase.
Refill.
Clean or replace.
Adjust.
See separate air motor Instruction Manual.
Pump operates but
output is low
Insufficient air supply.
Exhausted water supply.
Obstructed gun or tip.
Damaged pump packings.
Piston or intake valve worn or held open.
Increase.
Refill.
Clear.
Replace.
Repair. See separate pump Instruction Manual.
Frequent or
premature failure of
the packings
Running pump dry.
Abrasive material in the fluid being pumped.
Inlet water temperature too high.
Overpressurizing pump or excessive cycle
rate.
Do not run pump without water.
Install proper filtration on pump inlet plumbing.
Check water temperature; may not exceed 200 _ F
Check inlet air pressure. Adjust regulator if
necessary.
Erratic or accelerated
operation
Exhausted water supply.
Fluid intake or piston valve worn.
Refill.
Repair. See separate pump Instruction Manual.