Troubleshooting Chart - Graco Hydra-Clean 1235 Instructions-Parts List Manual

TROUBLESHOOTING CHART.
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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 on page
7 before proceeding.
PROBLEM
Low Pressure
Pump runs exiremely
rough, pressure low.
Water leakage from under
the manifold.
Water in pump crankcase.
Frequent or premature
failure of the packing.
and low pressure on the
Strong surging at the inlet
discharge side.
Unit will not start.
Chemical injection system
doesn't work.
CAUSE
Worn noale.
Coupling slippage.
Air leak in inlet plumbing.
Inlet filter clogged.
Worn packing. Abrasives in
pumped fluid or severe cavita-
tion. Inadequate water supply.
Fouled or dirty inlet or dis-
charge valves.
Worn inlet or discharge valves.
Leaky discharge hose.
Pressure adjustment set down.
Restricted inlet or air
entering the inlet plumbing.
Inlet restrictions and/or air
ilalve.
eaks. Stuck inlet or discharge
Leaking high pressure seals.
nadeouate water'suoolv.
aorn packings.
Norn packings.
3il seal leaking.
May be caused by humid air
:ondensing into water inside
he crankcase.
scored, damaged, or worn
hngers.
Urasive material in the water
)eing pumped.
nlet water temperature too
ligh.
Iver pressurizing pump.
ixcessive pressure due to
lartially plugged or damaged
tip
'ump running too long
vithout spraying or cleaning.
iunning pump dry.
breign particles in the inlet or
,ischarge valve, or worn inlet
nd/or discharge valves.
hit
not plugged in.
'lectric motor overheated
lectric service off.
:hemica1 injector clogged.
>djustable noale completely
Iosed.
3w chemical level.
SOLUTION
Tighten or replace.
Replace with noale of proper size.
and reassemble.
Disassemble, reseal, replace bad parts,
Clean. Use adequate size. Check more
frequently.
Install proper filter. Check flow available to
pump. Replace packings.
Clean inlet and discharge valve assemblies.
Replace worn valves, valve seats and/or
discharge hose.
Turn adjustment knob in to increase
pressure.
Proper size inlet plumbing; check for air
tight seal.
Clean out foreign material, replace worn
valves.
Replace seals.
Check flow available to oumo.
Replace packings
Replace packings.
Replace oil seals.
Change oil at
3
month or
500
hour intervals.
Xeplace plungers.
nstall proper inlet filter.
:heck inlet water temperature; be
iure not to exceed 1 6OoF.
Jo
not modify any factory-set
tdjustments.
:lean or replace tip.
Uever run pump more than
10
ninutes without spraying or cleaning.
10 not run pump without water.
leplace or clean valves.
:heck power cord.
.et motor cool and push reset bunon
In motor.
:heck fuse/circuit breaker panel.
)isassemble chemical valve and clean.
:heck and clean chemical hose and filter.
'urn control ring on noale clockwise
1
cause drop in pressure:
:heck level of chemical.
8
802-777
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