Graco Inc. 307-308 Pressure Washer User Manual


 
Lubrication
Change the engine oil after every 50 hours of operation.
every
EO
hours of operation. Remove excess grease
Grease the pump's front bearing and main bearing after
from the front bearing cavity. Replace the pump front
cover before starting the engine.
oil every 500 hours, but sooner if oil becomes dirty; The
Lubricate the gear reduction unit regularly: change the
engine manufacturer recommends using "For Service
operation, and S.A.E.
20
for winter operation.
SD
or
SE'
S.A.E. 30 oil for spring, summer, or fall
unit and loosen cover.
Drain oil with engine warm. Place pan under reduction
NOTE:
Once a year, remove engine cover com-
pletely and flush out inside of housing with
kerosene.
DO
NOT
use
gasoline for
cleaning.
Remove filler and level plugs. Pour oil through vent hole
of filler plug until
it
runs
out
through level hole. About
3/8
pint
(177
cc) is required. Replace oil level plug and
vented filler plug.
When changing engine crankcase oil, check reduction
unit and add oil if necessary
to
maintain proper level.
NOTE:
Vented filler plug should be removed
periodically and vent hole thoroughly
cleaned. Ventilation is necessary to eliminate
pressure build-up causing oil leaks, and
to
prevent condensation from forming in the
housing.
Follow the maintenance procedures for the engine
outlined in the accompanymg instructions.
The accumulator
(EO)
which acts as a buffer
to
smooth
pump strokes, is nitrogen. charged and must be re-
charged generally every
6
to
12
months to
540-660
psi
location for recharging.
(37-45 bar). Contact a local fire extinguisher servlce
Never remove stem valve from accumulator, or
check its pressure wlth a standard tire pressure
Never try
to
recharge accumulator with ordinary
car service station equipment.
TROUBLESHOOTING
Engine Will Not Start
Or Hard
To
Start
No
gasoline in fuel tank or
carburetor.
Water in gasoline or old fuel.
Choked improperly. Flooded
engine.
Dirty carburetor air filter.
Spark plug dirty or improper
gap.
Spray valve closed.
I
Engine Misses Or Lacks
Power
Partially plugged air cleaner.
Low oil level or dirty oil.
Spark plug dirty, wrong gap,
or wrong
type.
Incorrect ignition timing.
I
.
Excessive Machine Worn shaft couplers.
Vibration
Excessive Vibration
Of
Hose
Loss
of dampener charge.
bladder.
Damaged pulsation dampener
Accompanied By Rough
Decrease Delivery
Air leaking past piston cups;
Operation
Air entering suction piping;
Pump valve malfunction:
suction passages:
Plugged
or
restricted pump
Fill the tank with gasoline, open
fuel shut-off valve.
Check fuel line and carburetor.
Drain fuel tank and carburetor. Use new fuel and
dry spark plug.
engine several times
to
clear
out
the gas.
Push in choke, open throttle control and crank
Remove and clean.
Clean, adjust the gap or replace.
Open valve.
Remove and clean.
Check or change oil.
Clean, adjust the gap, or replace.
Time engine.
Replace couplers or coupler insert.
45
bar) of nitrogen.
Recharge with approximately
540-660
psi '(37-
Replace accumulator.
Examine the valve seats for wear and pitting.
Replace if necessary.
Arrange
a
barrel or tank
to
collect discharged
water from
pump.
Compare this to the rated
capacity
to
see if the discharge has actually
decreased.
4
307-308