Craftsman 919.762000 - Manual (Page 9)

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TROUBLE SHOOTING
SYMPTOM
Engine won’t start
CAUSE
Engine throttle is in "OFF" Position
Primer bulb hasn't been pushed
Pressure build up after initial use
SOLUTION
Slide throttle to “Run" position.
Push primer bulb 3 times, waiting 2 seconds between
pushes.
Depress triqaer qun
Won’t Draw
Chemical
Nozzle not in chemical draw position
Chemical screen is obstructed
Chemical screen not working
Chemical injector orifice obstructed or stuck
Push nozzle forward at end of wand.
Check chemical screen, clear) of obstructed.
Make sure chemical screen is submerged in chemical/
water
Check and clean
Pump running
normally but
pressure does
not achieve
rated values.
Water supply restricted
Nozzle is in low PSI position
Nozzle incon’ect or worn
Pump sucking air
Nozzle blocked
Check water supply and filter screen for blockage. Check
hoses for blockage, kinks, leaks, etc..
Pull nozzle at end of wand back to the high pressure
position.
Check and replace.
Check that hoses and fitting are air tight.
Clean nozzle.
Fluctuating
Pressure Pump sucking air
Garden hose inlet strainer clogged
Worn Seals or Packing.
Inadequate water supply.
Fouled or dirty inlet or discharge valves.
Leaky discharge hose.
Check that hoses and fittings are airtight. Purge air from garden
hose.
Clean. Checkfilterfrequently.
Check and replace
Check flow available to pump. Check for excessive heat 145^ F
Clean inlet and discharge valve assemblies. Replace if damaged.
Pressure drops
after period of
normal use Nozzle clogged, partially obstructed
Nozzle worn
Valves worn, dirty or stuck
Worn piston packing
Clean or replace.
Check and replace.
Check, clean or replace.
Check and replace.
Pump noisy Water too hot
Pump sucking air
Valves dirty or worn
Worn bearings
Reduce temperature below 63° C or 145° F.
Check that hoses and fittings are air tight.
Check, clean or replace.
Check and replace if necessary.
Presence of
water in oil (Oil
milky) Water
dripping
from Dumo
High humidity
Piston packing and oii seal worn
Change Oil.
Check and replace oil seals.
Water dripping
from
pump
Fittings Loose
0-rings of piston guide or retainer worn
Piston packing worn
Tighten
Check and replace.
Check and replace.
Oil Dripping Oil seal worn
Loose drain plug or worn drain plug o-ring.
Check and replace
Tighten drain plug or replace O-ring. Do not over torque.
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