Troubleshooting - Graco BLUE DEVIL 260000 Instructions-Parts List Manual

Troubleshooting

Problem
Motor runs but pump will not prime.
Unit pumps but output flow is low.
8
Cause
Motor rotation wrong. (12 VDC and
24 VDC units only.)
Missing relief valve o-ring seal
(4c/7a).
Sheared drive key (1g/7c).
Dirt under relief poppet (4a) or seal
(4c/7a).
Strainer seal (3d/7e) leaking.
Suction height too high to prime.
Worn or damaged gears.
Fuel level low.
Cover seal (1f/7b/10c) damaged.
Inlet strainer (3b) clogged.
Air leak in suction tube.
Air lock in system.
Motor does not run at proper speed.
Clogged inlet strainer (3b).
Air leak in suction tube.
Suction tube too close to tank
bottom.
Tank empty.
Tank not vented.
Worn or damaged gears.
Damaged motor.
Clogged suction tube, hose, or
nozzle.
Troubleshooting
Solution
Check wiring instructions for possible
problems.
Remove gear cover (1b) inspect seal
(4c/7a), replace if missing or
damaged.
Remove cover (1b) and inspect key
(1g/7c/10b), replace if worn or
sheared.
Remove cover (1b) and inspect,
clean or replace if damaged.
Inspect and replace if damaged.
See Priming Pump, page 6.
Remove cover (1b) and inspect
gears. Replace if worn or damaged.
Refill tank.
Replace if worn or damaged.
Remove and clean or replace.
Inspect all joints in suction tube,
make sure all joints have sealant
applied.
This may occur if filter or meter or
automatic shut-off nozzle is used. If
this occurs, fill pump and meter with
fuel through top of pump.
Check electric connections. Check
supply voltage for proper voltage
level.
Clean or replace.
Check to make sure all joints in suc-
tion tube are sealed.
Suction tube must have a 2 in.
(51 mm) minimum clearance.
Refill tank.
Tank must be vented to atmosphere.
Remove cover (1b) and inspect
gears. Replace if worn or damaged.
Replace motor.
Inspect and clean.
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