Roberts 61-251, Руководство пользователя

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PROBLEM CAUSE SOLUTION
Sprayer starts but will not suck fluid. Fluid supply empty. Refill and prime pump.
Inlet screen clogged Clean.
Inlet valve stuck or damaged See page 18.
Outlet valve stuck See page 18.
Air trapped in hydraulic system See page 18,
Diaphragm
, step 9.
Hydraulic oil level low or empty See page 14.
Wrong grade of hydraulic oil or
wrong fluid in hydraulic system
Use only Graco approved hydraulic
oil, part no. 218–797.
Inlet valve not tight Tighten; see page 14.
Damaged diaphragm Replace; see page 18.
Sprayer sucks fluid but does not
build up pressure
Pressure control valve not turned up Adjust.
Outlet valve stuck, dirty or had worn
parts
See page 18.
Hydraulic oil low See page 14.
Inlet valve leaks See page 18.
Damaged diaphragm Replace; see page 18.
Damaged bypass valve Replace.
Damaged hydraulic system Return sprayer for repair.
Damaged fluid pump Replace.
Sprayer sucks fluid, builds pressure,
but pressure drops when gun is trig-
No spray tip on gun Shut off sprayer and install tip.
but pressure drops when gun is trig-
gered
Spray tip orifice too large for the fluid
or worn tip
Try a smaller tip or a new tip.
Inlet screen clogged Clean.
Optional gun filter clogged Clean or replace.
Optional gun filter screen too fine for
type of fluid
Install larger mesh filter or strain and
thin the fluid.
Fluid too thick Thin and/or strain.
Worn outlet valve Replace; see page 18.
Leaking bypass valve Replace.
Worn or damaged inlet valve See page 18.
Worn or damaged pressure control
valve
See page 18.
Pressure fluctuations Outlet valve stuck, dirty or worn See page 18.
Leaking or dirty bypass valve Replace.
Dirty, leaking, worn or damaged
inlet valve
Replace; see page 18.
Dirty pressure control knob Clean or replace; see page 18.
Damaged diaphragm, or fluid pump,
or hydraulic system
Return for repair.
Fluid in hydraulic system Ruptured diaphragm Return for repair.
Hydraulic oil in fluid Ruptured diaphragm Return for repair.