Graco 246780 Manual De Usuario

Relieve pressure before you check or service any 
system equipment.

Pump fails to operate

Inadequate air supply pressure or 
restricted air lines

Increase air supply and/or clear 
restriction.

Closed or clogged pump valves

Open and/or clean.

Clogged fluid line, hose, valve, or 
other accessory

Relieve pressure.
Clear obstruction.

Damaged air motor

Assess damage, and service air 
motor.

Exhausted fluid supply

Refill and reprime or flush.

Continuous air exhaust

Worn or damaged air motor
gasket or seal

Assess wear or damage, and service 
air motor.

Erratic pump operation

Exhausted fluid supply

Refill and reprime or flush.

Worn pump seals

Replace.

Damaged shovel tube

Replace.

Damaged check seat

Replace pump piston or shovel rod 
(or other damaged part).

Errataic or accelerated pump speed

Exhausted fluid supply

Refill and reprime of flush.

Fluid too heavy for pump priming

Use inductor or follow plate.

Held open or worn piston valve or 
seal

Clear valve; replace seal.

Held open or worn intake valve or 
seal.

Clear valve; replace seal.

Pump operates, but output low on up 
stroke

Worn piston seal

Replace.

Damaged upper check seat

Replace pump piston.

Pump operates, but output low on 
down stroke

Worn fluid intake seal

Replace.

Damaged lower check seat

Replace shovel rod.

Pump operates, but output low on 
both strokes

Inadequate air supply pressure or 
restricted air lines

Increase air supply and/or clear 
restriction.

Closed or clogged pump valves

Open and/or clean.

Exhausted fluid supply

Refill fluid supply, and reprime pump.

Clogged fluid line, hose, valve, or 
other accessory

Relieve pressure.
Clear obstruction.

Worn seals

Replace.

Grease leaking from muffler plates

Worn throat seal

Replace.