Graco Check-Mate 2100 A Series Instructions-Parts List Manual page 15

WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 12.
PROBLEM
Pump fails to operate
Pump operates, but out-
put low on both strokes
Pump operates, but out-
put low on downstroke
Pump operates, but out-
put low on upstroke
Erratic or accelerated
pump speed
* To determine if the fluid hose or gun is obstructed, relieve the pressure. Disconnect the fluid hose and place a container at
the pump fluid outlet to catch any fluid. Turn on the air/hydraulic power just enough to start the pump. If the pump starts when
the air/hydraulic power is turned on, the obstruction is in the fluid hose or gun.
NOTE:If you experience air motor icing, contact your Graco distributor.
Troubleshooting
CAUSE
Restricted line or inadequate air/hydraulic
supply; closed or clogged valves
Obstructed fluid hose or gun/valve;
fluid hose ID is too small
Fluid dried on the displacement rod
Dirty, worn, or damaged motor parts
Restricted line or inadequate air/hydraulic
supply; closed or clogged valves
Obstructed fluid hose or gun/valve;
fluid hose ID is too small
Bleeder valve open
Air leaking into supply container
Fluid too heavy for pump priming
Worn packings in displacement pump
Fluid too heavy for pump priming
Held open or worn intake valve or seals
Held open or worn piston valve or seals
Exhausted fluid supply
Fluid too heavy for pump priming
Held open or worn piston valve or seals
Held open or worn priming piston
Worn packings in displacement pump
1. Relieve the pressure.
2. Check all possible causes and problems before
disassembling the pump.
SOLUTION
Clear; increase air/hydraulic supply.
Check that valves are open.
Open, clear*; use hose with larger ID.
Clean; always stop pump at bottom of stroke;
keep wet-cup 1/3 filled with compatible solvent.
Clean or repair; see separate motor manual.
Clear; increase air/hydraulic supply.
Check that valves are open.
Open, clear*; use hose with larger ID.
Close.
Check ram plate seal.
Use bleeder valve (see pages 12 and 14); use ram.
Replace packings.
Use bleeder valve (see pages 12 and 14); use ram.
Clear valve; replace seals.
Clear valve; replace seals.
Refill and prime.
Use bleeder valve (see pages 12 and 14); use ram.
Clear valve; replace seals.
Clear; service.
Replace packings.
308149 15