Graco Metric CHECK-MATE 200, Instructions And Parts List

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8
TROUBLESHOOTING CHART
PROBLEM CAUSE SOLUTION
Pump fails to operate Restricted line or inadequate air supply Clear; see TECHNICAL DATA on pages 20–23.
Obstructed fluid hose or gun/valve;
fluid hose ID is too small
Clear*; use hose with larger ID.
Fluid dried on the displacement rod Clean. See SERVICE.
Dirty or worn air motor parts Clean or repair. See air motor manual, supplied.
Pump operates, but out-
put low on both strokes
Restricted line or inadequate air supply Clear; see TECHNICAL DATA on pages 20–23.
Obstructed fluid hose or gun/valve;
fluid hose ID is too small
Clear*; use hose with larger ID.
Bleeder valve open Close.
Air leaking into supply container Check wiper plate seal.
Fluid too heavy for pump priming Use bleeder valve (see page 6); use wiper plate with
ram or pneumatic elevator cart.
Worn packings in displacement pump Replace packings.
Pump operates, but out-
put low on downstroke
Fluid too heavy for pump priming Use bleeder valve (see page 6); use wiper plate with
ram or pneumatic elevator cart.
Held open or worn intake valve or seals Clear valve; replace seals.
Pump operates, but out-
put low on upstroke
Held open or worn piston valve or seals Clear valve; replace seals.
Erratic or accelerated
pump speed
Exhausted fluid supply Refill and prime.
Fluid too heavy for pump priming Use bleeder valve (see page 6); use wiper plate with
ram or pneumatic elevator cart.
Held open or worn piston valve or seals Clear valve; replace seals.
Held open or worn priming piston Clear; service.
Worn packings in displacement pump Replace packings.
* To determine if the fluid hose or gun is obstructed, follow the
Pressure Relief Procedure Warning
below. Disconnect the fluid hose and place a
container at the pump fluid outlet to catch any fluid. Turn on the air just enough to start the pump (about 1.4–2.8 bar [20–40 psi]). If the pump starts
when the air is turned on, the obstruction is in the fluid hose or gun.
NOTE:
If you experience air motor icing, call Graco Technical Assistance
(1–800–543–0339).
Pressure Relief Procedure
To reduce the risk of serious bodily injury, including fluid injec-
tion, splashing in the eyes or on the skin, or injury from mov-
ing parts, always follow this procedure whenever you shut off
the pump, when checking or servicing any part of the spray/
dispensing system, when installing, cleaning or changing
spray tips/nozzles, and whenever you stop spraying/dis-
pensing.
1. Engage the spray gun/dispensing valve safety latch.
2. Shut off the air to the pump.
3. Close the bleed–type master air valve (required in your
system).
4. Disengage the gun/valve safety latch.
5. Hold a metal part of the gun/valve firmly to the side of a
grounded metal pail, and trigger the gun/valve to relieve
pressure.
6. Engage the gun/valve safety latch.
7. Open the drain valve (required in your system) and/or the
pump bleeder valve, having a container ready to catch
the drainage.
8. Leave the drain valve open until you are ready to spray/
dispense again.
If you suspect that the spray tip/nozzle or hose is completely
clogged, or that pressure has not been fully relieved after fol-
lowing the steps above, VERY SLOWLY loosen the tip guard
retaining nut or hose end coupling and relieve pressure
gradually, then loosen completely. Now clear the tip or hose.
WARNING