Graco Monark 207550, Instructions-Parts List Manual

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307056Ką9
Troubleshooting
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 6.
1. Relieve the pressure.
2. Check all possible remedies in the Troubleshooting
Chart before disassembling the pump.
Problem Cause Solution
Pump fails to operate Restricted air line or inadequate air
supply
Insufficient air pressure; closed
or clogged air valves, etc.
Exhausted fluid supply
Damaged air motor
Clear air line or increase air supply.
Open or clean air valves, etc.
Refill fluid supply.
Service, see manual 307–043.
Pump operates but output
low on both strokes Restricted air line or inadequate air
supply
Insufficient air pressure; closed
or clogged air valves, etc.
Exhausted fluid supply
Obstructed fluid line, valves, dispensing
valve, etc.
Worn throat packing (8)
Damaged cylinder o-rings (13)
Clear air line or increase air supply.
Open or clean air valves, etc.
Refill fluid supply.
Clear. (Relieve pressures and discon-
nect fluid line. Turn on air; if pump starts,
the line, etc. is clogged.)
Replace throat packing.
Replace o-rings.
Pump operates but output
low on down stroke Held open or worn fluid intake valve
Damaged cylinder o-rings (13)
Clear or service fluid intake valve.
Replace o-rings.
Pump operates but output
low on up stroke Held open or worn fluid piston or
seal (19) Clear or service fluid piston or seal.
Erratic or accelerated
operation Exhausted fluid supply
Held open or worn fluid intake valve
Held open or worn fluid piston or
seal (19)
Refill fluid supply.
Clear or service fluid intake valve.
Clear or service fluid piston or seal.