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Troubleshooting
40 3A2012J
Troubleshooting
Problems
Try the recommended solutions in the order given for
each problem, to avoid unnecessary repairs.
Catalyst Pump
See Catalyst Slave Pumps parts illustration on page 66 for parts identification.
Resin Pump
See Resin Pumplines on page 61 for parts identification.
Follow Pressure Relief Procedure and Shutdown
on page 24 before checking or servicing the equip-
ment.
Problem Cause Solution
Pressure loss on up stroke. Worn transfer housing seal. Replace transfer housing seal.
Worn transfer housing seat. Replace transfer housing.
Pressure loss on up stroke and down
stroke.
Worn weep seals. Replace weep cartridge.
Blow off valve spring is wearing out. Replace blow off valve.
Loose fittings on spray gun and/or hoses. Tighten fittings on spray gun and hoses.
Scratched piston rod. Replace piston rod.
Pressure not building on up stroke. Damaged transfer housing seat. Replace transfer housing.
Pressure not building on down stroke. Scratched inlet valve. Replace inlet valve.
Leakage from cartridge housing. Loose cartridge housing. Tighten cartridge housing.
Loose bearing. Tighten bearing.
Pressure being relieved through relief
valve or check valve at a low pressure.
Relief valve or check valve has a weak
spring.
Replace relief valve or check valve.
Pump will not prime. Fluid inlet ball valve is closed. Open fluid inlet ball valve.
Excessive weepage Missing snap-on seal retainer Remove cartridge and install
Worn or damaged snap-on seal retainer Remove and replace
Problem Cause Solution
Does not operate. Valve closed or clogged. Clear air line; increase air supply. Check that
valves are open.
Fluid hose or gun obstructed. Clean hose or gun.*
Dried fluid on displacement rod. Clean rod; always stop pump at bottom of stroke;
keep wet-cup filled with Throat Seal Liquid (TSL).
Air motor parts dirty, worn, or damaged. Clean or repair air motor. See air motor manual.
Runaway error on DataTrak tripped (if DataTrak
installed)
See DataTrak Operation-Runaway Monitor,
page 35.
Stall on bottom of
stroke.
Runaway solenoid actuated. (if DataTrak installed) Enable runaway protection, if disabled, then see
Runaway, page 35, to reset the runaway solenoid.