| Pump goes up slowly and down fast |
0509707 inlet ball, 174-102 cage, 174-112 stop, 155-991 housing, siphon leaks, coating viscosity, and upper packings |
Clean and water-test the foot valve before replacing the ball or packing set. |
| Pump goes up fast and down slowly |
155-225 piston ball, 155-921 seat, lower packing set, spring, washer, rod threads, and contamination |
Test the piston ball and seat for sealing and inspect the lower packings before replacement. |
| Pump cycles rapidly without material |
material supply, siphon hose, 155-991 foot valve, 0509707 ball, coating thickness, inlet restriction, and bleed valve |
Restore material supply and clear the intake path before replacing Titan 155-991 Foot Valve Assembly. |
| Fluid leaks from the top packing |
155-053A upper packings, 155-982 rod, 155-010 washer, pump-block bore, lubricant condition, and chrome scoring |
Inspect the rod and bore before replacing Titan 155-053A Packing Set. |
| Pump moves slowly with gun closed |
loose connections, bleed valve, lower packings, piston ball, inlet ball, both seats, and O-ring seals |
Tighten and clean the system, then isolate ball or packing leakage before replacing components. |
| New packings fail or chatter |
155-982 rod, 155-932 cylinder, packing orientation, lubricant, swelling, spring stack, washer placement, and overtightened threaded joints |
Inspect hard-chrome surfaces and assembly sequence before installing another packing set. |