16
177-998D
T100 Series High Pressure - Troubleshooting
Float Switch Back Cover Assembly (Cont'd)
b. Install eight screws (45) alternately through assembled
frame into back cover (12) until snug.
c. Assemble baffle (13) and back cover.
d. Attach baffle and back cover to crankcase (2) with twelve
screws (16)
e. Assemble float switch (48) to float switch adapter (47)
finger tight plus one half turn.
f. Assemble float switch adapter with float switch and O-ring (46)
into back cover until seated.
g. Reconnect float switch.
T100 Low Troubleshooting
Cavitation
• Inadequate fluid supply because:
— Inlet line collapsed or clogged
— Clogged line strainer
— Inlet line too small or too long
— Air leak in inlet line
— Worn or damaged inlet hose
— Too many valves and elbows in inlet line
• Fluid too hot for inlet suction piping system
• Air entrained in fluid piping system
• Aeration and turbulence in supply tank
• Inlet vacuum too high (refer to “Inlet Calculations” paragraph)
Symptoms of Cavitation
• Excessive pump valve noise
• Premature failure of spring or retainer
• Volume or pressure drop
• Rough-running pump
• Premature failure
Drop in Volume or Pressure
A drop in volume or pressure can be caused by one or more
of the following:
• Air leak in suction piping
• Clogged suction line or suction strainer
• Suction line inlet above fluid level in tank
• Inadequate fluid supply
• Pump not operating at proper RPM
• Relief valve bypassing fluid
• Worn pump valve parts
• Foreign material in inlet or outlet valves
• Loss of oil prime in cells because of low oil level
• Ruptured diaphragm
• Cavitation
• Warped manifold from overpressurized system
• O-rings forced out of their grooves from overpressurization
• Air leak in suction line strainer or gasket
• Cracked suction hose
• Empty supply tank
• Excessive aeration and turbulence in supply tank
• Worn and slipping drive belt(s)
• Worn spray nozzle(s)
• Cracked cylinder
Pump Runs Rough
• Worn pump valves
• Air lock in outlet system
• Oil level low
• Wrong viscosity of oil for cold operating temperatures
(change to lighter viscosity)
• Cavitation
• Air in suction line
• Restriction in inlet/suction line
• Hydraulic cells not primed after changing diaphragm
• Foreign material in inlet or outlet valve
• Damaged diaphragm
• Fatigued or broken valve spring
Premature Failure of Diaphragm
• Frozen pump
• Puncture by a foreign object
• Elastomer incompatible with fluid being pumped
• Pump running too fast
• Excess pressure
• Cavitation
• Aeration or turbulence in supply tank
Valve Wear
• Normal wear from high-speed operation
• Cavitation
• Abrasives in the fluid
• Valve incompatible with corrosives in the fluid
• Pump running too fast
Loss of Oil
• External seepage
• Rupture of diaphragm
• Frozen pump
• Worn shaft seal
• Oil drain plug or fill cap loose
• Valve plate and manifold bolts loose
Premature Failure of Valve
Spring or Retainer
• Cavitation
• Foreign object in the pump
• Pump running too fast
• Spring/retainer material incompatible with fluid being pumped
• Excessive inlet pressure
