TMG -HW41T Product Manual page 24

PROBLEM
No Flow
Low pressure, adequate
flow
Low pressure, low flow
Low pressure, low flow
- Bogs
WW W . T M G I ND U S T R I A L . C O M
FLUID SYSTEM DIAGNOSTICS - Flow and Pressure
POSSIBLE CAUSE
No power
Trigger gun valve
No water source
Clogged spray nozzle
Clogged inlet filter
Float Valve stuck (optional)
Faulty unloader valve
Incorrect or no spray nozzle
Worn spray nozzle
Debris in valves
Lance on low pressure
Unloader is not adjusted correctly Adjust unloader to proper level.
Pressure gauge inaccurate
Pump packings bad
Volume Improperly adjusted
Discharge leaks
Downstream chemical injector
(Dema)
Loose drive belts
Pump not running at rated speed Check engine throttle and see that the motor is rated for
Stripped pump drive coupling
Defective easy start valve
(optional)
Malfunctioning motor or gear
Unloader stuck in bypass
Outlet restriction
Clogged nozzle
Nozzle too small
Hose restriction
Debris in the system
Make sure pump is operating. Check drive belts and
couplings, make necessary adjustments.
Check trigger gun, repair or replace.
Ensure water supply is not restricted and hoses are in
good repair and not kinked.
Check spray nozzle, repair or replace.
Check inlet filter, repair or replace.
Float valves can become stuck in the "UP" position.
Manually dislodge and inspect for problems.
Remove and check for proper action, repair or replace.
Nozzle should be properly sized for the system. Low
pressure indicates that the nozzle in use is
too large.
Replace nozzle when it shows signs of internal erosion.
Clean valves and check o-rings for pits and cracks.
Adjust pressure so the water flows through properly.
Use a new pressure gauge on a quick connect at outlet to
check system pressure and replace if
gauge is faulty.
If low pressure persists, pump packings may need
replaced.
If unit has volume adjustment, it may need readjustment
Look for leaks on the discharge side of system.
Remove the injector and retest system. If the flow is
restored, replace the injector.
If belts do not have proper deflection, replace them.
the same speed as the pump.
Inspect coupling and repair or replace.
Check the start or throttle-back valve for proper operation.
Ensure that the motor or engine is working properly
Piston assembly may be stuck or fouled
Build up can restrict flow. If water is not flowing freely,
flush with garden hose to isolate the clog
or restriction.
Distorted spray pattern can indicate a clogged nozzle.
Ensure nozzle is proper size for the system.
Correct any kinks or restrictions. Replace crushed hoses.
Debris can lodge in the discharge side of the system
(valves, fittings, injectors, filters) Flushing
with water may correct it.
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SOLUTION
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