TMG -HW41T Product Manual page 27

Unloader (pressure)
produces low
flowand normal
pressure
Unloader (flow) produces
low flow & normal
pressure
Unloader (pressure) leaks
from main spring or
adjusting bolt
Unloader (flow) pressure
increases when trigger
released
Unloader (flow) leaks water
around adjusting bolt
WW W . T M G I ND U S T R I A L . C O M
Unloader adjusted too low
Spray nozzle tolarge
Internal nozzle erosion
Insufficient pump pressure
Unloader adjusted too low
Nozzle too large
Shaft O-ring in valve body warn
Unloader piston stuck or frozen
Bypass port clogged or restricted Ensure that unloader bypass port is not clogged
Excessive tension on main spring If tension is incorrect, adjust or replace as necessary.
Sleeve O-ringworn
If the unloader is diverting flow to bypass it may be adjusted
too low, readjust as necessary.
Ensure the proper nozzle is installed on system.
The number of hours of usage can give you a clue to the
extent of the ware. If in doubt, change
Check pump seals and packings and tighten drive belts.
If unloader is diverting flow to bypass, readjust using the
pressure gauge.
Ensure the proper sized nozzle is being used.
Check O-rings for ware or damage and replace as necessary.
Check unloader shaft for proper action. Unstick piston and
shaft or replace unloader.
Check O-rings for ware or damage and replace as necessary.
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