TMG TMG-HW28, Product Manual

Page: 27 / 41

Unloader (pressure)
produces low
flowand normal
pressure
Unloader adjusted too low If the unloader is diverting flow to bypass it may be adjusted
too low, readjust as necessary.
Spray nozzle tolarge Ensure the proper nozzle is installed on system.
Internal nozzle erosion The number of hours of usage can give you a clue to the
extent of the ware. If in doubt, change
Insufficient pump pressure Check pump seals and packings and tighten drive belts.
Unloader (flow) produces
low flow & normal
pressure
Unloader adjusted too low If unloader is diverting flow to bypass, readjust using the
pressure gauge.
Nozzle too large Ensure the proper sized nozzle is being used.
Unloader (pressure) leaks
from main spring or
adjusting bolt
Shaft O-ring in valve body warn Check O-rings for ware or damage and replace as necessary.
Unloader (flow) pressure
increases when trigger
released
Unloader piston stuck or frozen Check unloader shaft for proper action. Unstick piston and
shaft or replace unloader.
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.
Unloader (flow) leaks water
around adjusting bolt
Sleeve O-ringworn Check O-rings for ware or damage and replace as necessary.
WWW.TMGINDUSTRIAL.COM P27/41 Toll Free:1-877-761-2819