Normal Jetting; Using The Pulse Mode To Negotiate Bends And Traps - RIDGID KJ-3000 Manuel De L'opérateur

KJ-3000 Water Jetter Machine
• Turn the key to the START position to start engine.
Release key after the engine is started.
NOTE! Electric start engines can also be started manu-
ally: make sure the ignition key is turned to the ON
position. Pull the starter grip lightly until resis-
tance is felt, then pull briskly.
6. As the engine warms up, gradually move the choke
lever to the OPEN position and adjust the throttle
lever for the desired engine speed.
NOTE! For further details on engine operation, see the
enclosed Engine Owner's Manual.
7. Insert the jetter hose several feet into the drain and ad-
just the unloading valve to the desired pressure, up to
3000 PSI maximum (rotate clockwise to increase
pressure) (Figure 6).
WARNING Do not operate above 3000 PSI or 140°F
water temperature. Do not operate with nozzle outside of
drain.
Figure 6 – Adjusting the Unloading Valve
8. If the jetter will not generate 3000 PSI:
• Make sure the engine throttle is adjusted properly.
• Make sure the water faucet is completely OPEN
and the inlet supply valve is OPEN.
• Check the filter screen at the inlet port to the jetter.
Make certain it is clear of debris.
• Check inlet line strainer. Make certain it is clear of de-
bris by removing bottom bowl and cleaning screen.
• Make sure the pulse actuator is in the OFF posi-
tion.
• Cycle the pulse actuator ON and OFF several times
while the jetter is running to clear any trapped air in
the system.
• Rotate unloader valve clockwise to make sure it in-
creases pressure.
8

Normal Jetting

1. For normal jetting, turn the pulse actuator to the OFF
position and guide the hose into the line by hand. The
thrust created by the nozzle will propel the hose down
the line.
2. When the jetter nozzle encounters a bend, its ad-
vance will usually slow or stop. The jetter hose has a
slight bend or set to it. The reverse thrust of the noz-
zle will advance the jetter hose, but it is also necessary
to manually feed and rotate the jetter hose to work the
set around the bend.
3. If the hose will not advance, pull back on the hose
slightly and rotate the hose a quarter to a half turn so
the set will align itself with the bend. Then advance the
hose forward.
Using The Pulse Mode To Negotiate
Bends And Traps
In some cases, simply rotating the hose will not be enough
to negotiate a bend or trap. In these instances, it will be
necessary to induce some pulse action. In the pulse
mode, the pump induces large pulsation and jetter hose vi-
bration which will ease hose advancement.
1. Rotate the pulse actuator lever clockwise to induce the
pulse (Figure 7).
2. While in the pulse mode, again rotate the hose to align
the set with the bend. This technique will normally
overcome stubborn bends and traps.
NOTE! In the pulse mode, the jetter's pressure gauge
will read approximately 2000 – 2200 PSI.
Figure 7 – Pulse Actuator ON
3. Once through the bend or trap, return the pulse con-
trol actuator lever to the OFF position. Continue the
jetter head's advance.
NOTE! Leaving the jetter in the pulse mode for an ex-
tended period of time can cause premature wear
on hoses and system.
Ridge Tool Company