Pulse Control Valves; Normal Jetting; Using The Pulse Mode To Negotiate Bends And Traps; Negotiating Difficult Bends - RIDGID KJ-1350 Manuel De L'opérateur

KJ-1350 & KJ-1750 Jetter Machines
Figure 6 – Pulse Actuator OFF

Pulse Control Valves

The KJ-1350 and KJ-1750 Jetters have a pulse actuator
on the pump. Rotating the lever clockwise will engage the
pulse. The KJ-1350-2 and KJ-1750 Jetters have two lev-
els of pulsation with the addition of a pulse valve. There
are now three different pulses:
Actuator (#1)
Normal OFF
Bends & Traps OFF
Difficult Bends ON
For optimum jetter performance, you must understand
the proper use of the pulse actuator and pulse valve.

Normal Jetting

Turn pulse actuator (#1) to the OFF position. Turn the
pulse valve (#2) on the KJ-1350-2 and KJ-1750 to the
OFF position. This results in maximum pressure but
no pulse action.
1. 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 bends.
2. If the hose won't advance, pull back on the hose
slightly and rotate the hose a quarter to a half turn.
Then advance the hose forward.
3. If the jetter hose is not advancing, it may be neces-
sary to induce some pulse action.
Valve (#2)
All OFF KJ-1350-2
ON KJ-1750
ON
Ridge Tool Company
#1 Actuator OFF
Figure 7 – Negotiating Bends and Traps
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,
turn the pulse actuator (#1) to the OFF position and
valve (#2) for KJ-1350-2 and KJ-1750 to the ON position
(Figure 7). In the pulse mode, the pump induces large pul-
sation and jetter hose vibration. Rotating the hose while
operating in the pulse mode will normally overcome stub-
born bends and traps.
Negotiating Difficult Bends w/ KJ-1350-2 and
KJ-1750
By turning the pulse actuator (#1) and the pulse valve
(#2) to the ON position on the KJ-1350-2 and the KJ-
1750 will achieve a higher amplitude of pulse. This will
allow the jetter hose and nozzle to vibrate and negotiate
difficult bends. (Figure 8)
Figure 8 – Negotiating Difficult Bends
NOTE! In the pulse mode, the jetter's pressure gauge
will read approximately 400 - 600 PSI.
#2 Valve ON
#1 Actuator ON
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