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Operating Instructions
WARNING
Always wear eye protection to protect eyes from
dirt and other foreign objects. Use rubber gloves
and rubber boots.
Do not spray flammable liquids or toxic chemicals.
Water spray should not be pointed at any human.
Do not hold nozzle when pressurized.
Start-Up and Pressure Adjustment
NOTE! Both the KJ-1350 and KJ-1750 Jetters have
pulse actuators
(Figure 5)
. The KJ-1350-2 and
KJ-1750 have an additional pulse valve
(Figure
7)
. Both the pulse actuator and pulse dampener
valve must be in the OFF position prior to turning
the jetter switch ON. To obtain maximum pres-
sure, both pulse controls must be OFF.
1. Turn the unloader valve counter-clockwise to insure
the pressure is backed down. Turn jetter switch ON
and adjust the unloading valve so that the pressure
gauge shows a maximum of 1350 PSI (green zone)
on the KJ-1350 and KJ-1350-2. At this pressure, the
KJ-1350 Jetters draw approximately 14 amps when
supplied with 115 volt A/C current.
2. On the KJ-1750, adjust the unloading valve so that
the pressure gauge shows 1750 PSI (green zone). At
this pressure, the KJ-1750 draws approximately 17
amps when supplied with 115 volt A/C current.
(Figure 4)
NOTE! Operating pressure is increased by rotating the
unloading valve clock-wise +. If electrical circuit
is not dedicated to Jetter, it may be necessary to
reduce pressure (amp draw) to prevent trip-
ping the circuit breaker or blowing a fuse.
Figure 4 – Adjust the unloading valve
3. If the jetter will not generate pressure:
• 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.
• Cycle the pulse actuator on the KJ-1350 and KJ-1750
ON and OFF several times while the jetter is running
to clear any trapped air in the system.
• Cycle the pulse dampener valve on the KJ-1350-2
and KJ-1750 ON and OFF several times to clear
trapped air.
• Rotate unloader valve clockwise to make sure it in-
creases pressure.
Figure 5 – Pulse Actuator ON
Ridge Tool Company8
KJ-1350 & KJ-1750 Jetter Machines
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