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NOZZLE SELECTION GUIDE
HOSE SIZE
15° Rear Jets w/No Forward Jet
15° Rear Jets w/One Forward Jet
30° Rear Jets w/No Forward Jet
40° Rear Jets w/No Forward Jet
Spring Leader
Rotary Nozzle (Optional)
Chain Saw Nozzle (Optional)
JET ASSEMBLY
Upon arrival, inspect the shipping crate for damages. Uncrate and
examine all parts. Note any damage to machine or components
for claims against freight carrier.
Jet must be stored and operated in horizontal position. Never
store in upright position or oil may leak from pump. If low, fill with
SAE 30 weight non-detergent oil.
Gas jets are shipped with oil in the engine. Consult motor manu-
facturer's guide for oil requirements.
Jet machines are meant to be used at or near the working area
and under operator supervision. If machine must be located out of
sight of operator, special controls may be required for proper ma-
chine operation and operator safety
OPERATION
SET-UP
1. Locate the jet near the drain line on a level surface with drainage.
Tip: Ideally, the drain line should be cleared from the downstream
side, that is, from the street back toward the house. If you must
clear the line from the drain toward the street, you may need to
use a siphon pump to clear away excess water.
2. Check the oil level in the pump. If low, fill with SAE 30 weight non-
detergent oil.
3. Check the oil level in the engine. If low, fill with the oil weight rec-
ommended in the motor manufacturer's manual.
4. Check the inlet filter to make sure it's clean before each use. To
clean, unscrew filter cap, remove the screen and rinse thoroughly
with water. Then, replace screen.
5. Check that incoming water supply is clean and free of debris.
Turn the water source on for at least 15 seconds to remove any
possible debris in the water before connecting hose to water inlet.
1/8"
1/4"
3/8"
CAT #
CAT #
CAT #
JN-31
JN-41
JN-51
JN-32
JN-42
JN-52
JN-33
-
-
-
JN-44
JN-54
JNSL-4
JNSL-5
JNSL-6
-
JNRB-4
JNRB-6
-
-
JCSN-6
6.
Connect one end of a water supply hose (not included) to the
water supply and the other end to the water inlet of the jet ma-
chine. Water supply must be a minimum of 20 psi and not to
exceed 100 psi. Caution: Water temperature must not exceed
140 degrees or damage to the pump can occur. Use only heavy
duty 3/4" hose of no more than 50 ft. in length. If run without an
adequate water supply, the pump will cavitate. Cavitation causes
the pump to vibrate, causing damage to the pump. Note: Lack of
water supply can lead to seal damage, causing a loss of pres-
sure and will void the warranty to the pump.
7.
Maximum temperature from the water source should not exceed
140°F (60°C). Using water hotter than 140°F (60°C) can cause
damage to the pump and void the warranty. If jet is being used to
clear ice blockages, see instructions on Ice Blockages.
8.
Select the proper hose diameter for the line to be cleaned. When
using new hose, run water through it to clean it out before attach-
ing the nozzle.
OPERATION
NEVER POINT THE END OF THE JET HOSE AT A
PERSON WHILE OPERATING.
1. Select the correct jet hose size to match the line size you are
clearing. (See Hose Section Guide) Check all hoses for wear and
damage. Tighten all connections securely.
2. Select the correct nozzle and attach to the end of the hose. (See
Nozzle Selection Guide) Note: If you are using a new jet hose, run
water through it to flush out debris before connecting a nozzle.
3. Insert the jet hose 2 to 3 feet into the drain line before turning on
machine.
4. Turn on the water supply valve fully to allow for maximum flow.
5. Turn on the jet output valve and allow water to run through the
supply hose, jet, and jet hose to purge air from system before
turning on the machine.
6. Make sure that the output valve is turned on and the water is flow-
ing.
7. Start the engine using the Engine Start-up procedures listed be-
low.
GAS ENGINE START-UP
1.
Make sure that the ball valve is turned on and water is flowing.
2.
Move choke lever to the closed position. Note: Do not use choke
if engine is warm or ambient air temperature is high.
3.
Move throttle lever to the midpoint position.
4.
Turn the engine switch to the ON position.
5.
Pull the starter grip lightly until resistance is felt, then pull briskly.
6.
As the engine warms up, gradually move the choke lever to the
open position.
7.
Position the throttle to the desired engine speed.
OPERATION CONTINUED
9. Guide the jet hose into the drain line. Do not feed the hose con-
tinuously, but rather, move the hose forward and back to allow the
pressure to break up the stoppage and the water flow to flush it
away. If you are clearing the line from the upstream side, this may
take more time. Clearing the line from the downstream side allows
debris to flow away easily.
5
Jet-Set JM-2900™
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