Caviblaster 0520-G Manual

Operation &
Maintenance
Manual
Model 0520-G

Model 0520-G –Manual Start
Operating Instructions
WARNING: To ensure operator safety and efficient operation of the
CaviBlaster®, it is essential to follow these instructions.
Preparing the CaviBlaster system for operation:
1. Inspect the CaviBlaster® power unit, hose and gun for any signs of damage.
2. Inspect garden hose inlet (Figure-1) to ensure that it is not dirty or clogged. Clean as necessary.
Water Inlet - Figure #1
3. Check lubricating oil(s) and fuel levels: Assure proper oil level in engine crankcase, pressure pump and
fuel level in fuel tank (gasoline). Figures 2, 3, 4.
Engine Oil Level - Figure #2 Pump Oil Level - Figure #3 Fuel Level - Figure #4

4. Fill lubricating oil(s) to proper level(s) in the pressure pump (Red cap on pump) (Figure-5) and engine
(Yellow cap on head cover) (Figure-6) per manufacturers’ operating manuals.
Pump Oil Red Cap - Figure #5 Yellow Cap on head cover - Figure #6
NOTE: Pressure Pump Oil (SAE 30W-Non-Detergent) Figure-7; Engine Oil (SAE 10W 30) Figure-8
Pressure Pump Oil - Figure #7 Engine Oil - Figure #8
5. To provide water to the CaviBlaster® 0520-G power unit, connect garden hose to the water inlet
connection on the power unit (Figure-9).
Connect Garden Hose to Water Inlet - Figure #9

Only fresh water can be used with this system.
When feeding the CaviBlaster® with an alternate water source, the source must supply water at a volume
of greater than 5 gallons per minute at a maximum pressure of 70-psi. Connect the water source to the
inlet of the pressure pump (Figure-9). Ensure that the garden hose is connected to the pressure pump and
the water is on prior to starting the pressure pump.
To make sure the source is providing 5 gallons per minute try filling up a 5 gallon bucket in less than a
minute. Figure 10.
Fill up a 5 gallon bucket in less than one minute - Figure #10
Starting the CaviBlaster® power unit:
1. When using a pressurized water source, open the valve to supply water to the system.
2. Ensure that the system is primed with water and that there are no leaks in the system. The pressure
pump is a positive displacement pump and water must be supplied under pressure. Failure to pump feed
water to the pressure pump will result in damage to the pump.
3. Connect the 3/8″ high-pressure hose to the quick-connect plug under the pressure-regulating unloader
(Figure-11). The high-pressure hose has a brass quick-connect socket on the end. The CaviBlaster® Model
0520-G can deliver the required pressure utilizing up to 300 feet of 3/8″ diameter rubber hose.
Connect HP Hose to the quick connect under pressure regulator - Figure #11

4. Move throttle to the On position (figure 12) and fully engage choke (figure 13) and then pull the handle
on the recoil assembly to start engine (figure 14).
Throttle at the On position - Figure #12 Fully engage Choke - Figure #13 Recoil Assembly - Figure #14
5. Connect the gun to the high-pressure hose (Figure-15) and submerge the gun in water.
Connecting the gun to the High Presure Hose - Figure #15
6. It is recommended that the gun trigger be in the open or “ON” position when starting the engine. This
will prevent a pressure shock wave from damaging the pump in the instant that the engine is started.

7. Divers and nearby personnel must use appropriate hearing protection prior to starting the engine.
8. Be sure the engine run switch is on (figure 12). Set the choke knob to close the choke if the engine is
cold or has not been running (figure 13). If the engine has been running and is warm, leave the choke
open. Adjust the throttle lever (Figure 12) one-third of the way from “MIN” toward “MAX” for correct
engine start RPM. Pull the recoil start cord, (figure 14) (several times as necessary) until the engine starts.
If the engine does not start, release the choke and try again.
9. Once the unit is running and warm, move the throttle to Max. (figure 16)
The system is now ready to operate. (figure 17)
Throttle to Max position - Figure #16 Overall system set up - Figure #17
Recommendations for Effective Results.
Once the engine is throttled up to operating speed and the water trigger is pulled, the diver should find
the most effective distance between the gun nozzle and the surface being cleaned. When the diver is
ready to commence cleaning operations, ensure that the gun trigger is in the open or “ON” position, the
gun is submerged in the water and the water source is on, prior to throttling up the engine.
Ensure that the power unit operator and other people working in the vicinity of the power unit wear
appropriate hearing protection when the engine is running.

Gun efficient operating technique - Figure #18
1. The most efficient operating technique is to hold the nozzle 2-5 inches (5-12 cm) away from the surface
to be cleaned and at a 25° to 45° angle to the surface being cleaned. The diver needs to observe the shape
of the cavitating jet cone. At greater depths, the higher ambient pressure will cause the jet cone to be
shorter. The widest zone of the cone is the most efficient part of the cavitating jet. Placing the nozzle
closer than 2 inches (5 cm) from the surface being cleaned will not allow for efficient cavitation
performance and will degrade the cleaning capability of the CaviBlaster® system.
2. Follow all safety regulations that may be applicable to the work being performed.
3. If the diver operating the CaviBlaster® unit must be replaced or the cleaning operation must be
terminated, disengage the pressure pump by pulling down the throttle lever in to the idle position and
release the water pressure remaining in the hose(s) by moving the gun trigger to the open or “ON”
position while under water. Revert to step 1 of the operating instructions when the diver or replacement
is ready to continue cleaning.
WARNING: Although the CaviBlaster® system is safe to use when submerged in water,
the system generates a high pressure (up to 2,000-psi) water stream, which can cause
injury when the gun is out of the water. ALWAYS keep the gun submerged when the
pressure pump is engaged.

Operating the CaviBlaster® system:
1. When the diver is ready to commence cleaning operations, ensure that the gun is submerged in
water. Then move the throttle lever up to adjust the engine RPM to “MAX”.
2. Ensure that the power unit operator and other persons working in the vicinity of the power unit
wear appropriate hearing protection when the engine is running. If the diver is not wearing a
helmet, hearing protection is recommended. CaviDyne™recommends “Doc’s Proplugs” vented
earplugs or equivalent for diver hearing protection.
3. Activate the cleaning cavitation stream by squeezing the trigger to the open or “ON” position.
4. The most efficient operating technique is to hold the gun 2-3 inches away from the surface to be
cleaned and at a 25° to 45° angle to the surface being cleaned. Placing the gun closer than 2-3
inches from the surface being cleaned will not allow for efficient cavitation performance and will
degrade the cleaning capability of the system. (Figure-18).
5. Wear neoprene or rubber gloves to protect the hands and follow all safety regulations that may
be applicable to the work being performed.
6. If the diver operating the unit must be replaced or the cleaning operation must be interrupted or
terminated, shut down the engine by moving the throttle lever down to adjust engine RPM to
“MIN” (Figure 16) and turning the engine to the “OFF” position (figure 12). Turn off the water feed
and then release the water pressure in the hose(s) by squeezing the gun trigger to the open or
“ON” position while under water. Revert back to step 1 of the operating instructions when the
replacement diver is ready to continue cleaning.
7. Ensure that the gun is submerged any time the engine and pressure pump are operating.
Adjusting the CaviBlaster® system for maximum performance:
Recommended Calibration Method
1. Using the optional calibration pressure gauge set, situated between the pressure hose and the
CaviBlaster® gun, the output water pressure should be adjusted to 2,000 PSI, with the gun
submerged and the gun trigger in the open or “ON” position. The pressure is adjusted by turning
the black knob on the end of the pressure-regulating unloader (Figure 19). This adjustment
increases or decreases the flow of water through the bypass hose when the CaviBlaster® gun
trigger is in the open or “on” position. The flow of water through the bypass hose, in turn,
determines the flow of water through the pressure hose and the gun. Less flow through the
bypass hose means more flow through the gun which translates to higher velocity and pressure.
There should always be a trickle of water through the bypass when the gun trigger is in the open
or “ON” position. This ensures that the bypass will open without a pressure shock wave damaging
the pump when the gun trigger is released to the closed position.

Pressure Regulator Knob - Figure #19
Shutting down the CaviBlaster® power unit:
1. Adjust engine RPM to “MIN” (Figure 16).
2. Shut off the engine by turning the run switch to the “OFF” position (Figure 12).
3. Squeeze the gun trigger to the open or “ON” position to release the water pressure remaining in
the hose(s) while the gun is submerged.
4. It is now safe to remove the gun from the water.
5. Flush the system and rinse the power unit with fresh water at the end of the day.
Maintenance of the CaviBlaster® unit:
1. Check the oil level and consistency in the engine and pressure pump every day.
2. Flush the system and rinse the power unit with fresh water after each days use, for at least 5
minutes, to make sure all inside residuals are removed.
3. Change the engine oil after the first month or 20 hours and every six months or 100 hours
thereafter. Replace the oil filter every 200 hours. Use SAE 10W-30 oil for general all- temperature
use.
4. Clean the air cleaner cover, filter elements and base every three months or 50 hours. Replace the
paper filter element every twelve months or 300 hours or if damaged or excessively dirty.
5. Change the oil in the pressure pump after the first 50 hours and every 500 hours thereafter. Use
single-weight lubricating oil (SAE 30 weight non-detergent)
6. Change the spring for the gun trigger every 12 months or less as required.

Summarizing the operating instructions:
1. Inspect the system for damage. Check oil/fuel levels.
2. Attach the garden hose to the unit.
3. Start pressurized water supply and ensure that the system is primed.
4. Attach the gun to the pressure hose.
5. Make sure that the diver is ready to work and that the gun is submerged in the water.
6. Apply hearing protection, start the engine and adjust the throttle to “MAX.”
7. Activate the cleaning cavitation stream by squeezing the gun trigger to open or “on.”
8. Proceed with cleaning.
9. When cleaning is complete, shut off the pressurized water source.
10. Release pressure from the hose(s) by squeezing the gun trigger to the open or “ON” position while
under water.
11. Remove the gun from the water.
12. Flush the system and rinse the outside of the power unit with fresh water.
WARNING: While the CaviBlaster® system is very safe, operators should exercise care when using this
equipment. With the diver lance underwater, the cavitation “flame” can be safely passed
over the operators’ skin at normal operating distances of 2” – 3” from the tip of the nozzle.
However, at very close distances (typically less than 1”) both nozzles can cause harm to
the operator, particularly in the initial instant that the system is activated. For that reason,
operators should exercise caution when operating the gun with the nozzles in close
proximity to the body. The operators should also ensure that the reverse-thrust nozzle
guard is secured in the correct position prior to operating the gun. The operators of the
CaviBlaster® system should always wear neoprene or heavy rubber gloves to provide
protection to the hands and, in particular, to the nails. The gloves will absorb most of the
energy produced by bursting cavitation bubbles and prevent the cavitation bubbles from
contacting the operators’ hands. The gloves will also protect operators’ hands from the
initial shockwave when the gun is activated. Serious harm and injury may result from the
misuse of CaviBlaster® system equipment or improperly selected fittings, hoses or
attachments. All components of the system should be checked against the
manufacturers’ instructions to ensure that they are compatible with the pressures being
used and of the correct thread type and pressure rating for the intended service. Refer to
these Operating Instructions and to the engine and pressure pump manufacturers’
operation manuals for instructions or call CaviDyne, LLC at [phone] with any
questions.
CAUTION: DO NOT USE IT TO CLEAN SENSITIVE SURFACES as LED-
Lights, Underwater Lights, Electronic Equipment, Etc.