JETStream FXG2 Tornado Gun Instruction sheet

Read these instructions thoroughly before installing, connecting, or using the
FXG2 TORNADO GUN. If any questions remain, call JETSTREAM at [phone]
or [phone]. Also read the yellow JETSTREAM SAFETY WARNING pamphlet
included with the shipment of your new FXG2 TORNADO GUN and reproduced
inside this publication. This product is sold with the understanding that the
purchaser agrees to thoroughly train all operators and maintenance personnel in
the correct and safe installation, operation and maintenance of the product and to
provide adequate supervision of personnel at all times. Retain these instructions
for future reference. If this product is resold or otherwise conveyed, purchaser
must pass on the instructions to the new user.
PRODUCT INSTRUCTIONS
FXG2 Tornado Gun™ (PNs 66210, 66211)
PI-120
The FXG2 Tornado GunTM is an air-actuated, dual-trigger waterblast con-
trol gun that is designed for maximum operator safety and field durability.
The Tornado Gun utilizes a mandrel/seal configuration that can be easily
overhauled in the field, as well as pushlock-type air-hose connections for
ease of hose removal and/or replacement. The Tornado Gun is rated for
40,000 psi maximum operating pressure and utilizes a 9/16” Type M inlet
connection.

2PI-120 March 2020
Table of Contents
Section 1: Safety ...........................................................................3
Section 2: Product Description ....................................................12
Section 3: Preparation for Use .....................................................14
Section 4: Setup ..........................................................................16
Section 5: Operation ....................................................................17
Section 6: Service........................................................................20
Section 7: Troubleshooting ...........................................................29
Appendix A ..................................................................................30
Appendix B ..................................................................................32
Tornado Surface Cleaning FX Nozzle Heads..................................32
Nozzle Holder Guard (PN 64450)..................................................32
Front Bushing Guard (PN 66343)..................................................32
Adjustable Shoulder Stocks (PN 66354 - Straight,
PN 66930 - Offset)................33
UHPX/UHPXi/UHPXD Nozzles ........................................................33
Swivel Bearing Puller Kit (PN 67444)............................................33
Spanner Wrench for Drive Sprocket (PN 63789) ...........................33
Air Drill Service Kit (PN 66848).....................................................33
Appendix C ..................................................................................34
Flow Charts .................................................................................34
Warranty......................................................................................36

3PI-120March 2020
Section 1: Safety
This information was prepared to aid in the identification of potentially
unsafe conditions when using high pressure waterblast equipment. It
should be noted that other potential hazards may exist which might have
not been mentioned in this brochure.
In all cases, JETSTREAM products are sold with the understanding that
the purchaser agrees to thoroughly train all operating and maintenance
personnel in the correct and safe installation, operation, and maintenance
of waterblast equipment, and to provide adequate supervision of person-
nel at all times.
Read the following in its entirety before connecting, operating or repair-
ing equipment. Purchasers and operators also should be familiar with
the current version of the “Industry Best Practices for the Use of High
Pressure Waterjetting Equipment” published by the Waterjet Technology
Association, as well as any applicable OSHA regulations, standards and
guidelines.
Should any questions arise concerning safe and proper procedure,
contact JETSTREAM prior to the installation or use at [phone] or
[phone].
Incorrect Use of High Pressure Waterblast
Equipment May Cause Serious Injury
Read these instructions in their entirety
before using any JETSTREAM products.

4PI-120 March 2020
GENERAL WATERBLAST
1. Use only clear, clean water in high pressure system.
2. Place barricades with warning signs or barricade tape around work
area.
3. Outfit all operators with Personal Protective Equipment (PPE). Hard hat
with plastic face shield, rainsuit, non-skid knee boots with metatarsal
protection, gloves, ear protection and body armor rated for operating
pressures are considered minimum safety equipment. Proper respiratory
protection is required where dangerous fumes or dust is present or
created by the waterblasting operation. Follow applicable OSHA
regulations, standards and guidelines regarding the use of respiratory
protection if harmful fumes or dust is present during, or created by the
waterblasting operation
4. Use products intended for high pressure waterblasting only.
5. No product should be altered without written consent of the
manufacturer.
6. Read and follow all manufacturer’s instructions prior to using any
waterblast product. Contact manufacturer.
7. Thoroughly review alternative methods before initiating any potentially
dangerous waterblasting operation. Fully automated, semi-automated,
and/or mechanized methods should all be considered first. Contact the
applicable waterblasting manufacturers for assistance and recommenda-
tions.
8. The operator handling the cleaning device (with nozzle) must always
have control of water pressure. A surface cleaning operator should
operate a trigger style control gun capable of instantaneously stopping
pressure to nozzle. A tube cleaning lance operator should operate a foot
gun capable of instantaneously stopping pressure to the lance.
9. Inspect the condition of all components prior to use. Use no items
which are in questionable condition.
10. Check the condition of thread connections prior to the make-up of any
high pressure connection. Use Teflon tape and anti-seize on male pipe
(NPT) thread for sealing purposes. Do not let tape overlap the male pipe
thread end. Tape fragments may enter system water stream and clog
nozzle’s orifices.
Do Not use a component with missing or damaged threads on the
high pressure connections.

5PI-120March 2020
Use wrench flats (when available) or a properly adjusted
smooth jaw plier wrench (JS PN 64119) for tightening components.
Avoid using pipe wrench as wrench marks will cause high pressure
components to crack and fail.
11. All high pressure hose connections require a hose restraint (whip
check), including connection at fluid end discharge.
12. Before attaching a nozzle to the control gun or tube cleaning lance,
operate the pump at low speed to purge dirt and debris from system.
Dirt and debris can clog nozzle orifice(s) and cause excessive
system pressure which could lead to a lance failure.
13. With nozzle installed, operate the pump at a low speed (low
pressure) for test. Should system repairs or adjustments be necessary,
stop pump and relieve all pressure before making required repairs or
adjustments. The pump operator should watch the nozzle operator at all
times in case any difficulty arises and it becomes necessary to depressur-
ize system. If the pump operator does not have a clear line of sight to the
nozzle operator, it may be necessary to have another employee available
to communicate between the nozzle and pump operators.
14. With the system operating properly, increase pump speed slowly
until operating pressure is reached and adjusted. Pressure adjust-
ments should always be made slowly. The nozzle operator shall be
warned before any pressure adjustment is made by the pump operator.
A sudden change in reaction force may cause the nozzle operator to lose
balance.
15. Use minimum pressure required for cleaning. Do not exceed the
operating pressure of the system’s lowest pressure-rated component.
All equipment pressure rating markers and warning tags should be left
intact.
16. Waterblast operators must be made aware that the cleaning nozzle’s
discharge jets(s) can inflict serious body wounds. Supervisors should
demonstrate the potential danger of discharge jet(s) by showing all new
operators the effect of a waterjet by cutting a scrap piece of wood such
as a 2” x 4”.
17. If equipment malfunctions or a system malfunction is suspected,
immediately stop cleaning activity and relieve the pressure in the system
before attempting any repairs. Always follow the manufacturer’s repair
instructions.

6PI-120 March 2020
18. Only trained persons should be authorized to perform any mainte-
nance or repair.
19. Following any repairs, the system should be operated at low pressure
for test. Bring equipment up to operating pressure slowly.
20. For shutdown in freezing conditions, even for brief periods, drain
water from all components. Prior to starting operations in freezing
conditions, the operation of all equipment components must be checked
carefully to make sure components are not frozen and can be operated.
21. Store components properly by protecting them from damage when
not in use. Be sure all safety warning tags and markers remain intact.
CONTROL GUNS AND DEVICES
1. Read General Safety section before connecting or using control guns
or control devices.
2. Thoroughly review alternative methods before initiating any potentially
dangerous shotgunning or hand lancing operation. Fully automated,
semi-automated, and/or mechanized methods should all be considered
first. Contact the applicable waterblasting manufacturers for assistance
and recommendations.
As described in the Industry Best Practices for the Use
of High Pressure Waterblasting Equipment published by the Waterjet
Technology Association, the standard shotgun barrel length shall be a
minimum length of 48” to minimize the risk of nozzle discharge
accidentally striking the operator’s feet, legs, or body. See Section
11.10.6. The WJTA has recognized that deviations or variances from
these best practices may be acceptable under certain circumstances.
See Section 2.7. If users believe deviation from this 48” standard is ac-
ceptable, they should follow procedures outlined in Section 2.7 to
minimize risk to the operator. Among other things, users should ensure
that other measures to perform the work have been considered and
exhausted, senior safety management and customers have considered
and approved the deviation, operators have been properly trained and
warned about any increased risk associated with the deviation, and
operators are wearing all appropriate PPE, including body armor rated for
the operating pressure.

7PI-120March 2020
3. Prior to use, thoroughly check control gun or control device for smooth
and proper operation. Control guns and control devices should also be
checked for proper operation before each operating shift. Do not use
any control gun or control device that has not been checked before your
operating shift.
4. A control gun operator using a hand-held gun should position and
brace his body for the gun’s rearward reaction force before depressing
gun trigger. Gun’s rearward reaction should be a maximum force of 40 to
50 lbs. (or 1/3 body weight of operator.) The control gun operator should
maintain firm, solid footing to counter gun’s rearward reaction.
5. The use of a Safety Shroud and a Safety Whip Hose with handheld
control guns is strongly recommended for additional operator protec-
tion against a burst occurring in the high pressure hose connected to the
gun. Use of Hand Grip and Shoulder Stock in hand-held control guns will
provide greater operator comfort and safety.
6. Fall protection should be provided when blasting on scaffolding or
sloping surface per OSHA guidelines. Do not operate a hand-held gun
while standing on slippery surfaces.
7. The control gun operator should always start blasting with a low
system pressure and slowly increase blasting pressure. Depress and
release control gun trigger/pedal several times at operating pressure to
check the control gun’s operation before starting cleaning operations.
8. A dump type control gun should always open fully and reduce the
system pressure to near zero immediately when its trigger/pedal is
released. If this type of control gun does not relieve system pressure
immediately or system pressure does not fall below 200 psi when trigger/
pedal is released, do not use the control gun.
9. The control gun operator should never pass a control gun to another
operator without first stopping the pump and water flow to the control
gun. Passing off a control gun without first stopping system waterflow is
dangerous because of possible accidental trigger actuation.
10. Do not use a control gun or control device that has malfunctioned or
you suspect malfunctioned without having it repaired and/or thoroughly
checked for proper operation by a qualified high pressure maintenance
mechanic or your supervisor.
11. Do not use a control gun that does not have a trigger guard.
12. Never tie, wedge or clamp a control gun’s trigger in the closed
position.

8PI-120 March 2020
13. All electric throttle control cords should be rated for wet conditions.
All cord connections and switches should be kept out of water.
14. Any hose used for transporting dump water back to pump should
have a large enough diameter and short enough length so that potentially
dangerous back pressure is kept low. Protect hose from traffic.
15. Hand-operated control guns should never be used as foot-operated
devices.
PRESSURE RELIEF DEVICES
1. Read General Safety section prior to installing Relief Valve and/or
Pressure Relief Devices.
2. A waterblast system should include both primary and secondary
pressure relief protection:
A. For primary protection a primary rupture disc assembly or spring-
loaded relief set at 1.2 times, maximum operating pressure is
recommended (i.e. relief valve is set at 12,000 psi if maximum
operating pressure is 10,000 psi)
B. For secondary protection a rupture disc assembly containing a
manufacturer’s approved disc having a burst rating of 1.4 times
maximum operating pressure is recommended.
Only use a rupture disc holder which will NOT permit the
use of coins or other objects in place of discs.
3. Relief devices should never be mounted so the discharge could strike
personnel.
4. Never install a shut-off valve between the pump and relief device.
5. “Set pressure” must be prominently displayed on all relief devices.
Never install or use a relief device unless its “set pressure” is known.
6. Do not attempt to correct a leaking relief valve by increasing spring
tension as this will increase its set pressure.
7. Do not use a pressure relief valve as a combination relief and throttling
device.
8. Keep relief valve dry during freezing conditions.
NOTE: Pressure relief devices are imperative for the protection of both
operator and equipment from dangerous over-pressurization.

9PI-120March 2020
HIGH PRESSURE HOSE
1. Read General Safety section prior to connecting high pressure hose.
2. Do not use a high pressure hose with a burst rating less that 2.5 time
the pressure at which it will operate. 40,000 psi operating pressure high
pressure must have a minimum 100,000 psi burst rating.
3. Do not use a high pressure hose that has an unknown burst rating or
manufacturer’s operating pressure rating.
4. Use of a Safety Shroud is strongly recommended for added safety
where hose connects to control gun.
5. Use of hose restraint (whip check) is required at all hose connections,
including connections at fluid end.
6. Always apply wrench to wrench flats when making threaded
connections. Do not apply wrench on the end fitting ferrule (collar).
7. Remove hose from service if:
A. Cover is damaged and reinforcing wires are exposed to rust and
corrosion;
B. Cover is loose, has blisters or bulges;
C. Hose has been crushed or kinked;
D. End fitting shows evidence of damage, slippage, or leakage.
E. Hose has been exposed to pressures greater than 50% of burst
rating; or
F. Hose is three or more years old, regardless of condition.
8. Disconnect, drain, coil and store hose properly after use.
9. Never attempt to repair or recouple high pressure hoses in field. High
pressure hose end fittings are the permanently crimped type and can only
be properly installed with hydraulic crimping equipment.
NOZZLES
1. Read General Safety section.
2. Nozzle flow ratings must be compatible with pump discharge and
pump pressure rating. (See Nozzle Flow Rating Chart on page 34.)
3. Use only nozzles with a manufacturer’s pressure rating of at least the
operating pressure or a burst rating or no less than 3.0 times the desired
operating pressure.
4. Prior to installation, make sure the nozzle has no clogged orifices.
5. Apply anti-gall compound to the nozzle threads. DO NOT use Teflon
tape. Check blast nozzle size before installing the nozzle. Make sure the
nozzle orifices are not too small in order to prevent excessive system
pressure when the gun’s control valve trigger/pedal is depressed.

10 PI-120 March 2020
6. Use wrench flats (when available) or a properly adjusted
smooth jaw plier wrench (JS PN 64119) to tighten nozzle. Avoid using
pipe wrench as wrench marks will cause nozzles to crack and fail.
7. Blocked orifice(s) can cause excessive system pressure and failure. If
orifice(s) appear clogged or partially blocked with dirt or debris, remove
nozzle from MagJet and clean immediately.
8. Remove nozzle from service if:
A. Nozzle is split or damaged;
B. Nozzle sidewall is worn by more than 25% at any point;
C. Nozzle’s ability to hold pressure is questionable
D. Threads are missing or damaged
HIGH PRESSURE FITTINGS
1. Read General Safety section prior to installing fittings in system.
2. Use non-brass or non-cast iron fittings which are made for high
pressure waterblast use.
3. Use only high pressure fittings which are clearly marked with the
operating pressure.
4. High pressure fittings should have a known burst rating of not less than
3.0 times system operating pressure. Never use a damaged or corroded
fitting or one with damaged or missing threads.
5. Use only high pressure rated fittings and hose in the waterblast
system. For 40,000 psi waterblast service all fittings and hose should
have a minimum burst rating of 100,000 psi.
6. Use wrench flats (when available) or a properly adjusted smooth jaw
plier wrench (JS PN 64119) to tighten fittings. Avoid using pipe wrench as
wrench marks will cause high pressure fittings to crack and fail.
REPLACEMENT PARTS
1. Read General Safety section prior to repairing equipment and
installing replacement parts.
2. Only trained persons should be authorized to perform maintenance or
repairs to equipment.
3. Read and follow all manufacturer’s repair instructions. All tool, torque,
clearance and lubrication recommendations should be followed.
4. During replacement of any part, inspect mating part for wear and
replace if necessary.
5. Do not attempt to install or use a part whose dimensions, clearances,
function or use are suspect.

11PI-120March 2020
6. Test repaired equipment carefully and thoroughly before putting it into
service. Do not put any piece of repaired equipment into service if its
performance is questionable. If repaired equipment performance is
questionable, call manufacturer of repair parts for assistance.
This section includes most of information included in the yellow JET-
STREAM SAFETY WARNING pamphlet (PI-082), with the exception of the
flexible and rigid tube cleaning sections. Refer to PI-082 for complete
information.

12 PI-120 March 2020
Section 2: Product Description
The FXG2 Tornado GunTM is an air-actuated, dual-trigger waterblast con-
trol gun that is designed for maximum operator safety and field durability.
When used in conjunction with the 40K Remote Control Valve, the opera-
tor is able to build pressure in the system only when both gun triggers are
squeezed simultaneously. When both of the gun triggers are squeezed,
air from the control valve flows to the gun to rotate the barrel and front
nozzle head; an air signal from the gun is then sent back to the 40K Re-
mote Control Valve to close the control valve, which allows high pressure
water to flow to the gun. When either of the gun triggers are released,
the 40K Remote Control Valve “dumps”, or relieves, the high-pressure
water to atmospheric pressure. (See PI-121, 40K Multi-Mode Valve, for
complete instructions.)
The Tornado Gun utilizes a mandrel/seal configuration that can be easily
overhauled in the field. Refer to the chart on page 21 for the replacement
seal for the Tornado Gun.
The Tornado Gun is rated for 40,000 psi maximum operating pressure
and utilizes a 9/16” Type M male inlet connection. The Tornado Gun also
utilizes 1/4” pushlock-type air-hose connections for ease of hose removal
and/or replacement.

13PI-120March 2020
Product Specifications
Model Name FXG2 Tornado Gun
36” Barrel
(PN 66211)
FXG2 Tornado Gun
48” Barrel
(PN 66210)
Maximum Operating Pressure (psi) 44,000
Minimum Operating Pressure (psi) 10,000
Maximum Flow (gpm) 6
Maximum Operating Pressure (bar) 3,034
Minimum Operating Pressure (bar) 689
Maximum Flow (l/min) 26
Inlet Connection 9/16" Type M male
Speed Range (rpm) 2000 - 2500 1500-2000
Nozzle Types Accepted UHPX, UHPXi, UHPXD
Length (in) 52 63
Weight (lbs) 13.0 13.8
Length (mm) 1320 1600
Weight (kg) 5.9 6.3

14 PI-120 March 2020
Section 3: Preparation for Use
3.0 BEFORE PUTTING TORNADO GUN INTO SERVICE
NEW TORNADO GUN
3.1 Check the gun carefully upon removal from its shipping container for
damage. DO NOT assemble or use the gun if any damage is apparent or
the condition of any component is questionable.
3.2 New Tornado Guns are shipped completely assembled and ready
to be put into service. Adjust the front trigger/handgrip by loosening the
wing nut located at the top of the handle and moving and/or rotating the
trigger/handgrip to a desirable location and then re-tightening the wing
nut.
Both triggers/handgrips must always be used on gun to
maintain safe control and proper operation. Do not use a Tornado Gun
that has missing, modified, or broken triggers/handgrips. Loss of control
of the gun could result in severe injury or death.
3.3 Check the gun’s trigger operation. Both triggers should move
smoothly and return positively to the trigger’s fully open position when
released. If the trigger action is not smooth and positive, determine and
correct the cause before putting the gun into service.
Front handle plumbing should be confirmed as shown in the image be-
low. The lower connection is labeled AIR IN and this line comes from the
air drill. The upper connection is labeled as AIR OUT and this line goes to
MMV signal valve.

15PI-120March 2020
3.4 The FXG2 Tornado Gun must be inspected in conjunction with the
40K Remote Control Valve. With the nozzles removed from the nozzle
head, the system water should be turned on and both triggers of the
Tornado Gun should be squeezed and released. The 40K Remote Control
Valve should be checked for air leaks, and checked to make sure that the
Control Valve opens and closes correctly. If the Control Valve or the FXG2
Tornado Gun is not operating correctly, determine and correct the cause
before putting the FXG2 Tornado Gun into service.
PREVIOUSLY USED TORNADO GUN
Do not use a Tornado Gun that has not had the following
procedures and inspection previously performed on it.
The following cleaning and inspections must be performed on the gun
before the start of each working shift:
3.5 Inspect all components. The air and water hoses should be secure
and free of cracks, splits, or holes. Both triggers should move smoothly
and return positively to the trigger’s fully open position when released. If
the trigger action is not smooth and positive, determine and correct the
cause before putting the gun into service.
3.6 Inlet connection fitting and nozzle should be tight and in good condi-
tion. The hose support burst shield must be installed at the rear of the
gun at the water inlet connection.
3.7 Check the 40K Remote Control Valve’s operation in conjunction with
the Jetstream Tornado Gun. With the nozzles removed from the nozzle
head, the system water should be turned on and both triggers of the
Tornado Gun should be squeezed and released to confirm that water is
exiting the nozzle head and is being controlled by the valve. The 40K Re-
mote Control Valve should be checked for air leaks and checked to make
sure that the dump valve opens and closes correctly. If the Control Valve
is not operating correctly, determine and correct the cause before putting
the 40K Remote Control Valve into service.

16 PI-120 March 2020
Section 4: Setup
4.0 CONNECTING TORNADO GUN
4.1 Use only 40,000 psi rated fittings and hose for connecting the gun.
They should have a minimum burst rating of 100,000 psi.
4.2 Use of a 6’ safety whip hose is recommended. Safety whip hoses can
be replaced frequently for high operator safety.
4.3 Before tightening up cone and seat type connections, first clean and
inspect, apply antiseize compound to all threads, cone, and seat areas for
protection against galling.
A multi-mode control valve must be used with each gun
when 2 or more waterblast operators are connected to a single waterblast
unit. Each waterblast operator must have independent control of nozzle
pressure at their location.
4.4 Before installing the blast nozzle, check the nozzle size to make sure
its orifice(s) is not too small in order to prevent overpressurization when
the waterblast system is pressurized.
4.5 For operator safety, all high pressure hose sections connected to the
gun and Remote Control Valve should be in good condition and free of
leaks, kinks, and cover damage. The hose support burst shield must be
installed.
4.6 Always purge the hose string between the pump and the gun of dirt
and debris by pumping water through the hose with the waterblast pump
prior to connecting the hose to the gun.
Do not shorten gun barrels or use a Tornado Gun with a
working distance (primary air motor trigger to nozzle tip) of less than 40”.
Severe injury or death may result.

17PI-120March 2020
Section 5: Operation
Never tie or wedge the gun triggers in their closed position
or tap into the control valve’s air cylinder directly. This renders the dump
mode useless as a safety if the operator slips or otherwise loses control
of the gun and needs to relieve the system’s pressure by releasing the
triggers.
5.1 Do not connect multiple dump type control guns together to a single
high-pressure water source without the use of a multi-mode control valve
for each gun to make each gun operator independent of the other opera-
tors. Call Jetstream for assistance if two or more Tornado Guns must be
used in the waterblast system.
5.2 Make sure that the oil flow through the Multi-Mode Valve from the
oiler is set correctly. To set the oiler, close off the flow control knob by
turning it clockwise, then turn the adjustment knob counter-clockwise
approximately 2 turns (or visually confirm 1-2 drops every 5 seconds
while blasting). See PI-121, 40K Multi-Mode Valve.

18 PI-120 March 2020
5.3 Make sure that the air regulator is set correctly. The pressure should
be set for no lower than 80 psi and no higher than 120 psi while the gun
is in operation (not at rest). To set the proper air pressure, pull up on the
air regulator adjustment knob and turn clockwise for more air pressure
and counter-clockwise for less air pressure. Once the air pressure is set,
push down on the adjustment knob until it “clicks” and locks. See PI-121,
40K Multi-Mode Valve.
5.4 Check the Remote Control Valve for smooth and proper operation. DO
NOT use the Remote Control Valve if it has not been cleaned and in-
spected before the start of the working shift. See PI-121, 40K Multi-Mode
Valve.
5.5 Never operate the Tornado Gun if the Remote Control Valve does not
fully open and reduce the system pressure to near zero immediately when
its triggers are released. The control valve must relieve the water pres-
sure immediately to below 200 psi when the trigger/pedal is released.
5.6 Be sure the retaining nut is seated against the housing shoulder be-
fore operating (see WARNING on page 24). Attempting to run at pressure
with the nut backed off the shoulder will result in catastrophic seal failure.
5.7 Never operate the Tornado Gun without the hose support burst
shield. This supports the high pressure hose, acting as a strain relief
while providing coverage protection in case of a hose or fitting leak.
PROPER WATERBLAST TECHNIQUE
5.8 The gun operator must maintain firm solid footing to counter the
gun’s blasting reaction. This rearward reaction is usually 40 to 60 pounds
of force, depending on nozzle selection, pressure, and flow. Use fall pro-
tection when blasting on scaffolding or sloping surfaces. DO NOT operate
the gun while standing on slippery surfaces.
5.9 Check high pressure seal condition at start of shift and after every 2
hours of operation by pointing nozzles safely away from any target and
pulling both triggers. Operate the gun in this manner at 15,000 - 20,000
psi and at 40,000 psi while viewing the weep holes in the swivel nut
directly above the air drill. Any drips or leaks indicate a worn HP seal and

19PI-120March 2020
require seal replacement. Do not blast with a leaking HP seal as this will
allow hot water to drip onto operator’s hands and cause water to flush
grease from the swivel bearings and damage the swivel shaft.
5.10 Make sure that no water is flowing out of the dump port of the
Remote Control Valve while blasting. The air pressure while blasting must
be greater than 80 psi and less than 120 psi.

20 PI-120 March 2020
Section 6: Service
Figure A