JETStream 4" J-FORCE GEN II JF4X22 Instruction sheet

Read these instructions thoroughly before installing, connecting, or using the
J-FORCE nozzle. 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 J-FORCE nozzle 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
4” J-FORCE™ GEN II
JF4X15 (PN 66215)
JF4X22 (PN 66216, 66217, 66218)
PI-190
The 4” J-ForceTM Gen II is a self-powered rotating nozzle designed to eas-
ily navigate and clean 4” pipes with up to 90° bends. The 4” J-Force Gen
II has front, side, and rear jets that clear blockages, clean, and provide
thrust to propel the tool down the pipe. The nozzle comes equipped with
an eddy-current braking system which controls rotation speed for maxi-
mum cleaning power and minimum wear.

2 PI-190 June 2019
Table of Contents
Section 1: Safety ...........................................................................3
Section 2: Product Description ....................................................12
Section 3: Preparation for Use .....................................................14
Section 4: Setup ..........................................................................15
Section 5: Operation ....................................................................16
Section 6: Service........................................................................17
Section 7: Troubleshooting ...........................................................20
Appendix A
Exploded Views............................................................................21
Parts Placement...........................................................................22
Appendix B
Accessories .................................................................................23
JS2 Nozzles/Plug.........................................................................23
P2TCS Nozzles.............................................................................24
Backout Preventer .......................................................................24
Bushing Removal Tool (PN 67013)................................................24
Appendix C
Flow Charts .................................................................................25
Warranty......................................................................................32

3PI-190June 2019
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 of maintenance of
waterblast equipment and to provide adequate supervision of personnel
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].
D
ANGER
Incorrect Use of High Pressure Waterblast
Equipment May Cause Serious Injury
Read these instructions in their entirety
before using any JETSTREAM products.

4 PI-190 June 2019
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-190June 2019
11. Properly tighten all high pressure connections. All NPT connections
must have a minimum engagement of four (4) threads. Pipe (NPT)
connections should be made up hand tight plus two (2) full wrenched
turns. Do not tighten NPT threads past two (2) wrenched turns.
CAUTION
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.
12. All high pressure hose connections require a hose restraint (whip
check), including connection at fluid end discharge.
13. 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.
14. 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.
15. 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.
16. 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.
17. 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”.

6 PI-190 June 2019
18. 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.
19. Only trained persons should be authorized to perform any mainte-
nance or repair.
20. Following any repairs, the system should be operated at low pressure
for test. Bring equipment up to operating pressure slowly.
21. 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.
22. Store components properly by protecting them from damage when
not in use. Be sure all safety warning tags and markers remain intact.
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.
W
ARNING
WW
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.

7PI-190June 2019
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.
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. 10,000 psi operating pressure high
pressure must have a minimum 25,000 psi burst rating. 8,000 psi
operating hose must have a minimum 22,000 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 25.)

8 PI-190 June 2019
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 3 - 4 wraps of Teflon tape to male connection threads on the
nozzle. Apply anti-seize compound over the sealant tape for additional
protection against galling in connection threads. Wrench connection 1
1/2 - 2 turns past hand tight. A minimal thread engagement of four (4)
threads should exist on all Jetstream NPT pipe connections.
6.
CAUTION
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 J-Force 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
FLEXIBLE TUBE CLEANING LANCES
1. Read General Safety section and Nozzle Safety Warnings prior to
connecting flex lances.
2. Do not use a flex lance with a burst rating less than 2.25 times the
pressure at which it will operate. 10,000 psi operating pressure flex
lances must have a minimum 22,000 psi burst rating. 8,000 psi operat-
ing pressure flex lances must have a minimum 18,000 psi burst rating.
3. Do not use a flex lance that has an unknown burst or unknown
manufacturer’s operating pressure rating.
4. Never use a lance which is kinked, worn, frayed or whose abilities
to hold pressure is questionable.
5. Do not use a lance which has damaged or missing threads.
6. Clearance between lance and tube deposits must be sufficient to
allow unrestricted backflow of water and debris. With tubes containing
hard deposits this clearance should be 1/8” minimum on the diameter
(or 1/16” per side) of the lance. With tubes containing soft, pliable
deposits this clearance should be greater. Insufficient side clearance
may cause lance to blow back toward operator.

9PI-190June 2019
7.
W
ARNING
W
W
Serious injury may occur should a lance with live nozzle
exit tube. Use anti-withdrawal device to prevent lance from exiting tube
unexpectedly.
8. The following JETSTREAM lance accessories are strongly
recommended for safer lance operation:
A. Lance Strain Relief - Helps prevent lance inlet end fitting failure.
B. Lance Stinger - Affords the operator greater control of nozzle.
Establishes a “safety zone” so operator knows when nozzle is about to
exit tube; will eliminate possibility of nozzle and lance “double back”
toward operator within large diameter pipe.
C. Anti-withdrawal device prevents the lance from exiting the tube
or pipe. Contact JETSTREAM for additional information regarding these
products.
9. Use only nozzles designed for use with flex lances (i.e. nozzle
drilled with sufficient rearward orifices so nozzle pulls lance through
tube.)
10. If lance end fittings do not have wrench flats, use properly adjusted
smooth jaw plier wrench (JS PN 64119) to connect lance to pressure
source and nozzle onto lance. Apply wrench on lance and fitting directly
behind end fitting thread (not on fitting ferrule or collar) when
installing nozzle on lance. Do not clamp on the lance hose itself with vise
when installing nozzle.
11. Avoid rough handling, stretching or straining of lance.
12. Never attempt to “ramrod” flex lance through blockages or to repair
or recouple lances.
13. After use, drain, coil and store lance properly. Be sure safety tags
remain intact.
RIGID TUBE CLEANING LANCES
1. Read General Safety section and Nozzle Safety Warnings prior to
connecting rigid lances.
2. Do not use a rigid lance with a burst rating less that 3.0 times the
pressure at which it will operate. 10,000 psi operating pressure rigid
lances must have a minimum 30,000 psi burst rating. Do not use a rigid
lance that has an unknown burst or unknown manufacturer’s operating
pressure rating.
3. Clearance between lance and tube must be sufficient to permit the
unrestricted backflow of water and debris. With tubes containing hard
deposits this clearance should be 1/8” minimum on the diameter (or

10 PI-190 June 2019
1/16” per side) of the lance. With tubes containing soft, pliable deposits
this clearance should be greater. Insufficient side clearance may cause
lance to blow back toward operator.
4. Be sure nozzle, lance and adapter thread sizes are compatible before
installing nozzle and adapter on lance. Do not use a rigid lance that has
damaged or missing threads.
5. Use wrench flats (when available) or a properly adjusted smooth jaw
plier wrench (JS PN 64119) to connect lance. Do not use pipe wrench as
wrench marks will cause high pressure components to crack and fail.
6. A rigid lance over 4 ft long requires two men for support and safe
operation. Operator at tube should use a foot control gun so he can
instantly relieve system pressure in case of emergency.
7. When using and moving lance, support it in a manner to avoid stress
and possible breakage at inlet end connection.
8. Never ”ramrod” lance into tube blockage.
9. Transport and store lances in tubes or racks to avoid bending,
corrosion or other damage. Damaged lances (bends, mars) should be
removed from service.
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 10,000 psi waterblast service all fittings and hose should
have a minimum burst rating of 25,000 psi; for 15,000 psi service they
should have a minimum burst rating of 37,500 psi; for 20,000 psi service
they should have a minimum burst rating of 50,000 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.

11PI-190June 2019
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.
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 concludes all the same information included in the yellow
JETSTREAM SAFETY WARNING pamphlet (PI-082).

12 PI-190 June 2019
Section 2: Product Description
The 4” J-ForceTM Gen II is a self-powered rotating nozzle that uses up to 6
JS2 or P2TCS nozzles.
The 4” J-Force Gen II has many features, including:
• Spins on a film of high pressure water and has no ball bearings to
replace. No oil or grease is needed for lubrication.
• Comes equipped with an eddy-current braking system which controls
rotation speed for maximum cleaning power and minimum wear.
• Completely field repairable (in less than 5 minutes)
• 10° forward, 100° radial, 135° rearward nozzle angles
• Designed to easily navigate and clean 4” pipes with 90° bends.
W
ARNING
W
W
This system contains several high-energy, rare-earth
magnets that produce a magnetic field. Persons with a pacemaker or
other electronic medical device must use extreme caution when handling
or in close proximity. It is recommended that a minimum distance of 6
inches (152mm) be maintained at all times between the J-Force and any
electronic medical devices.
CAUTION
The use of gloves is recommended when handling the tool
after operation as the body may reach temperatures greater than 200F.

13PI-190June 2019
Product Specifications
Model Name JF4X15 JF4X22
Maximum Operating Pressure (psi) 15,000 22,000
Minimum Operating Pressure (psi) 2,500
Maximum Flow (gpm) 40
Maximum Operating Pressure (bar) 1000 1550
Minimum Operating Pressure (bar) 170
Maximum Flow (l/min) 150
Inlet Connection 3/8" NPT 3/4" Type M
9/16” MP LH/RH
Tube or Pipe I.D. (in) 4
Tube or Pipe I.D. (mm) 102
Speed Range (rpm) 1000 - 2000
Nozzle Types Accepted JS2, P2TCS
Nozzle Pattern 2 @ 10°, 2 @ 100°, 2 @ 135°
Diameter (in) 2.75
Length (in) 3.85
Weight (lbs) 3.85 3.90
Diameter (mm) 70
Length (mm) 98
Weight (kg) 1.75 1.77

14 PI-190 June 2019
Section 3: Preparation for Use
3.0 The 4” J-Force Gen II is mounted to a flexible rubber waterblast hose
that allows it to navigate 4” pipes with bends up to 90°.
3.1 Before use, disassemble the 4” J-Force Gen II and inspect the man-
drel and bushing for wear, damage, o-ring condition, etc. and repair or
rebuild as necessary.
3.2 Clean the 4” J-Force Gen II by wiping internal components using a
soft cloth and a water dispersing lubricant like WD-40.
3.3 See Flow Charts in Appendix C to choose nozzle configuration, flow
rate, and desired operating pressure. The 4” J-Force Gen II is equipped
with two forward-facing ports at 10°, two radial ports at 100°, and two
rearward-facing ports at 135°. Choose the nozzle configuration based on
the type of cleaning application and desired operating pressure and flow.

15PI-190June 2019
Section 4: Setup
4.0 CONNECTING 4” J-FORCE GEN II
Prior to installing the 4” J-Force Gen II onto the hose, flush the system to
clear any debris.
For 22,000 psi operation (3/4” Type M Male, 9/16”MP LH/RH Inlet)
1. Apply anti-seize compound to the threads of the Type M connection or
to the male 9/16”MP hose/lance end.
2. Install the JF4X22 and tighten to 90 lb-ft.
For 15,000 psi operation (NPT Female Inlet)
1. Apply 3-4 wraps of Teflon thread sealant tape to the male NPT hose
end.
2. Apply anti-seize compound over the sealant tape for protection against
galling in connection threads.
3. Tighten the connection 1-1/2 to 2 turns past hand tight. All NPT pipe
connections should have a minimum thread engagement of 4 threads.
4.1 Prior to installing nozzles in the 4” J-Force Gen II, turn on the pump
and run at low pressure to flush debris from the system. Refer to nozzle
charts in Appendix C to select the proper nozzle configuration for your
application.
NOTE: Nozzle configurations must be carefully selected to ensure that
they provide the necessary pull and torque. If a non-standard configura-
tion is required, contact a Jetstream representative to verify that it is safe
and that the tool will function properly.
4.2 An anti-withdrawal device (backout preventer) should be used to
prevent the tool from accidentally exiting the pipe under high pressure.
Hose restraints (whip checks) should be used at all high pressure hose
connections including the fluid end discharge. See Appendix B for a list of
backout preventers.
4.3 Contact Jetstream representative for assistance.

16 PI-190 June 2019
Section 5: Operation
5.0 OPERATING J-FORCE
As per the WJTA-IMCA Recommended Practices, all operators shall
follow the OSHA regulations for personal protective equipment. (OSHA
guidelines for Personal Protective Equipment are available in document
number 3151-12R 2004, which can be obtained from www.osha.gov.)
All operators shall be issued suitable head protection, eye protection,
hearing protection, body protection, hand and foot protection and respira-
tory protection (if needed). For detailed specifications on all protections
required, refer to the WJTA-IMCA ‘Recommended Practices for the Use of
High Pressure Waterjetting Equipment’ Section 6, Protective Equipment
For Personnel.
CAUTION
The 4” J-Force Gen II can be used for minimum service
temperature of -20°C (-4°F) and a maximum service temperature of
115°C (240°F).ttUse at lower or higher than recommended temperatures
may result in premature o-ring seal failure.
5.1 Start by slowly increasing pressure to 500 psi and check the entire
system, including all connections, for leaks. Increase pressure in incre-
ments, pausing at each to inspect system for leaks, proper rotation of
tool, temperature, and other operational anomalies. If any problems are
discovered, lower pressure back to zero and turn off source of power
before making any adjustments.
5.2 During operation, it is normal for water to leak out of the front of
the head from around the front nozzle (or front plug). This leak-by water
comes from the water-bearing that the tool operates on.
5.3 When removing the JF4X22 nozzle with the 3/4” Type M male hose
connection (PN 66216) from the hose, the Type M Adapter may unscrew
from the inlet nut (PN 65922) and stick in the hose end. The Type M
Adapter (PN 65923) has a 3/16” internal hex cutout that allows an allen
wrench or hex key to be used to remove the adapter from the hose end.
Using a wrench on the external threads of the adapter will damage the
threads.

17PI-190June 2019
Section 6: Service
JF4X15 (PN 66215) & JF4X22 (PN 66216, 66217, 66218)
1*
2
3
4
5
6
7
8b
8c
8a
8d
8e
8e
8d
Figure A
Item Qty Part Number Description
1 1 65923 Connector, Mandrel
(ONLY used in 66216)
2 1 64864 Retaining Ring
3 1 64007 Brake Adjuster
41
65906 Inlet Nut (Assy 66215)
65922 Inlet Nut (Assy 66216)
65921 Inlet Nut (Assy 66217)
65919 Inlet Nut (Assy 66218)
5 1 64103 Wear Ring
6 4 66220 Wear Ring Screws
7 1 66219 Head Assembly
8a-8e 1 66248 Rebuild Kit
8a 1 66336 Mandrel
8b 1 52349 Flange Bushing
8c 1 64100 Thrust Bearing
8d 2 52683 Backup Ring, Bushing
8e 2 26760 O-ring, Bushing
NOTE: Part numbers & descriptions subject to change without notice.

18 PI-190 June 2019
6.0 4” J-FORCE GEN II MAINTENANCE
When not in use, the 4” J-Force Gen II should be cleaned to remove any
debris, deposits, or contaminants that could impede rotation, and sprayed
with water-dispersing lubricant (e.g. WD-40) for storage until next use.
The 4” J-Force Gen II utilizes water-bearing technology coupled with
an eddy-current braking system to control the rotation speed. No oil is
required, allowing for a quick and pain-free rebuild of the tool.
See YouTube for videos showing 4” J-Force Gen II service.
CAUTION
The use of gloves is recommended when handling the tool
after operation as the body may reach temperatures greater than 200F.
6.1 DISASSEMBLY FOR MAINTENANCE (See Figure A)
1. While holding the inlet nut (4) stationary in a vice or with a 1-1/4”
wrench, unscrew the mandrel (8a) by turning it counterclockwise
with a 3/8” socket wrench.
2. Once the mandrel is unthreaded from the inlet nut, the inlet nut
and adjuster (3) will separate from the head assembly (7). Once the
magnets in the back of the head assembly are exposed, take care
to protect them from mechanical damage. The magnets are fragile
and will crack upon any significant impact.
3. Remove the mandrel (8a) and thrust bearing (8c) from the head
assembly (7).
4. Remove the flange bushing (8b) from the head assembly (7) by
pushing it out from the back side. The bushing removal tool (PN
67013) may be used to make contact with the back edge of the
flange bushing to push it out, as shown below. Note orientation of
tool.

19PI-190June 2019
6.2 ASSEMBLY (See Figure A)
1. Ensure the new mandrel (8a), flange bushing (8b), and head assem-
bly (7) are clean.
2. Install new o-rings (8e) and backup rings (8d) onto the flange bush-
ing (8b). Apply a light coat of o-ring lube to o-rings to reduce friction
and ease installation. See Figure B for proper orientation of o-rings
when installed.
Figure B
3. Wet o-rings (8e) on the flange bushing (8b) very lightly with water
or grease. Slide the flange bushing (8b) into the head assembly (7)
from the front side.
4. Thread the adjuster (3) onto the inlet nut (4) until the inlet nut (4)
seats fully into the adjuster (3).
5. Insert the assembled adjuster and inlet nut into the back of the head
assembly. The adjuster (3) should slide in easily without binding
between the OD of the magnet ring and ID of the groove in the head.
6. Insert the thrust bearing (8c) into the front bore of the head as-
sembly (7) so that it sits flat against the flange of the flange bushing
(8b).
7. Apply Loctite 242 Blue Medium-Strength Threadlocker to the thread
at the end of the mandrel (8a). Hold the inlet nut (4) hex stationary in
a vice or with a 1-1/4” wrench and push the mandrel (8a) through
the flange bushing (8b) into the inlet nut (4). Use a 3/8” socket
wrench to torque to approximately 30 lb-ft.
8. Slide the wear ring (5) onto the head assembly (7) with the nozzle
installation clearance cutouts facing the front end of the head as-
sembly. Attach the wear ring (5) to the head assembly (7) by rotat-
ing the wear ring (5) so that the holes in the wear ring (5) line up
with the holes in the head assembly (7) and threading the wear ring
screws (6) into the head assembly (7).
9. Use retaining ring pliers to install the retaining ring (1) into the
groove closest to the adjuster (3) on the inlet nut (4).

20 PI-190 June 2019
Section 7: Troubleshooting
7.0 4” J-FORCE GEN II TROUBLESHOOTING
Problem Possible Cause Remedy
Will not spin Nozzles worn, plugged,
or wrong size
Replace nozzles
O-ring / backup ring
failure
Replace o-rings /
backup rings
Galling between mandrel
and flange bushing
Replace damaged com-
ponents (rebuild kit)
Debris Clean*
Spins slowly Incorrect nozzle size or
worn nozzles
Replace nozzles
Debris Clean*
Low pressure Nozzles worn, plugged,
or wrong size
Replace nozzles
O-ring / backup ring
failure
Replace o-rings /
backup rings
Connections not tight,
leak
Find and repair leak
Low Pull Nozzles worn, plugged,
or wrong size
Replace Nozzles
Type M Adapter
stuck in hose end
-- See Section 5.3
* To clean the J-Force follow 6.1 DISASSEMBLY FOR MAINTENANCE.
If the mandrel and bushing surfaces are free from high spots and major
scratches during inspection and cleaning, and the problem is not resolved,
the parts must be replaced. Reassemble according to 6.2 ASSEMBLY.