JETStream MAGJET X40 Instruction sheet

Read these instructions thoroughly before installing, connecting, or using the
MAGJET X40. 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 MAGJET X40 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
MAGJET™ X40 (PN 64635)
PI-162
The MagJetTM is a self-powered rotating nozzle that uses two or four
replaceable straight-pattern sapphire nozzles. These nozzles rotate at
a controlled speed while producing concentrated streams to give you
more cleaning power than a fan tip. The MagJet comes equipped with an
eddy-current braking system which controls rotation speed for maximum
cleaning power and minimum wear. The MagJet rotary seal is housed in
an innovative, patented cartridge design which allows quick replacement
in the field. The MagJet is rated for 3,000 bar (43,511 psi) maximum
working pressure.

2PI-162June2019
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 ....................................................................17
Section 6: Service........................................................................18
Section 7: Troubleshooting ...........................................................20
Appendix A
Exploded View .............................................................................22
Parts Placement...........................................................................23
Appendix B
Accessories .................................................................................24
UHPX / UHPXi / UHPXD Nozzle......................................................24
Head Assemblies .........................................................................24
Seal Cartridge/Seal Kit.................................................................25
Tool Kit ........................................................................................26
Shaft Kit.......................................................................................26
Aluminum External Guard Kit (PN 67082).....................................27
Flow Charts .................................................................................28
Warranty......................................................................................32

3PI-162June 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.

4PI-162June2019
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-162June 2019
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.
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-162June2019
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.
W
ARNING
WW
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-162June 2019
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-162June2019
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.
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.
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-162June 2019
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 28.)
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.

10 PI-162 June 2019
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.
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 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.

11PI-162June 2019
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-162 June 2019
Section 2: Product Description
The MagJetTM surface cleaning nozzle is a self-powered rotating nozzle
that uses two or four straight-pattern sapphire nozzles. These nozzles
rotate at a controlled speed while producing concentrated streams to give
you more cleaning production than a fan tip.
The MagJet has an eddy current magnetic braking system which controls
rotational speed for maximum cleaning and minimum wear.
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 MagJet and any
electronic medical devices.
The MagJet is designed to be completely rebuilt in the field in less than
five minutes. It comes standard with an aluminum cover which protects
the rotating head and nozzle tips from abrasion to help protect your
investment.
CAUTION
The use of gloves is recommended when handling the tool
after operation as the body may reach temperatures greater than 200F.
The MagJet is rated up to 3000 bar (43,511 psi). The maximum working
pressure is stamped on the main body of the nozzle.

13PI-162June 2019
Product Specifications
Model Name MagJet X40 (PN 64635)
Maximum Operating Pressure (psi) 44,000
Minimum Operating Pressure (psi) 30,000
Maximum Flow (gpm) 11.0
Maximum Operating Pressure (bar) 3000
Minimum Operating Pressure (bar) 2070
Maximum Flow (l/min) 26.5
Inlet Connection 9/16" HP Female
Speed Range (rpm) 1000 - 2800
Nozzle Types Accepted UHPX, UHPXD, UHPXi
Diameter (in) 2.25"
Length (in) 9.37"
Weight (lbs) 4.0
Diameter (mm) 57.15
Length (mm) 238.00
Weight (kg) 1.8

14 PI-162 June 2019
Section 3: Preparation for Use
3.0 BEFORE PUTTING MAGJET X40 INTO SERVICE
NEW MAGJET X40
3.1 Check the MagJet X40 carefully upon removal from its shipping
container for damage.
3.2 A new MagJet X40 is shipped assembled with exception of the
nozzles. The tool is ready to use upon installation of nozzles per instruc-
tions in Section 4: Setup.
3.3 Review nozzle charts in the Appendix to determine proper flow rates
for each application.
PREVIOUSLY USED MAGJET X40
Before installing the MagJet X40 onto control gun:
3.4 Inspect all components. The MagJet X40 rotating nozzle head should
turn by hand with minimal resistance.
3.5 The MagJet X40 should be inspected and cleaned to ensure that no
debris has entered an orifice that could plug the nozzle and over-pressur-
ize the system.

15PI-162June 2019
Section 4: Setup
4.0 CONNECTING MAGJET X40
The MagJet X40 must be used with a minimum control gun barrel length
of 48 inches to prevent nozzle discharge from accidentally striking the
operator’s feet, legs, or body.
4.1 Prior to installing the MagJet X40 onto the control gun barrel, engage
the pump and depress the control gun trigger to clear any debris from the
system.
The MagJet X40 uses a 9/16” HP FML inlet connection. Apply anti-seize
compound to the gland threads and cone on the male end of the adapter.
NOTE: Do not use Teflon tape.
Install the MagJet X40 onto the adapter and tighten to 50 lbs. ft.

16 PI-162 June 2019
4.2 NOZZLE INSTALLATION
Before installing the nozzles into the MagJet X40, verify each nozzle is
the correct size, and inspect each nozzle to ensure the sapphire orifice is
not damaged or missing. 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. Refer to the charts in Appendix B for the
proper flow rate and thrust for your application.
NOTE: The MagJet X40 may be configured with either four nozzles or
two nozzles and two plugs. For a given flow, the larger streams obtained
by using the two-nozzle configuration may be preferred for some cleaning
applications.
1. Use a 5/32” hex key to remove the bolt holding the head cover in
place to allow access to the nozzle ports in the head.
2. Apply anti-seize compound to the male threads of the nozzle or plug
(and cone if using UHPX nozzles) and install using an adjustable or 5/16”
wrench. Hand tighten to 50 lbs. in.
3. Apply medium strength Loctite to the threads of the bolt and reinstall
the head cover. Screw in an torque the bolt to 100 lbs. in.
W
ARNING
WW
• A Multi-Gun Valve or similar system must be used when two or more
dump gun operators are connected to a single waterblast unit. Each
gun operator must have independent control of nozzle pressure at
their location.
• Do not exceed flow in chart for operation with specific head, nozzle,
and pressure configuration. The MagJet X40 should only be operated
in the specified regions of the chart or it will over speed. Over speed-
ing the tool will cause it to heat up and fail bearings and magnets.

17PI-162June 2019
Section 5: Operation
IMPORTAN
T
Water cleanliness is very important. A filter no larger
than 10 microns should be used on the water supply inlet.
5.1 Use only thoroughly trained operators to perform cleaning operations
with the MagJet X40.
5.2 Do not connect multiple dump type control guns together to a single
high pressure water source without the use of a Multi-Gun Valve (MGV)
to make each gun operator independent of the other operators. Call
Jetstream for assistance if two or more dump type control guns must be
used in the waterblast system.
5.3 The gun operator must be made aware that the MagJet X40 nozzle’s
discharge jet(s) can inflict serious body wounds.
5.4 Carefully inspect the gun for damage or missing parts. Make sure
all components work smoothly and freely.
5.5 Place barricades with warning signs or barricade tape around work
area. This includes the waterblast unit and all high pressure hoses.
5.6 The gun operator must be outfitted with safety apparel. The mini-
mum: hard hat with plastic face shield, rainsuit, steel toe non-skid boots,
shin and foot guards and non-slip gloves.
5.7 Before starting to blast, check for correct barrel length (48”). Get into
blasting position with the gun. Move the gun around to make sure the
blast nozzle cannot cross any part of the legs, feet or body. Check gun for
smooth and proper operation. DO NOT use the gun or MagJet X40 if it
has not been cleaned and inspected before the start of the working shift.
5.8 Protect the control gun in freezing conditions. Stop using the gun
if any low temperature operational problems occur. Drain the gun and
remove its cartridge if it is not in use in freezing conditions.

18 PI-162 June 2019
17
16
215 14 13 8
18
12
1
5
6
7
11 9&10
3
2
4
Section 6: Service
Figure A
Assembly PN 64635
Item Qty Part Number Description
1 1 57938 Shaft
2 2 57926 Oil Seal
3 4 64637 Capscrew, #8-32
4 1 64638 Front Cover
5 2 57933 Angular Contact Bearings
6 1 64992 Shim. Spring Steel
7 1 64991 Deep Groove Ball Bearing
8 1 57937 Current Sleeve
9 4 65005N North Magnet
10 4 65005S South Magnet
11 1 57928 Pilot Bearing
12 1 64636 Main Housing
13 1 57931 Wave Spring
14 1 57935 O-ring, 1-1/2 ID
15 1 57918 Pilot Bearing Retainer
16a-16d* 1 57911 Seal Cartridge
16a 1 57910 Retainer
16b 2 57924 Pin
16c 1 58208 Mandrel
16d.1-16d.5* 1 65445 Seal Kit
16d.1 1 27052 O-ring
16d.2 1 57909 Bushing
16d.3 1 57923 Retaining Ring
16d.4 1 58140 H.P. Seal
16d.5 1 58922 Washer
17 1 57916 Seal Cartridge Housing
18 1 66982 Capscrew, #8-32, Security
NOTE: Part numbers and descriptions are subject to change without notice.
*Parts breakdown for seal cartridge and seal kit can be seen in Appendix B

19PI-162June 2019
6.0 MAGJET X40 MAINTENANCE
6.1 REPLACING THE SEAL CARTRIDGE (PN 57911)
CAUTION
The use of gloves is recommended when handling the tool
after operation as the body may reach temperatures greater than 200F.
1. Unscrew and remove the Seal Cartridge Housing (PN 57916) from the
Pilot Bearing Retainer (PN 57918).
2. Unscrew the Seal Cartridge Retainer (PN 57910) from the Seal Cartridge
Housing (PN 57916).
3. When the Seal Cartridge Retainer (PN 57910) is fully unscrewed, pull it
out of the Seal Cartridge Housing (PN 57916) to remove the Seal Cartridge
Assembly (PN 57911).
4. Before install the new Seal Cartridge Assembly (PN 57911), apply nickel
anti-seize compound to the Seal Cartridge Retainer (PN 57910) thread and
o-ring Lubricant to the o-ring on the plastic seal of the Seal Cartridge As-
sembly (PN 57911).
5. Push the new Seal Cartridge Assembly (PN 57911) into the Seal Cartridge
Housing (PN 57916) and begin threading the Seal Cartridge Retainer (PN
57910) into the Seal Cartridge Housing (PN 57916) by hand.
6. Tighten and torque the Seal Cartridge Retainer (PN 57910) to approxi-
mately 40 lbs. ft.
7. Thread the Seal Cartridge Housing (PN 57916) back into the Pilot Bearing
Retainer (PN 57918) and tighten with a wrench. Rotate the head assembly
as the Seal Cartridge Housing is being screwed into the Pilot Bearing
Retainer to ensure that the anti-rotation pins in the mandrel of the seal
cartridge do not bind with the anti-rotation tabs at the end of the shaft.
See YouTube for videos showing MagJet X40 service.

20 PI-162 June 2019
Section 7: Troubleshooting
7.0 MAGJET X40 TROUBLESHOOTING
Problem Remedy
The nozzle leaks
from all weep holes
of the seal housing.
Note: Pressure is required to push the seal cartridge
mandrel into the shaft to create a seal, so some leak-
age at low pressure is normal and expected. During
operation, some leakage from the bottom weep holes
of the seal housing is normal during the life of the
seal cartridge. If a stream of water is leaking continu-
ously from all of the weep holes of the seal housing,
including the top hole, the seal cartridge should be
removed for inspection.
There are several potential causes if leakage is noted
from all weep holes:
• Loose cartridge nut: Excessive leakage will occur
if the seal cartridge was not torqued properly dur-
ing installation and comes loose during operation.
Reinstall the seal cartridge and torque to 40 lb-in.
• High-pressure seal failure: Inspect the plastic seal
of the seal cartridge. If the inner diameter of the
plastic seal is severely jetted at the front where
it seats into the bronze backup bushing, the seal
has failed. Replace the seal cartridge.
• Damaged mandrel tip and cone in shaft: Inspect
the tip of the mandrel for damage from jetting.
If damage has only occurred to the tip of the
mandrel, but not to the conical mating surface in
the shaft, replacing the seal cartridge may correct
the problem. If the shaft is damaged and will not
seal with a new mandrel, the tool will need to be
rebuilt with a new mandrel. This may occur as a
result of normal wear at the end of the life of the
tool as a result of many seal cartridge changes,
or as a result of extended operation with a loose
seal cartridge that leads to jetting between the
mandrel and shaft.