NHTSA ID Number: 11019735
Manufacturer Communication Number: SB-24-367
TSB/Document Date: 2025-06-25
Summary
Remove Solenoid Valve
Bulletin Number:
SB 24-367
Release Date:
August 28, 2024
Distribution:
Heil Dealers, Heil Technical Services, Heil Customer Care
Subject:
CNG Solenoid Removal
NOTE: READ THIS BULLETIN IN ITS ENTIRETY BEFORE BEGINNING ANY REPAIR WORK.
This Service Bulletin outlines the process to remove the CNG solenoid.
1.
PLANNING INFORMATION
A.
Products Affected
This Service Bulletin applies to Heil CNG tailgate system trucks as shown in Table 1 and Table 2.
Table 1. Products Affected – Front End Loader
FRONT END LOADER SERIAL #
HPE4969281
HPE4969489
HPE4969733
HPE4969734
HPE4969759
HPE4969760
HPE4969797
HPE4969802
HPE4969811
HPE5019227
HPS4968856
HPS4968858
HPS4968869
HPS4968875
HPS4968912
HPS4968938
HPS4968942
HPS4968964
HPS4968992
HPS4969015
HPS4969026
HPS4969061
HPS4969114
HPS4969200
HPS4969206
HPS4969211
HPS4969255
HPS4969256
HPS4969257
HPS4969261
HPS4969262
HPS4969272
HPS4969280
HPS4969284
HPS4969285
HPS4969292
HPS4969293
HPS4969303
HPS4969304
HPS4969331
HPS4969332
HPS4969356
HPS4969366
HPS4969367
HPS4969377
HPS4969391
Copyright 2024, The Heil Co.
HPS4969393
HPS4969456
HPS4969482
HPS4969516
HPS4969517
HPS4969518
HPS4969519
HPS4969523
HPS4969524
HPS4969526
HPS4969563
HPS4969569
HPS4969570
HPS4969571
HPS4969580
HPS4969587
HPS4969593
HPS4969598
HPS4969599
HPS4969600
HPS4969601
HPS4969602
HPS4969603
HPS4969605
HPS4969610
HPS4969631
HPS4969632
HPS4969638
HPS4969646
HPS4969664
HPS4969665
HPS4969666
HPS4969673
HPS4969677
HPS4969678
HPS4969705
HPS4969707
HPS4969741
HPS4969773
HPS4969774
HPS4969778
HPS4969793
HPS4969794
HPS4969795
HPS4969796
HPS4969798
HPS4969799
HPS4969800
HPS4969801
HPS4969804
HPS4969805
HPS4969810
HPS4969812
HPS4969819
HPS4969820
HPS4969821
HPS4969825
HPS4969826
HPS4969840
HPS4969841
HPS4969842
HPS4969843
HPS4969844
HPS4969845
HPS4969847
HPS4969849
HPS4969863
HPS4969864
HPS5019175
HPS5019357
HPS5019358
HPS5019359
HPS5019360
HPS5019361
HPS5019362
HPS5019363
HPS5019364
HPS5019365
LRE6001279
LRE6001280
LRE6001285
LRE6001291
LRE6001301
LRE6001305
LRE6001316
LRE6001317
LRS6001289
LRS6001294
LRS6001304
Page 1 of 12
Table 2. Products Affected – Side Loader
SIDE LOADER SERIAL #
7E7309738
7E7309777
7E7309859
7E7309926
7S7309427
7S7309635
7S7309673
7S7309676
7S7309677
7S7309678
7S7309683
7S7309698
7S7309699
7S7309701
7S7309702
7S7309711
B.
7S7309712
7S7309715
7S7309716
7S7309720
7S7309721
7S7309723
7S7309736
7S7309739
7S7309741
7S7309742
7S7309743
7S7309744
7S7309745
7S7309746
7S7309747
7S7309753
7S7309754
7S7309759
7S7309763
7S7309767
7S7309769
7S7309785
7S7309809
7S7309812
7S7309828
7S7309829
7S7309831
7S7309832
7S7309833
7S7309834
7S7309835
7S7309836
7S7309839
7S7309848
7S7309849
7S7309850
7S7309851
7S7309852
7S7309853
7S7309854
7S7309856
7S7309858
7S7309864
7S7309868
7S7309869
7S7309870
7S7309871
7S7309887
7S7309896
7S7309898
7S7309917
7S7309920
7S7309922
7S7309923
7S7309927
7S7309928
7S7309929
7S7309930
7S7309947
7S7309951
7S7310038
7S7310044
DRE7001455
DRS7001439
DRS7001440
DRS7001441
DRS7001442
DRS7001443
DRS7001444
DRS7001445
DRS7001446
DRS7001447
DRS7001448
DRS7001449
DRS7001450
Compliance
Only qualified CNG persons are authorized to perform this task. Refer to CGA 6.4 or NFPA 52 for
guidance on what training / experience is needed to be defined as “qualified”.
C. Labor Hours
The labor effort required by one qualified technician to accomplish the tasks in this Service Bulletin is
shown in Table 3.
Table 3. Labor Hours
TASK PERFORMED
CNG Solenoid Removal
Copyright 2024, The Heil Co.
LABOR HOURS PER UNIT
1.5 hours
Page 2 of 12
D. Tools, Materials and Parts Needed
The tools and parts necessary to perform the update are listed in Table 4.
Table 4. Tools and Materials
ITEM
Impact power tool
PART NUMBER
ADDITIONAL INFORMATION
Drive size compatible with socket sets
Standard hex tool set
Socket set
Standard hex tool set
Wrench set
Allen wrench tool set
Socket set preferred
Snoop
CNG leak test solution
Marking paste
Witness marking paste
4 – 5 ft. lbs.
Ladder
2.
Connector
108-8493-102
Connector, 2-way male
Tube
354-5917-005
1/2" Tube, Swagelok NFSET CNG
354-5250-002
1/2” to 1/2” Swagelok
Stauff clamp
036-1999-003
1/2” Stauff tube clamp
Flange nut
047-1727
1/4” 20 NC Threads
FSP070732
NC 1/4" x 2 1/4"
Bracket
113-7750-001
Solenoid valve mount bracket
PREPARING THE UNIT AND WORK AREA
It is necessary to prepare the truck to be serviced. Initial focus while preparing the truck is SAFETY.
Primary preparation for this task involves de-pressurizing the system (this does not include the CNG tanks)
BEFORE performing any maintenance procedures on the truck. This task does not involve any hot work
and the instructions outlined below are only applicable for the CNG solenoid removal.
DO NOT COMBINE ANY OTHER MAINTENANCE OR TASKS WITH THE INSTRUCTIONS BELOW,
DOING SO MAY REQUIRE ADDITIONAL STEPS OR INVOLVE DEFUELING COMPLETE CNG
SYSTEM, INCLUDING THE CNG TANKS!
Ensure that the unit is in Lock-Out/Tag-Out mode. Refer to and follow employer’s Lock-Out/Tag-Out
policies and procedures. At a minimum, refer to and follow the Lock-Out/Tag-Out procedure found in your
Heil Service Manual. Always wear appropriate Personal Protective Equipment as required by your
employer (at a minimum, safety glasses, goggles, and OSHA approved hard-toed boots are
recommended).
CAUTION: WHEN REPLACING CNG COMPONENTS, REPLACE WITH EQUAL OR HIGHER
PRESSURE RATED COMPONENTS.
Copyright 2024, The Heil Co.
Page 3 of 12
AFTER FOLLOWING THE DE-PRESSURIZATION PROCEDURE, PRESSURE WILL STILL REMAIN
INSIDE OF THE FUEL CYLINDER(S). USE CARE WHEN LOOSENING FITTINGS FOR THE FIRST
TIME. DO NOT OPEN ANY CYLINDER MANUAL SHUT-OFF VALVES AFTER ANY CNG FITTINGS,
CONNECTIONS, OR COMPONENTS ARE LOOSENED OR DISASSEMBLED.
NEVER WELD OR PERFORM ANY HOT WORK WITHIN 6 FT. OF ANY FUEL SYSTEM COMPONENTS
WITHOUT COMPLETELY DEFUELING THE COMPONENTS AND PURGING THEM. IN ADDITION TO
ABOVE INSTRUCTIONS, PROTECT FUEL SYSTEM COMPONENTS FROM HEAT DAMAGE BY
EITHER REMOVING THE COMPONENTS OR COVERING THE COMPONENTS WITH A WELDING
BLANKET OR OTHER APPROVED SHIELDING WHILE WORKING NEAR THE CNG FUEL SYSTEMS
OR COMPONENTS. IF WELDING IS REQUIRED BEYOND 6 FT. OF ANY FUEL SYSTEM
COMPONENTS, CHECK FOR GAS LEAKS AND ENSURE THAT THERE IS NO GAS PRESENT
BEFORE WELDING. WELDING CAN IGNITE THE FUEL RESULTING IN AN EXPLOSION OR FIRE,
CAUSING SERIOUS PERSONAL INJURY OR DEATH.
NEVER USE COMPRESSED AIR AS AN ALTERNATIVE TO INERT GAS WHEN PURGING CNG LINES
OR CNG FUEL SYSTEMS.
A. The area around the unit should be clear of all unnecessary equipment and personnel. It is strongly
recommended that the truck be quarantined from other units. Place barrier tape around the truck to
keep anyone from walking into or under moving parts.
B. Ensure the truck is parked on level ground and set to NEUTRAL.
C. APPLY the parking brake and ensure the parking brake works properly.
D. Chock wheels.
E. Turn the engine off.
Copyright 2024, The Heil Co.
Page 4 of 12
3.
CNG SOLENOID REMOVAL
With the unit prepared as described above, carefully proceed with the following steps in this section to
remove the CNG solenoid for units included in Section 1.A – Table 1 and Table 2.
A. Shut off all tanks. See Figure 1.
Figure 1
Copyright 2024, The Heil Co.
Page 5 of 12
B. Verify that the FMM Manual Shut-off Valve is in the ON position.
Figure 2
C. Start the engine and allow the engine to run until fuel pressure drops and the unit shuts off.
D. Verify the high-pressure gauge at the FMM box and body side gauge read zero. See Figure 3.
Figure 3
E. Shut off ignition
F. Shut off the battery.
Copyright 2024, The Heil Co.
Page 6 of 12
G. Slowly relieve residual / remaining pressure in the CNG lines / components by turning the bleed valve
cap on the FMM counterclockwise. See Figure 4.
Figure 4
H. After residual / remaining pressure have been relieved, close the bleed valve and torque it to 4-5 ft.
lbs. (48-60 in. lbs.)
I.
Slowly open the bleed / drain valve on Cummins
low pressure filter(s). Close the FMM door to start
the truck. Turn the ignition ON and crank the engine 2-3 times with the bleed / drain valve(s) open to
bleed trapped gas in the low-pressure line.
NOTE: IF THERE ARE TWO CUMMINS LOW-PRESSURE FILTERS ON THE CHASSIS, BLEED /
DRAIN BOTH FILTERS.
J.
Close the bleed / drain valve(s) on Cummins low-pressure filter(s).
NOTE: IF THERE ARE TWO CUMMINS LOW-PRESSURE FILTERS ON THE CHASSIS, CLOSE
THE VALVES ON BOTH FILTERS.
K. Ensure the high-pressure gauge and the low-pressure gauge in the FMM read 0 psi.
L. Turn the vehicle ignition switch OFF. Follow the vehicle manufacturer’s recommended vehicle lockout procedures. Remove the ignition key.
Copyright 2024, The Heil Co.
Page 7 of 12
M. Remove the body side CNG covers using a 7/32” wrench or bit. See Figure 5.
Figure 5
N. Remove the harness from the solenoid and cap it with connector 108-8493-102. See Figure 6.
Figure 6
108-8493-102
Copyright 2024, The Heil Co.
Page 8 of 12
O. Disconnect, remove, and discard the short tube above the solenoid valve.
P. Disconnect the lower tubing from the solenoid, then remove the solenoid from the bracket using a
10mm wrench.
Q. Place the replacement tube 354-5917-005, coupler 354-5250-002, and hand tighten.
R. Install bracket 113-7750-001 on the existing solenoid bracket with proper hardware shown in Figure 7.
Place the Stauff clamp 036-1999-003 on the 113-7750-001 bracket and line up the clamp with the
tubing. Minor adjustments to the bracket may be necessary to achieve alignment. Verify the clamp
does not interfere with Swagelok nut. See Figure 7.
Figure 7
113-7750-001
354-5917-005
354-5250-002
S. For all Swagelok fittings, tubes, and hoses, see Appendix A for installation procedure. Using this
procedure will tighten all fittings newly installed that were previously hand-tightened.
T. Open one tank slowly and allow CNG into the lines. Ensure the tank pressure gauge and the highpressure gauge on the FMM reads the same pressure.
NOTE: IF THE PRESSURE IS NOT EQUAL, ALLOW ENOUGH TIME FOR THE PRESSURE TO
EQUALIZE.
Copyright 2024, The Heil Co.
Page 9 of 12
U. Test for leaks by applying snoop. Once verified, apply witness paste. See Figure 8.
Figure 8
V. Open all remaining tanks.
W. See Figure 9 for final product reference.
Figure 9
Copyright 2024, The Heil Co.
Page 10 of 12
4.
APPENDIX A
A. Install the pre-swaged assembly into the fitting body. Hand-tighten the nut on the fitting body. See
Figure 10.
Figure 10
B. Mark the nut at the 6 o’clock position. See Figure 11.
Figure 11
Copyright 2024, The Heil Co.
Page 11 of 12
C. Hold the fitting body stable and tighten the nut 1/2 turn with a wrench. See Figure 12.
Figure 12
If you have any questions regarding the information detailed in this Bulletin, please contact Heil Technical
Service at 866-310-4345.
Heil Environmental Service Bulletin procedures are intended for use by professional technicians, NOT a “do-it-yourselfer.” They are
written to inform experienced technicians of conditions that may occur on some units, or to provide information that could assist in the
proper servicing of a unit. Properly trained technicians have access to and are familiar with the applicable Heil Operation Manual
and Heil Parts and Service Manuals and have the equipment, tools, safety training, and know-how to do a job properly and safely. If a
condition is described, DO NOT assume that the Bulletin instructions apply to your unit, or that your unit will have that condition. See
your Heil Dealer to determine whether your unit may benefit from the information in this Service Bulletin.
This entire bulletin (and any attachments) is confidential and only for the intended recipient(s). Use or distribution by any unintended
recipient is prohibited. If you have received this bulletin in error, delete this entire communication, and notify the sender you have done
so.
Copyright 2024, The Heil Co.
Page 12 of 12
- 💯【Conta.ct us for Support Directly】If you met any...
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW...
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS...
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full...
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE...
- 【TURN OFF CEL】 This AL319 car scanner diagnostic tool...
- 【EXTENSIVE APPLICATION】 Autel AL319 Compatible with...
- 【FOR END USER & DIYERS】 This error code reader AL319 is...
- 【USER-FRIENDLY DESIGN】 This OBD2 scanner and check...
- 【HIGH-QUALITY SERVICES】 12 months war.ranty from the...
Last update on 2026-06-12 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: SB-24-367
Replacement Service Bulletin Number:
MFR Communication Date: 2025-06-25
MFR Internal Campaign ID/Software Version: SB-24-367
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL/PROPULSION SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [2026 Top-Tier Hardware and Software Upgrade]: Topdon ArtiDiag900 Lite scanner has enhanced hardware and latest features, including Android 11.0, 5x faster CPU, 10000mAh battery for 12 hours of continuous operation, stable wireless diagnosis with Bluetooth 5.0, 8-inch touchscreen. Added bi-directional control, wireless diagnosis, battery testing (optional), and DTC repair guide
- [TOPDON Bidirectional Scan Tool]: This bidirectional obd2 scanner sends commands to the vehicle's ECU for active testing, enabling users to accurately and quickly locate faulty components such as injectors, coolant pumps, windows, wipers, headlights, mirrors, etc. The bidirectional control scanner is the ideal choice for workshops/automotive repair shops as it significantly reduces mechanic's diagnostic time.
- [Wireless Bluetooth Diagnostic Experience]: The AD900 Lite scan tool comes with a Bluetooth 5.0 VCI, supporting a wireless diagnostic range of up to 33 feet (10 meters), allowing you to diagnose without being confined to cables or tight spaces. Stable and fast wireless diagnosis provides a comfortable repair environment. It also offers VCI cables to increase connectivity options.
- [DTC Repair Guide Function]: Easily diagnose issues with your vehicle and receive guidance on repairs with the topdon scan tool's fault code definitions for all systems,maximize your diagnostic capabilities. This function is compatible with Chrysler
/Dodge/Jeep/Fiat 2010-2014 and expanding with continual updates,the AritDiag 900 Lite car diagnostic scanner is the must-have tool for any technician or DIY enthusiast. - [OE-Level Full System Diagnostics]:AritDiag900 Lite full system diagnostic scanner can scan ALL available modules(Engine, Transmission, Airbag, ABS, ESP, TPMS, Gateway, Steering, Radio, Air conditioning, ect.) to✔read ECU info, ✔read/clear codes, ✔view live data stream, ✔retrieves freeze-frame, ✔perform active tests, and more. With just a simple click, it provides you with accurate and in-depth diagnostics.
- Bi-Directional Control, Quickly Locate Problems: Turn your phone into a professional diagnostic tool. You can send commands from your phone to the ECU to test injectors, cooling fans, headlights, A/C clutch, windows, wipers, and more. See which one doesn't respond. Helps you quickly locate the problem and save time. No need to tear things apart, avoid blind disassembly.
- Flexible Subscription, Choose Advanced Features as Needed: TopScan Lite provides free-for-life access to core diagnostics, including full system scan, code reading, performance tests, and repair information. After purchase, advanced features (bi-directional control, service operations, live data, code clearing, and AI functions) are free-for-the-first-year. After the first year, if you want to use advanced features, you need to subscribe on a monthly, quarterly, or yearly basis. As new models and reset functions are updated, the tool will also be continuously upgraded.
- Full System Diagnostics, No Fault Hides: Unlike basic diagnostic tools that only cover 4 systems, TopScan can scan all systems. Read and clear trouble codes, view live data streams, and generate a complete vehicle health report – all issues are clear at a glance. Covers 10,000+ vehicle models and is compatible with 99.99% of vehicles.
- AI Assistant - TopFix: Think of TopFix as your personal AI mechanic. It leverages a repair database and OEM data to deliver clear, step-by-step repair solutions. Features include AI Q&A, one-click translation, and a full repair log, making your diagnostic process simpler and more efficient.
- 8+ Hot Resets, Keep Your Car in Top Shape: One-tap resets for oil, throttle, EPB, steering angle, DPF, ABS, BMS, and airbag. It enables car owners to easily perform essential maintenance, ensuring the vehicle stays in optimal condition and extends its service life.
- Dual WiFi & 10.1" Touchscreen: Provides a stable, high-speed wireless link 3x faster than bluetooth, and a responsive, professional interface. Topdon ONE obd2 scanner diagnostic tool ensures smooth, non-lagging diagnostic scan, boosting mechanic efficiency
- J2534 Pass-Thru Support: The included ONE VCI supports the J2534 standard, allowing it to function as a pass-thru device when paired with OEM diagnostic software.Through TOPDON’s RLink platform, technicians can perform dealer-level coding, expanding in-house capabilities without investing in multiple factory automotive scan tools
- OE Topology Mapping: Visualize the vehicle’s ECU network exactly as it’s built.Zoom, pan, and highlight specific modules to pinpoint component issues with precision.Topology mapping displays real-time communication between modules
- 50 Plus Service Functions: Covers high-demand services like ADAS calibration, DPF regen, TPMS reset, ABS bleed, and throttle adaptation.Expands your service menu, allows you to charge premium rates, and turns away zero jobs due to lack of tooling. Vehicle-specific functionality may vary
- Advaned ECU Coding: 10 of the most serviced brands in North America, including full ECU coding and flash hidden support for BMW, VW, Au-di, Benz, Porsche, Toyota, Ni ssan and more. Enables module replacement, feature customization, and personal settings with automatic backup or restore.Lets your shop safely offer high-margin customization services, attracting more customers and boosting profit
Last update on 2026-06-12 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.