Best Lift Axle Control Valve for Truck Air Systems

Best Lift Axle Control Valve

A strong lift axle control valve should match your axle system’s circuit and provide the right control style, ports, and installation setup for truck operators and maintenance teams. The Buyers Products 6451050 is a practical starting point when you need an assembled, pre-plumbed single-acting control with mounting hardware and tubing. This roundup also includes a toggle-valve assembly, manual 5-port replacement valves, a 12-volt control module for specific ACK250 kits, and controls intended for Hendrickson-type systems.

Those products are not interchangeable just because they serve lift axles. Check the existing part number, single- or double-acting circuit, port size, and system compatibility before ordering.

Use the comparisons below to narrow the field by application rather than choosing on product title alone.

The Buyers Products 6451050 Single-Acting Control is the best overall choice for a compatible single-acting lift axle or air-suspension setup. It arrives assembled and pre-plumbed, with a control assembly, mounting plate, and tubing included, helping reduce installation steps. Its 0.25-inch inlet and outlet connections are useful fitment checks before purchase.

Choose a different ranked option if your system needs a toggle valve, a double-acting circuit, a 5-port replacement, or a specific Hendrickson or ACK250 component.

Our Top Picks

Buyers Products 6451050Best Overall

Buyers Products 6451050

This single-acting assembly arrives pre-plumbed with tubing and a mounting plate, and its 0.25-inch inlet and outlet suit compatible systems.

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Buyers Products 6451051Best Toggle Control

Buyers Products 6451051

The assembled, pre-plumbed control uses a manual toggle air valve and includes tubing and a mounting plate for compatible lift axle systems.

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Ridewell 1230195 LACMBest ACK250 Replacement

Ridewell 1230195 LACM

This 12-volt automatic valve directly replaces the main control valve in Watson & Chalin ACK250-1 and ACK250-2 control kits.

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Compare Lift Axle Valve Options by Fit and Function

#ProductWeightdimensionsDimensionsBuy
12.1 lb8.13 x 7.5 x 6.88 in8.13 x 7.5 x 6.88 inView on Amazon
2
Buyers Products 64510512. Buyers Products 6451051Best Toggle Control
2.4 lb7.63 x 7 x 8 in7.63 x 7 x 8 inView on Amazon
3
Ridewell 1230195 LACM3. Ridewell 1230195 LACMBest ACK250 Replacement
———View on Amazon
4
HFQTZSSL 152000 Valve4. HFQTZSSL 152000 ValveBest 5-Port Replacement
0.41 kg——View on Amazon
5
ECOMARK EM-0336 Valve5. ECOMARK EM-0336 ValveManual rotary legacy replacement
—5.9 x 3.1 x 1.9 in5.9 x 3.1 x 1.9 inView on Amazon
6
Demfec 6451055 Assembly6. Demfec 6451055 AssemblyBest Double-Acting Assembly
—7 x 7 x 3.9 in7 x 7 x 3.9 inView on Amazon
7
YLQASOON 6451055 Assembly7. YLQASOON 6451055 Assembly6451055 double-acting replacement
2.1 lb——View on Amazon
8
Belgrade VS-31844-1 Kit8. Belgrade VS-31844-1 KitHendrickson OEM valve kit
—8 x 8 x 4 in8 x 8 x 4 inView on Amazon
9
Demfec 170HACSSI Control9. Demfec 170HACSSI ControlHendrickson-type HAC-SSI replacement
6 lb——View on Amazon
10
Automann 170.HACSSI Control10. Automann 170.HACSSI ControlHendrickson control replacement
4.16 lb——View on Amazon

Detailed Reviews: Best Lift Axle Control Valve

Buyers Products 6451050

#1 · Best Overall

1. Buyers Products 6451050

  • Weight: 2.1 lb
  • dimensions: 8.13 x 7.5 x 6.88 in
  • Dimensions: 8.13 x 7.5 x 6.88 in

Best for: Pre-plumbed single-acting control.

Why it ranks #1: This single-acting assembly arrives pre-plumbed with tubing and a mounting plate, and its 0.25-inch inlet and outlet suit compatible systems.

A pre-plumbed, assembled package gives this Buyers Products control its clearest advantage: truck upfitters get an in-cab push-pull valve, mounting plate, and tubing together for a compatible single-acting lift axle or air-suspension circuit. Its manual control raises and lowers the axle from the cab, while the compact assembly keeps the valve components coordinated.

The included mounting plate and tubing, along with the pre-plumbed assembly, can reduce separate component handling during installation. Inlet and outlet connections are both 0.25 inches, a useful specification when the vehicle circuit calls for that size. Its push-pull operation is specifically for single-acting applications, so identifying the circuit type before installation matters. The nylon assembly measures 8.13 by 7.5 by 6.88 inches, giving installers dimensions to consider when planning a mounting location.

Pros
  • Pre-plumbed and assembled control package
  • Includes mounting plate and tubing
  • In-cab push-pull raise/lower operation
  • 0.25-inch inlet and outlet connections
Cons
  • Limited to compatible single-acting applications; it is not specified for double-acting circuits.

Skip it if you need a double-acting valve or a different connection size; this assembly is specified for single-acting use with 0.25-inch ports.

For upfitters seeking a coordinated in-cab control package for a compatible single-acting axle, this Buyers assembly combines the valve, plate, and tubing. Check circuit type, port size, and available mounting space before choosing it.

Full product details
BrandBuyers Products Company
Included ComponentsControl Assembly, Mounting Plate, Tubing
Inlet Connection Size0.25 inches
Item Dimensions8.13 x 7.5 x 6.88 inches
Item Weight2.1 pounds
Dimensions8.13 x 7.5 x 6.88 inches
ManufacturerBuyers Products
Part Number6451050
MaterialNylon
Model Number6451050
Outlet Connection Size0.25 inches
Size8.13 x 7.5 x 6.88
Additional InformationImportant Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

Listed on Amazon as: Buyers Products 6451050 Single-Acting Lift Axle Control Assembly Kit

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Buyers Products 6451051

#2 · Best Toggle Control

2. Buyers Products 6451051

  • Weight: 2.4 lb
  • dimensions: 7.63 x 7 x 8 in
  • Dimensions: 7.63 x 7 x 8 in

Best for: Toggle-operated cab control.

Why it ranks #2: The assembled, pre-plumbed control uses a manual toggle air valve and includes tubing and a mounting plate for compatible lift axle systems.

A manual toggle air valve distinguishes the Buyers Products 6451051, giving drivers an in-cab way to raise or lower a lift axle in compatible air-suspension systems. The assembly arrives assembled and pre-plumbed with fittings and DOT tubing, while its included mounting plate provides a coordinated package for installation rather than a loose valve alone.

The toggle actuation offers a different cab control style from a push-pull valve, while the stated raise-and-lower function serves lift axle and air-suspension applications. Buyers supplies the assembly pre-plumbed with fittings and DOT tubing, which reduces the separate pneumatic connections an installer must assemble. Both inlet and outlet connections measure 0.25 inches, so the circuit must use compatible connections. The nylon assembly measures 7.63 by 7 by 8 inches; plan for that footprint at the mounting location.

Pros
  • Manual toggle air-valve actuation
  • Pre-assembled and pre-plumbed package
  • Includes fittings, DOT tubing, and mounting plate
  • 0.25-inch inlet and outlet connections
Cons
  • Its specified 0.25-inch connections limit use to compatible pneumatic circuits.

Skip it if you need a 0.375-inch double-acting push-pull assembly; Demfec's compatible 6451055 control lists 0.375-inch ports and double-acting operation.

Choose this Buyers Products assembly when a manual toggle and pre-plumbed cab-control package suit the truck’s lift axle circuit. Its 0.25-inch inlet and outlet connections make connection compatibility a key selection boundary.

Full product details
BrandBuyers Products Company
Included ComponentsControl Assembly, Mounting Plate, Tubing
Inlet Connection Size0.25 inches
Item Dimensions7.63 x 7 x 8 inches
Item Weight2.4 pounds
Dimensions7.63 x 7 x 8 inches
ManufacturerBuyers Products
Part Number6451051
MaterialNylon
Model Number6451051
Outlet Connection Size0.25 inches
SizeMedium
Thread Size0.25 inches
Additional InformationImportant Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Small parts. Not for children under 3 yrs.

Listed on Amazon as: Buyers Products 6451051 Lift Axle Control Assembly with Toggle Air Valve In-Cab Air Suspension Control Pre-Plumbed DOT Tubing Powder-Coated Mounting Plate for Raise Lower Lift Axle

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Ridewell 1230195 LACM

#3 · Best ACK250 Replacement

3. Ridewell 1230195 LACM

Best for: ACK250 cold-weather valve module.

Why it ranks #3: This 12-volt automatic valve directly replaces the main control valve in Watson & Chalin ACK250-1 and ACK250-2 control kits.

A brake-style relay with internal poppets is the key distinction of the Ridewell 1230195 lift axle control module, specified to resist sticking in moisture, unwanted material, and temperatures down to -40°F. Its 12V solenoid operation and direct replacement role in Watson & Chalin ACK250-1 and ACK250-2 kits target a specific repair need.

The internal brake-style poppets are described as resisting sticking in cold and contaminated conditions, addressing a relevant concern for lift axle operation in winter. Ridewell identifies the module as a direct replacement for the main control valve in ACK250-1 and ACK250-2 control kits, which helps narrow its application. The valve operates automatically and uses a 12V DC coil, so the vehicle’s electrical system and kit configuration must match. It also replaces listed Watson & Chalin and Norgren numbers.

Pros
  • Brake-style internal poppet relay
  • Specified for operation down to -40°F
  • 12V DC solenoid and automatic operation
  • Direct replacement for ACK250-1 and ACK250-2 main valves
Cons
  • The 12V DC coil requires a compatible electrical supply.

Skip it if you need a manual cab-operated valve rather than a 12V automatic module; ECOMARK EM-0336 is a manual rotary pneumatic switch.

Choose the Ridewell module when servicing a compatible ACK250 kit and seeking its specified 12V automatic, brake-style relay. Confirm the kit and electrical supply, particularly where the cold-weather operating specification matters.

Full product details
BrandRidewell Suspensions
Coil Voltage12 volts_of_direct_current
Included ComponentsValve
ManufacturerRidewell Suspensions
Minimum Switching Voltage12 volts_of_direct_current
Model1230195
Operation ModeAutomatic

Listed on Amazon as: Ridewell 1230195 LACM Lift Axle Control Valve | Replaces Watson & Chalin 19516-711 & Norgren 5040-711 | Hi-Flow Brake Style Relay | Fits ACK250 Lift Axle Kits | 12V Solenoid

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HFQTZSSL 152000 Valve

#4 · Best 5-Port Replacement

4. HFQTZSSL 152000 Valve

  • Weight: 0.41 kg

Best for: Legacy 152000 replacement valve.

Why it ranks #4: Its manual 5-port, 2-position design controls axle raising and lowering and lists several replacement numbers, including 110052 and 26A81X-0193.

A manual five-port, two-position valve makes this HFQTZSSL unit a direct replacement option for listed legacy lift axle valve numbers, including 152000 and 110052. Its switching controls airflow for axle raising and lowering in heavy-truck suspension applications, while the multiple stated replacement references help buyers identify whether it matches an existing system.

The five-port, two-position configuration specifies how the valve switches airflow, supporting manual lift and lower control in a truck suspension system. Its stated replacement references include 152000, 110052, E-SL152000, ESL152000, RSL152000, and 26A81X-0193, giving maintenance teams several numbers to compare with the existing valve. The supplied information lists truck compatibility and versatile mounting options, but does not specify connection dimensions or included components. Verify the system and mounting requirements against the existing installation before selecting it.

Pros
  • Manual five-port, two-position pneumatic valve
  • Controls airflow for raising and lowering
  • Lists several legacy replacement numbers
  • Specified for heavy-duty truck suspension applications
Cons
  • Connection dimensions and included installation components are not specified.

Skip it if you need a complete pre-plumbed cab assembly with tubing and mounting plate; Buyers Products 6451050 includes those components.

This valve suits maintenance buyers matching a listed legacy number on a heavy-truck lift axle system. Its five-port, two-position manual operation is clear, but connection dimensions and installation components require separate verification.

Full product details
BrandHFQTZSSL
Compatible with Vehicle TypeTruck
Included ComponentsNO
Item Weight0.41 kg
Load Capacity16 ounces
ManufacturerHFQTZSSL
Part Number20007
Manufacturer Warranty Description1 Year Manufacturer
Model Number152000

Listed on Amazon as: 152000 110052 Lift Axle Control Valve, 1/4" NPT, Heavy Truck Air Suspension

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ECOMARK EM-0336 Valve

#5

5. ECOMARK EM-0336 Valve

  • dimensions: 5.9 x 3.1 x 1.9 in
  • Dimensions: 5.9 x 3.1 x 1.9 in

Best for: Manual rotary legacy replacement.

Why it ranks #5: This manual 5-way, 2-position valve replaces 152000 and related numbers, with 0.25-inch inlet and outlet connections listed.

A manual ergonomic rotary knob distinguishes the ECOMARK EM-0336 five-way, two-position lift axle valve, giving operators a direct way to switch pneumatic airflow. It lists replacement references including 152000 and 110052, and specifies 0.25-inch connections. That combination gives fleet maintenance teams concrete identifiers for matching a legacy valve.

The five-way, two-position arrangement controls airflow for lift axle movement, while the manual rotary knob provides the operator interface. ECOMARK lists several replacement references, including 152000, 110052, E-SL152000, ESL152000, RSL152000, and 26A81X-0193, helping technicians compare an existing part. The 0.25-inch inlet and outlet connections and NPT thread specification are useful for checking pneumatic compatibility. Its 5.9-by-3.1-by-1.9-inch dimensions also help assess available space in the installation.

Pros
  • Manual rotary knob operation
  • Five-way, two-position pneumatic switching
  • Lists multiple legacy replacement numbers
  • 0.25-inch inlet and outlet with NPT thread specification
Cons
  • The 0.25-inch connections require a matching pneumatic setup.

Skip it if you need an assembled in-cab control package with tubing and a mounting plate; Buyers Products 6451051 includes those components.

The ECOMARK valve suits fleet technicians matching a listed legacy number and seeking manual rotary switching. Check its 0.25-inch NPT connections and compact dimensions against the vehicle’s plumbing and installation space.

Full product details
BrandECOMARK
Included ComponentsLift Axle Control Valve
Inlet Connection Size0.25 inches
Item Dimensions5.9 x 3.1 x 1.9 inches
Dimensions5.9 x 3.1 x 1.9 inches
ManufacturerECOMARK
Model NumberEM-0336
Outlet Connection Size0.25 inches
Thread SizeNpt

Listed on Amazon as: Lift Axle Control Valve 5-Way 2-Position Pneumatic Switch Replace 152000

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Demfec 6451055 Assembly

#6 · Best Double-Acting Assembly

6. Demfec 6451055 Assembly

  • dimensions: 7 x 7 x 3.9 in
  • Dimensions: 7 x 7 x 3.9 in

Best for: Double-acting push-pull replacement.

Why it ranks #6: The push-pull assembly is specified as double acting, with three 0.375-inch ports and brass push-lock fittings for compatible Buyers systems.

Double-acting manual push-pull operation sets this Demfec assembly apart for compatible Buyers 6451055 lift axle control applications. It provides in-cab raise-and-lower control for air suspension, with three ports and 0.375-inch port sizing. The brass construction and stated 300 PSI rated pressure add practical specifications for replacement selection.

The double-acting valve action and manual push-pull actuation identify how the operator controls raising and lowering from the cab, while the three-port layout defines the pneumatic connections. Brass push-lock fittings are specified with 0.375-inch ports, so installers can compare those details with the existing system before replacement. The assembly is listed as compatible with Buyers 6451055 and measures 7 by 7 by 3.9 inches. Its 300 PSI rating is a stated operating specification, not a substitute for checking circuit requirements.

Pros
  • Double-acting valve action
  • Manual in-cab push-pull control
  • Three 0.375-inch ports with brass push-lock fittings
  • Rated pressure listed as 300 PSI
Cons
  • The listed 0.375-inch ports require a compatible pneumatic circuit.

Skip it if you need a pre-plumbed single-acting control with 0.25-inch connections; Buyers Products 6451050 specifies that configuration.

Consider this Demfec replacement when a Buyers 6451055-compatible, double-acting push-pull control matches the existing setup. Check the three-port, 0.375-inch brass fitting arrangement and the assembly’s dimensions against the installation.

Full product details
BrandDemfec
Included ComponentsLift Axle Control Assy 6451055
Inlet Connection Size0.38 inches
Item Dimensions7 x 7 x 3.9 inches
Dimensions7 x 7 x 3.9 inches
ManufacturerDemfec
MaterialBrass
Model Number6451055
Outlet Connection Size0.38 inches
Size188.7 cubic inches
Thread Size0.375 inches

Listed on Amazon as: Lift Axle Control Assy Compatible with Buyers 6451055 Lift Axle Control Panel Push-Pull Air Valve Double Acting

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YLQASOON 6451055 Assembly

#7

7. YLQASOON 6451055 Assembly

  • Weight: 2.1 lb

Best for: 6451055 double-acting replacement.

Why it ranks #7: This 6451055-compatible push-pull assembly is listed for double-acting raise-and-lower applications, with three ports sized at 0.375 inches.

A 6451055 replacement reference makes this YLQASOON control a targeted option for Buyers-compatible lift axle panels using double-acting push-pull operation. Its three ports are listed at 0.375 inches, and the stated application is raising and lowering an axle in an air-suspension system, giving buyers key details for a compatibility check.

The stated compatibility with a Buyers 6451055 panel points buyers toward a specific replacement application rather than a universal valve. Double-acting push-pull operation handles lift axle raising and lowering, while the three-port, 0.375-inch specification helps technicians compare the pneumatic layout with the existing assembly. The listing includes the lift axle control assembly and gives its weight as 2.1 pounds. Confirming the part reference, port arrangement, and circuit type before installation helps avoid choosing a control with a mismatched configuration.

Pros
  • Replacement reference for 6451055
  • Specified for Buyers-compatible lift axle panels
  • Double-acting push-pull raise/lower application
  • Three ports sized 0.375 inches
Cons
  • The listed application is limited to compatible 6451055 double-acting systems.

Skip it if you need a cold-weather automatic 12V relay for an ACK250 kit; Ridewell 1230195 is specified for that module application.

This YLQASOON assembly is for buyers matching a 6451055-compatible double-acting panel and its three-port, 0.375-inch layout. Check those details against the current control before choosing it for an air-suspension repair.

Full product details
BrandYLQASOON
ColorBlack
Included ComponentsLift Axle Control Assy
Item Weight2.1 pounds
ManufacturerYLQASOON
Model6451055
Warranty Description180 Days

Listed on Amazon as: 6451055 Lift Axle Control Assy Compatible with Buyers Lift Axle Control Panel Push-Pull Air Valve Double Acting

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Belgrade VS-31844-1 Kit

#8

8. Belgrade VS-31844-1 Kit

  • dimensions: 8 x 8 x 4 in
  • Dimensions: 8 x 8 x 4 in

Best for: Hendrickson OEM valve kit.

Why it ranks #8: The Hendrickson genuine OEM kit replaces A100046300 and operates with the park control valve, making it a targeted replacement option.

Hendrickson genuine OEM identification is the defining point of the Belgrade VS-31844-1 lift axle control valve kit, which replaces A100046300. The kit operates with the park control valve and is specified for select commercial vehicles, giving buyers an application reference alongside its alloy-steel construction and stated harsh-condition intent.

The stated relationship with the park control valve is important to its pneumatic workflow: the kit operates in conjunction with that control rather than being described as a standalone universal valve. Its replacement reference, A100046300, provides a concrete number to compare during service selection. Alloy-steel construction and the stated intent to withstand harsh operating conditions suit commercial-vehicle service considerations. The listed dimensions are 8 by 8 by 4 inches; check the vehicle application and installation space before selecting this kit.

Pros
  • Hendrickson genuine OEM kit identification
  • Replaces A100046300
  • Operates in conjunction with the park control valve
  • Alloy-steel construction
Cons
  • Specified for select commercial vehicles rather than universal application.

Skip it if you need a manual 0.25-inch five-way valve with legacy replacement numbers; ECOMARK EM-0336 lists those specifications.

This Belgrade kit suits buyers matching Hendrickson VS-31844-1 or replacement reference A100046300 on a select commercial vehicle. Its park-control relationship makes confirming the vehicle application particularly important.

Full product details
BrandBelgrade
Item Dimensions8 x 8 x 4 inches
Dimensions8 x 8 x 4 inches
ManufacturerHendrickson
MaterialAlloy Steel
Model NumberVS-31844-1

Listed on Amazon as: Belgrade Parts & Service, Inc. Hendrickson Genuine OEM # VS-31844-1 Lift Axle Control Valve Kit Replaces A100046300.

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Demfec 170HACSSI Control

#9

9. Demfec 170HACSSI Control

  • Weight: 6 lb

Best for: Hendrickson-type HAC-SSI replacement.

Why it ranks #9: This control is identified for Hendrickson-type HAC-SSI systems; its listing advises confirming the OEM part number and system type before purchase.

Compatibility with Hendrickson-type HAC-SSI systems is the defining feature of this Demfec lift axle control. Its listed model is 170HACSSI, and the product identifies color-coded lines for lift springs, ride springs, and supply air tank connections. Those details can help maintenance teams assess whether this control matches their system and pneumatic routing.

The HAC-SSI and HACSSI compatibility references narrow the intended application to Hendrickson-type lift axle control systems, so comparing the system designation is central to selection. Demfec identifies blue for lift springs, red for ride springs, and green for the supply air tank, providing routing information for installation work. The listed dimensions are 7.9 by 7.9 by 6.7 inches and weight is 6 pounds, useful for planning handling and mounting. The listing advises confirming the OEM number and system type.

Pros
  • Specified for Hendrickson-type HAC-SSI systems
  • Model identified as 170HACSSI
  • Lists color-coded spring and supply-air lines
  • Dimensions provided for installation planning
Cons
  • The listing limits compatibility to Hendrickson-type HAC-SSI systems.

Skip it if you need a general manual five-port valve with listed legacy numbers; HFQTZSSL 152000 lists several replacement references and truck use.

This Demfec control is for buyers servicing a Hendrickson-type HAC-SSI installation, especially when the listed line colors help identify routing. Confirm the OEM number and system type, and account for its stated dimensions.

Full product details
BrandDemfec
Item Weight‎6 pounds
Item model number‎170HACSSI Lift Axle Control
Manufacturer‎Demfec
Part Number‎170HACSSI
Model‎170HACSSI Lift Axle Control
Dimensions‎7.9 x 7.9 x 6.7 inches

Listed on Amazon as: Lift Axle Control Compatible with Hendrickson Type Systems HAC-SSI

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Automann 170.HACSSI Control

#10

10. Automann 170.HACSSI Control

  • Weight: 4.16 lb

Best for: Hendrickson control replacement.

Why it ranks #10: The listing identifies this as a Hendrickson lift axle control, but provides less fitment and connection detail than the other options.

The Automann 170.HACSSI is identified specifically as a Hendrickson lift axle control, making its application designation the main selection clue. Its product information supplies a model-style part reference and package dimensions, which help maintenance teams compare the replacement with an existing control and plan handling or storage before installation.

Automann names the 170.HACSSI control for Hendrickson, so the stated application provides a focused starting point for replacement selection. The package measures 11.61 by 10.47 by 3.62 inches, useful when checking storage or handling space before a service job. Its listed weight is 4.16 pounds. The supplied information does not describe valve actuation, port sizes, or included fittings, so buyers should compare those requirements with the existing system rather than assume a particular pneumatic configuration.

Pros
  • Identified for Hendrickson lift axle control
  • Automann 170.HACSSI model reference
  • Package dimensions supplied
  • Package weight listed as 4.16 pounds
Cons
  • Valve actuation, port sizes, and included fittings are not specified.

Skip it if you need listed port dimensions and five-port manual switching; ECOMARK EM-0336 specifies a five-way, two-position valve with 0.25-inch connections.

This Automann listing may suit a buyer matching the 170.HACSSI Hendrickson control designation. Because port and actuation details are not supplied, compare the existing valve’s configuration before planning installation.

Full product details
BrandAutomann
Item Weight‎4.16 pounds
Manufacturer‎AUTOMANN
Part Number‎170.HACSSI
Package Dimensions‎11.61 x 10.47 x 3.62 inches

Listed on Amazon as: Automann 170.HACSSI Lift Axle Control, for Hendrickson

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Avoiding circuit and replacement-number mismatches

A matching part number and circuit type matter more than the shared lift-axle label. The 6451050 is described for a compatible single-acting application, while the Demfec 6451055 assembly is explicitly double acting and lists three 0.375-inch ports. They are not substitutes based on appearance or purpose alone.

The 152000-style valves list replacement numbers such as 110052 and 26A81X-0193, while the Ridewell 1230195 is tied to Watson & Chalin ACK250-1 and ACK250-2 kits. Hendrickson-type controls also require their own fitment check: the HAC-SSI listing asks buyers to verify the OEM number and system type.

Before ordering, compare the old valve’s markings, the vehicle or kit documentation, and the air-line layout with the replacement listing. If any of those disagree, confirm compatibility with the system supplier rather than assuming an adapter will solve it.

What a stuck lift axle valve can mean

A lift axle that does not raise or lower can point to a valve problem, but these listings do not establish that the valve is the only possible cause. The Ridewell 1230195 description specifically presents its relay design as an alternative to spool valves that may stick in cold weather; its listed 12-volt DC coil and ACK250-kit compatibility make it a targeted option, not a universal cure. Other products here are manual controls, including the Buyers push-pull or toggle assemblies and the 5-port replacement valves.

Before replacing a component, confirm whether the existing control is manual or automatic, inspect its wiring if it uses a solenoid, and verify the air supply and plumbing against the system layout. This distinction can prevent selecting a manual valve for an electrically operated setup, or an automatic module where a cab-operated assembly is required.

How to Choose a Lift Axle Control Valve

Circuit and control action

Choose a valve whose action matches the existing lift axle circuit and operator control. The Buyers Products 6451050 is specified for single-acting applications, and the 6451051 uses a manual toggle valve; the Demfec 6451055 is explicitly double acting with manual push-pull actuation. By contrast, the Ridewell 1230195 is an automatic module with a 12-volt DC coil.

Buyers seeking a straightforward in-cab manual control for a compatible single-acting system should start with the Buyers assemblies. Those replacing an ACK250 control module should look at the Ridewell unit, while buyers of double-acting systems should verify the Demfec 6451055 fitment before considering it.

Port size and connection layout

Match the replacement’s port size and layout to the air lines and fittings already installed. The Buyers 6451050 and 6451051 list 0.25-inch inlet and outlet connections, and the ECOMARK valve also lists 0.25-inch connections. The Demfec 6451055 has three 0.375-inch ports and brass push-lock fittings.

These sizes are meaningfully different, so do not assume a valve will connect directly because its control function sounds similar. Buyers replacing a quarter-inch connection setup can focus on the 0.25-inch options; those with a three-port, 0.375-inch double-acting arrangement should investigate the 6451055 listing.

Confirm the connection standard and actual installed plumbing before ordering, since the listings do not provide enough information to establish universal interchangeability.

System fit and included installation parts

Use the existing system’s part number and installation needs to narrow your options. Buyers Products 6451050 and 6451051 include a control assembly, mounting plate, and tubing, and both are described as pre-plumbed. The HFQTZSSL and ECOMARK valves instead list replacement numbers associated with the 152000 family.

Ridewell specifies Watson & Chalin ACK250-1 and ACK250-2 kits, while the Demfec HAC-SSI listing calls for checking the OEM number and system type. Buyers replacing a complete cab control may favour the assembled Buyers kits; those replacing only a matching valve can consider the corresponding number-specific unit.

Confirm whether mounting hardware, tubing, or fittings are needed, since included components vary across these products.

Which Lift Axle Control Valve Should You Choose?

For a compatible single-acting setup where you want a complete, pre-plumbed cab control, choose Buyers Products If you prefer a toggle control and your system matches its specifications, Buyers Products 6451051 is the alternative. For Watson & Chalin ACK250-1 or ACK250-2 kits, select Ridewell 1230195 LACM, whose listed fitment and 12-volt coil distinguish it from manual controls.

Buyers replacing a 152000-family valve can compare HFQTZSSL 152000 Valve and ECOMARK EM-0336 Valve against the old part number and connection layout. For a confirmed double-acting, three-port setup, investigate Demfec 6451055 Assembly or YLQASOON 6451055 Assembly.

Choose the Hendrickson-specific options only after verifying the system and OEM number.

Frequently Asked Questions

How can I identify whether my lift axle system is single-acting or double-acting?

Check the existing valve, air-line routing, and vehicle documentation to identify how the axle is operated. A single-acting system uses a different control arrangement from a double-acting circuit, so do not rely on appearance alone. If the circuit type is unclear, confirm it with the vehicle or axle documentation before choosing a valve.

Which lift axle control valve is compatible with my truck’s existing part number and air circuit?

Match the old valve’s part number and connection layout, then confirm the circuit type and any specified system fitment. The listed options include 152000-family replacements, double-acting assemblies, Hendrickson-specific controls, and an ACK250-compatible control. A matching product title is not enough by itself; verify the truck’s existing part number and air circuit.

What should I check when diagnosing a lift axle valve that will not raise or lower the axle?

Start by checking the air supply, tubing connections, and control operation, then look for visible damage or loose connections. Confirm that the valve and circuit match the system’s single- or double-acting design. If those checks do not identify the issue, consult the vehicle or axle service information before replacing components.

When should I choose a solenoid control instead of a manual control?

Choose based on the system’s specified control arrangement and component fitment. The Ridewell 1230195 LACM is listed for Watson & Chalin ACK250-1 or ACK250-2 kits and has a 12-volt coil, while other listed options are manual controls. Verify the existing part number and circuit before selecting either type.

What details should I verify before ordering a replacement valve?

Compare the existing part number, air-circuit type, connection layout, and any stated system-specific fitment with the replacement listing. For the Buyers Products 6451050, check the 0.25-inch inlet and outlet connections. Confirming these details first helps distinguish it from toggle, double-acting, five-port, or OEM-specific alternatives.

Final Words

Start with the existing part number, air-circuit type, connection layout, and any system-specific fitment. For a compatible single-acting setup needing a pre-plumbed cab control, the Buyers Products 6451050 is the overall choice. Consider the toggle alternative, ACK250 control, 152000-family replacements, or double-acting assemblies only when their stated fit matches your system.

Verify Hendrickson-specific options against the system and OEM number before ordering.

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