Hadley / Link Suspensions

Hadley Height Control Systems are the choice of vehicle manufacturers and fleets because of their proven performance. Whether it’s our 450, 500 or 600 series of classic valves, or our next generation height control valves you will enjoy significant benefits.
Hadley height control valves are engineered to be the most reliable valves on the road. Counterfeit valves are not built to the same standards, do not meet the same specifications, and do not perform as well or last as long as a genuine Hadley valve.
Genuine Hadley Means Superior Performance
- Superior lubricants with proven and consistent lubrication to protect the valve
- Proven O-ring seal integrity throughout the life of the valve
- Counterfeit valves require frequent replacement due to excessive wear and tear
- Hadley leveling valves are designed with 37 years of leveling valve technology
- Chosen by OEMs more often than any other valve brand
- Engineered to outlast all other leveling valves
- Made in the USA
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Adjustable Linkage Kit - HPB450-3
Part #: K863006
$36.00$18.00Adjustable Linkage Kit - HPB450-3
Adjustable Linkage Kit - HPB450-3
DACP P/N K863006 (20") Adjustable Link Kit
Hadley P/N HPB450-3
Kit include...
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Adjustable Linkage Kit - H00460
Part #: K863007
$35.00$21.00Adjustable Linkage Kit - H00460
Adjustable Linkage Kit - H00460
DACP P/N K863007 (8-1/2” - 14-7/8") Adjustable Link Kit
Hadley P/N H00460
Kit includes: both ends are fix...
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Height Control Valve - H00450CE
Part #: K863001
$151.00$98.00Height Control Valve - H00450CE
Height Control Valve - H00450CE
DACP P/N K863001 HCV Kit
Hadley P/N H00450CE
Includes: Integral Check Valve, (2) Levers, (2) Mounting Bra...
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Height Control Valve - H00500C
Part #: K863002
$180.00$117.00Height Control Valve - H00500C
Height Control Valve - H00500C
DACP P/N K863002 HCV Kit with Integral (N/O) Dump (apply pressure to dump)
Hadley P/N H00500C
Includes: (3) Lever Arms and (2) Mounting ...
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Height Control Valve - H00500DC
Part #: K863004
$240.00$135.00Height Control Valve - H00500DC
Height Control Valve - H00500DC
DACP P/N K863004 HCV Kit with Integral Pressure (N/O) Dump (apply pressure to dump).
Hadley P/N H00500DC
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Height Control Valve - H00600P
Part #: K863005
$124.00$85.00Height Control Valve - H00600P
Height Control Valve - H00600P
DACP P/N K863005 HCV Kit with 14" Adjustable Linkage. Compact and Light weight valve.
Hadley H00600P
Height Control Valve - H01500UN
Part #: K863008
$156.00$96.00Height Control Valve - H01500UN
Height Control Valve - H01501PUD
Part #: K863009
$160.00$102.00Height Control Valve - H01501PUD
Height Control Valve - H01501PUD
DACP P/N K863009 Next Gen Universal HCV Kit with Integral (N/O) Dump (apply pressure to dump).
Hadley P/N H01501PUD
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Height Control Valve - H01501UD
Part #: K863010
$184.00$103.00Height Control Valve - H01501UD
Height Control Valve - H01501UD
DACP P/N K863010 Next Gen Universal HCV Kit with Integral (N/O) Dump (apply pressure to dump).
Hadley P/N H01501UD
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Height Control Valve - H01502UNC
Part #: K863011
$239.00$96.00Height Control Valve - H01502UNC
Height Control Valve - H01502UNC
DACP P/N K863011 Next Gen Universal HCV with Integral (N/C) Dump (release pressure to dump).
Hadley P/N H01502UNC
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Height Control Valve - H00500FS
Part #: K863012
$218.00$117.00Height Control Valve - H00500FS
Height Control Valve - H00500FS
DACP P/N K863012 Height Control Valve Kit with Integral N/O Dump (apply pressure to dump) with 20" Adjustable Linkage Kit, Special mounting Brackets and Hardware for Freigh...
Height Control Valve - H00500CF
Part #: K863015
$242.00$132.00Height Control Valve - H00500CF
Height Control Valve - H00500CF
DACP P/N K863015 HCV Kit with Integral N/O Dump (apply pressure to dump) with 20" Adjustable Linkage and special mounting Brackets and Hardware for Mack.
Height Control Valve - H00650UL
Part #: K863024
$151.00$85.00Height Control Valve - H00650UL
Adjustable Link Bolts - HPB450-Bolt
Part #: K863014
$37.00$16.00Adjustable Link Bolts - HPB450-Bolt
Adjustable Link Bolts - HPB450-Bolt
Hadley Link Shoulder Bolts for Hadley Adjustable Linkage.
Note: Use only with HPB450 Adjustable Linkage
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Height Control Valve -H00500CA
Part #: K863003
$249.00$162.00Height Control Valve -H00500CA
Height Control Valve -H00500CA
DACP P/N K863003 HCV Kit with Integral Dump & N/C Reverse Actuation Valve (release pressure to dump).
Hadley P/N H00500CA
Height Control Valve - H00650LD
Part #: K863026
$91.00$55.00Height Control Valve - H00650LD
Rotary Sensor - H15903-C7A
Part #: K863025
$241.00$147.00Rotary Sensor - H15903-C7A
Reverse Actuation Valve kit - HPB500D
Part #: K863023
$104.00$54.00Reverse Actuation Valve kit - HPB500D
Reverse Actuation Valve kit - HPB500D
DACP P/N K863023 N/C Reverse Actuation Valve (release pressure to dump).
Link Suspension / Hadley P/N HPB500D
Adjustable Linkage Kit - HPB450-43
Part #: SKU 863027
$33.00$17.00Adjustable Linkage Kit - HPB450-43
Adjustable Linkage Kit - HPB450-43
DACP P/N K863027 (14") Adjustable Link Kit
Link Suspension / Hadley P/N HPB450-3
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