Description
KN34070-G - TRACTOR PROTECTION VALVE
PART NUMBER(S):
Fleet Products: KN34070-G | Replaces OE: Haldex: KN34000, KN34030, KN34040, KN34040A, KN34070, KN34070N, KN34070X | Automann: 170.KN34070 | Meritor: RKN34070, R955KN34070N | Bendix: 227661, 227801, 276161, 227672, 227801, 276160
DESCRIPTION:
Model: Three-Line Automatic Tractor Protection Valve Without Quick Release
Vehicles: Heavy-duty tractors using compatible PP-7 or MV-3 dash-control valves
• Valve Type: Pneumatically actuated three-line automatic tractor protection valve
• No. of Ports: 5
• Tractor Control Port: One 3/8" NPT
• Trailer Service Port: One 1/2" NPT
• Trailer Emergency Port: One 1/2" NPT
• Reservoir Port: One 3/8" NPT
• Dash Valve Port: One 1/4" NPT
• Service Line Opening Pressure: Approximately 45 PSI
• Shut-Off Pressure: 20 PSI ± 5 PSI
• Operating Temperature Range: -40°F to 200°F (-40°C to 93°C)
• Mounting: Behind-cab or tractor chassis-rail installation
• Function: Isolates the trailer circuits if a trailer line fails or becomes disconnected
• Quick-Release Function: Not included
• Dash Valve Compatibility: PP-7 or MV-3 style controls
Applications:
Designed for tractor air brake systems requiring automatic isolation of the trailer service and emergency circuits during trailer disconnection or air-line failure. It is typically replaced when the valve leaks, fails to protect tractor reservoir pressure, or does not open and close at the specified operating pressures.
CROSS-REFERENCE(S):
170.KN31070OE, KN31070, 032060, 217380, E-4327, E4327, 90054077, N30300, R955KN34070X, 227661X, 8235R955KN34070X, R955KN34070XRI, TDAR955KN34070X, 10080G, 10130260, 1017506, 138962, 14109F, 14109FX, 16090, 176825R91, 176826R91, 180217, 184970, 20014, 20QE19018, 20QE335, 20QE355, 206200, 211205H1, 218869R91, 227661, 227662, 227672, 227801, 227932, 228276, 25E0645, 276160, 276161, 283090, 3212393R91, 3213493R91, 323780, 355439C91, 355439C92, 360423C91, 360423C92, 36Z950D1, 408431C91, 445177R91, 445177R92, 479191C91, 481587, 53700, 633354, 633418, 680502R91, 681698R91, 70180217, 7650G, 77S812, 788990C91, 7B6186, 865755R91, 865755R92, 866748R91, 866784R92, 87427R92, 874727R91, 875691R91, 875691R92, 875891R91, 98005598, 997072R91, 997072R92, 18A2146, A15207, A24316, AC24912-001, B9Q2951A, CTYCB18718A, G45431, MBW004249, N20952B, N30033D, N30033G, N30073DA, N30073GC, N30073GD, SV8047, TYCB22525A, XC332865, Y633354
A cross-reference listing means this part may be a suitable replacement for the listed part numbers. Always verify fitment before installation.
IMPORTANT INSTALLATION NOTES:
✔ Confirm the system requires a three-line tractor protection valve without quick release.
✔ Identify and connect all five ports according to the tractor air-system diagram.
✔ Verify compatibility with the existing PP-7 or MV-3 dash-control valve.
✔ Mount behind the cab or on the chassis rail in the approved orientation.
✔ Leak-test the system and verify trailer isolation and tractor pressure protection after installation.
Warranty Information
