Description
276566-G – PUSH/PULL VALVE (1)
PART NUMBER(S):
Fleet Products: 276566-G
OE: 276566, KN20021, OR276566
Automann: 170.276566
DESCRIPTION:
Model: PP-1 Push/Pull Valve
Vehicles: Compatible with most heavy-duty trucks and trailers with air brake systems
• Valve Type: Push-pull, manually operated, on/off air control with automatic exhaust
• Supply Port: 1 × 1/8"-27 NPT
• Delivery Ports: 2 × 1/8"-27 NPT
• Exhaust Port: 1 × 1/8"-27 NPT
• Mounting: 7/8"-20 UNEF-2A thread
• Automatic Release Pressure: 20 PSI
• Actuation: Manual with spring-return to exhaust at low pressure
• Plunger/Button Height: 1.16"
• Plunger Diameter: 0.374"
• Operating Temperature Range: -40°F to 200°F (-40°C to 93°C)
• Weight: Approx. 0.6 lbs (0.27 kg)
• Function: Controls spring brakes (parking and emergency) in tractor/trailer applications; shifts to exhaust when system pressure drops below release threshold
• System Integrity: Dash-mounted, direct OE replacement for single-circuit tractor air systems using TP-2 protection valves
• Repair/Maintenance Kit: BEN281126N (sold separately)
Applications:
Used as a manual control valve on vehicle dashboards to engage or release parking/emergency brakes in heavy-duty air brake systems. Automatically exhausts delivery air below 20 PSI. Compatible with pre-FMVSS 121 single-circuit tractor air brake systems or as a replacement in modern configurations.
CROSS-REFERENCE(S):
276566, 175276566, 00716276566, 276566RX, KN20021, RB-276566, T-A-276566, OR276566, 277556, 276566N, 276566X, PP-1, 281126N, 1113099, GTA-276566, EBN276566N, 12403, WA276566, 14027, 277015, 278450R955276566, RKN20001, 275175, 276570, 276580, 277072, 277090, 289034, 92100200886, C3TS2A224A, 2445920, N20960, N20021, 20QE3113, 20QE3179, 745-276580, 750-1180500, 401134, 034013, BEN276566N, BX276566, BX276566N, BAN276566N, BW276566, BW276566N, AV276566, TWDBEN276566N, V1113099, ACA-05765700A cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.
IMPORTANT INSTALLATION NOTES:
✔ Install using the provided 7/8"-20 panel nut for proper dashboard mounting
✔ Air lines must be connected according to markings made during removal
✔ Button, dial, mounting nut, and rubber boot are not included—reuse OEM or source separately
✔ Ensure supply pressure is above 20 PSI to prevent automatic exhaust activation
✔ Secure button with roll pin after mounting to prevent unintentional release
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