Description
277148-G - PR-2 PRESSURE PROTECTION VALVE - 85 PSI
PART NUMBER(S):
Fleet Products: 277148-G | Replaces OE: Bendix: 277148 | Automann: 170.277148 | Navistar: 1612-393-C | Mack: 745-277148N | Meritor: R955277148N | Euclid: E-BN277148N | Caterpillar: M4X-7499 | Tectran: 14549, 401287
DESCRIPTION:
Model: Bendix PR-2 Adjustable Pressure Protection Valve
Vehicles: Heavy-duty trucks, trailers, buses, and vocational vehicles using compatible auxiliary air circuits
• Valve Type: Normally closed pressure protection valve
• Supply Port: One 1/4"-18 NPT
• Delivery Port: One 1/4"-18 NPT
• Pressure Setting: 85 PSI ±5 PSI
• Adjustment: Adjustable pressure threshold
• Mounting Holes: Two approximately 0.27" holes
• Hole Spacing: 1.25" center-to-center
• Operating Temperature: -40°F to 200°F (-40°C to 93°C)
• Actuation: Pneumatic and pressure-sensitive
• Installation: Inline between primary and secondary reservoirs
• Function: Delays auxiliary airflow until minimum pressure is reached
Applications:
Designed to protect the primary air brake system by withholding air from a secondary reservoir or auxiliary circuit until supply pressure reaches approximately 85 PSI. This supports controlled reservoir filling and helps preserve pressure for essential braking functions during system startup or pressure loss.
CROSS-REFERENCE(S):
277148N, 277148P, 277148RX, 277148BXR, BEN-277148, BER-277148, BW 277148N, BW277148, BW277148N, BX277148, OR277148X, 745-277148N, 4K-22-4, BAN277148, BAR277148, ZAC277148, BD822GRP, R955277148X, TDAR955277148, S-D822, SD822, TV277148, WA277148, 2951172, A2231383, 728073401, 872256A, 350173, 1034763, 2067142, 25053400002, DOHZ2A435A, D0HZ2A435A, K2951172, K295-117-2, AE763404, 763404, 36Z1144D1, KN31010, MBW277148, 1231, 11383, 3052964, 34628, 34675, 7926000487, 9234287, 10130563, 101232004, E4039616, 1520900, 283933, 283489, 283038, 49900037A1, 060-277148N, 2Z5113, 4L-22-256, 4L22256, 13AV4421, 25AB0137A, 25AB2137A, VTC-822D, P7602-D
A cross-reference listing means this part may be a suitable replacement for the listed part numbers. Always verify fitment and pressure setting before installation.
IMPORTANT INSTALLATION NOTES:
✔ Confirm the application requires an 85 PSI pressure protection setting.
✔ Verify the 1/4"-18 NPT supply and delivery port routing.
✔ Confirm the two-hole mounting pattern and 1.25" center spacing.
✔ Install inline in the correct airflow direction between the air circuits.
✔ Pressurize the system and verify opening pressure, closing response, and leak-free operation.
Warranty Information
