Seller: truckliner_parts ✉️ (7,868) 99.8%, Location: Decatur, Indiana, US, Ships to: US & many other countries, Item: 276124432171 Bendix PP7 Trailer Air Supply Valve Assembly - P/N: WWS 79101-3404. Bendix PP7 Trailer Air Supply Valve Assembly - P/N: WWS 79101-3404 Bendix PP7 Trailer Air Supply Valve Assembly - P/N: WWS 79101-3404 Bendix PP7 Trailer Air Supply Valve Assembly Valve ASSY PP7 TRLR SPLY P/N: WWS 79101-3404 Superseded By P/N: BW 288721N Trailer Override Pressure: 20 to 32 psi Automatic Release Pressure: 40 psi Supply & Control Port Thread Size: 1/8-27 NPT in Mounting Thread Size: 7/8-20 UNEF-2A in Delivery Port 1 Thread Size: 1/4-18 NPT in Weight: 1.15 lb. Exhaust Port Type: Open Overall Length: Approx. 4.77" Overall Width: Approx. 2.12" Overall Height: Approx. 2.05" Plunger Height: Approx. 1.14" Plunger Diameter: Approx. 0.37" Operating Temperature: -40 °F to 200 °F May Have Cosmetic Blemishes See Photos For More Details The Bendix PP7 Trailer Air Supply Valve Assembly offers superior air system control with its pressure rating of 225 PSI, ensuring reliable performance. This durable valve assembly comes with a corrosion-resistant zinc body for increased longevity and P/N: WWS 79101-3404 compatibility. Just a Reminder: We do not have the means to cross-reference VINs; therefore, for part fit specifications, please contact your local dealer. Be sure to check out the rest of our store. We have a huge selection of discounted new and used truck parts. Shipping and Handling: All of our items have 1 (one) day handling time (Unless it is the weekend or a holiday). Ground shipments will be sent via UPS or USPS. Freight shipments will be sent via ESTES or XPO. We do offer faster shipping for an extra cost (Please contact us for faster shipments). Tracking numbers will be put into the listing after your item has been shipped. Payment: We accept Paypal as well as eBay payment options. Sales Tax will be charged to Indiana and whomever eBay requires to tax. We will accept credit cards, cash, and other payment options for local pickups. Returns: We accept returns up to 30 days after the item has been delivered to you (If it has been longer than 30 days a 15% restocking fee will be charged to returns or not accepted). Full money back on all returns as long as they come back in the condition they were sent. Buyer is to pay for return shipping unless we shipped you the incorrect item or if the item has been damaged through the shipment process. International Shipments: At this time we do not ship Internationally. FREE SHIPPING Fast and Free With Tracking Number!! Listing and template services provided by inkFrog - Condition: New other (see details)
- Brand: Bendix
PicClick Insights - Bendix PP7 Trailer Air Supply Valve Assembly - P/N: WWS 79101-3404 PicClick Exclusive
- Popularity - 1 watcher, 0.0 new watchers per day, 301 days for sale on eBay. Normal amount watching. 0 sold, 3 available.
Popularity - Bendix PP7 Trailer Air Supply Valve Assembly - P/N: WWS 79101-3404
1 watcher, 0.0 new watchers per day, 301 days for sale on eBay. Normal amount watching. 0 sold, 3 available.
- Best Price -
Price - Bendix PP7 Trailer Air Supply Valve Assembly - P/N: WWS 79101-3404
- Seller - 7,868+ items sold. 0.2% negative feedback. Top-Rated Plus! Top-Rated Seller, 30-day return policy, ships in 1 business day with tracking.
Seller - Bendix PP7 Trailer Air Supply Valve Assembly - P/N: WWS 79101-3404
7,868+ items sold. 0.2% negative feedback. Top-Rated Plus! Top-Rated Seller, 30-day return policy, ships in 1 business day with tracking.
Recent Feedback
Truck Trailer Air Brake PP7 Dash Control Valve$34.00 Buy It Now 10d 13h
Bendix 38N Dash Mounted Trailer Brake Valve - P/N K125176$135.66 Buy It Now 30d 13h
Bendix Trailer Protection Valve 109792. K55796. 5001186$60.00 Buy It Now 25d 14h
Bendix Trailer Air Brake Valve$50.00 Buy It Now 26d 13h
MV3 Red Modular Valve Trailer Air Supply Knob Qty. 1 # 802627 Ref# Bendix 298817$14.00 Buy It Now 15d 14h
Genuine Bendix 288239 PP-7 Trailer Supply Valve$50.00 Buy It Now 2d 11h
Bendix Pp-7 Trailer Supply Valve - 288239B1$40.00 Buy It Now 27d 8h
MV3 Red Modular Valve Trailer Air Supply Knob Qty. 1 # 802627 Ref# Bendix 298817$15.00 Buy It Now 11d 13h
SR-5 Trailer Spring Brake Valve (Replaces Bendix 065437 65437X 65437RX)$52.98 Buy It Now 28d 8h
BENDIX R-14 Valve Peterbilt Semi TrucK Trailer$39.99 Buy It Now 14d 18h
Bendix Trailer Air Supply Red Knob$10.00 Buy It Now 18d 15h
ABS Meritor Wabco ECU/Valve Assembly for Trailer Dollies # S4005001040$206.95 Buy It Now 22d 23h
Trailer Brake Control Valve Column Mount Bendix Tc2 275107 2530007530702 New$127.99 Buy It Now 14d 8h
PP-7 Trailer Air Supply Push Pull Knob. PAI Brand # LVK-1374 Ref.# Bendix 290655$10.00 Buy It Now 6d 17h
SR-5 Trailer Spring Brake Valve (Replaces Bendix 065437 65437X 65437RX)$51.92 Buy It Now 20d 16h
OEM - Bendix 800960 TRAILER BRAKE CONTROL VALVE$180.00 Buy It Now 28d 17h
PP-7 Push/Pull Trailer Supply Valve 40 PSI Release, Replaces 288239, H-30157$27.50 Buy It Now 24d 12h
PP7 Trailer Air Supply Push Pull Knob PAI # LVK-1385 Ref# Midland Haldex KN20900$17.00 Buy It Now 8d 17h
Bendix push/pull trailer air brake valve, 21315044 ,Tractor Protection Valve,$85.00 Buy It Now 26d 8h
102626 Air Brake Truck Trailer Relay Valve Vertical Ports (R12) 1/2 NPT$50.00 Buy It Now 23d 11h
Bendix BNXOR288239X Trailer Supply Pp 7 Valve$65.07 Buy It Now 9d 14h
2022 Volvo Vnl Bendix Trailer Brake Valve | P/N: 21314716$147.00 Buy It Now 5d 13h
Bendix Trailer Air Supply Valve 2B1214T, as shown *FREE SHIPPING*$56.99 Buy It Now 13d 5h
PP-7 Push/Pull Trailer Supply Valve 40 PSI Release, Replaces 288239, H-30157$27.50 Buy It Now 22d 3h
Bendix Preowned OEM push pull trailer air brake valve, 5013293 7494$85.00 Buy It Now 24d 12h
Bendix K033216 Sr 2 Trailer Air Brake Spring Brake Modulating Valve New$239.95 Buy It Now 17d 8h
PP-3 Trailer Emergency Push Pull Knob PAI Brand # LVK-1372 Ref.# Bendix 248435$15.00 Buy It Now 10d 10h
Bendix Push/Pull Trailer Air Brake Valve 21315044$76.80 Buy It Now 15d 9h
Air Standard Leveling Height Control Valve Kit for Truck Trailer 53321Q120$28.81 Buy It Now 21d 7h
Bendix 7267413 Trailer Brake Control Valve$56.99 Buy It Now 15d 9h
FAQs
The trailer air supply on the dash (red knob) would then pop out, disconnecting the supply air to the trailer. The tractor protection valve would then close, separating the tractor from the trailer service air system, and then the trailer brakes would lock, causing the entire vehicle to come to a stop.
What function does the trailer air supply valve provide? ›
The trailer supply valve is usually a push/pull type valve near the driver that supplies air to the trailer's brake system through the supply line. The tractor protection valve prevents air loss from the towing vehicle.
At what PSI does the inlet valve open at the TP 3 tractor protection valve? ›
The TP‑3 valve requires approximately 45 psi to open the inlet valve. Whenever the pressure from the trailer supply valve drops below 45 psi, the TP‑3 valve will close the service line shut‑off valve.
What does the trailer air supply valve look like on most truck tractors? ›
The valve is an octagon-shaped red button on the dashboard.
Supplies air to the trailer reservoirs, and by doing so controls the application and release of the trailer's spring brakes.
What happens if the safety relief valve in the air brake system releases air? ›
This valve is pre-set (usually at 150 psi [1,034 kPa]) and will blow off excess pressure. Once pressure is lowered, the safety valve will re-seal until an over-pressurized condition exists again. If a safety valve blows off excess pressure, this indicates a problem with the governor.
What happens when you push in the trailer air supply control knob? ›
The trailer air supply control on newer vehicles is a red eight-sided knob, which you use to control the tractor protection valve. You push it in to supply the trailer with air, and pull it out to shut the air off and put on the trailer emergency brakes.
Where is the trailer supply valve located? ›
The trailer supply valve (usually a red octagonal button) is mounted in the cab of the vehicle, easily accessible to the driver. You open the valve by pushing or pulling the button, depending on the type used. Note: The trailer-supply valve has also been referred to as the emergency valve.
What tells how much pressure should the relay valves send to the trailer brakes? ›
The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. The pressure in the service line is controlled by the brake pedal (and the trailer hand brake).
What is the recommended supply pressure for the air supply to control valves? ›
Establish the supply pressure.
The standard for our pneumatic pilots and level controllers is 30 PSI. The instrument air you supply to the regulator needs to be at least 60% of upstream pressure. For example, if you're trying to hold 100 PSI, you need at least 60 PSI of supplied air.
What is the maximum pressure for air release valve? ›
The air valve orifice size is typically based on a maximum pressure differential of 5 psi. Since the piping inlet pressure is atmospheric pressure (14.7 psia), then any negative low pipeline pressure may produce sonic flow.
The minimum pressure valve will prevent a portion of a pressure system from dropping below a set minimum pressure. Initially, as inlet pressure builds, the valve will open at a preset opening pressure allowing pressure to build throughout the system.
What is the main purpose of the trailer supply valve? ›
It serves as a link between the tractor and the trailer parking-brake systems by supplying air to the trailer reservoirs, through the supply (emergency) line. The trailer supply valve (usually a red octagonal button) is mounted in the cab of the tractor.
Should the trailer air supply control valve automatically close when the air pressure falls somewhere below? ›
Explanation: The trailer air supply control, also known as the tractor protection valve control, automatically closes when the air pressure falls to between 60 and 85 psi. This control valve protects the trailer brake system by closing off the air supply from the tractor when the pressure in the supply line drops.
What is the difference between air valve and air release valve? ›
Air release valves have smaller openings and can automatically release air pockets during normal system operation. Air/vacuum valves admit and release large amounts of air during pipeline filling and draining while combination air valves do the function of both an air release and a air/vacuum valve.
What happens to the trailer supply push pull valve if the tractor experiences a sudden air loss? ›
Note: Depending on the type of tractor protection system used, air loss from the tractor will stop immediately or it will bleed down to a minimum of 20 psi (138 kPa) and then shut off. Most newer units will shut off much higher than 20 psi. Click for larger image.
What will happen if the trailer supply line is disconnected from the truck? ›
Rupture of the service line will result in the escape of air pressure, causing a loss of pressure in the tractor system. This pressure drop will cause the tractor protection system to close off, exhausting the supply line to the trailer. This will cause the trailer brakes to go into an emergency application.
What is the function of the air release valve? ›
Air Release Valves, or Air Relief Valve function to release air pockets that collect at each high point of a full pressured pipeline. An air release valve can open against internal pressure, because the internal lever mechanism multiplies the float force to be greater than the internal pressure.
What occurs when the trailer relay emergency valve shuts off? ›
The check valve in the relay emergency valve will close, preventing any bleed back of pressure from the trailer reservoir. The loss of pressure in the trailer supply (emergency) line will cause the tractor protection system to seal off the tractor leaving sufficient air pressure to brake the tractor.
