Mack 746-110139 Relay Valve 4 Ports

We offer fast and secure nationwide shipping. Most orders are processed within 1–2 business days.

Key Information:

– You’ll receive tracking details as soon as your order is shipped.

– Shipping quotes are provided upon request, especially for expedited delivery.

– Customers are responsible for all shipping charges, even on canceled orders after shipment.

We do not profit from shipping fees—they are passed directly from the carrier.

For urgent deliveries or special arrangements, please contact our team.

We accept return requests within 30 days of delivery. All returns must be authorized by Truck Supply Parts before sending any product back.

Returned items must be in their original packaging, clean, and in saleable condition. Unauthorized or misrouted returns may result in deductions for shipping costs.

Please note:

– A 25% restocking fee applies to most returns.

– “Special order” or obsolete items cannot be returned.

– Damaged or incorrect items caused by our error will not incur restocking fees.

Refunds are processed within 7–10 business days after approval.

Most of our products are backed by a manufacturer’s warranty of 1 to 2 years. If you believe a part is defective, please contact us to begin a warranty claim.

Important:

– Warranty evaluations may take 30–60 days for inspection and approval.

– Items must not be installed, used, or returned in damaged packaging.

– Claims for damage or shortages must be reported within 5 business days of delivery.

No returns will be accepted without prior authorization.

By placing an order with Truck Supply Parts, you agree to our full Terms & Conditions.

Highlights:

– Orders may be subject to cancellation if items are out of stock, obsolete, or priced incorrectly.

– Freight charges are non-refundable once an order is shipped.

– Delivery estimates are based on supplier data and are not guaranteed.

– The buyer assumes full responsibility for verifying the accuracy of orders and product fit.

All orders are subject to Florida law and jurisdiction in Miami-Dade County.

No returns will be accepted without prior authorization.