ONAN 503-1977 HOSE ASSEMBLY - ONAN Genuine OEM Part
ONAN
- Payment methods
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- SKU:
- ONAN 503-1977
- MPN:
- 503-1977
- Condition:
- New
- Availability:
- Ships (leaves our warehouse) within next business day if in stock
- Shipping:
- View Shipping Rates


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Description
- This is a genuine OEM ONAN part engineered specifically for Cummins Onan generators.
- Ensures secure and leak-free fluid transfer, critical for maintaining engine cooling and operation.
- Designed to withstand high temperatures and pressure, contributing to system durability and reliability.
- Optimize your power system’s efficiency and dependability with authentic Cummins Onan parts.
ONAN 503-1977 HOSE ASSEMBLY - Engineered Precision, Enduring Onan Excellence
The ONAN 503-1977 hose assembly plays a vital role in your generator’s fluid system by enabling consistent coolant flow essential for engine temperature regulation. Using this precise replacement part safeguards your equipment from overheating and premature wear. Invest now in this essential component to ensure your Cummins Onan system continues to perform at peak levels under load. Optimize operational safety and longevity today.
Benefit that Empower Every Engine’s Life
- 100% genuine ONAN OEM part, guaranteeing perfect compatibility and maintaining warranty integrity.
- Crafted with high-grade materials for superior resistance to heat, abrasion, and pressure.
- Improves fuel economy indirectly by preserving engine cooling efficiency.
- Reduces downtime risk by delivering consistent performance under demanding conditions.
Details
Category: Hoses
Product SKU: ONAN 503-1977
We are committed to guiding you through every step of your purchase to ensure the best fit and function for your Cummins Onan equipment. Reach out anytime via our help center for expert support. Your reliable repair journey starts with confidence—wishing you successful maintenance and sustained power supply performance.
Returns Information
You may return new, non-used, and unopened items within 30 days of delivery date under a 20% re-stocking fee in case you do not need it anymore or you have ordered a wrong item.
We cannot accept any returns on "Pumps, Motors, Electrical Items & Transmissions" whether the product is used or new, however in rare cases we may allow an exception under a 40% re-stocking fee.
If you need to return an item, please go to our chat located in the lower right corner, select the option “Returns” and follow the steps to submit your request. Please have on your hands pictures of the item, they will be requested. You will shortly receive an answer from our Customer Service Team providing authorization and return instructions. Likewise, if an exception cannot be authorized, you will receive an answer from us. No returns will be accepted in our warehouse without an RMA number (Return Merchandise Authorization).
All return shipping costs are on customer's responsibility and will not be refundable.
Returns are inspected once they arrive. If the inspection determines that the items are used, non-resellable condition, or damaged, the return will be denied and the customer will be contacted to ship the parts back at the customers' request and cost.
Cancellations
You may cancel your order, in whole or in part, only if the part is backordered and it isn't ready to ship. Once an order has been shipped, sent from the supplier to our warehouse, or in the dispatch line, we cannot cancel it. If your order is shipped, you will need to follow our return policy to return the items you no longer want.
If you need to cancel an order or item for any reason, you may submit a cancellation request directly through your account to the "more options" section or contact us by live chat. All the cancellation requests are evaluated before its approval. If you submit a cancellation request out of business hours, on a weekend or holiday, it will be processed on the next available business day.
Please allow for the cancellation to be confirmed, and check your account for updates on the status. The cancellation process usually takes 24-48 hours to be confirmed by email. We will process your cancellation request and issue a refund to your original payment method.
In the event that an item becomes no longer available (NLA), we will cancel it from your order and ship the remaining items to you. We will send you an email notification if we cancel any part of your order.
Some products may contain chemicals known to the State of California to cause cancer or reproductive harm. ⚠️ WARNING: www.P65Warnings.ca.gov