ONAN 503-1978 - HOSE ASSEMBLY ONAN/CUMMINS - Original OEM part
ONAN
- Payment methods
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- SKU:
- ONAN 503-1978
- MPN:
- 503-1978
- Availability:
- Ships (leaves our warehouse) within next business day if in stock
- Shipping:
- View Shipping Rates


Available Inventory
Get what you need quickly with our wide stock and fast shipping.
Competitive Pricing
Enjoy competitive rates and great deals on every order.
Customer Support
Our team is always ready to answer your questions and provide the best assistance.
Description
- Engineered to deliver exceptional reliability and long-lasting performance
- Designed with precision to guarantee exact fitment and maximum efficiency
- Manufactured from premium materials ensuring resistance to wear and environmental factors
- Certified genuine ONAN OEM product for seamless integration with your equipment
ONAN 503-1978 HOSE ASSEMBLY - Experience Unwavering Durability and Trusted Performance
The ONAN 503-1978 HOSE ASSEMBLY stands as a vital component designed to maintain effective fluid transfer within your outdoor power equipment. Built for durability, this OEM hose assembly ensures consistent operation and protects your machinery from leaks and damage. Invest in this authentic ONAN part now and secure the longevity of your equipment. Choose precision, choose reliability, choose ONAN.
Essential feature that ensures peace of mind
- Constructed with robust materials to withstand high pressure and temperature extremes
- Timely replacement prevents performance loss and costly repairs down the line
- Order now to maintain your equipment’s safety, warranty compliance, and uninterrupted operation
Details
Category: Hoses-Engines Parts
Product SKU: ONAN 503-1978
Our customer support team is prepared to provide expert guidance throughout your purchase process. Feel free to reach out via our help center with any questions or concerns. We are committed to helping you achieve the best repair outcome and ensuring your equipment remains dependable for years to come.
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