John Deere Backhoe Loaders: 315C (After Serial Number 740893)
Key Notes:
Part Number: RE31721-KIT
Fits Boom Cylinder: RE31721
Includes: RE31716 Rod Seal Kit and AH212103 Bore Seal Kit — complete seal kit for both rod and bore ends
Rod Diameter: 56mm
Weight: 1 lb (0.45 kg)
Manufacturer: Bulldog / Hercules Hydraulics — Made in USA
Application: Boom cylinder seal kit — restores hydraulic integrity to the boom lift cylinder on John Deere 315C backhoe loaders built After Serial Number 740893
Serial Number Note: This is the late-serial version for 315C machines After Serial Number 740893 — confirm your serial number before ordering to ensure correct kit selection
Condition: Made in USA replacement part
Common Use Case or Symptoms: Use when the boom cylinder is leaking hydraulic fluid at the rod seal or exhibiting bypass at the piston — symptoms include boom drift under load, visible oil weeping at the cylinder rod, or loss of boom lifting capacity on John Deere 315C backhoe loaders.
Why Choose Broken Tractor:
✅ Complete Two-Kit Solution: Includes both the RE31716 rod seal kit and AH212103 bore seal kit in one order — everything needed for a full boom cylinder reseal in a single purchase
✅ Made in USA by Bulldog / Hercules Hydraulics: Premium American-made seals engineered for the demanding hydraulic pressures of John Deere backhoe boom cylinder applications
✅ Serial Number Verified Fitment: Correctly identified for late-serial 315C machines After Serial Number 740893 — eliminates the guesswork of ordering the wrong kit for your machine
$110.00
Shipping calculated at checkout. If any item in your order is temporarily unavailable, we'll contact you to arrange a back-order or refund — whichever you prefer.
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Our in house parts are manufactured following strict quality standards in our warehouse in Ohio. Parts such as hydraulic cylinders, pins, bushings, sheet metal, track adjusters, booms and dipper sticks are all ready to ship same day that they are purchased! With less time to wait for your shipment, you will be able to get back to work as quickly as possible.
Did you accidentally purchase the incorrect part? We offer returns and exchanges here at Broken Tractor. To proceed with a return, please call us toll free, and we will provide you with return authorization and a step by step return process for your convenience. We are more than happy to help you exchange your part for the correct one! Give us a call at 1-800-909-7060 and we would be pleased to help you.
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