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The hydraulic pickup screen on a John Deere 310A backhoe is located within the transmission housing near the hydraulic filter return line, and accessing it requires draining the hydraulic system and removing key fittings. This screen plays a critical role in protecting the hydraulic pump from debris and contamination, especially in older machines where fluid cleanliness is paramount.
John Deere 310A Overview
The 310A was part of John Deere’s early generation of backhoe loaders, introduced in the late 1970s and produced through the early 1980s. It featured a naturally aspirated diesel engine, mechanical shuttle transmission, and open-center hydraulic system. Known for its reliability and ease of service, the 310A became a staple in municipal fleets, farm operations, and small contractors.
John Deere, founded in 1837, has long been a leader in agricultural and construction equipment. The 310 series evolved through multiple iterations—310B, 310C, and beyond—each adding improvements in hydraulics, operator comfort, and emissions compliance.
Terminology Notes
On the 310A, the pickup screen is located behind the fitting where the return hose connects to the transmission case. To access it:
Field Anecdotes and Practical Insight
In Maine, a retired UPS feeder driver servicing his 310A found the screen nearly blocked with fine sediment and fiber debris. After cleaning and reinstalling, hydraulic response improved noticeably. He noted that the screen had likely never been serviced in decades of use.
In Virginia, a technician working on a 410B (similar layout) discovered that a clogged screen was causing slow boom lift and erratic steering. Replacing the screen restored full hydraulic function without needing pump replacement.
Recommendations for Maintenance
The hydraulic pickup screen on a John Deere 310A is a small but vital component that protects the heart of the machine’s hydraulic system. Regular inspection and cleaning can prevent costly pump damage and restore performance. For owners of legacy equipment, understanding these hidden service points is key to keeping machines productive and reliable.
John Deere 310A Overview
The 310A was part of John Deere’s early generation of backhoe loaders, introduced in the late 1970s and produced through the early 1980s. It featured a naturally aspirated diesel engine, mechanical shuttle transmission, and open-center hydraulic system. Known for its reliability and ease of service, the 310A became a staple in municipal fleets, farm operations, and small contractors.
John Deere, founded in 1837, has long been a leader in agricultural and construction equipment. The 310 series evolved through multiple iterations—310B, 310C, and beyond—each adding improvements in hydraulics, operator comfort, and emissions compliance.
Terminology Notes
- Pickup Screen: A mesh filter located at the hydraulic fluid intake point, designed to catch large particles before they reach the pump.
- Hydraulic Filter Housing: The assembly that holds the spin-on or cartridge filter, typically mounted on the side of the transmission.
- Return Hose: The hydraulic line that carries fluid back to the reservoir or filter housing.
- Transmission Case Plug: A threaded access point used to reach internal components like the pickup screen.
On the 310A, the pickup screen is located behind the fitting where the return hose connects to the transmission case. To access it:
- Drain the Hydraulic System First: Expect to remove approximately 10 gallons of fluid. Use clean containers to inspect for metal shavings or sludge.
- Remove the Hydraulic Filter: Located on the left side of the machine, this step clears the way to reach the return fitting.
- Disconnect the Return Hose: This hose connects to fitting #2 in the hydraulic schematic. The screen is located behind this fitting.
- Extract the Screen Carefully: Use a pick or needle-nose pliers to avoid damaging the mesh. Inspect for tears, clogging, or deformation.
Field Anecdotes and Practical Insight
In Maine, a retired UPS feeder driver servicing his 310A found the screen nearly blocked with fine sediment and fiber debris. After cleaning and reinstalling, hydraulic response improved noticeably. He noted that the screen had likely never been serviced in decades of use.
In Virginia, a technician working on a 410B (similar layout) discovered that a clogged screen was causing slow boom lift and erratic steering. Replacing the screen restored full hydraulic function without needing pump replacement.
Recommendations for Maintenance
- Inspect Screen Every 500 Hours: Especially on older machines or those used in dusty environments.
- Use OEM or High-Quality Fluid: Contaminants in cheap hydraulic oil accelerate screen clogging.
- Replace Seals and O-Rings During Service: Prevent leaks and ensure proper pressure.
- Flush System if Screen Is Severely Contaminated: Use a low-viscosity flushing fluid and cycle through all functions.
- Keep a Spare Screen on Hand: Availability can be limited for vintage models.
The hydraulic pickup screen on a John Deere 310A is a small but vital component that protects the heart of the machine’s hydraulic system. Regular inspection and cleaning can prevent costly pump damage and restore performance. For owners of legacy equipment, understanding these hidden service points is key to keeping machines productive and reliable.
