10-22-2025, 07:25 PM
John Deere 310A Backhoe Loader Overview
The John Deere 310A is a second-generation backhoe loader introduced in the late 1970s, designed for trenching, loading, and utility work. With a naturally aspirated diesel engine producing around 70 horsepower and a mechanical reverser transmission, the 310A became a staple in municipal fleets and small contractor operations. John Deere, founded in 1837, has produced millions of machines globally, and the 310 series remains one of its most enduring product lines.
The 310A features a mechanical reverser system that allows directional changes without clutching, making it ideal for repetitive loader work. The reverser housing contains the charge pump and directional clutch packs, and accessing it requires careful disassembly to avoid damaging internal components.
Terminology Notes
Removing the reverser housing involves separating it from the transmission case. The charge pump is mounted on the rear of the housing, and most internal components remain attached during removal.
Recommended steps:
In Alabama, a millwright preparing to replace the charge pump on his 310A asked whether the internals would fall out when the housing was removed. After consulting the technical manual and performing the job, he confirmed that the clutch packs and shafts remained intact, but a small thrust washer dropped unexpectedly. He recommended laying down a clean mat and using magnetic trays to catch any loose parts.
In Oregon, a retired mechanic recalled that early 310A models had minor variations in dowel pin placement. He advised marking the housing and case with paint before removal to aid reassembly alignment.
Recommendations for Technicians and Owners
Removing the reverser housing on a John Deere 310A is a manageable task with proper preparation and attention to detail. Most internal components remain attached, but technicians should be alert for small parts that may shift or fall during disassembly. With clean work practices and careful alignment, the charge pump can be replaced without disturbing the clutch packs or damaging the transmission.
The John Deere 310A is a second-generation backhoe loader introduced in the late 1970s, designed for trenching, loading, and utility work. With a naturally aspirated diesel engine producing around 70 horsepower and a mechanical reverser transmission, the 310A became a staple in municipal fleets and small contractor operations. John Deere, founded in 1837, has produced millions of machines globally, and the 310 series remains one of its most enduring product lines.
The 310A features a mechanical reverser system that allows directional changes without clutching, making it ideal for repetitive loader work. The reverser housing contains the charge pump and directional clutch packs, and accessing it requires careful disassembly to avoid damaging internal components.
Terminology Notes
- Reverser Housing: The cast assembly between the engine and transmission that contains the directional clutch packs and charge pump.
- Charge Pump: A hydraulic pump that supplies pressure to the reverser clutches and lubrication circuits.
- Clutch Packs: Sets of friction and steel plates that engage forward or reverse motion.
- Splined Shaft: A shaft with ridges that mate with internal gears or couplings.
Removing the reverser housing involves separating it from the transmission case. The charge pump is mounted on the rear of the housing, and most internal components remain attached during removal.
Recommended steps:
- Drain All Fluids: Hydraulic and transmission oil must be drained to prevent spills and contamination.
- Support the Transmission and Engine Separately: Use jacks and cribbing to prevent misalignment or stress on the bell housing.
- Remove Linkages and Wiring: Disconnect all control rods, solenoids, and sensors attached to the reverser.
- Unbolt the Housing Carefully: Use a torque pattern to avoid warping. The housing may be doweled and require gentle prying.
- Slide the Housing Straight Back: Avoid tilting or twisting, which can damage the splined shaft or clutch alignment.
- Inspect for Loose Components: While most internals stay in place, small washers or thrust bearings may dislodge during removal.
In Alabama, a millwright preparing to replace the charge pump on his 310A asked whether the internals would fall out when the housing was removed. After consulting the technical manual and performing the job, he confirmed that the clutch packs and shafts remained intact, but a small thrust washer dropped unexpectedly. He recommended laying down a clean mat and using magnetic trays to catch any loose parts.
In Oregon, a retired mechanic recalled that early 310A models had minor variations in dowel pin placement. He advised marking the housing and case with paint before removal to aid reassembly alignment.
Recommendations for Technicians and Owners
- Use the Technical Manual for Torque Specs and Diagrams: Avoid guessing bolt patterns or component orientation.
- Replace Seals and Gaskets During Reassembly: Prevent future leaks and ensure long-term reliability.
- Inspect the Charge Pump for Scoring or Wear: Replace if tolerances exceed spec.
- Clean All Mating Surfaces Thoroughly: Dirt or gasket residue can cause misalignment and leaks.
- Test Clutch Engagement Before Final Assembly: Bench test the reverser if possible.
Removing the reverser housing on a John Deere 310A is a manageable task with proper preparation and attention to detail. Most internal components remain attached, but technicians should be alert for small parts that may shift or fall during disassembly. With clean work practices and careful alignment, the charge pump can be replaced without disturbing the clutch packs or damaging the transmission.
