John Deere 320 Skid Steer Loader – Specs, Parts & Maintenance

Description:

The John Deere 320 Skid Steer Loader is a mid-size, radial-lift machine built to handle a wide range of applications—from farm work to construction jobs. Known for its strong breakout force, reliable Yanmar diesel engine, and durable hydraulic system, the 320 provides dependable performance in a compact, easy-to-service frame. It’s a versatile solution for operators looking for lifting power without sacrificing maneuverability.

Specifications Overview:

• Engine:

  • Make/Model: Yanmar 4TNV88

  • Type: Naturally aspirated, 4-cylinder diesel

  • Displacement: 2.2L (134 cu in)

  • Gross Horsepower: 66 hp

  • Net Horsepower: 61 hp

• Transmission:

  • Hydrostatic drive

  • Optional 2-speed transmission

  • Max Travel Speed: 6.8 mph (single), 10.5 mph (2-speed)

  • Foot and hand lever controls

• Hydraulics:

  • Standard Flow: 20 gpm

  • System Pressure: 3,000 psi

  • Hydraulic Oil Capacity: 7.5 gal

  • Pump Type: Gear pump

• Dimensions & Weight:

  • Operating Weight: 6,450 lbs

  • Rated Operating Capacity: 1,950 lbs

  • Tipping Load: 3,900 lbs

  • Lift Height to Hinge Pin: 119 in

  • Width Over Tires: 69 in

  • Overall Height: 80.5 in

Maintenance & Replacement Parts:

The JD 320 is easy to maintain with accessible service points and widely available replacement parts.

• Most Replaced Components:

  • Hydraulic cylinder seal kits

  • Loader pins and bushings

  • Final drive parts and case drain filters

  • Air, oil, and fuel filter kits

• Common Issues & Fixes:

  • Hydraulic Leaks or Drift: Caused by worn seals – seal kits available.

  • Drive Motor Hesitation: Often linked to dirty case drain filters or worn motor seals.

  • Hard Starts in Cold Weather: Use block heaters and check glow plugs.

Pro Tips:

• Serial number is typically located on the right side loader arm or inside the operator cab near the seat base.

• Always grease pivot points and loader arm joints after every 10 hours of use.

• Clean radiators and coolers regularly to prevent overheating—especially in dusty job sites