Bobcat 543 Skid Steer Loader – Specs, Parts & Serial Guide

The Bobcat 543 Skid Steer Loader is a compact diesel-powered loader built for light to medium-duty tasks in construction, landscaping, and agriculture. Produced in the late 1980s and early 1990s, the 543 offered increased efficiency and reduced emissions compared to earlier gas-powered models.

Engine & Power:

• Engine: Kubota D950, 3-cylinder liquid-cooled diesel

• Displacement: 56.6 cu in (928 cc)

• Horsepower: 21 hp

• Fuel Capacity: 6.5 gallons

Transmission:

• Hydrostatic transmission

• Infinite variable speed forward and reverse

• Direct-drive wheel motors

• Foot pedal-operated lift and tilt functions

Hydraulic System:

• Hydraulic Pump Flow: 8.1 GPM

• System Pressure: ~2,000 psi

• Dual-function hydraulic lift and tilt cylinders

• Optional auxiliary hydraulics for attachments

Dimensions & Performance:

• Operating Weight: 3,800 lbs

• Rated Operating Capacity: 800 lbs

• Tipping Load: 1,430 lbs

• Height: 75.8 in

• Width: 49.4 in

• Length (w/ bucket): 106.2 in

• Travel Speed: 6.5 mph

Maintenance Essentials:

• Hydraulic seal kits – Shop Bobcat Cylinder Kits

• Kubota D950 engine parts – Explore Kubota Engine Parts

• Drive system components

• Fuel and air filters – regular replacements extend engine life

Common Issues & Fixes:

• Hydraulic Drifting or Weak Lift: Replace worn lift cylinder seals with hydraulic seal kits

• Starter or Glow Plug Issues: Typical for older diesel units—resolve with a Kubota D950 starter kit

• Wheel motor failure: Check for leaks and consider full hydrostatic service if traction is lost

Serial Number Info:

• Located on the right side of the frame near the operator platform

• Serial numbers usually start with 508XXXX or 509XXXX