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Model guides / Heavy Equipment Inspection / Bobcat S650 Skid Steer
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Bobcat S650 Skid Steer
Inspection Guide

A best-selling wheeled skid steer where the hydrostatic drive, chaincase, and Bob-Tach reveal a hard rental life.

The S650 is one of the most common skid steers in rental fleets, so hard use is the norm. The drivetrain and hydraulics carry the value, and the chaincase and attachment mount show how it was treated.

Known problem areas — what we check
Costly Safety Common Verify
Drive motors & hydrostatic system Costly

Worn drive motors cause pulling and creep.

CHECK Drive straight on level ground and check for creep with controls centered.

Chaincase & drive chains Costly

Stretched chains and low chaincase oil cause slop and failures.

CHECK Check chaincase oil and feel for drivetrain slack.

Bob-Tach mount & wedges Common

The attachment mount and wedges wear with heavy use.

CHECK Inspect the Bob-Tach and confirm attachments lock solidly.

Hydraulics & auxiliary Common

Lift and aux hydraulics weaken and drift.

CHECK Check lift drift and test auxiliary hydraulics.

Tires & engine Common

Tire and engine condition follow use.

CHECK Check tire wear and engine blowby.

Model-specific focus points
  • Drive on flat ground for pulling/creep
  • Check chaincase oil and chain slack
  • Inspect the Bob-Tach and run an attachment
  • Test lift and aux hydraulics
  • Watch for rental abuse
Tools for this inspection

Heavy-duty diagnostic laptop with OEM adapters & software · Hydraulic pressure test kit with assorted fittings · Undercarriage wear gauges · Pin & bushing wear measurement tools · Ultrasonic thickness gauge for structural steel & buckets · Infrared thermometer / thermal camera · Oil & fluid sampling kit for lab analysis · Digital borescope …
See the full Heavy Equipment Inspection tool kit →

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