Motor Grader Buying Guide: Blade, Control and Finish Quality

A motor grader is bought for one thing: a precise finish. The blade, the circle and the control system decide how well it does that job — here is what to check.

Blade length and circle

The blade length sets how wide a pass the grader cuts, and the circle lets the blade rotate and angle for cutting, spreading and finishing. Match the blade to your road width so you finish a lane in as few passes as possible, and check that the circle rotates smoothly — slop here shows up as a wavy finish.

Control system

Older graders use mechanical or hydraulic lever controls; newer ones use joystick or GPS-assisted control. The control system affects operator fatigue and finish quality more than any other single feature. For a used grader, test every function — blade lift, angle, circle and scarifier — and watch for drift under load.

What to check on a used grader

• Blade and circle wear — the blade edge and circle teeth wear with use.
• Hydraulics — cylinder drift and leaks on every function.
• Articulation joint — play at the frame pivot.
• Tyres — grader tyres are a large, specific cost.

All captured in the written 29-point inspection so the condition is verified, not assumed.

Bottom line: judge a motor grader by blade and circle precision, test every function under load, and price the tyres and blade wear into the deal.