Forklift Preventive Maintenance: What to Do Every 250 Hours

The 250-hour service interval is the foundation of any forklift preventive maintenance program. Miss it consistently and small problems become big failures. Do it right and your equipment runs longer, costs less to maintain, and keeps your operators safer.

Here's a practical guide to what should happen at every 250-hour PM — organized by system so you can work through it efficiently.

Before You Start

Park the forklift on a level surface. Set the parking brake. If it's an electric unit, disconnect the battery before working on anything electrical. If it's an IC unit, let the engine cool before working near the exhaust or engine compartment. Have your service manual handy — torque specs and fluid capacities vary by make and model.

1. Engine and Drivetrain (IC Forklifts)

  • Engine oil and filter — change at every 250-hour interval or per manufacturer spec
  • Air filter — inspect and clean; replace if dirty or damaged
  • Coolant level and condition — top off if needed; check for contamination
  • Drive belts — inspect for cracking, fraying, and proper tension
  • Spark plugs (gasoline/LPG) — inspect gap and condition; replace per schedule
  • LPG regulator and fuel system — inspect for leaks, check connections
  • Fuel filter — replace per schedule

2. Battery and Electrical (Electric Forklifts)

  • Battery water level — check and top off with distilled water (after charging)
  • Battery terminals and cables — clean corrosion, inspect for damage, check torque
  • Battery case — inspect for cracks, damage, or electrolyte leaks
  • Charger function — verify charging cycle completes normally
  • Battery discharge indicator — test function

3. Hydraulic System

  • Hydraulic fluid level — check and top off with the correct fluid type
  • Hydraulic hoses and fittings — inspect for leaks, chafing, and damage
  • Hydraulic filter — replace per manufacturer schedule (often at 500 hours, but inspect at 250)
  • Lift and tilt cylinders — inspect seals for weeping or active leaks
  • Control valve — inspect for external leaks

4. Mast, Carriage, and Forks

  • Mast channels — clean and inspect for damage or wear; lubricate per spec
  • Lift chains — clean, inspect for wear and corrosion, lubricate with chain lube
  • Chain tension — adjust if uneven; both chains should have equal tension
  • Carriage rollers and bearings — inspect for wear and smooth operation
  • Forks — inspect for cracks (especially at the heel), bends, and thickness wear
  • Fork positioner (if equipped) — inspect for leaks and smooth operation

5. Brakes and Steering

  • Brake fluid level — check and top off if low; investigate cause if consistently low
  • Service brake function — test pedal feel and stopping distance
  • Parking brake — test hold on grade; adjust if needed
  • Brake linings/pads — inspect thickness; replace if at or near minimum
  • Steering play — check for excessive free play; inspect tie rods and steering components
  • Steering fluid level (if hydraulic steering) — check and top off

6. Tires and Wheels

  • Tire condition — inspect for cuts, chunking, flat spots, and unusual wear
  • Tire pressure (pneumatic) — inflate to data plate spec
  • Wheel fasteners — check lug nut torque on all wheels
  • Drive axle seals — inspect for leaks

7. Lubrication

Grease all lubrication points per the manufacturer's lubrication chart. Common points include:

  • Mast tilt cylinder pivot pins
  • Steer axle pivot and wheel bearings
  • Overhead guard pivot points
  • Pedal linkage pivot points
  • Carriage side shift (if equipped)

Use the correct grease type specified in your service manual. Over-greasing is better than under-greasing on most pivot points, but avoid packing sealed bearings that don't have grease fittings.

8. Safety Devices and Operator Controls

  • Horn function
  • Backup alarm function
  • All lights — headlights, warning lights, strobe (if equipped)
  • Seat belt and operator restraint system
  • Overhead guard — inspect for cracks or damage; verify secure mounting
  • Hour meter function

Document Everything

Record the service date, hour meter reading, all items inspected, fluids added, parts replaced, and any deficiencies noted. A good PM record is the foundation of a defensible maintenance program and helps you track wear trends over time.

If a deficiency is found that can't be corrected during the PM, tag the machine out of service and create a work order. Never return equipment to service with known safety-related deficiencies unresolved.

Build the Schedule, Work the Schedule

The 250-hour PM only delivers value when it's done consistently. Track your fleet's hours, build a PM schedule, and don't let machines run past their service interval. The cost of a missed PM compounds quickly once a minor issue becomes a major repair — or a reportable incident.

⚠️ Disclaimer: This content is for general informational purposes only. It does not replace manufacturer procedures, OSHA requirements, qualified inspection or maintenance practices, or any applicable federal, state, or local regulations. Always consult your equipment manufacturer's documentation and applicable regulatory requirements before performing any inspection, maintenance, or service. View full disclaimer.

Back to How-To Guides