Construction machinery repairing and maintenance knowledge for brand equipments Factory China - New - Liteng Machinery

09/Jun2026

Fixing Intermittent Lift Dropout On A Crown RC 5500 Electric Forklift

Diagnosing a pitted 1A contactor and worn traction motor brushes causing severe voltage sag during hoist

09/Jun2026

Eradicating Persistent Engine Derate On A Cat 336F Excavator

How a clogged Diesel Exhaust Fluid doser and fouled NOx sensor created a cascading emissions failure

09/Jun2026

Resolving Intermittent Pilot Pressure Loss in A Volvo L120H Loader

A collapsed pilot filter and sheered roll pin cause sudden, dangerous steering and implement failures

08/Jun2026

Fixing Heavy Steering On A Hyster H80FT Internal Combustion Forklift

Diagnosing a restricted priority flow valve and worn orbital rotor in the hydraulic steering system

08/Jun2026

Eradicating Swing Bearing Shudder On A Komatsu PC360 Excavator

Diagnosing and repairing a worn swing motor brake and contaminated control valve spool

08/Jun2026

Resolving Torque Converter Stall-Out in A Cat 950M Wheel Loader

How a failing lock-up clutch seal and contaminated transmission oil led to severe power loss under heavy load

07/Jun2026

Forklift Maintenance Case: Orbital Motor Cross-Center Spool Wear And Free-Steer

A 5-ton pneumatic forklift exhibited terrifying "free-steer." The operator would turn the wheel 90 degrees, and the rear wheels wouldn't move. Then, suddenly, the wheels would snap to full lock. Th...

07/Jun2026

Excavator Maintenance Tip: Swing Bearing Backlash And The 0.8mm Discard Limit

Operators often ignore a "loose" swing bearing until the entire upper structure separates from the undercarriage. The swing bearing is a massive double-row ball bearing. As it wears, axial clearanc...

07/Jun2026

Loader Maintenance Case: Axle Tramp And The 15 Hz U-Joint Destruction

A wheel loader was experiencing violent driveline vibrations and shearing drop-box spline bolts. The issue only occurred when braking hard from 25 km/h with a full bucket. The shop replaced the tra...

06/Jun2026

Forklift Maintenance Case: 2% Chain Pitch Elongation And The Yield Point

A 5-ton capacity forklift was experiencing severe juddering when lifting near its maximum rated load. The lift cylinder was holding, but the mast was physically binding and groaning. The mechanic s...

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Knowledge

Fixing Intermittent Lift Dropout On A Crown RC 5500 Electric Forklift

Eradicating Persistent Engine Derate On A Cat 336F Excavator

Resolving Intermittent Pilot Pressure Loss in A Volvo L120H Loader

Fixing Heavy Steering On A Hyster H80FT Internal Combustion Forklift

Eradicating Swing Bearing Shudder On A Komatsu PC360 Excavator

Resolving Torque Converter Stall-Out in A Cat 950M Wheel Loader

Forklift Maintenance Case: Orbital Motor Cross-Center Spool Wear And Free-Steer

Excavator Maintenance Tip: Swing Bearing Backlash And The 0.8mm Discard Limit

Loader Maintenance Case: Axle Tramp And The 15 Hz U-Joint Destruction

Forklift Maintenance Case: 2% Chain Pitch Elongation And The Yield Point