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

18/Sep2026

Resolving “Heavy Steering And Main Pump Whine” On A Volvo L120G Wheel Loader

A varnish-seized flow-amplifier priority valve starved the steering circuit and dead-headed the main pump against the steering relief valve during full-lock turns

18/Sep2026

Curing “Swing Lockup And Pump Whine” On A JCB 220X-3 Excavator

A jammed swing brake release shuttle valve kept the mechanical brake engaged, forcing the main pump to dead-head against a locked swing motor and stalling hydraulics

18/Sep2026

Diagnosing “Power Loss And Auto-Regen Failure” On A Toyota 8FDU25 Diesel Fork...

A shorted DPF differential pressure sensor caused the ECM to falsely calculate a fully soot-loaded filter, triggering a destructive engine derate and preventing regen completion

17/Sep2026

Resolving “Harsh Downshift And Torque Converter Overheat” On A Volvo L120H Wh...

A clogged lockup solenoid filter screen caused continuous converter slippage, degrading transmission oil viscosity and inducing violent shift valve cavitation under heavy V-pattern loading

17/Sep2026

Curing “Sluggish Hydraulics And Continuous Pilot Pressure Alarm” On A Caterpi...

A shorted pilot pump pressure sensor harness caused the ECM to default into limp mode, zeroing the main pump displacement and disabling the proportional reducing valve

17/Sep2026

Fixing “Engine Dies After 10 Minutes And Regulator Icing” On A Mitsubishi FG2...

A restricted engine coolant flow to the vaporizer and a ruptured diaphragm caused Joule-Thomson freezing, blocking LPG flow and starving the engine after warmup

16/Sep2026

Resolving “Hard Shift Engagement And Gear Clash” On An XCMG LW500K Wheel Loader

A clogged proportional solenoid valve filter screen caused low clutch supply pressure, burning the 1st gear friction discs and inducing violent shift shock

16/Sep2026

Curing “Sluggish Cranking And Dead-Skip Pump Whine” On A Hyundai R305LC-7 Exc...

A pump regulator PC-EPC solenoid seized at maximum displacement electrically loaded the starter motor and forced the main pump to dead-head against a closed-center valve at idle

16/Sep2026

Diagnosing “Random Engine Stalling Under Load” On A Linde H25D Forklift

A cracked high-pressure fuel injector line O-ring allowed air ingress into the common rail, causing vapor lock and fuel starvation during heavy hydraulic lift cycles

15/Sep2026

Resolving “Bucket Weakness And Boom Chatter” On A Case 621G Wheel Loader

A scored boom lock valve sleeve caused massive high-pressure internal leakage, inducing severe boom chatter and overheating the hydraulic system to 110°C

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Resolving “Heavy Steering And Main Pump Whine” On A Volvo L120G Wheel Loader

Curing “Swing Lockup And Pump Whine” On A JCB 220X-3 Excavator

Diagnosing “Power Loss And Auto-Regen Failure” On A Toyota 8FDU25 Diesel Fork...

Resolving “Harsh Downshift And Torque Converter Overheat” On A Volvo L120H Wh...

Curing “Sluggish Hydraulics And Continuous Pilot Pressure Alarm” On A Caterpi...

Fixing “Engine Dies After 10 Minutes And Regulator Icing” On A Mitsubishi FG2...

Resolving “Hard Shift Engagement And Gear Clash” On An XCMG LW500K Wheel Loader

Curing “Sluggish Cranking And Dead-Skip Pump Whine” On A Hyundai R305LC-7 Exc...

Diagnosing “Random Engine Stalling Under Load” On A Linde H25D Forklift

Resolving “Bucket Weakness And Boom Chatter” On A Case 621G Wheel Loader