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LMI HC3902 lifting torque limiter XCMG Crane
LMI HC3902 lifting torque limiter XCMG Crane
LMI HC3902 lifting torque limiter XCMG Crane
LMI HC3902 lifting torque limiter XCMG Crane

LMI HC3902 lifting torque limiter XCMG Crane

LMI HC3902 lifting torque limiter XCMG Crane

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Product Detail

Product Description: HC3902 Lifting Torque Limiter for XCMG Crane

The HC3902 Lifting Torque Limiter is a Load Moment Indicator (LMI) system specifically engineered for XCMG truck-mounted cranes. As the central safety monitoring unit of the crane‘s overload protection system, the HC3902 torque limiter continuously monitors critical operating parameters in real-time, calculates the actual load moment, and compares it against the crane’s rated capacity. When an overload condition is detected, the system activates audible and visual warnings and, if necessary, automatically cuts off dangerous crane movements to prevent tipping or structural failure.

Compatibility and Applications

The HC3902 torque limiter is suitable for telescopic boom truck cranes, crawler cranes, lattice boom cranes, and other types of lifting equipment. Within the XCMG product line, the HC3902 is installed as original equipment on various medium-duty truck crane models, including:

XCMG Crane ModelsNotes
QY25K series25 ton class; compatible with HC3902 configuration
QY40K40 ton class; direct fit (application verified)
QY50K series50 ton class; uses HC3902 or related HC3900 variant
QY50B50 ton class; compatible with HC3902
QY70K series70 ton class; compatible with HC3902
QY100K series100 ton class; uses upgraded variant (HC4900 for higher capacity)
QY130K series130 ton class; uses upgraded variant (HC4900 for higher capacity)
XGC series crawler cranesApplications requiring HC4900 for anti‑interference (e.g., offshore platforms, mining)

1. HC3900 Series LMI / Torque Limiter — Complete System Hardware

Part NumberPart Name / DescriptionApplication / Notes
409090012Load Moment Indicator (LMI) — HC3900AHC3900A model LMI for XCMG cranes; compatible with XCMG crane models (reference number only — confirm application before ordering)
409090004LMI Display Module — HC3902HC3902 display unit; may include display with integrated control logic; application verified for XCMG medium‑duty truck cranes
409090005LMI Control Unit — HC3902HC3902 CPU / main control module; compatible with XCMG cranes; document from Rančle Parts Engineering
409090006LMI Extension Module — HC3902HC3902 expansion / additional I/O unit; compatible with XCMG cranes; document from Rančle Parts Engineering

2. HC3900 / HC4900 Series LMI System — Sensors and Peripheral Components

Part NumberPart Name / DescriptionApplication / Notes
803686162Limit Switch (Anti‑Two‑Block Switch)XCMG XGS40K telescopic crane; anti‑two‑block limit switch; prevents hook block contact with boom tip; net weight 0.15 kg; OEM genuine XCMG spare part
819902783Load Limiter Measurer (Length Cable L=1 m)Load limiter length measuring cable; replacement cable for LMI system length sensor; 1 meter length; documented in XCMG crane spare parts catalog
803408720Height Limiter / Anti‑Two‑Block SwitchHeight limiter for XCMG truck cranes; safety device preventing hook‑to‑boom tip contact; complete assembly including switch body and cable
Hirschmann oil pressure sensors (factory‑supplied)Pressure sensors (rod side and no‑rod side)WIKA / Hirschmann sensors for measuring lift cylinder pressure; sensor signals provide the load calculation data for the LMI system
Angle SensorBoom angle sensor (generic XCMG part number varies by model)Measures boom elevation angle; input to LMI system for load moment calculation
Length Sensor / Cord Reel AssemblyBoom length measuring systemCord reel installed on boom; measures boom extension length and transmits height limiter signals

3. Hirschmann / PAT Load Moment Indicator Systems (Reference for Cross‑Compatibility)

Hirschmann (PAT) systems are the original equipment LMI suppliers for many XCMG cranes. The following part numbers are provided for cross‑reference only; actual installed system type depends on crane production year and specification.

Part NumberSystem NameApplication / Notes
PAT DS 50Load Moment Indicator (LMI)Hirschmann / PAT load moment indicator for XCMG QY50K, QY70K, QY100K, QY130K truck cranes; complete system including DS 50 display, sensors, and CPU
PAT DS 350Load Moment Indicator (LMI)Higher‑capacity LMI for larger XCMG truck cranes
PAT 110mAnti‑Two‑Block Switch (Height Limiter)Anti‑two‑block limit switch compatible with XCMG K‑Series truck cranes; sourced from PAT / Hirschmann system
803630700Height Limiter Assembly (QY50B Compatible)XCMG QY50B truck crane; complete height limiter assembly including switch, body, and wiring
803628975Height Limiter Switch (QY25K Compatible)XCMG QY25K truck crane; height limiter limit switch; documented in XCMG crane parts catalogs

4. XCMG Load Moment Indicator — Parts by Crane Model (Common Applications)

Part NumberPart Name / DescriptionCrane Model
409090012HC3900A Load Moment Indicator (LMI) — complete systemXCMG general crane applications
803628975Height Limiter Limit SwitchXCMG QY25K
PAT DS 50Load Moment Indicator (LMI) — complete systemXCMG QY25K, QY50K, QY70K, QY100K, QY130K
PAT 110mAnti‑Two‑Block Switch (Height Limiter)XCMG QY series K‑Series
803630700Height Limiter AssemblyXCMG QY50B
803686162Limit Switch (Anti‑Two‑Block)XCMG XGS40K


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Product Detail

Product Description: HC3902 Lifting Torque Limiter for XCMG Crane

The HC3902 Lifting Torque Limiter is a Load Moment Indicator (LMI) system specifically engineered for XCMG truck-mounted cranes. As the central safety monitoring unit of the crane‘s overload protection system, the HC3902 torque limiter continuously monitors critical operating parameters in real-time, calculates the actual load moment, and compares it against the crane’s rated capacity. When an overload condition is detected, the system activates audible and visual warnings and, if necessary, automatically cuts off dangerous crane movements to prevent tipping or structural failure.

Compatibility and Applications

The HC3902 torque limiter is suitable for telescopic boom truck cranes, crawler cranes, lattice boom cranes, and other types of lifting equipment. Within the XCMG product line, the HC3902 is installed as original equipment on various medium-duty truck crane models, including:

XCMG Crane ModelsNotes
QY25K series25 ton class; compatible with HC3902 configuration
QY40K40 ton class; direct fit (application verified)
QY50K series50 ton class; uses HC3902 or related HC3900 variant
QY50B50 ton class; compatible with HC3902
QY70K series70 ton class; compatible with HC3902
QY100K series100 ton class; uses upgraded variant (HC4900 for higher capacity)
QY130K series130 ton class; uses upgraded variant (HC4900 for higher capacity)
XGC series crawler cranesApplications requiring HC4900 for anti‑interference (e.g., offshore platforms, mining)

1. HC3900 Series LMI / Torque Limiter — Complete System Hardware

Part NumberPart Name / DescriptionApplication / Notes
409090012Load Moment Indicator (LMI) — HC3900AHC3900A model LMI for XCMG cranes; compatible with XCMG crane models (reference number only — confirm application before ordering)
409090004LMI Display Module — HC3902HC3902 display unit; may include display with integrated control logic; application verified for XCMG medium‑duty truck cranes
409090005LMI Control Unit — HC3902HC3902 CPU / main control module; compatible with XCMG cranes; document from Rančle Parts Engineering
409090006LMI Extension Module — HC3902HC3902 expansion / additional I/O unit; compatible with XCMG cranes; document from Rančle Parts Engineering

2. HC3900 / HC4900 Series LMI System — Sensors and Peripheral Components

Part NumberPart Name / DescriptionApplication / Notes
803686162Limit Switch (Anti‑Two‑Block Switch)XCMG XGS40K telescopic crane; anti‑two‑block limit switch; prevents hook block contact with boom tip; net weight 0.15 kg; OEM genuine XCMG spare part
819902783Load Limiter Measurer (Length Cable L=1 m)Load limiter length measuring cable; replacement cable for LMI system length sensor; 1 meter length; documented in XCMG crane spare parts catalog
803408720Height Limiter / Anti‑Two‑Block SwitchHeight limiter for XCMG truck cranes; safety device preventing hook‑to‑boom tip contact; complete assembly including switch body and cable
Hirschmann oil pressure sensors (factory‑supplied)Pressure sensors (rod side and no‑rod side)WIKA / Hirschmann sensors for measuring lift cylinder pressure; sensor signals provide the load calculation data for the LMI system
Angle SensorBoom angle sensor (generic XCMG part number varies by model)Measures boom elevation angle; input to LMI system for load moment calculation
Length Sensor / Cord Reel AssemblyBoom length measuring systemCord reel installed on boom; measures boom extension length and transmits height limiter signals

3. Hirschmann / PAT Load Moment Indicator Systems (Reference for Cross‑Compatibility)

Hirschmann (PAT) systems are the original equipment LMI suppliers for many XCMG cranes. The following part numbers are provided for cross‑reference only; actual installed system type depends on crane production year and specification.

Part NumberSystem NameApplication / Notes
PAT DS 50Load Moment Indicator (LMI)Hirschmann / PAT load moment indicator for XCMG QY50K, QY70K, QY100K, QY130K truck cranes; complete system including DS 50 display, sensors, and CPU
PAT DS 350Load Moment Indicator (LMI)Higher‑capacity LMI for larger XCMG truck cranes
PAT 110mAnti‑Two‑Block Switch (Height Limiter)Anti‑two‑block limit switch compatible with XCMG K‑Series truck cranes; sourced from PAT / Hirschmann system
803630700Height Limiter Assembly (QY50B Compatible)XCMG QY50B truck crane; complete height limiter assembly including switch, body, and wiring
803628975Height Limiter Switch (QY25K Compatible)XCMG QY25K truck crane; height limiter limit switch; documented in XCMG crane parts catalogs

4. XCMG Load Moment Indicator — Parts by Crane Model (Common Applications)

Part NumberPart Name / DescriptionCrane Model
409090012HC3900A Load Moment Indicator (LMI) — complete systemXCMG general crane applications
803628975Height Limiter Limit SwitchXCMG QY25K
PAT DS 50Load Moment Indicator (LMI) — complete systemXCMG QY25K, QY50K, QY70K, QY100K, QY130K
PAT 110mAnti‑Two‑Block Switch (Height Limiter)XCMG QY series K‑Series
803630700Height Limiter AssemblyXCMG QY50B
803686162Limit Switch (Anti‑Two‑Block)XCMG XGS40K


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WeChat:172 6962 9279

E-mail:asher@wuchenjialianspareparts.com

Tel:+86-172 696 29279

Address:No. 667, Zhujiang Road, Xuejiadao 

Street, Huangdao District, Qingdao, Qingdao Area, China (Shandong) Pilot Free Trade Zone

Products

Excavator Parts
Wheel Loader Accessories
Bulldozer Parts
Crane Accessories
Truck Parts
Engine Parts
Transmission Parts
Road Roller Accessories
Grader Accessories
Tire

Service

Pre-Sale Consultation

Logistics Services

After-Sale Services

Downloads

Company

About Us

Contact Us

 

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Construction
Port Logistics
Agricultural Applications

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