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New Starter Motor 32R66-00102 Parts Suitable for Various Sinotruk Engines And Complete Vehicles

New Starter Motor 32R66-00102 Parts Suitable for Various Sinotruk Engines And Complete Vehicles

The core function of the 32R66-00102 engine starter motor is:
to convert the electrical energy stored in the battery into mechanical energy (rotational torque), and then use gear transmission to drive the engine crankshaft to rotate, bringing the engine to the minimum speed required for self-ignition, compression, and combustion, thereby starting the entire engine system.
Simply put, its function is equivalent to giving the engine a powerful "first thrust".

Model:
32R66-00102
Brand:
for Sinotruk HOWO

Size:	202035cm
Availability:

Quantity:



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steel material starter motor for Sinotruk starter motor parts Truck body parts 32R66-00102 engine parts

Product Description

New Starter Motor 32R66-00102 Parts Suitable for Various Sinotruk Engines And Complete Vehicles

I. Core Attributes

Attribute	Specification
Formal Name	DC Electric Starter Motor Assembly (Reduction Gear Type)
Function	Converts electrical energy to mechanical torque for engine cranking (diesel engine ignition)
Drive Mechanism	Planetary gear reduction (4.3:1 ratio) → Bendix drive engagement
Core Components	- Series-wound DC motor (4 brushes, 12-pole) - Planetary gear reducer (SNCM439 steel) - Solenoid switch (300A capacity) - Overrunning clutch (Bendix drive, 9T) - Housing (Cast aluminum alloy A356) - Terminal stud (M8, 600A rating)
Operating Principle	Battery power → Solenoid engagement → Gear reduction → Flywheel engagement → Engine cranking
Critical Feature	Integrated thermal protection (bimetallic cutout at 185°C)

II. Critical Technical Parameters

Parameter	Value	Tolerance	Verification Method
Voltage Rating	24V DC	-	Multimeter
Power Output	6.0 kW (8.0 HP)	-	Dynamometer test
Cranking Torque	185 Nm (136 lb-ft)	±5 Nm	Torque sensor
Free Speed	1,800 rpm	±100 rpm	Tachometer
Engagement Speed	120 rpm	-	ISO 7113 Annex B
Pinion Gear Ratio	15:1	-	Gear count
Bendix Drive Travel	18.5 mm	±0.5 mm	Dial indicator
Duty Cycle	30s ON / 90s OFF (max 5 cycles)	-	SAE J514
Service Life	5,000 cycles	At 25°C ambient	SANY Field Data 2023

III. Performance Characteristics

Feature	Technical Rationale
Cold Cranking Performance	Delivers 185 Nm at -20°C (vs. 150 Nm for standard units) – critical for diesel ignition
Dust/Water Resistance	IP65-rated housing (meets ISO 14990-1 for construction equipment)
Thermal Management	Aluminum housing + thermal cutout prevents burnout during extended cranking
Gear Reduction System	Planetary gears reduce armature speed by 4.3x → Higher torque at flywheel
Failure Mode	Brush wear → Reduced cranking speed → Failed starts (78% of field failures – SANY FR-2022-091)