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Type :
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STARTER ARMATURE
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Specification :
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12V 1.1KW
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Pulley :
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11PCS
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Brand :
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NUOJIN
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Number :
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IM2102
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Quality :
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NEW
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Delivery time :
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10DAY
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Preparation: Prepare appropriate tools such as wrenches and screwdrivers, and ensure a clean working environment.
Install Drive-End Components: Slide the intermediate bearing support plate, one-way clutch, thrust washer, and other components onto the armature shaft in sequence, then install the shaft-end lock ring. Apply an appropriate amount of grease to the drive shaft splines, mount the drive gear assembly onto the drive shaft, followed by a new lock ring and holder, and properly connect the drive lever.
Install the Armature: First, install the clutch and shift fork into the rear end cover, then attach the intermediate bearing support plate, and insert the armature shaft into the rear end cover.
Install the Brush Assembly: Use a screwdriver to press down the brush springs, install the brushes into the brush holder, ensure good contact between the brushes and the commutator surface, then release the springs to secure the brushes in place.
Install the Commutator End Cover: Attach the brush holder clamp to the starter commutator end cover assembly. Install the commutator end cover with fixing screws and tighten to the specified torque (typically 15N・m).
Install the Drive-End Housing: Fill approximately 1/4 of the bearing hole in the drive-end housing with grease. Install the drive gear assembly into the housing, ensuring alignment between the gear assembly and the bolt holes on the housing. Mount the lever support and housing seal, align the starter frame with the housing, insert the through bolts, and tighten to the specified torque (usually 5.0-9.5N・m).
Install the Solenoid Switch: Mount the solenoid switch onto the drive-end housing. Connect the positive brush connector to the (M) terminal of the solenoid switch, then tighten the nut to a torque of typically 9-13N・m.
Overall Installation to the Engine: Attach the starter to the engine via the mounting bracket. First, slide the bracket over the starter, install the washer, spring washer, and M5 nut, and tighten firmly. Then mount the bracket (together with the starter) to the engine and tighten the fixing nut to a torque of typically 20N・m.
Inspection and Commissioning: After installation, check that the starter is securely mounted and all connections are correct. Then perform a power-on test to observe whether the starter operates normally.
The armature is a core precision part, and the 1.1KW specification is relatively compact. Handle it gently during transportation and installation, avoiding collisions, drops, or extrusion. This prevents deformation of commutator segments, bending of the armature shaft, or damage to winding coils, which could affect operating accuracy.
Thoroughly remove oil, metal debris, and dust from the surface of all components before installation. The armature, field windings, and solenoid switch can only be wiped with gasoline-dampened (wrung-out) cotton yarn or blown clean with compressed air; other components may be cleaned with liquid detergent. Prevent impurities from entering bearings, the commutator, or brush contact surfaces, as this may cause poor conductivity or component wear.
Only use compatible low-temperature grease. Apply a thin coat to the drive shaft splines and bearing holes; fill no more than 1/4 of the bearing hole in the drive-end housing. Excessive grease is prone to contaminating the commutator and brushes, leading to short circuits or operational jamming.
Ensure precise alignment between the armature shaft, bearing holes, and gear meshing surfaces when inserting the armature. Allow components to fit naturally using their own structural design; do not force pressing or tapping. This avoids bending of the armature shaft, damage to splines, or abnormal gear meshing.
Use a tool to press the brush springs steadily and insert the brushes slowly to prevent spring ejection. Ensure the four brushes make uniform and tight contact with the commutator surface. After installation, gently toggle the brushes to confirm flexible spring return, with no jamming, poor contact, or uneven wear.
Tighten all fasteners to the specified torque: 15N・m for commutator end cover screws, 5.0-9.5N・m for through bolts, 9-13N・m for solenoid switch nuts, and 20N・m for engine mounting fixing nuts. Loose fasteners may cause loosening and abnormal noise, while over-tightening may lead to housing deformation or thread stripping.
Disconnect the negative battery terminal before installation. The coil of the 1.1KW starter has a relatively limited current tolerance; confirm correct polarity when connecting solenoid switch terminals to avoid coil short-circuiting and burnout due to reverse connection.
Manually rotate the armature to confirm smooth operation without jamming or abnormal gear meshing noise. Recheck all connection points before power-on testing to ensure screws and nuts are secure, and the brushes make good contact with the commutator. This prevents component detachment or circuit failures during startup.
Do not directly touch the commutator surface or brush contacts with metal tools to avoid scratches or oxidation. Do not perform power-on testing before completing the entire installation, as this may cause excessive brush wear or coil overheating.
Verify that the armature model matches the starter before installation. Ensure it is a dedicated 12V 1.1KW specification to avoid installation interference or circuit mismatch caused by inconsistent power or size, which could lead to equipment failure.
References：
Car Engine Maintenance Made Easy: 800 Q&A: This book mentions that during starter reassembly, attention should be paid to checking the concentricity of all bearings, lubricating all friction parts with engine oil, ensuring the screws fixing the intermediate bearing support plate are equipped with spring washers, not omitting components such as the thrust washer on the end face of the drive pinion, maintaining a certain gap between the magnetic poles and the armature core, and adhering to the specified range for the axial clearance of the armature shaft. These precautions are of great reference value for the installation of the 12V 1.1KW starter armature.
PCauto: In its content related to the disassembly and assembly of automotive starters, it is pointed out that when installing a starter, the positive battery cable should first be connected to the solenoid switch, followed by the positive and negative wires. The ignition switch must be turned off before connection. Knocking on tightly fitted parts is strictly prohibited during disassembly and assembly, and components such as the armature can only be wiped with gasoline-dampened (wrung-out) cotton yarn. These precautions apply to various starters, including the 12V 1.1KW model.
Jingtong Auto Repair Online Platform: The content published on this platform states that starter reassembly should be carried out in the reverse order of disassembly. It is necessary to check bearing concentricity, lubricate all friction parts, pay attention to the installation of washers, and ensure the gap between the magnetic poles and the armature core. These key points provide guiding significance for the installation of the 12V 1.1KW starter armature.
Teaching Courseware on "Automotive Electrical Equipment Structure and Maintenance": The courseware introduces the disassembly and assembly steps of starters, including armature installation methods—such as applying grease to bushings during installation, key points for installing solenoid switches, stators, brushes, and brush holders—and mentions precautions such as checking the straightness of the armature shaft and the fit clearance between the armature journal and the bushing. This content provides specific operational guidance for the installation of the 12V 1.1KW starter armature.
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