The 91776528 Starter Motor is used in the electrical starting system for CASE 570 ST and CASE 570 SV backhoe models. The starter motor is an important electrical component that helps crank the engine during machine start-up.

When the ignition key is turned, the starter motor engages with the engine flywheel to rotate the engine until it starts running. A good starter motor is important for smooth engine starting, especially for machines that operate under heavy-duty working conditions, outdoor environments, and long operating hours.

This starter is suitable for replacement when the original starter motor is weak, damaged, slow to crank, making abnormal noise, or unable to start the engine properly.

Compatible / Suitable Models

• CASE 570 ST
• CASE 570 SV

• Part Number: 91776528
• Product Type: Starter Motor
• Application: Electrical Systems
• Voltage: 12V
• Power: 3.5kW
• Teeth: 10 Teeth
• Size Reference: 38mm
• Used For: Engine starting system

Common Symptoms

This starter motor may need replacement when:

• Engine is difficult to start
• Starter motor cranks slowly
• Starter motor has clicking sound but engine does not crank
• Starter motor does not respond when turning the key
• Abnormal noise during starting
• Starter gear teeth are worn or damaged
• Electrical starting system becomes weak
• Machine needs repeated attempts before starting

Importance / Why Replace

The starter motor plays an important role in starting the engine. If the starter motor becomes weak or faulty, the engine may fail to start, causing machine downtime and work delays. A faulty starter can also increase stress on the battery, wiring, relay, and other electrical components.

Replacing a weak or damaged starter motor helps restore reliable engine starting performance and supports smoother machine operation.

Recommended Inspection

Before replacement, it is recommended to inspect:

• Battery condition and voltage
• Battery terminal connection
• Starter relay and wiring
• Ground cable condition
• Starter mounting bolts
• Starter gear teeth
• Flywheel ring gear condition
• Abnormal noise during cranking

If the battery and wiring are in good condition but the starter is still weak or not functioning, starter motor replacement is recommended.

91776528 Starter Motor 是用于 CASE 570 ST 和 CASE 570 SV 的启动马达，属于机器电器启动系统的重要零件。启动马达的主要作用是在启动机器时带动发动机转动，让发动机可以顺利启动。

当操作员转动钥匙时，启动马达会与发动机飞轮配合，帮助发动机进行初步转动，直到发动机成功启动。对于长期工作、重型操作、户外环境使用的 backhoe 来说，一个状态良好的启动马达非常重要。

当原本的启动马达出现无力、损坏、启动慢、异响或无法正常带动发动机时，就建议更换此零件。

适用车型

• CASE 570 ST

• CASE 570 SV

• 零件号码： 91776528

• 产品类型： Starter Motor / 启动马达

• 使用位置： Electrical Systems / 电器系统

• 电压： 12V

• 功率： 3.5kW

• 齿数： 10 Teeth

• 尺寸参考： 38mm

• 用途： 发动机启动系统

常见更换情况

如果出现以下情况，可能需要更换启动马达：

• 发动机难启动

• 启动时转动无力

• 启动时只有 clicking 声，但发动机不转

• 转钥匙时启动马达没有反应

• 启动时有异常声音

• 启动齿轮磨损或损坏

• 电器启动系统变弱

• 机器需要多次尝试才能启动

为什么需要更换

启动马达是发动机启动系统的重要零件。如果启动马达变弱或损坏，发动机可能无法正常启动，导致机器不能开工，影响工作进度。损坏的启动马达也可能增加电池、电线、relay 和其他电器零件的负担。

更换状态不良的启动马达，可以帮助恢复发动机正常启动表现，让机器操作更稳定可靠。

建议检查

更换前建议检查：

• 电池电量和电压

• 电池头连接是否松动

• Starter relay 和线路

• Ground cable 状态

• 启动马达固定螺丝

• 启动齿轮是否磨损

• 飞轮齿圈状态

• 启动时是否有异常声音

如果电池和线路正常，但启动马达仍然无力或没有反应，建议更换启动马达。