Internal and External Earth of Starter Motors

To understand the internal and external earth of the starter, you must understand what the earth is first. The earth is a term of circuit, most commonly seen in the auto repair industry.

The path that current flows through is called circuit. The current starts from the positive pole and pass through the entire circuit, of course, there must be resistance in the circuit or there will be a short circuit. After the current passes through all the electrical appliances and back to the negative pole that’s a formed closed loop.

There are also positive pole and negative pole on the battery of the car. The current flows from the positive pole of the battery and pass all the appliances on the car to the negative pole which formed a closed loop to supply the electricity to all the electrical appliances, so that all the appliances on the car can work properly. And because the body of the car is made of metal which has electrical conductibility so when people design the car they usually use the body of the car as the negative pole to connect with the negative pole of the battery.

The internal earth of the starter means the armature of the starter is directly connected with the housing. Because the housing is installed on the frame of the car, the current directly flows through the frame and back to the negative pole of the battery to form a closed loop. The external earth is the armature of the starter insulates from the housing, it needs a terminal to connect the negative pole of the battery to form a closed loop.

Tips from: Shuocun Zhou

Starter Motor Replacement For Komatsu S6D95; ISUZU 493

Komatsu Starter cross reference for Komatsu S6D95

Replacement Starter Motor for ISUZU 493

Common Starting Issues in Trucking Applications---Part 2

Slow Cranking: For the starter to be cranking, the control circuit would have to be working. So, if battery and cable checks are within specification and the vehicle still cranks slowly, then it’s a slow cranking problem and it’s time to replace the starter.

Click No-Crank: Check the control circuit. If the starter does not contain an Integrated Magnetic Switch, or IMS, then a voltage drop test will need to be performed on the vehicle control circuit. If the starter does have an IMS switch function, then the technician will have to verify that the vehicle’s control circuit is providing voltage to the starter IMS.

No-Click No-Crank: When this occurs, power is not being sent to the solenoid, making it very unlikely that the issue is related to the starter motor. A diagnostic tool can help you diagnose the complete starting and charging system, including the alternator, batteries, starter motor and wiring. The diagnostic tool can perform a full system check in about 25 minutes, making it a great investment for your workshop. So in a poor starting environment, or when a starter motor has failed, what could be wrong?


Batteries – By now you should have tested your batteries and replaced any that were faulty. Don’t be tempted by the false-economy of leaving one poor quality battery in a bank of four. And you should look at your battery cabling, as this can often be less than optimum from new. In the diagram below, the top illustration shows the original battery cable layout, which results in the two inner batteries working hard and the outermost two never receiving optimum charge. In the diagram below (Pic 1) shows an easy solution to balance the workload of the battery banks.



Tips from:http://www.dieselnews.com.au

Common Starting Issues in Trucking Applications---Part 1

Cranking problems can be frustrating, identifying and correcting the root cause does not have to be. The first step is to identify the symptoms. In a cranking system, you can divide your symptoms into one of three possible troubleshooting categories:

Slow Crank: The Mitsubishi starter will crank, however, the engine RPM is too slow to start the vehicle.

Click No-Crank: The solenoid clicks but the starter doesn’t crank.

No-Click No-Crank: The solenoid doesn’t click and the starter doesn’t crank.
Once you’ve identified which problem you’re dealing with, then you can start to remedy it. For all issues, the initial troubleshooting is the same: you start with the batteries.

STEP 1 – Begin at the batteries: Charge the batteries and perform a load test on each battery in the battery bank. If any batteries aren’t up to spec they need to be replaced or you will shorten the life of the other batteries and compromise the health of the starting circuit.

STEP 2 – Perform a voltage drop test: Once the batteries pass your tests, perform a voltage drop test on the starter main cables. The starter voltage drop should be less than .5V total on the cranking circuit. This is an important step and is often the cause of a slow cranking complaint. Yet voltage drop also is a leading cause of click or no-click complaints because almost every vehicle manufacturer uses the heavy positive post, located on the starter solenoid, as a place to pick up the current used to supply the control circuit.

STEP 3 – Identify the specific issue: Until now, the diagnostic path has remained the same regardless of the complaint. Now is where you address the specific issue.

Tips from: www.dieselnews.com.au

How to Replace a Car's Starter Motor---Part1

Replacing a starter motor is usually a straightforward but inconvenience job. Here's how it's done.

This gear-reduction starter is a lightweight drop-in replacement for the older starter that failed. By spinning the armature faster and reducing its output speed with a planetary gearbox, it's possible to get the same starter power in a smaller, lighter package.

Click. Click. Click. That's the noise your car makes when you twist the key. A few more clicks and now you've got a metallic screeching that makes all the dogs in the neighborhood start to bark. The dash lights are plenty bright, the headlights don't dim much when the key is twisted, but obviously something is wrong. With the clock ticking, you resort to that old standby: a jump-start. A few more screeches grating enough to make you cringe, and the engine finally spins merrily.

After work, it's the same story: Clunking and clicking, a few bars of the "Ballad of the Tortured Ring Gear," and you get to drive home instead of ride in the cab of the tow truck.

You've got a bad starter motor. Time to fix it before you're on the bus.

Tips from: http://www.popularmechanics.com

Starter Motor Replacement Supplier For ISUZU 4BC2;Hino DS70, DK10

Replacement Starter Supplier For ISUZU 4BC2

Replacement Hino Starter Supplier For Hino DS70, DK10