If you consider yourself a mechanical enthusiast, you'll be delighted to discover that replacing the alternator in a John Deere excavator is a relatively straightforward task. In this comprehensive guide, we will take you through each step of the process, ensuring your safety throughout.
It's important to note that the procedure we outline here is nearly identical for all John Deere excavator models, regardless of their size.
Step 1: Lifting the Cabin
To begin, you'll need to unbolt the front panel of your mini excavator. Once that's done, carefully remove the front lower glass and the red-capped cabin bolts using either a 19mm socket or wrench.
Now, it's time to lift the cabin. You can achieve this by utilizing either a crane or a jack. However, before doing so, make sure to close the door securely. It's crucial to remember that you should never place your arm beneath the cabin until you have properly fixed the safety lock in place.
Before proceeding to remove any wiring connected to the excavator alternator, it is essential to disconnect the ground from the battery. This precautionary measure ensures that you can work on the alternator safely, without any risk of injury.
Step 2: Disconnecting the Battery
The battery of your John Deere excavator is accessible behind the panel shown in the accompanying image. Once you've gained access, begin by disconnecting the ground terminal, rather than the positive terminal.
Disconnecting the positive terminal would result in grounding all other electronics within the excavator, potentially causing severe damage to the alternator. To identify the ground terminal, look for the negative sign.
Step 3: Removing the Alternator
To remove the excavator alternator, start by cutting the zip ties holding the alternator wires in place, allowing them to be free. This will make maneuvering the alternator much easier.
Next, unplug the three wires from the alternator, ensuring none of them have any rips or tears. Following this, you can disconnect the charge wires using a 10mm socket wrench.
When disconnecting, it's worth noting that the entire stud may rotate, potentially damaging the wires inside the alternator. To prevent this, firmly hold onto the wire to keep the stud in place while undoing the nut. Once the nut is removed, you can proceed to detach the positive wire.
In this particular excavator, the alternator serves as the fan belt adjuster. By loosening the bolt on top and the through bolt and nut at the bottom, you can pivot the alternator and remove it from the belt.
Finally, using a 14mm wrench, remove the remaining nuts and bolts. It's important to follow the correct sequence: start with the nut, followed by the bolts. This will allow the fan belt to dislodge effortlessly.
Step 4: Compare the New and Old Alternators
After removing the old excavator alternator, compare it with the new one. Check if the pulleys, mounts, and wiring connections are the same. You can also change the pulley if it is worn out.
Step 5: Replace the Alternator
Once you have confirmed that the new and old alternators are indeed the same, it is time to proceed with the replacement process. Follow the reverse order of the steps you took to remove the old alternator.
Begin by reattaching the lower bolt first. Carefully pivot the alternator up and secure the belt onto the pulley. Ensure that the belt is properly aligned with both the crankshaft and the fan. Proceed by reinstalling the top bolt and spacer. However, avoid tightening this bolt completely to allow for belt tension adjustment.
In case you notice any movement in the alternator, you can use a pry bar to stabilize it. However, exercise caution to prevent any damage to the wires. Gently pry off the engine lifting point to ensure that the belt is tight.
Once you have stabilized the alternator, proceed to tighten both the top and bottom bolts. It is worth noting that you do not need to use a wrench to tighten the nut, as the bolt has a keeper on it.
With the alternator securely mounted, it is time to reconnect the wires. When reconnecting, listen for a click to ensure a proper connection. Additionally, it is advisable to clean the electrical connection using an emery cloth for optimal performance.
After installing the alternator and ensuring all connections are secure, it is crucial to take precautions to prevent any damage to the wires. Consider using zip ties or zap straps to secure everything in place, ensuring that the wires do not rub against the alternator.
Step 6: Reconnect the Battery
Now that the alternator is successfully mounted, it is time to reconnect the battery. Begin by reconnecting the ground. It is normal to experience a small spark during this process, which indicates that the computer capacitors are recharging. Always double-check that the terminals are securely tightened and do not have any play when touched.
Step 7: Test the Alternator
To ensure that the new alternator is functioning correctly, it is necessary to test its performance. You can use a multimeter or testing light to check the voltage of the excavator alternator battery.
Before starting the engine, the battery should read around 12.5 Volts. After starting the engine, you should observe a voltage reading of approximately 14 Volts. If the voltage exceeds 15 Volts, it indicates that the alternator is overcharging.
Occasionally, you may encounter a reading of around 12.5 Volts even when the machine is running. In such cases, it is recommended to inspect the alternator's back to determine if it is charging properly.
While conducting the test, it is crucial to exercise extreme caution due to the presence of spinning fans, the fan belt, and hot exhaust. Ensure that you are grounded and carefully touch the positive terminal on the back of the alternator to obtain a reading, as illustrated in the accompanying image. A reading around 14 Volts indicates that the battery is charging as expected.
Step 8: Reset the Excavator Cab
The final step in the excavator alternator replacement process involves repositioning the cabin. Lift the cab to release the safety lock, and then slowly lower it back into place. Proceed by installing the three mounting bolts and reattaching the front glass. Finally, replace the front panel.
With these steps completed, your excavator is now ready to resume its work with a fully functional alternator.
Popular Alternator of a John Deere Excavator
12V 20A Alternator AM877557 for John Deere
12V 20A Alternator AM877557 for Yanmar 3TNE74 3TNM72 3TNV76 John Deere 1070 2210 2243 2320 2520 4010 4110 4115 445 770 F915 X495
Replace Part Number: AM877557, MIA10338, SE501822, SE501843, AM879144, AM877958, M805471,
M805473, LS22101, 400-58013, 40058013, 10939N, WA10939, 309-10939, 30910939, 10939, GP9165, GP8136
Fit for Engine: Yanmar 3TNE74, 3TNM72, 3TNV76
Applications: Fit for John Deere Tractor And Lawn Mower: 322, 330, 332, 375, 415, 425, 445, 455, 670, 770, 790, 870, 970, 990, 1070, 2243, 3375, 2210, 2305, 2320, 2500, 2500A, 2500B, 2500E, 2520, 2653A, 2653B, 4010, 4100, 4110, 4115, 485, 48C, 495, 54HC, 60HC, F912, F915, FD671D, FD671D-KS02, FD711D, FD750D, FD750D-JS12, FD750D-KS12, FH641D, X465, X475, X485, X495, X575, X585, X595, X700, X710, X720, X724, X728, X729, X730, X734, X738, X739, X740, X744, X748
12V Alternator AT318374 for John Deere
12V Alternator AT318374 for John Deere 210LJ 310G 310J 310K 310K EP 310SG 310SJ
Part Numbers: AT318374, SE502881
Specification: 12 Volt, CW rotation
Applications:
John Deere
Backhoe, Loader: 310G, 310J, 310K, 310SJ, 310SK, 315SJ, 315SK, 410G, 410J, 410K, 710G, 710J
John Deere Dozer, Crawler: 450J, 550J, 650J
John Deere Loader: 210K, 210LJ Deere
12V Alternator RE210793 for John Deere
12V Alternator RE210793 for John Deere Tractor 7270R 7290R 7630 7730 7830
7930 8130 8230
Replace Part Number: John Deere: RE210793, AL5058N, AL5058X, RE555751, SE510834
Bosch Mfg: 0-124-625-108, 0124625108, 0-124-625-029, 0124625029
Mfg: 12795, 220-5681, 2205681
Specification:
Voltage: 12
Amps: 200
Mtg Ear 1 Hole: 10.2mm Unthreaded
Mtg Ear 2 Hole: 10.2mm Unthreaded
Pulley Grooves: 8
Pulley Type: Solid
Application:
John Deere Harvester: 7760
John Deere Construction & Industrial: 9430, 9530, 9630
John Deere Sprayer: 4730, 4830, 4930, 4940
John Deere Tractor: 7210R, 7230R, 7250R, 7270R, 7290R, 7630, 7730, 7830, 7930, 8130, 8230, 8230T, 8245R, 8270R, 8295R, 8320R, 8320RT, 8330, 8330T, 8345R, 8345RT, 8370R, 8370RT, 8430, 8430T, 8530, 9230, 9330, 9410R, 9430, 9430T, 9460R, 9460RT, 9510R, 9510RT, 9530, 9530T, 9560R, 9560RT, 9630, 9630T
24V Alternator 8980921161 for John Deere Excavator
24V Alternator 8980921161 for Isuzu Engine 4HK1 John Deere Excavator 245GLC 225DLC 230GW 220DW 190GW
Replace Part Number:
8980921161, 8980921162, 8973750170, 8973750171, 8980921160, 0350004558, 0350004598, 0350005230, 035000-4848, 0-35000-4848, 0350004848, 8-98092116-1, 8-97375017-1
Specification: Voltage (V): 24
Amperage (A): 50
Pulley Grooves: 8
Fit for Isuzu Engine: 4HK1
Applications: Fit for John Deere Excavator: 245GLC, 225DLC, 230GW, 220DW, 190GW
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Welcome to Fab Heavy Parts' online catalog, where you can explore a delightful array of Alternator of John Deere. We have a diverse selection to cater to your needs. Our knowledgeable parts team is at your disposal, ready to assist you every step of the way.