ACMOC
Login | Register
ACMOC
D6C not charging

D6C not charging

Showing 1 to 8 of 8 results
greengiant
Topic Author
Offline
Member
Send a private message to greengiant
Posts: 227
Thank you received: 0
The new alternator shows around 30 v at the terminal with the engine running.
The batteries show around 22.6 v whether engine is running or not.
I get 22.6 on both sides of the ammeter whether engine is running or not.
The ammeter shows discharge when heating or starting but 0 when the engine is running.
the 2 fuses are good and the alternator is well-grounded.
I don't see a voltage regulator in the diagram or on the machine,
What am I overlooking??
Thanks!
 
Please log in or create an account to join the conversation.
Fri, Aug 30, 2024 8:30 AM
neil
Offline
Admin
Send a private message to neil
Posts: 6,912
Thank you received: 0
Check continuity between the battery wire terminal on the alternator to the battery post - you may need to disconnect some items to isolate the circuit for testing. You can also temporarily run a wire between the alternator and direct to the battery while the engine is running to see if it picks up the charge. Use a clamp meter to check amps
Please log in or create an account to join the conversation.
Fri, Aug 30, 2024 7:56 PM
greengiant
Topic Author
Offline
Member
Send a private message to greengiant
Posts: 227
Thank you received: 0
Reply to neil:
Check continuity between the battery wire terminal on the alternator to the battery post - you may need to disconnect some items to isolate the circuit for testing. You can also temporarily run a wire between the alternator and direct to the battery while the engine is running to see if it picks up the charge. Use a clamp meter to check amps
thanks Neil, I will do that this weekend. i suppose it''s possible that the previous owner did some re-wiring. The ammeter has shown no charge since I got it and i've been charging from an external charger.
Please log in or create an account to join the conversation.
Fri, Aug 30, 2024 10:13 PM
daron
Offline
Member
Send a private message to daron
Posts: 605
Thank you received: 0
Reply to greengiant:
thanks Neil, I will do that this weekend. i suppose it''s possible that the previous owner did some re-wiring. The ammeter has shown no charge since I got it and i've been charging from an external charger.
Neil (and Greengiant)-

A clamp on ampmeter works on AC not DC.

Daron
Please log in or create an account to join the conversation.
Sat, Aug 31, 2024 11:50 AM
neil
Offline
Admin
Send a private message to neil
Posts: 6,912
Thank you received: 0
Reply to daron:
Neil (and Greengiant)-

A clamp on ampmeter works on AC not DC.

Daron
Oh ok, thanks Daron, I didn't know that. Based on that GG, you can hook your direct wire up to the ammeter and use that to bypass the rest of the wiring if it's determined that the continuity is no good
Please log in or create an account to join the conversation.
Sat, Aug 31, 2024 5:02 PM
PhilC
Offline
Member
Send a private message to PhilC
Posts: 665
Thank you received: 0
Reply to daron:
Neil (and Greengiant)-

A clamp on ampmeter works on AC not DC.

Daron
Check the specs of your clamp meter to see if it does DC or not. My fluke one does both.
Please log in or create an account to join the conversation.
Sun, Sep 1, 2024 4:46 PM
greengiant
Topic Author
Offline
Member
Send a private message to greengiant
Posts: 227
Thank you received: 0
Reply to PhilC:
Check the specs of your clamp meter to see if it does DC or not. My fluke one does both.
It was indeed a continuity problem... but in a perplexing way. 2 wires that are hooked together come off the alternator. they go through a conduit, one to the heat/start, the other to the lights. there was no continuity on the one to heat/start. it's puzzling how one heavy wire in the conduit could be broken. I unhooked the one going to the lights and hooked it to the breaker and it's charging normally. 25-26 volts at the batteries and i have a little dc current meter that shows it's charging, not a clamp on, just hold it in proximity to the wire.
the ammeter doesn't show charging, which means i should have hooked it to the ammeter instead of the breaker ( didn't see Phil's post until now, but it's such a hairy tight place to work that i'm going to leave that for another day. ditto with the lights. i don't use them anyway. just so glad to have it charging.
thanks everyone!
Please log in or create an account to join the conversation.
Mon, Sep 2, 2024 6:00 AM
trainzkid88
Offline
Member
Send a private message to trainzkid88
Posts: 2,189
Thank you received: 1
Reply to neil:
Oh ok, thanks Daron, I didn't know that. Based on that GG, you can hook your direct wire up to the ammeter and use that to bypass the rest of the wiring if it's determined that the continuity is no good
I've had fun with broken wires that didn't look broken. and still delivered the "right" voltage but were not providing it under load. in the end we got a autolec to have a look and his apprentice found it there was a bad spot in the cable that you couldn't see. electrical gremlins are always "fun".

bad earths cause many problems. check they are clean and firmly tightened. a smear of conductive grease helps. hell a light smear of any grease helps prevent corrosion.

this is a tip with multiple batteries you want to link across the batteries so your leads go to opposite ends of the battery bank so it think its one big battery. so for a 24v bank you use the positive on one battery and the negative on the other. also have any linking wires the same length so you get even current flow like water power follows the path of least resistance usually that's the shorter/heavier wire
Please log in or create an account to join the conversation.
Mon, Sep 2, 2024 7:08 AM
neil
Offline
Admin
Send a private message to neil
Posts: 6,912
Thank you received: 0
Reply to trainzkid88:
I've had fun with broken wires that didn't look broken. and still delivered the "right" voltage but were not providing it under load. in the end we got a autolec to have a look and his apprentice found it there was a bad spot in the cable that you couldn't see. electrical gremlins are always "fun".

bad earths cause many problems. check they are clean and firmly tightened. a smear of conductive grease helps. hell a light smear of any grease helps prevent corrosion.

this is a tip with multiple batteries you want to link across the batteries so your leads go to opposite ends of the battery bank so it think its one big battery. so for a 24v bank you use the positive on one battery and the negative on the other. also have any linking wires the same length so you get even current flow like water power follows the path of least resistance usually that's the shorter/heavier wire
I had sketchy wiring on my trailer and I figured that it would take less time and cause less frustration to rewire the whole trailer rather than try to track down each poor connection and broken wire. Best $150 I spent I'm sure
Please log in or create an account to join the conversation.
Mon, Sep 2, 2024 7:34 PM
Showing 1 to 8 of 8 results
YouTube Video Placeholder

Follow Us on Social Media

Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.

Upcoming Events

KORUMBURRA WORKING HORSE & TRACTOR & 100 YEARS OF CAT RALLY

Chapter Nineteen

| 5875 STH GIPPSLAND HWY, NYORA

Booleroo 2025

Chapter Thirty

| Booleroo Centre, 54 Arthur St, Booleroo Centre SA 5482, Australia

CAFES 2025 TULARE, CALIFORNIA

Chapter Fifteen

| Tulare, California

Wheatlands Warracknabeal Easter Rally

Chapter Nineteen

| 34 Henty Hwy, Warracknabeal
View Calendar
ACMOC

Antique Caterpillar
Machinery Owners Club

1115 Madison St NE # 1117
Salem, OR 97301

[email protected]

Terms & Privacy
Website developed by AdCo

Testimonials

"I became a member recently because the wealth of knowledge here is priceless." 
-Chris R

Join Today!