Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 01-15-2019, 04:06 PM   #1
MODELTR
Junior Member
 
Join Date: Oct 2010
Posts: 19
Default Starter hums will not turn engine over.

When I step on the starter it just hums.Will not turn the engine over.Replaced the starter with a rebuilt one same problem.Bench tested it and it works fine.I'm scatching my head.Any ideas?
ThankS
Tom
MODELTR is offline   Reply With Quote
Old 01-15-2019, 04:08 PM   #2
WHN
Senior Member
 
Join Date: Mar 2017
Location: Old Lyme Connecticut
Posts: 905
Default Re: Starter hums will not turn engine over.

Did you use the same Bendix on the second starter?
WHN is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 01-15-2019, 04:14 PM   #3
Charlie Stephens
Senior Member
 
Join Date: May 2010
Location: Southern California
Posts: 5,821
Default Re: Starter hums will not turn engine over.

Have you tried using the hand crank?

Charlie Stephens
Charlie Stephens is offline   Reply With Quote
Old 01-15-2019, 04:54 PM   #4
Gary WA
Senior Member
 
Gary WA's Avatar
 
Join Date: May 2010
Location: Clinton,WA/Whidbey Island
Posts: 2,767
Default Re: Starter hums will not turn engine over.

low voltage battery,or ground
__________________
www.whidbeymodelaclub.com
Gary WA is offline   Reply With Quote
Old 01-15-2019, 05:02 PM   #5
Benson
Senior Member
 
Benson's Avatar
 
Join Date: May 2010
Posts: 1,755
Default Re: Starter hums will not turn engine over.

IF temperature is below 40 or so AND the bendix was greased instead of light oil (think "3 In One Oil") it will not engage and just spin starter.

The thicker the grease the higher the temperature!

1. Clean grease off with solvent.

2. Blow dry.

3. Oil with light oil.
__________________
_____________________________________

Last edited by Benson; 01-15-2019 at 05:11 PM.
Benson is offline   Reply With Quote
Old 01-15-2019, 07:12 PM   #6
Terry, NJ
Senior Member
 
Terry, NJ's Avatar
 
Join Date: May 2010
Location: Bucks Co, Pa
Posts: 3,300
Default Re: Starter hums will not turn engine over.

It's a little hard to "diagnose at a distance" however, if it won't engage with the flywheel, you an bet on the the problem being with the Bendix. When you say, "it worked perectly when you had it out of the car and tried it, did the Bendix move on it's shaft to engage the flywheel and return? Is it free? Because of a bad experience I had many years ago with grease , oil and a stuck Bendix, I prefer to oil it and wipe ALL the oil off till it's almost dry, or even dry. It's the most natural thing to lubricate! It seems to cry out for grease or oil. Don't do it! Even light oils can stop it from sliding. Generally speaking, a Bendix doesn't require any maintenance beyond checking the 3/8 bolts that secure it to the shaft. These are sometimes a problem.
Terry



Quote:
Originally Posted by Benson View Post
IF temperature is below 40 or so AND the bendix was greased instead of light oil (think "3 In One Oil") it will not engage and just spin starter.

The thicker the grease the higher the temperature!

1. Clean grease off with solvent.

2. Blow dry.

3. Oil with light oil.
Terry, NJ is offline   Reply With Quote
Old 01-15-2019, 11:50 PM   #7
Chuck Sea/Tac
Senior Member
 
Chuck Sea/Tac's Avatar
 
Join Date: May 2010
Location: Between Seattle & Tacoma
Posts: 1,653
Default Re: Starter hums will not turn engine over.

As mentioned, can you turn the engine by hand?
And also what’s your battery.voltage? At rest and when starters engaged.

Last edited by Chuck Sea/Tac; 01-15-2019 at 11:58 PM.
Chuck Sea/Tac is offline   Reply With Quote
Old 01-16-2019, 10:35 AM   #8
DD931
Senior Member
 
DD931's Avatar
 
Join Date: May 2010
Location: PA Poconos
Posts: 628
Default Re: Starter hums will not turn engine over.

I was always taught that the Bendix screw shaft should be totally dry. Any lubrication will just slow down the gear moving down the screw. Seems counter-intuitive, but it's worked for me for 60 years!! I've never seen a Bendix drive that was worn in that area.
DD931 is offline   Reply With Quote
Old 01-16-2019, 11:07 AM   #9
katy
Senior Member
 
katy's Avatar
 
Join Date: Jun 2015
Location: Alberta, Canada
Posts: 1,640
Default Re: Starter hums will not turn engine over.

Quote:
Originally Posted by MODELTR View Post
When I step on the starter it just hums.Will not turn the engine over.Replaced the starter with a rebuilt one same problem.Bench tested it and it works fine.I'm scatching my head.Any ideas?
ThankS
Tom
Sounds like a poor ground to the engine.
__________________
Talk slow, think fast.
katy is offline   Reply With Quote
Old 01-16-2019, 03:02 PM   #10
1931 flamingo
Senior Member
 
1931 flamingo's Avatar
 
Join Date: May 2010
Location: new britain,ct 06052
Posts: 7,807
Default Re: Starter hums will not turn engine over.

Are you missing teeth on the ring gear??
Paul in CT
1931 flamingo is offline   Reply With Quote
Old 01-16-2019, 03:43 PM   #11
Purdy Swoft
Senior Member
 
Purdy Swoft's Avatar
 
Join Date: May 2010
Location: Alabama
Posts: 6,849
Default Re: Starter hums will not turn engine over.

Quote:
Originally Posted by DD931 View Post
I was always taught that the Bendix screw shaft should be totally dry. Any lubrication will just slow down the gear moving down the screw. Seems counter-intuitive, but it's worked for me for 60 years!! I've never seen a Bendix drive that was worn in that area.

Same here . I have also found that it is best not to use any lubrication on the helix of the Bendix . I once sprayed WD 40 on the Bendix of our 31 tudor . It was winter and the sedan cranked fine the first time . I drove to the nearest gas station and gassed up . When I got ready to leave , the sedan wouldn't start. The Bendix wouldn't engage, the starter motor would just spin . Its a good thing that I had a hand crank under the seat . When I got back to the shop , I removed the starter and washed the starter drive in lacquer thinner to remove any traces of oil and all was well .
Purdy Swoft is offline   Reply With Quote
Old 01-16-2019, 03:45 PM   #12
Seth Swoboda
Senior Member
 
Seth Swoboda's Avatar
 
Join Date: May 2010
Location: Southern Illinois
Posts: 2,595
Default Re: Starter hums will not turn engine over.

I would check the ground. If the ground is bad you will have the problems you indicated. Run a jumper cable from the battery to the frame and see if the starter motor will turn over.

Last edited by Seth Swoboda; 01-16-2019 at 03:46 PM. Reason: spelling
Seth Swoboda is offline   Reply With Quote
Old 01-16-2019, 03:49 PM   #13
Dave Castle
Senior Member
 
Dave Castle's Avatar
 
Join Date: Jun 2017
Location: Carmel, Ca
Posts: 226
Default Re: Starter hums will not turn engine over.

So it does not know the words ?
__________________
"If you do not want to hear the answer, don't ask the question!"
Dave Castle is offline   Reply With Quote
Old 01-16-2019, 04:33 PM   #14
abachman3
Senior Member
 
abachman3's Avatar
 
Join Date: Jun 2013
Location: Western Springs, IL
Posts: 168
Default Re: Starter hums will not turn engine over.

And the starter bolts are correct, not too long?
abachman3 is offline   Reply With Quote
Old 01-16-2019, 04:39 PM   #15
J Franklin
Senior Member
 
J Franklin's Avatar
 
Join Date: May 2010
Location: oregon
Posts: 3,589
Default Re: Starter hums will not turn engine over.

Quote:
Originally Posted by Dave Castle View Post
So it does not know the words ?
Come on! Come on! Drat Please Start!
J Franklin is offline   Reply With Quote
Old 01-16-2019, 05:59 PM   #16
woofa.express
Senior Member
 
woofa.express's Avatar
 
Join Date: Jan 2018
Location: Tocumwal, NSW, Australia
Posts: 649
Default Re: Starter hums will not turn engine over.

Starter motor.
I too had that problem however the reason may well have been different. I was running a 6V starter in a 12v conversion and was concerned about the severe impact that was made on engagement. I converted the starter to12V by changing the field coils. It made 1 start and I was delighted at the moderate even gentle engagement. That was it, the only start I got. I removed the starter and figured the bendix had become jammed too tightly in the home position.So had it ground plus put steel spacer washers on shaft to prevent it going all the way home and jamming. Again got 1 start. I then figured the double voltage had caused the armature to spin so fast that this situation didnít develop. I am now about to change the armature for a 5/8 shaft with a new bendix retaining my new field coils.
There is a new type of starter which costs about the same as Iíve spent so far and mostly wasted. I did not know of it when all of this started. Pun unintentional.
__________________
I know many things,
But I don't know everything,
Sometimes I forget things.
woofa.express is offline   Reply With Quote
Old 01-16-2019, 07:17 PM   #17
100IH
Senior Member
 
Join Date: Dec 2011
Location: SW Idaho
Posts: 806
Default Re: Starter hums will not turn engine over.

Good grief, since the starter ran on the bench, the next point to check is the engine. Is it locked up or extremely tight. Push in 3rd gear, key off.
100IH is offline   Reply With Quote
Old 01-16-2019, 07:35 PM   #18
WHN
Senior Member
 
Join Date: Mar 2017
Location: Old Lyme Connecticut
Posts: 905
Default Re: Starter hums will not turn engine over.

Quote:
Originally Posted by WHN View Post
Did you use the same Bendix on the second starter?
I would think that if two different starters both spin outside the car and than again in the car but do not engage the flywheel. Your bendix is mostlikely the first place to check. They do need replacing from time to time.

Only three things could be wrong, starter, bendix, or flywheel teeth. If you crank the engine over just a bit, it will move the flywheel to a different set of teeth. Than try to start car.
WHN is offline   Reply With Quote
Old 01-16-2019, 08:34 PM   #19
TerryO
Senior Member
 
TerryO's Avatar
 
Join Date: May 2010
Location: N. GA
Posts: 192
Default Re: Starter hums will not turn engine over.

Totally unrelated I know, but I had a similar issue with my Cub Cadet. The battery tested good and had 13.7 volts but the starter drive wouldn't engage (starter would spin). Mine also worked ok on the bench. This had been an on and off issue for several months so last week I decided to fix it. I thought I'd start with a new battery before ordering a new starter and presto, it starts like it did when new. You may just have a bad battery even if it reads good voltage. Maybe worth trying a different battery if your grounds are good.



TerryO
TerryO is offline   Reply With Quote
Old 01-16-2019, 09:23 PM   #20
Fred K-OR
Senior Member
 
Fred K-OR's Avatar
 
Join Date: May 2010
Location: Stayton, Oregon
Posts: 3,773
Default Re: Starter hums will not turn engine over.

[QUOTE=Gary WA;1716550]low voltage battery,or ground[/QUOTE


I second this!
__________________
Fred Kroon
1929 Std Coupe
1929 Huckster
Fred K-OR is offline   Reply With Quote
Old 01-16-2019, 09:27 PM   #21
Fred K-OR
Senior Member
 
Fred K-OR's Avatar
 
Join Date: May 2010
Location: Stayton, Oregon
Posts: 3,773
Default Re: Starter hums will not turn engine over.

May also be a bad starter switch.
__________________
Fred Kroon
1929 Std Coupe
1929 Huckster
Fred K-OR is offline   Reply With Quote
Old 01-17-2019, 09:11 AM   #22
ryanheacox
Senior Member
 
ryanheacox's Avatar
 
Join Date: Apr 2013
Location: Northwest CT
Posts: 305
Default Re: Starter hums will not turn engine over.

Quote:
Originally Posted by Terry, NJ View Post
It's a little hard to "diagnose at a distance" however, if it won't engage with the flywheel, you an bet on the the problem being with the Bendix. When you say, "it worked perectly when you had it out of the car and tried it, did the Bendix move on it's shaft to engage the flywheel and return? Is it free? Because of a bad experience I had many years ago with grease , oil and a stuck Bendix, I prefer to oil it and wipe ALL the oil off till it's almost dry, or even dry. It's the most natural thing to lubricate! It seems to cry out for grease or oil. Don't do it! Even light oils can stop it from sliding. Generally speaking, a Bendix doesn't require any maintenance beyond checking the 3/8 bolts that secure it to the shaft. These are sometimes a problem.
Terry
I'm going to third this idea. When reassembling my bendix I naturally assumed that it needed lube so I smeared on some lithium grease... bad idea. Mine still engages in cold temps after bliping the starter a few times but it will come out in the spring and get cleaned up.
ryanheacox is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 01-17-2019, 09:27 AM   #23
TerryO
Senior Member
 
TerryO's Avatar
 
Join Date: May 2010
Location: N. GA
Posts: 192
Default Re: Starter hums will not turn engine over.

https://www.fordbarn.com/forum/showthread.php?t=257702
TerryO is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 10:43 AM.