Author Topic: Testing the door claw  (Read 248 times)

Offline Jcparmley

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Testing the door claw
« on: December 06, 2018, 11:31:03 AM »
Does anyone know how to test the door claw on a mci102c3? I don't think mine is working.  I have never seen it work. 

Offline lostagain

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Re: Testing the door claw
« Reply #1 on: December 06, 2018, 11:50:23 AM »
With ignition on and air above 90 psi, you can open and close it with the red button under the dash that is the emergency door  overrule opener/unlocker.

JC
JC
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1977 MC5C, 6V92/HT740

Offline buswarrior

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Re: Testing the door claw
« Reply #2 on: December 06, 2018, 12:47:51 PM »
To clarify, the door handle/arm has to be closed to satisfy the circuit.

The claw will not usually operate with the door open.

Happy coaching!
Buswarrior
Frozen North, Greater Toronto Area

Offline Jcparmley

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Re: Testing the door claw
« Reply #3 on: December 06, 2018, 04:16:23 PM »
Yes, the door is shut.  I do not see the claw engage.  I was wondering if there was a way to manually operate the claw to see if it is working or moving freely. 


To clarify, the door handle/arm has to be closed to satisfy the circuit.

The claw will not usually operate with the door open.

Happy coaching!
Buswarrior

Offline buswarrior

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Re: Testing the door claw
« Reply #4 on: December 06, 2018, 04:59:02 PM »
The air cylinder has a strong return spring in it, you won't readily get enough leverage.

First, crack the airline on the emergency release to be sure you have air pressure up to that point, then you have to follow the airline to the activating valve on the door handle linkage.

Something behind the dash is out of alignment, broken or rusted off...

It "just works" whenever you click the handle in and out of the fully locked position.

Happy coaching!
Buswarrior

Frozen North, Greater Toronto Area

Online lvmci

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Re: Testing the door claw
« Reply #5 on: December 06, 2018, 08:52:11 PM »
Hi Jcp, is your door open/close rocker switch to close? Red knob up? lvmci...
MCI 102C3 8V92, Allison HT740
Formally MCI5A 8V71 Allison MT643

Offline Jcparmley

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Re: Testing the door claw
« Reply #6 on: December 06, 2018, 09:01:08 PM »
Yes, it is in the up position and I make sure the door is closed as far as it will go with the dash switch. 

Hi Jcp, is your door open/close rocker switch to close? Red knob up? lvmci...

Offline scott332

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Re: Testing the door claw
« Reply #7 on: December 07, 2018, 05:48:40 AM »
On my MC-12 the if the transmission is in neutral the claw opens.  The door must be closed, knob under dash in the correct position, and transmission in gear to get it to operate. 
1992 MCI MC-12
1956 GMC PD4501-805

Offline buswarrior

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Re: Testing the door claw
« Reply #8 on: December 07, 2018, 07:22:59 AM »
GEEZ... the transmission interlocked... what a pain!!

What transmission is this?

Maybe a one off? The modern day MCI continue to have the air locks just be related to the door being fully closed.

Happy coaching!
Buswarrior
Frozen North, Greater Toronto Area

Offline Jcparmley

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Re: Testing the door claw
« Reply #9 on: December 07, 2018, 08:19:58 AM »
I will check that today.  That would be interesting if that was it.  Thanks

On my MC-12 the if the transmission is in neutral the claw opens.  The door must be closed, knob under dash in the correct position, and transmission in gear to get it to operate.

Offline edvanland

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Re: Testing the door claw
« Reply #10 on: December 07, 2018, 08:56:11 AM »
On my MCI 7 I can hear it engage and actually see the door come in about a 1/4 inch.
Ed Van
MCI 7
Cornville, AZ