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Volvo N12 clutch pedal stuck up
7 years 11 months ago #170497
by Erik
Volvo N12 clutch pedal stuck up was created by Erik
Hi All, I am looking at a 1975 N12 tandem drive tipper. Not sure what the gearbox is. The clutch pedal is stuck up, very hard. No give at all, but the gears go into gear OK with the motor not running.
Any ideas on the like culprit, before I call a mechanic? Is it just a dud slave cylinder or is the fork in the bell housing likely to have come adrift?
Thanks, Erik
Any ideas on the like culprit, before I call a mechanic? Is it just a dud slave cylinder or is the fork in the bell housing likely to have come adrift?
Thanks, Erik
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7 years 11 months ago #170498
by d23j
Replied by d23j on topic Volvo N12 clutch pedal stuck up
If it was a bus the clutch would be stuffed if with the engine running and the peddle goes hard it has run out of linings!
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7 years 11 months ago #170500
by Erik
Replied by Erik on topic Volvo N12 clutch pedal stuck up
Thanks, but that doesn't feel like what it is, but I haven't played with Volvos before.
BTW Did you get my PM?
Erik
BTW Did you get my PM?
Erik
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- Chocs
7 years 11 months ago - 7 years 11 months ago #170501
by Chocs
Replied by Chocs on topic Volvo N12 clutch pedal stuck up
From memory I thought they had an air assist gadget on them.
Cant remember whether the air moved the hydraulic or the other way round.
Maybe there is a clevis seized there somewhere?
Would have thought they had a 16sp zf in them originally but many were turfed out and a roadranger fitted.
The cabovers had a swith on the stick and another on the dash.
Could well be wrong though...its a long time ago
chocs
Cant remember whether the air moved the hydraulic or the other way round.
Maybe there is a clevis seized there somewhere?
Would have thought they had a 16sp zf in them originally but many were turfed out and a roadranger fitted.
The cabovers had a swith on the stick and another on the dash.
Could well be wrong though...its a long time ago
chocs
Last edit: 7 years 11 months ago by Chocs. Reason: forgot a bit
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7 years 11 months ago #170502
by Erik
Replied by Erik on topic Volvo N12 clutch pedal stuck up
Hmm, there are massive air leaks, because the guy has pinched some airlines for another truck, so perhaps you are onto something? Anyone else know?
Erik
Erik
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7 years 11 months ago #170503
by 235mack
Replied by 235mack on topic Volvo N12 clutch pedal stuck up
We really need the Volvo expert to answer this question. Were are you Swishy? :evil: :evil:
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- Chocs
7 years 11 months ago #170504
by Chocs
Replied by Chocs on topic Volvo N12 clutch pedal stuck up
If you know are lines are missing...might be an idea to reinstate them and get the air system up into the green?
Maybe get the mechanic out for a few hours if you are unsure of the workings;
Maybe get the mechanic out for a few hours if you are unsure of the workings;
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7 years 11 months ago #170506
by Zuffen
Replied by Zuffen on topic Volvo N12 clutch pedal stuck up
I pulled a gearbox out of an N12 and replaced it last year. It was rebuilt when it didn't need it as there was an electrical issue that wasn't diagnosed too well.
There is an air cylinder in the bellhousing that operates the clutch.
I'd take Chocs advice and replace the airlines and see how it is then.
There is an air cylinder in the bellhousing that operates the clutch.
I'd take Chocs advice and replace the airlines and see how it is then.
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7 years 11 months ago - 7 years 11 months ago #170508
by Swishy
OF ALL THE THINGS EYE MISS ................. EYE MISS MY MIND THE MOST
There's more WORTH in KENWORTH
Replied by Swishy on topic Volvo N12 clutch pedal stuck up
OF ALL THE THINGS EYE MISS ................. EYE MISS MY MIND THE MOST
There's more WORTH in KENWORTH
Last edit: 7 years 11 months ago by Swishy.
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7 years 11 months ago #170510
by d23j
Replied by d23j on topic Volvo N12 clutch pedal stuck up
Now we are getting there, they are hydraulic controlled air clutch, so no air no clutch and the pedal will be rock hard
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