4-speed manual clutch adjustment

1965 - 1972: 250S, 250SE, 300SEb, 280S, 280SE, 280SEL, 280SE 3.5, 280SEL 3.5, 280SE 4.5, 280SEL 4.5, 300SEL, 300SEL 6.3, 300SEL 3.5, 300SEL 4.5
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VFRBoy
C Class
Posts: 26
Joined: Fri 18 Mar, 2016 2:48 pm
Model you own: w108
Region: Victoria
Location: Watsonia Vic

4-speed manual clutch adjustment

Post by VFRBoy » Tue 14 Nov, 2017 11:36 am

Is there a method to adjust the clutch? Take up is happening very close to the floor and thus not completely disengaging and shifting is difficult.

So for now I'm getting by with a bit of heel and toe on the downshift, and putting it into gear before starting the engine.

Fluid levels are good and no evidence of air in the lines. Otherwise all is well...

Appreciate any guidance!
1966 W108 250S
4-speed floorshift

Carn the Dees...

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Bartman4800
300 SLR
Posts: 1985
Joined: Fri 10 Oct, 2008 12:10 am
Model you own: w111
Location: Perth WA

Re: 4-speed manual clutch adjustment

Post by Bartman4800 » Tue 14 Nov, 2017 12:27 pm

It is a hydraulically operated clutch.

The only thing to adjust is the extension rod on the slave (mounted on the gearbox).
Undo the nut and extend the plunger. Make sure there is 1-2 mm of free play otherwise your throw out bearing will wear very quickly.

Bart
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

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Lance
Adenauer
Posts: 384
Joined: Thu 06 Mar, 2014 9:33 pm
Model you own: w114
Location: Altona Meadows, Melbourne

Re: 4-speed manual clutch adjustment

Post by Lance » Tue 14 Nov, 2017 4:55 pm

On the W114 manual the bolt that connects the actuation rod to the pedal is eccentric. If there is free play as you depresss the pedal then loosen rotate and tighten.
Regards,
Lance Smart

W114 280E 5 speed manual
W123 280E

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Mercmad
Mercedes Demigod
Posts: 8061
Joined: Sun 11 Sep, 2005 8:01 pm
Model you own: w109
Location: Brissy
Contact:

Re: 4-speed manual clutch adjustment

Post by Mercmad » Wed 15 Nov, 2017 5:20 pm

Sounds like the clutch is worn out . you measure the wear by the amount of rod protruding from the slave cylinder . Theres a guage that you place against the rod to determine the wear .

User avatar
VFRBoy
C Class
Posts: 26
Joined: Fri 18 Mar, 2016 2:48 pm
Model you own: w108
Region: Victoria
Location: Watsonia Vic

Re: 4-speed manual clutch adjustment

Post by VFRBoy » Thu 16 Nov, 2017 9:34 am

Thanks for the tips guys - on it!

Is this achievable with a trolley jack and axle stands or is a hoist necessary?
1966 W108 250S
4-speed floorshift

Carn the Dees...

User avatar
Bartman4800
300 SLR
Posts: 1985
Joined: Fri 10 Oct, 2008 12:10 am
Model you own: w111
Location: Perth WA

Re: 4-speed manual clutch adjustment

Post by Bartman4800 » Thu 16 Nov, 2017 10:28 am

To adjust the rod (or measure as Ron said), you need to jack up the car high enough so you can slide underneath.
I put my jack stands on 100 mm timber blocks.

Jack stands are certainly the go, but a hoist is always easier...

Bart
1963 220 Sb Sedan "Kermit" (Australian Assembly)
1960 220 Sb Sedan "Zum Schlachten" (Early German Assembly, with a torsion bar spring for the bonnet) - Stored in Country WA
1981 Subaru Brumby 1.8 with Weber and 5-speed box "little utie" - Sold to another enthusiast!
2006 Ford Focus "daily driver"
2002 VW Passat V6 30V Station Wagon (SOLD - This car into a money pit)
2011 Kia Sportage "Missus commuter Bus"
2002 Mitsubishi Rosa Bus (converting it to a motor home)

User avatar
VFRBoy
C Class
Posts: 26
Joined: Fri 18 Mar, 2016 2:48 pm
Model you own: w108
Region: Victoria
Location: Watsonia Vic

Re: 4-speed manual clutch adjustment

Post by VFRBoy » Mon 20 Nov, 2017 9:43 am

OK the lock nut on the clutch throw rod had come loose.

That's fixed, but now waiting on a seal kit for the master cylinder as it's not pumping enough.
1966 W108 250S
4-speed floorshift

Carn the Dees...

mathuisella
560 SEL
Posts: 596
Joined: Sun 08 Jun, 2014 6:03 am
Model you own: w123
Location: Brisbane, North side.

Re: 4-speed manual clutch adjustment

Post by mathuisella » Thu 22 Nov, 2018 12:16 am

:) how did you go with this ?

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VFRBoy
C Class
Posts: 26
Joined: Fri 18 Mar, 2016 2:48 pm
Model you own: w108
Region: Victoria
Location: Watsonia Vic

Re: 4-speed manual clutch adjustment

Post by VFRBoy » Thu 22 Nov, 2018 12:13 pm

mathuisella wrote:
Thu 22 Nov, 2018 12:16 am
:) how did you go with this ?
I bought a new Master Cylinder, but it turned out the banjo connector thread was the wring size. The bore of the original master cyl was looking pretty fresh so I cleaned it up and used the internals from the new cylinder in it (piston and seals). Gave it a good flush and bleed and all is good. Take up is still a bit low but it works, and the clutch doesn't drag. I think if I had another 1-2mm throw the gear shift would be smoother, particularly selecting 1st, but I can live with it.

Reminds me - anyone want a brand new master cylinder? Needs new piston seal, suit a later W108 (mine's 1966)
1966 W108 250S
4-speed floorshift

Carn the Dees...

mathuisella
560 SEL
Posts: 596
Joined: Sun 08 Jun, 2014 6:03 am
Model you own: w123
Location: Brisbane, North side.

Re: 4-speed manual clutch adjustment

Post by mathuisella » Thu 22 Nov, 2018 3:26 pm

Nice.

I'm having 4 speed manual issues myself at the moment, it feels like the clutch isn't fully disengaging when i press the pedal to the floor... 3rd/4th gear are okay most of the time, but 1st and 2nd are a no go without slowing right down and perfectly rev matching, even double clutching doesn't help

But it was mentioned there was rod adjustment for the slave cylinder ? probably different in my war a w123

https://ozbenz.net/viewtopic.php?f=5&t=25245

User avatar
VFRBoy
C Class
Posts: 26
Joined: Fri 18 Mar, 2016 2:48 pm
Model you own: w108
Region: Victoria
Location: Watsonia Vic

Re: 4-speed manual clutch adjustment

Post by VFRBoy » Thu 22 Nov, 2018 6:09 pm

mathuisella wrote:
Thu 22 Nov, 2018 3:26 pm
rod adjustment for the slave cylinder ?
There is an adjustment on the W108 slave cyl, you would have seen it on yours if it was there when doing your conversion?

Assuming you can engage 1st OK when idling? I'll follow your other thread to stay on topic.

Nice job BTW, that's some persistence.
1966 W108 250S
4-speed floorshift

Carn the Dees...

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