stiffy.....clutch pedal

13 posts / 0 new
Last post
pkw2704
pkw2704's picture
Offline
Last seen: 1 hour 53 min ago
Joined: 03/02/2021
stiffy.....clutch pedal

ok ,so still learning about the car ,clutch pedal feels stiff/heavy.I am going to replace the cable with new from Chris / redline.if this fails any other causes?? I really hope its the cable

7 wonders of th...
Offline
Last seen: 13 hours 51 min ago
Joined: 17/04/2014

could you remind what model please...?

pkw2704
pkw2704's picture
Offline
Last seen: 1 hour 53 min ago
Joined: 03/02/2021

sorry, 1.8K to 6 speed 2005

7 wonders of th...
Offline
Last seen: 13 hours 51 min ago
Joined: 17/04/2014

It's worth taking the pedal box cover off and seeing how the top adjuster has been set - it needs to be set with as little outer cable the threaded portion protruding into the pedal box as possible as this permits the inner cable to chaf against it on every stroke removing the nylon sleave then wearing thro the steel wires until it get really stiff and snaps.

the adjustment should be made on the other end.

pkw2704
pkw2704's picture
Offline
Last seen: 1 hour 53 min ago
Joined: 03/02/2021

cheers ,

when adjusting do i need to set a slight load on the clutch release bearing? or leave just slack not touching?

hopefully chris at redline will have the part,will fit the new and if it fixes the issue will  keep the other for emergencies 

Wrightpayne
Wrightpayne's picture
Offline
Last seen: 19 min 10 sec ago
Joined: 17/04/2014

Not specifically related to a heavy pedal, but this is worth a read. I dont think the springs are still available from Caterham.

https://www.lotus7.club/guides/maintenance/pre-loading-clutch-release-bearing-crb-cable-clutches

timb2117
timb2117's picture
Offline
Last seen: 6 hours 40 min ago
Joined: 26/04/2020

MIne from Chris had 74515 on the bag (part number?) 2005 1800 K' and its smooth as silk, I did mount a spring but set it to be with just a couple of mm free movement prior to firming up, seems to be running fine like that....

Sounds to me either your curve of the cable arc is too tight, kinked or more likely its chafing.

pkw2704
pkw2704's picture
Offline
Last seen: 1 hour 53 min ago
Joined: 03/02/2021

cable ordered from Chris,hopefully does the trick,will look at the spring thing

Piers300
Piers300's picture
Offline
Last seen: 18 hours 5 min ago
Joined: 17/04/2014

I always carry a spare clutch cable and throttle cable.

Over 11 years on my 1.8K, I've had three clutch cables break when out and about. All snapped at the peddle box end where the cable is crimped to the union.

Piers

John Vine
John Vine's picture
Online
Last seen: 1 min 21 sec ago
Joined: 17/04/2014

Re #4:

Good advice. The Assembly Guide says:

36 The clutch cable is fitted with adjusters at both ends so that it can be adjusted at both the bell-housing and pedal box. Set the pedal box end so that a minimum length of outer cable protrudes past the locating bush into the pedal box then adjust at the bell-housing end until a satisfactory clutch pedal position is achieved (4 threads showing through the yellow bush is a good starting point). The clutch 'bite' point should be set according to personal preference ensuring that it is not adjusted so as to prevent the clutch from fully engaging or disengaging.

Re #5:

...when adjusting do i need to set a slight load on the clutch release bearing?

Yes, a pre-load is essential, but you're unlikely to reach the required load just by adjusting the cable.  Ideally, you need some supplementary springs (#6 refers to my pre-load guide).  I'm told that neither CC nor Redline stock the CQ13 springs that I describe.  I'm not aware of a direct alternative, I'm afraid.

JV

 

pkw2704
pkw2704's picture
Offline
Last seen: 1 hour 53 min ago
Joined: 03/02/2021

Update , new cable fitted and lots better. My concern now is if I should have the vvc  version. It's still a tight curve and the pedal end thread rubs on the inlet manifold which is cast alloy one same as the vvc?