My older Clark CFY40B has seems to be getting stuck around my yard more and more lately. I put chains on...and makes no difference. Sitting on the unit I notice the brake pedal is hard...no compression feeling at all when applying them.
The lift won't roll in nuetral and feels like the brakes are dragging. Sitting in the unit..the tire on the left turns and digs...the tire on the right dosen't move.
Checked all (4) wheels, the steering rears obviously spin freely. The fronts however can't be turned at all by hand, they do move slightly (kind of a click right and left, but that's all).
Never worked on forklift brakes (all automotive)...so when an automotive brake locks up...there is no movement at all because the pads secure the drum or rotor. I have never seen an auto's master cylinder lock in the compressed postion.
In this case it appears that the braking system is inside the axle? The transmission works fine..nuetral and all gears high/low.
I just have a feeling that the master cylinder ram piston is locked in a compressed position...because the compression rod travels about half way inside the cylinder..then justs stops abruptly (and is very hard.. no further movement)
Just guessing my next step would be to remove the "out line" on the master cylinder...if the brakes release..bad cylinder??
Questions: Anyone run into this? Is there a parking brake or "line lock" on this Clark? I don't see either...I would think a parking brakes would be an OSHA requirement?
thanks
Ed
After I posted this here...I found the "tech section" and posted it there also. Sorry..
Showing items 1 - 4 of 4 results.
Thanks all for the responses. As I mentioned..it is a bad master cylinder. Figured that out because when I parked it the wheels wouldn't turn. Got up in the morning and they were free...indicating that the master cylinder backed down some overnight.
I am confident that Helmar has the cylinder...thanks again.
Ed
I think SMH has the parts most likely, as should a Clark dealer or Clark in Louisville Kentucky. you might try searching google for "Clark Material Handling", or ask the parts department at your local (**** near any brand) forklift dealer.
I am not clear on if "you have one wheel that turns" or not, but you should be able to feel some (+/- 1/16th of an inch 'jiggle') "free-play" in the linkage/actuator shaft -at- the master cylinder when the pedal is released. It is possible to have this shaft over adjusted and not have any relief/return of fluid from wheel cylinders to master cylinder reservoir. this has the effect of having free-play in the pedal linkage, but locked down brakes.
You might check and older parts store.I have located lots of master and wheel cylinders there.Also check e bay as they have some forklift parts floating there.Might get lucky.
The problem is the master cylinder..seals swelled up. Cylinder looks new..suspect the brake fluid was contaminated.
Where can I locate a rebuild kit?
Wagner Lockheed # FD 6656 (1" bore)
Ed
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