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I have a 1989 Toyota Pickup 2wd w/manual transmission. I suspect that the hydraulic lines from the clutch master cylinder is leaking where it goes into the transmission. Where is this located?
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Most likely the hydraulic line wasn't properly installed on the clutch slave cylinder or master cylinder, causing a leak. If the fitting was cross-threaded, it may have damaged either the hydraulic line fitting or the cylinder it goes into. Have whoever did the work fix this at their cost.
If you mean you step on the clutch, put transmission in gear and release clutch with no engagement (pedal returns to top position) there is a good chance your clutch disc or pressure plate, or both are worn out and need replacing.
If your clutch pedal is going to the floor and not returning there could be a leak in the system, a bad clutch master cylinder or a bad slave cylinder on the transmission. Check the fluid level in the clutch master cylinder. If it is low or empty you have a leak or component failure. Visually inspect clutch master, line, slave cylinder for fluid leaks. replace as needed. If hydraulics are o.k., suspect clutch disc/pressure plate.
sounds to me like the clutch master cylinder might be bad usually this happens when the line or the clutch master cylinder leaks fluid and you lose pressure to your clutch pedal...you should have a hydraulic clutch on this truck...if its leaking it will need to be replaced its located under the truck usually on the drivers side mounted on the transmission bell housing...hopes this helps
LEAKING WHAT....THERE IS A COUPLE OF THINGS IT COULD BE ..IF IT LOOKS LIKE OIL IS COMING OUT OF THE TRANSMISSION WHERE THE CLUTCH IS..THEN MORE THAN LIKELY ITSA REAR MAIN SEAL LEAKING..IF ITS A CLEAR HYDRAULIC TYPE FLUID THEN IT COULD EITHER BE YOUR CLUTCH SLAVE CYLINDER ,CLUTCH LINE,AND POSSIBLY A CLUTCH MASTER CYLINDER BUT THE LAST IS LESS LIKELY
The clutch on this vehicle is hydraulicly operated and usually what happens is either the system develops a small leak and loses fluid or the seals inside the master or slave cylinder fail and won't allow enough pressure to build up to release the clutch. Start by checking the clutch master cylinder reservoir fluid level [located under the hood on the drivers side of the firewall] to make sure it is full. It holds only a few ounces of fluid so even a tiny leak will quickly deplete it. You could also have a clutch disc or pressure plate that has failed or fallen apart which would also give you the same symptoms.
The problem could come from the clutch master cylinder or the slave cylinder. The cause could be external or internal.
First check the fluid level in the reservoir. The reservoir could be independent of the brake system or using the same.
If the level is too low, air may have entered in the line and the hydraulic compression is affected. So first, adjust the level in the reservoir using recommended oil. (normally brake oil is ok).
Check for any oil leak starting from the clutch pedal following hydraulic circuit up to the transmission.
Your vehicule should have two clutch cylinders: the master and the slave.
The master cylinder is operated by your clutch pedal, it's located under the dash, fixed to the firewall and connected to the hydraulic line on the other side of the firewall. Check for any leak on the carpet, under the carpet and near the hydraulic connection. Pumping the pedal making that verification could help to detect leak. Then follow the hydraulic line going to the slave cylinder attached to the transmission making a visual inspection for leaks.
If for any reason some air entered the circuit, the line could be purged from air bleeding the slave cyclinder as you do bleeding brake component.
If there is no air, no leak detected then it's probably an internal problem that you can't see. Remove the cap from the reservoir, depress the pedal. If the oil is moving in the reservoir then the master slave is probably bad otherwise I would suspect the slave.
I'm not an Isuzu technician.
Some other Gurus could complement or correct my saying.
Hope it will help
Dan
Add brake fluid to the clutch master cylinder and pump several times. You apparently have a leak somewhere. Probably the line or slave cylinder. Look for damage to the line going from the master to the slave cylinder or fluid around any areas of the system. You will see rust or bubbled paint.
If you are leaking fluid from the clutch master cylinder then you have air in the system. You could try and bleed the air out of the clutch slave cylinder to get the gears but it would not last. The only way is to replace the defective master cylinder, replace all of the fluid and bleed out the air through the slave cylinder.
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