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'75 C-900 Clutch Problem

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Old 05-07-2017, 09:30 PM
acfd acfd is offline
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'75 C-900 Clutch Problem

Took our 1975 C-900 for a ride through town last night and developed a clutch problem. I first noticed the issue when I pressed the clutch in to brake for a stoplight and killed the engine. The pedal seemed to be bleeding off the longer I held the pedal down. Four blocks later I had trouble downshifting for a turn and knew something was up. By the time I made it another 8 blocks the pedal went all the way to the floor. After I backed the truck in (and lots of cussing), I noticed that the truck had left a trail of fluid into the garage. It appears to be coming from the tranny. I suspect that the slave cylinder is my issue, but would appreciate the opinion of others who have more experience with these trucks.

I'm thinking that I should probably rebuild both the slave and master cylinder.

The truck VIN is C91LVW31975. It is has a 534 engine. Any chance anyone knows part numbers for the Master and Slave cylinder rebuild kits?

Thanks,

Brian

Last edited by acfd; 05-07-2017 at 10:09 PM. Reason: typo
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Old 05-07-2017, 11:38 PM
85e150six4mtod 85e150six4mtod is offline
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Leaking slave is most likely the problem. You will see it on the bell, driver side. I will be external to the bell and push on the clutch fork. Depending on back of cab equipment, you may be able to see it without raising the cab.
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Old 05-08-2017, 01:27 PM
acfd acfd is offline
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Perhaps NumberDummy can help out with the part numbers for the master and slave cylinders and their rebuild kits. He has been a huge help in the past...
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Old 05-08-2017, 08:53 PM
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There's a hydraulic line between the clutch master cylinder and slave cylinder. It may be the problem or it could be one or both of the other two.

Part numbers for master cylinder, slave cylinder, kits for both and the line...tomorrow (edit: see next post). I've been on here all day and I'm tired.
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Old 05-09-2017, 08:49 AM
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B9TZ-7A508-A .. Clutch Slave Cylinder / Obsolete

1958/80 C/CT900 401/477/534.

NOS PARTS SOURCE in Olathe KS has 1 = 913-220-5746.

CARPENTER NOS OBSOLETE PARTS in Concord NC has 7 = 800-476-9653.
-----------------------------------------------------------------------------------
B8Q-7560-A .. Clutch Slave Cylinder Repair Kit / Obsolete

1958/80 C/CT900 (gas).

NOS PARTS SOURCE has 1.

CARPENTER NOS OBSOLETE PARTS has 1.

MILLER OBSOLETE PARTS in Binghamton NY has 2 = 607-722-5371.

GREEN SALES CO. in Cincinnati OH has 12 = 800-543-4959.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
D2HZ-7A512-A .. Clutch Master Cylinder to Slave Cylinder Hydraulic Tube / 123" developed length, 1/4" steel tube & rubber hose / Obsolete

1972/86 C/CT900.

No Ford dealer or obsolete parts vendor has any.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C1TT-7A543-G .. Clutch Master Cylinder-Includes Push Rod / Obsolete

1961/86 C/CT600/900.

NOS PARTS SOURCE has 1.

CARPENTER NOS OBSOLETE PARTS has 8.
-----------------------------------------------
B8T-7578-A .. Clutch Master Cylinder Repair Kit / Obsolete

1958/86 C/CT600/900.

CARPENTER NOS OBSOLETE PARTS has 3.

GREEN SALES CO. has 4.

MILLER OBSOLETE PARTS has 4.
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Old 05-09-2017, 05:07 PM
acfd acfd is offline
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Thanks!!!

Thanks!!! As always NumberDummy you are a huge help. These days no one has any parts for a truck that old - at least that's what their computer tells them. Looking something up in a book seems to be a lost art. It is amazing what is out there though if you can give them the part number, and they don't have to look it up.
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