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10-19-09, 10:20 AM
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#1 (permalink)
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Forum Regular
Join Date: Dec 2007
Location: Holland, Mi
Posts: 58
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slave cylinder always going bad?
I have a 1972 FJ40 3 speed manual. Everytime I go wheeling my slave cylinder goes out. I believe the cylinder is the orginal, maybe not, but 3 times in one summer. What should I do?
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10-19-09, 10:26 AM
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#2 (permalink)
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450,000+ mile club
Join Date: Jun 2005
Posts: 4,831
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are you rebuilding it each time...or buying new one each time?
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10-19-09, 11:01 AM
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#3 (permalink)
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Site Addict
Join Date: Feb 2004
Location: Monroe, WA
Posts: 1,443
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Since replacement cylinders (and even rebuild kits) for the early slave cylinder are difficult to come by from local parts stores, there is a good chance it was replaced with a later slave. It all bolts up and works fine, but the bore is smaller. Sombine a smaller bore with the big-bore master cylinder, and you have the potential to over-extend the slave and blow out the seal.
I would check that before you get any further with replacing or rebuilding parts.
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-Eric
64 FJ40, slightly modified.
96 LX450, locked. 
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10-19-09, 11:26 AM
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#4 (permalink)
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Forum Regular
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Quote:
Originally Posted by mybluetoy
I have a 1972 FJ40 3 speed manual. Everytime I go wheeling my slave cylinder goes out. I believe the cylinder is the orginal, maybe not, but 3 times in one summer. What should I do?
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Quote:
Originally Posted by JohnnyC
are you rebuilding it each time...or buying new one each time?
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Rebuilding.
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10-19-09, 11:42 AM
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#5 (permalink)
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Site Addict
Join Date: Nov 2004
Location: MD
Posts: 1,452
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Buy oem from toyota. Also have on hand a master if it goes. My 1977 slave went out on the trail in '03 and I put a new oem mc and slave in it. As I recall, they weren't all that much $. Done deal, no problems since. I always carry a spare new oem slave just in case, but haven't had to use it.
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'77 FJ40: HFS, 33's, Locked and Low'd 
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10-19-09, 04:36 PM
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#6 (permalink)
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250+ Club
Join Date: Sep 2005
Location: Russellville, Arkansas
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If you find you have the original MC & Slave cylinder, it may be a good idea to hone the cylinder for a few minutes with brake fluid before reassembly. When i started doing this, I found out my slave cylinder seems to last longer.
ty
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'79 Pig-"Inoshishi"
'69 FJ40-"Da Roofless one"
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10-19-09, 05:27 PM
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#7 (permalink)
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Site Addict
Join Date: Jun 2007
Location: Whittier, Calif.
TLCA# Associate Member/Sponsor
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A. Avoid Chinese
B. Don't mis-match with Toyota, get exact for your year!!!
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Downey's gone,
Jim isn't!!!
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10-20-09, 07:57 AM
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#8 (permalink)
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Forum Regular
Join Date: Dec 2007
Location: Holland, Mi
Posts: 58
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The title says 1972 but the stamp on the vehicle says 1971. Which year should I go by?
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10-20-09, 08:10 AM
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#9 (permalink)
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450,000+ mile club
Join Date: Jun 2005
Posts: 4,831
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71-72 are the same:
31470-60021
ToyoDIY.com
Item Number MSRP Core Price Price
3147060021 $58.14 $0.00 $46.51
CYLINDER ASSY, CLUTC
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10-20-09, 03:19 PM
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#10 (permalink)
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Forum Regular
Join Date: Dec 2007
Location: Holland, Mi
Posts: 58
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Quote:
Originally Posted by JohnnyC
71-72 are the same:
31470-60021
ToyoDIY.com
Item Number MSRP Core Price Price
3147060021 $58.14 $0.00 $46.51
CYLINDER ASSY, CLUTC |
Thank you 
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11-04-09, 05:38 PM
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#11 (permalink)
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Forum Regular
Join Date: Dec 2007
Location: Holland, Mi
Posts: 58
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Ok I have an oem from toyota, now my question is; Is it ok to use brake fluid instead of clutch fluid? Is there a difference?
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11-04-09, 05:42 PM
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#12 (permalink)
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Location: rome, georgia
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I've only used brake fluid......not familiar with clutch fluid? The real experts will chime in shortly.
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___________________________
69 Fj55
I been warped by the rain, driven by the snow...
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11-04-09, 05:53 PM
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#13 (permalink)
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250+ Club
Join Date: Mar 2009
Location: Kamloops B.C
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just bleed it every few years or year , keep moisture out of it . #1 killer of hydraulic clutch and brake components is water in the fluid .
i just use dot 3 (new bottle), never had a problem before .
there is specific clutch fluid for some things , my street bike has it even though i just use dot 4 instead .
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74 Fj40-350,sm420,60 series axles,36.5 swampers, aussie locked, saginaw.
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11-06-09, 07:28 PM
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#14 (permalink)
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Forum Regular
Join Date: Dec 2007
Location: Holland, Mi
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Cool, thanks.
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JohnnyC
1969 Toyo FJ55
The Damned Thing
Beastly
