My 1974 OEM booster failed a few years ago and have not had time to deal with it. I started rebuilding the 74 booster that had brake fluid leak into it. I tore it down, repainted, and reassembled it, but was unable to get some of the external gaskets to finish the job.
Finally getting back to this project. I just received my new booster, an aftermarket dual diaphragm booster for later FJ40s. I thought it would be helpful to post comparisons.
On the Left is a 1978 FJ40 Bendix booster (OEM?) made in Japan. In the middle is my made in China booster, SKP SKBB058 ($105 shipped from Rock Auto). On the right is my partially rebuild OEM booster. The only single diaphragm booster is the right one.
On the post-its, I listed following:
OD: Outside Diameter
VOR: Valve Operating Rod (distance measured from back of booster, to the end of the threaded rod)
BD: Booster Depth (distance from the back of master cylinder to the firewall. For the SKP booster, the first number is with the spacer, the second without. Spacer measures approximately 3/4")
* All dimensions are taken as best I could, without a caliper (which I do not have).
Does anyone know offhand if the new SKP booster can be installed without the 3/4" spacer?
BTW, the Part Number for the 74, single diaphragm booster is SKBB059. The images you see on the internet are NOT accurate and actually reversed. They show the dual booster pictures for single booster and vise versa.
Finally getting back to this project. I just received my new booster, an aftermarket dual diaphragm booster for later FJ40s. I thought it would be helpful to post comparisons.
On the Left is a 1978 FJ40 Bendix booster (OEM?) made in Japan. In the middle is my made in China booster, SKP SKBB058 ($105 shipped from Rock Auto). On the right is my partially rebuild OEM booster. The only single diaphragm booster is the right one.
On the post-its, I listed following:
OD: Outside Diameter
VOR: Valve Operating Rod (distance measured from back of booster, to the end of the threaded rod)
BD: Booster Depth (distance from the back of master cylinder to the firewall. For the SKP booster, the first number is with the spacer, the second without. Spacer measures approximately 3/4")
* All dimensions are taken as best I could, without a caliper (which I do not have).
Does anyone know offhand if the new SKP booster can be installed without the 3/4" spacer?
BTW, the Part Number for the 74, single diaphragm booster is SKBB059. The images you see on the internet are NOT accurate and actually reversed. They show the dual booster pictures for single booster and vise versa.
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