91 XJS V12 Convertible Top Hydraulic Pump Question
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I looked more closely, I believe a hex key/Allen wrench, removes the cap to the resevoir. I also plan on using Pentosin to top off. I looked through many other forum posts, and the consensus is that Pentosin is compatible.
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I agree with you about using CHF 11S. Although the aircraft spec fluid may work, I have not seen anyone else recommending it. In fact, everyone apparently uses the Pentosin. The fact that you have it in your trunk, speaks volumes.
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I just started having trouble with raising my convertible top on my 91 XJS Classic Collection. First time, I thought it might be an undercharged battery, so I charged it up and also tried with engine running, but the top still did not raise fully. I discovered some red fluid on the garage fool wicking along an extension cord and initially wondered what it was. Now, I suspect that is from the convertible hydraulic system.
Is CHF 11S a red color?
i will access the pump area to discover if the system is low on fluid and if I have a mess to clean up. I don’t know yet how the fluid gets to the garage floor from the hydraulic system.
Is CHF 11S a red color?
i will access the pump area to discover if the system is low on fluid and if I have a mess to clean up. I don’t know yet how the fluid gets to the garage floor from the hydraulic system.
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I just started having trouble with raising my convertible top on my 91 XJS Classic Collection. First time, I thought it might be an undercharged battery, so I charged it up and also tried with engine running, but the top still did not raise fully. I discovered some red fluid on the garage fool wicking along an extension cord and initially wondered what it was. Now, I suspect that is from the convertible hydraulic system.
Is CHF 11S a red color?
i will access the pump area to discover if the system is low on fluid and if I have a mess to clean up. I don’t know yet how the fluid gets to the garage floor from the hydraulic system.
Is CHF 11S a red color?
i will access the pump area to discover if the system is low on fluid and if I have a mess to clean up. I don’t know yet how the fluid gets to the garage floor from the hydraulic system.
When I got my XJS I had to replace a rubber bushing in the drive shaft of the pump. It serves as the seal. The bushi a bit of work to find online (I bought 4 for future) and, the gear in the pump had shattered before I got the car. Miraculously, I found a guy who sent me the gear. Found him on eBay. The bush is pretty easy to change out.
Anyways, I won't quote anyone, but I have heard that ATF in this style of pump is fine. I've been using ATF and my top after that first fix moves as smooth as butter, no foam or bubbles in the lines and no leaks. Still,,, with the mis luck I've had in some areas, with my level of experience,,, I might NOT be the best person to listen to on matters.
And yes, I think it's a small Allen key and an Oring for the reservoir fill port. Just be careful in turning it off. I'd imagine in some cases them brass on plastic threads have been touching a while and ya wouldn't want to strip them OR crack the whole threaded mold OFF the top of the reservoir. Finding and replacing JUST the white plastic reservoir after damage can't be an easy find....
Last edited by JayJagJay; 07-29-2020 at 08:31 AM.
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LastChance (08-08-2020)
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Thanks very much for your helpful reply.
when you changed the seal, how did you get the motor-pump assembly moved enough to access the seal.
i believe once the assembly is moved enough, one can just remove the 2 bolts joining the pump and motor and then pop out and reinstall a new seal. My problem is getting all the bolts out of the plate so I can move the assembly. I cannot see what may be a 3rd bolt on the plate.
when you changed the seal, how did you get the motor-pump assembly moved enough to access the seal.
i believe once the assembly is moved enough, one can just remove the 2 bolts joining the pump and motor and then pop out and reinstall a new seal. My problem is getting all the bolts out of the plate so I can move the assembly. I cannot see what may be a 3rd bolt on the plate.
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Barry_Tucker
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01-28-2018 04:29 PM
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