Roadster Soft Top (RST) hydraulic system fluid renew for MY 90-98

[RKH]

Chris, there you go, the P/N from Karas.
Looks like just a metal screen filter. May be you can clean yours out with compress air? You know just another blow job

[lynns]

Originally Posted by RKH

Chris, there you go, the P/N from Karas.
Looks like just a metal screen filter. May be you can clean yours out with compress air? You know just another blow job

Yes, but here we go again with the confusion. Chris has a 2001 and Jim Karas has a 1991.

I can tell you fer sure that my 2000 p/n 129800 1448 has nothing in the fill cap area that looks like that the OLDER pump cap.

[RKH]

So Lynns, does your 2000 has the round cylindrical tank ? Is there a 3rd line attached to the cap ?
Is it a 129 068 or different # (069?)
Chris's 600 will have a different # 07x

[karas]

Originally Posted by RKH

Chris, there you go, the P/N from Karas.
Looks like just a metal screen filter. May be you can clean yours out with compress air? You know just another blow job

Just for clarification. The p/n is the pump p/n not the filter p/n.

[lynns]

Originally Posted by RKH

I have not done any flushing myself as my fluid in the tank still looks clear.
But I verified it with AllData for the 129 067 :
129.066 is for 1990-1992
129.067 is for 1993-1998
129.068 is for 1999 and on to ? (my AllData does not go beyond 1999)

The chassis is not as important as year the car was built and the VIN.

RST hydraulic pump design and p/n

p/n 129800 0048 or 0548 (OLDER top and roll bar pump - from 1990 to 1998, boxy in shape)

p/n 129800 1948 (NEWER top and roll bar pump - from 1997 VIN 145547 to 2002, cylindrical in shape)


NOTE: using your VIN I suggest that you verify with the Elec. Parts Cat. - EPC.

[RKH]

So the old pump has 2 feed lines plus the return line at the Cap with a filter. Flushing will be simple : just remove the cap with the line and put the whole thing in a receiving container.
The newer Pump has only 1 feed line plus a return line. Flushing will require disconnecting the return line (per your write up). Is there a filter somewhere ?

[lynns]

Originally Posted by karas

My pump p/n is 129800 0048.
Here's a picture of the filter attached to what should be the return line.

Jim are you sure that your pump p/n 129800 0048 is not really p/n 129800 0548 ?

Note: this is not in any way meant to take this thread OFF TOPIC but FYI the RST electronic controller for a 1990-1993 is p/n 129820 0097 and has a seperate rollbar controller if built prior to 11/92. After 1993 the rollbar controller was incorporated into one controller unit.

[BenzBrat]

Originally Posted by chriswufgator

I always thought there was a filter...

Anybody know the p/n for it? I'd like to replace it when I do my flush.

Chris,
When I did mine it was like the one in the picture. Yours is newer so maybe different. Mine looked like it was a very fine stainless steel mesh. There was pretty much nothing in it, but I still cleaned it with a spray degreaser, and then blew it out with air (not too much pressure). I don't think you need to replace it unless the screen is damaged, but your choice.
Karas,
Yours is the same as mine. i can't remember if the filter threads off, or just a light pull, but I had it apart enough to see the inside was clean when I flushed it out.

[lynns]

Originally Posted by RKH

So Lynns,
does your 2000 has the round cylindrical tank ? YES
Is there a 3rd line attached to the cap ? NO
Is it a 129 068 or different # (069?) 129.068
Chris's 600 will NOT have a different chassis # than my129.068

R129.068 is a correct chassis number for a MY99-02. Engine and transmission numbers DO change throughout the 99-02 R129.068 chassis number. Example: Chris has an V12 M120.983 engine with a 722.6xx transmission and I have a V8 M113.961 engine with a 722.624 transmission. NONE of which has anything to do with the pump p/n's.

[lynns]

Originally Posted by karas

My pump p/n is 129800 0048.

At this point I think we can agree that MY90-98 has a center return line, shown in the above pictures, and the return line should be placed into a >500 ml container as the top and rollbar are cycled with fresh fluid and the pump is filled with new fluid as it empties.