Forum bmwbike.com

Can anyone suggest me how is possible monting of rubber part on the metallic frame ?
My frame is tube tipe with two screws in the rear and a metallic tongue leaving from the front center and secured to the main frame by two screws . The rubber part is completly closed upper and botton exception of one hole in the front bottom ( across it passes the tongue of frame ....I suppose ) and two holes in the rear side . There are two little slits on the side .
Thanks for any suggestion you may give me

Ettore

It sounds like you are trying to replace the rubber cover on a solo saddle. I have not done this.

One person offered this advice several years ago:
"Start in a good location with a concrete floor. Insert both the front and rear pieces of the frame into the saddle w/o attempting to connect them. Fold the front 1/2 back over the rear with the saddle up. Place the assembly on the floor and put all your weight on the rear bar. Then force the front half over. Do this with some precision and the front 1/2 will line up with the holes in the rear part of the frame. Once they are lined up (this is the tricky part), give it a final push and the frame will snap together. If you failed to line them up, take it apart and try again. Soaking the saddle in hot water will make it cooperate a little."

Other people have recommended soaking the rubber cover in a bathtub of hot water, then two people getting in the tub to help each other. one to hold the frame and the other to stretch the cover. This might be fun to try

The Steiger, Denfeld and Pagusa seats use the same style of cover, which should fit your frame. The cover is shown in the Huggett store as:
52 51 7 002 004 Pagusa saddle cover without frame 85.00 CHF

I had a Steiger seat which comes with a thin cover, and I wanted to replace the cover with the thicker Pagusa rubber cover. After reading the advice on how to replace the cover, I decided to sell the Steiger seat and buy a new Denfeld seat!

It is such an amazingly hard job to do by hand (near impossible). It just about rips the skin off your fingertips and you hand muscles will ache for a week! (and this is with 2 strong adults) I'd suggest making a stretcher using a vw scissor jack.

Hi Ettore,

I made this job three years ago, while repairing my R25/0. I asked Mark Hugget, and here´s what he told me:

"Servus Karl!

2 pints of beer, a bowl of Swiss muesli, and more muscle than brains does the job.

Soap the insides of the rubber cover well and fit the rear frame tube into position with the 2 threaded studs protruding. Make a metal jig which you can fit these 2 threaded studs into and hold them in a vice (Schraubstock).

Fit the front frame part into the saddlecover. Put a steel bar through the saddle cover, climb onto the work bench and stretch the saddle cover upwards while a helper swears and tries to fit the front frame ends into the rear frame tube.

I did it this way for 5 years (by myself,..I had no friends after the first saddle cover!) before I constructed and apparatus out of an old VW car jack (Wagenheber)

Best regards and good luck.

Mark
Mark Huggett GmbH"


And I got an eMail from "Stephen" - he wrote:


"Subject: "PAtent GUmmi SAddle mounting"
Date: Wed, 02 Aug 2000 23:16:05 -0400

Karl...I have done this many times...

1. Place the rubber cover in very hot water for 15-20 minutes
2. Lubricate the hot cover with soap
3. Insert the front part of the seat frame into the cover, and position in the front of the cover
4. Tie a 1 meter piece of nylon rope to the bolt coming out of the bottom surface of the cover, and the other end of the rope to something that cannot move (?end of the table, automobile bumper)
5.Insert the rear part of the seat frame into the cover, and position in the rear of the cover
5b. Tie a 1 meter piece of nylon rope to the two bolts coming out of the bottom surface of the cover, and the other end of the rope to a winch, or pully
6. Insert on one side the front frame "male" into the rear frame "female"
7. Slowly winch the rear frame apart from the front frame until the other side "male" can be inserted into the "female"

Stephen"


And now how I made this job:

- I made it like described by "Stephen", but instead using a (mechanical) winch I took a rope winch from an old jeep - it worked very fine!

If you have some further questions - visit me at my Homepage:

www.R25-Bike.de

You can find there also a picture of a "saddle-stretching-construction" (under: www.R25-Bike.de > TIPS > "Anleitungen, Tips, Ideen" > PaGuSa Satteldeckenspannugn")

Best regards,

Karl Speiser

www.R25-Bike.de