Hi all.
My 1966 built Morris Cooper 998 wipers go beyond the screen in both directions.
I thought the motor had an incorrect gear fitted.
It should, I think, be 120°.
After removing the motor the gear is stamped 120°.
Will a 100° gear fix the problem?
Anyone else had this?
Thanks
Has this just happened? If the rotor has 120 degrees on it, then it is correct. If NOT, what did you change to make this over-run happen. That'll be the answer. It might be that you've got the wrong wheel boxes
Hi Peter.
To be honest it's the first time I've driven it in heavy rain.
I removed the motor anf all is good. Gear stamped with 120°.
Could it really be wheeboxes, I didn't realise they could be different.
To be really honest, I just guessed about the wheelboxes on the basis that the main drive rotor was correct. A smaller wheelbox drive spindle will give you more degrees of movement per throw of..... anyway!
Nick at MinE bitz is the wiper and wheelbox guru. Or that other wiper guru, Andrew 1967. (see for sale). There will be others of course
Andrew1967 wrote: ↑Sun Jun 18, 2023 9:44 am
Interesting post in a FB group where the guys wheelboxes were fitted upside down causing the wipers to hit the scuttle panel and bonnet !
Thinkin' on my feet here, if the wheelboxes were upside down it'd be a simple matter of re-positioning the wiper arms on the splines. There'd still be the same degree iof 'throw' on the arm(s)
If you pop the cover off the wiper motor you can check for excessive wear in the system. The arms themselves could be worn as they are two parts riveted together, unlikely though. If there is wear in the splines of the wheelboxes, the arms have a habit of flying off completely! Lifting the arms off the screen and gently moving side to side should highlight play in the rack and wheel box gears.
