Roca wiper motor problem NC 795

[Damen af Kungsholmen]

Hello

What happens if you fold up the wiper arm and start the system.

Still nothing happens?

Then I suggest to check if the fuse is blown.

The wiper motor has normally a internal overheating switch but resets it itself.

The click you can hear could that comes from the relay?
Measuring if you have 12 volt at the motor when its on. 
If its park at one side then its done by a internal electrical system at the worm wheel.
Below diagram are for one speed wiper motor.  


Note if you have a cone shaft:

When the arm is completely new, it is completely smooth in its cone and when you tighten the nut, it creates splines. Here it is important that it must be done with the right torque. After removal its important to clean the shaft otherwise will the shaft only run and the wiper arm stay still.

Measure the shaft and come back to me and I will check which torque it should be tighten with.






Good luck
:-Dan

[Damen af Kungsholmen]

I had a conversation with my colleague who draws and designs wiper equipment for boats, trains and construction machinery. He said that Roca has had problems that they are burning in the contact area for parking. This is located inside the engine on the worm wheel. The result is that the engine does not run at all. If you can make the engine move by grabbing the arm, it can slide over the parking lot and thus make only one stroke.Just disassemble everything and open the lid and use a super fine sandpaper to clean the electrical contact surface.


Unfortunately we do not sell this brand so I can not send any detailed pictures or spreads. Another standard fault are that the shaft get stick in the bearing. To avoid this we recommend to lubricate that critical part. We have made for the Swedish Marine and ferry a special sealing to avoid this and also to bring in extra grease. 


:-D

[ihsan]

Mar 14, 2021 22:37:15 GMT viewfinder said:

Thank you for your detailed instruction, Dan.

Tried to fold up the wiper arm and motor still doesn't move. It seems the click is from the relay. Does that mean it's not the fuse?

There are two screws that I loosened to adjust the wiper arm. Now one screw is blocked by the plastic part, so I no longer have access to it. What else should I try?

I am not an expert on this subject This may not address your particular case. When my adjustment screws came completely out I realized that they don't get in again. What my technician told me to do over the telephone is herebelow, but I have not tried yet.

"If for any reason the adjustment screws come off completely from their place, and they are in your hand, screws don't get in again. Therefore, the only way to rescrew is to take out that black horizontal plastic piece in the middle of the two adjustment screws by unclipping. Once that horizontal plastic piece is detached you can put in your adjustment screws back again. And then, as you put the plastic piece back, you have to apply pressure on it and put the clips you have taken out in position again. Be careful with the clips, they easily fall and get lost".

[viewfinder]

It seems the motor is jammed? It moves a little but stops. How to help “release” it? I don’t want to make it worse.

Here is a video.

vimeo.com/526649163/8da8743a0a

[Capt’n Ron]

Hi Viewfinder, I was looking at yours (top image) compared it to mine (bottom image) and it looks like your’s got over extended to the right.  Now how to fix it I’m not exactly sure.  It looks like you can remove a clip on the long arm that connects to the smaller arm and release so you can re-adjust the wiper arm. That’s the only thing that comes to mind.  

[Capt’n Ron]

It’s also hard to see in your photo where the long arm connects to the big wheel. Did it break?

[Capt’n Ron]

Those are E-clips. There are special tools to take them off, but I’ve used needle nose pliers or a flat head driver and pry between the shaft and clip. Got to watch it though because they can spring off and can be hard to find. I would put my thumb on the top as I slowly pry it off. Btw, I’ve not take one off these wipers so I don’t know how easy or hard they come off or go back on.

[avedalang]

HI....Something that I super disdain is wipers that babble. Typically this happens in light of the fact that their isn't sufficient water on the glass. The wipers in my boat are either on or off. There is no irregular. The switches are a three position switch, flitting, OFF and ON. I'd love to have the option to add a variable clock.

I have three switches, one for every wiper. In the event that I haul them out I'd have a major opening in my rudder board. I'd love a clock that I could add that would give the capacity to give a clock to the ON position of each of the three switches. I'm simply not savvy enough to sort out how.

pcb assembly services

[Capt’n Ron]

Mar 23, 2021 3:49:42 GMT viewfinder said:

Mar 21, 2021 19:05:38 GMT Capt’n Ron said:

Those are E-clips. There are special tools to take them off, but I’ve used needle nose pliers or a flat head driver and pry between the shaft and clip. Got to watch it though because they can spring off and can be hard to find. I would put my thumb on the top as I slowly pry it off. Btw, I’ve not take one off these wipers so I don’t know how easy or hard they come off or go back on.

Managed to get both e-clips off today. Wasn't difficult at all. But the plastic part still doesn't come off. Tried prying it using a screw driver but didn't work. Any tips?

Hi Viewfinder, any luck?  You may want to give Roca a call and see if they have any suggestions.