Wiper motor/rack slow

[Rob_the_Sparky]

As long as I've owned the car it has struggled to get the wipers across the screen when dry but now it is beginning to struggle when wet so thought I'd ask the advice of the masses

I was thinking about where the problem might be, I.e. is it the rack that just needs lubrication or is it the motor/gearbox that is at fault. Lubrication seems easier and I can imagine that the inner might slide out once the wipers are disconnected. Can this be done or is there some other way of ensuring the rack is OK before going for motor/gearbox replacement?

[Steve_D]

As you say first move is the remove the motor from its mounts and the end of the tube. with the arms removed you should be able to pull the rack out still connected to the motor.
This alone should give clues as you asses how stiff it is to remove.
Next try turning each of the wheelboxes. They should be that free that you can almost spin them.

If these and the tubes are good then you can try bench testing the motor.
If the motor is the issue it can be rebuilt...there are no replacements that are the correct power rating.

Steve

[Penelope Stopit]

Plenty here https://www.pistonheads.com/gassing/topic.asp?h=0&...

[Rob_the_Sparky]

Brilliant thanks for all that, time to get to work

[FlipFlopGriff]

if you need the motor rebuilding Adrian Venn's your man.
FFG

[Rob_the_Sparky]

Another good wiper thread. OK it is old and not Griffith but what is being discussed seems to be relevant.

link

[dnb]

Sounds like a similar problem to one of mine. The teeth on the wheel boxes that drive the wipers get worn so there's a lot of free play. This then seems to impose side loads on the wheel boxes themselves (and they aren't held on to the car well either) and this adds resistance. One simple thing to try is to rotate the wheel boxes and wiper orientation by 180 degrees so the "fresh" teeth are used to drive the system to minimise these side loads. It's not perfect, but it's easier than pulling the whole thing out to re-enforce everything.