How does the Volvo 240 windscreen wiper work?
Take note of the keyway. The following images should shed some light on the design and function of the 240 windscreen wiper, along with a couple links to more information at other sites. There are two paths to power the wiper motor, normal wiping done with the switch in Low or High, and the parking sweep, used when the switch is in Interval or Off.
Are there any problems with the wiper motor?
Wiper Motor Problems Wipers Are Slowing Down Wiper Linkage Becoming Loose and Wobbly Front Wiper Failure to Park Removing Cowl Screen for Windshield Wiper Motor Access Rear Wiper Motor 960 Headlamp Wipers Washers: Windshield Washer Jets and Check Valve Tailgate Washer Adding a Low-Fluid Warning Sensor to Your Washer Tank Washer Pump Rebuild Wipers:
What to do if your Volvo wiper arm is loose?
[Tip from Don Foster] If your wiper arm is loose, remove it (the nut is under the cap), clean off the metal chips from both the arm and the splined shaft, reinstall, and add Loctite Blue to the joint and stud. Then sock down the nut tight. Volvo recommends new nuts, but Loctite allows you to reuse the old ones.
What to do if your windscreen wiper is not working?
[Another Comment:] Assuming 740 is not too different than the 240, fix involves pulling the motor out, (you have to disconnect the linkage clip under the dash), and open the shell. Careful to not drop the magnets, they are ceramic.
When did Volvo start using windshield wiper arms?
The early wiper arms attached without a nut, using a spring to retain them. The length of the wiper drive grew to accommodate the deeper cowl beginning in 1986. Most of us are familiar with the part-swap method of trouble elimination. It is an expedient but often inefficient approach. You most likely agree with me or you would not be here.
When to use parking sweep or parking sweep wiper?
There are two paths to power the wiper motor, normal wiping done with the switch in Low or High, and the parking sweep, used when the switch is in Interval or Off. Using the early, non-intermittent (no relay) wiring diagram, the two paths can be followed.