Question about 1996 Mercedes-Benz C-Class

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Wiper arm where it is telescopic throws out too far when operated

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The mechanism consists of the main turret, a short sleeve cover that moves with the wiper and the wiper support arm. The short sleeve cover is simply clipped on top and bottom, ease the cover apart to un-clip and lift upwards towards the wiper to free it from the wiper spring hinge. Exposed beneath you will now see a 5mm Allen bolt that retains the wiper arm on the 'telescopic' shaft. Remove this bolt, lift the wiper arm away from the glass on its spring hinge and then pull the wiper assembly off the telescopic shaft. Some real effort may be required here, but it will come free eventually. The turret cover is clipped on top and bottom and loosely around the telescopic shaft bearing. Once exposed you can see if there is any fault by switching on the wiper motor and watching the motion. It is a beautifully elegant design and is very well engineered. I have never known for this mechanism to go wrong (but there is always a first time), it only requires the very clean and occasional grease up. You said the the telescope throws out too far, is it that the wiper blade is hitting the edge of the screen at some point. I would suspect that either the blade fitted is too long or the the wiper blade pivot mount clip to the end of wiper support arm is either worn or is incorrectly fitted. Refitting is the reverse of the above

Posted on Jul 06, 2010

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1 Answer

Wiper linkage and pivot assy bad? 2 left shafts rotate under power, but far right shaft does not (turns hard by hand)


You have power so electric is ok..Sounds like you have stripped wiper arm connections/post and/or wiper motor gear...or possibly bent operating assembly,,,first remove the arms from the post.they should have a small locking device just under the arm at the bottom..move it out and the arm can be released and removed..once both are off check for stripping on arm and wiper if not stripped turn the wipers on see if they operate..if they do shut them off and let them come to a normal stop...then reapply the blades in the normal operating positions and turn on,,adust if needed..if not check for bent and binding of the rods..It not the motor gear or motor will need to be replaced..If you are mechanically inclined it is nit that hard of a job..there are good videos on UTUBE just ask how to replace wiper motor for you vehicle.Good luck..

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Engine schematics 2002 pontiac montana


Hi there:
Isnt a diagram but If you have removed the motor, here is the motor installation procedure....

INSTALLATION PROCEDURE

6_23_2012_11_48_33_pm.gif

Align the wiper motor to the wiper drive system module. NOTE: Refer to Fastener Notice in Service Precautions.
Install the wiper drive system module to wiper motor screws. Tighten Tighten the wiper drive system module to wiper motor screws to 7 N.m (62 lb in) .
Connect the electrical connector to the wiper motor.
Install the crank arm on the wiper motor.


6_23_2012_11_49_39_pm.gif

Rotate the washer solvent container into the installation position.
Install the washer solvent container screws. Tighten Tighten the washer solvent container screws to 6 N.m (53 lb in) .
Inspect the wipers for proper operation.


6_23_2012_11_51_04_pm.gif

Also, here is the crank arm procedure...

REMOVAL PROCEDURE

Remove the wiper system module cover.
Remove the drive link from the wiper motor crank arm.

2.1. Loosen the drive link screws.
2.2. Remove the drive link from the wiper motor crank arm.

Remove the wiper motor crank arm cover and seal.
Remove the wiper motor crank arm from the wiper motor.

4.1. Loosen the wiper motor crank arm screw.
4.2. Tap on the wiper motor crank arm screw with a soft-faced mallet while holding up on the wiper motor crank arm until the wiper motor crank arm loosens from the wiper motor.
4.3. Remove the wiper motor crank arm screw and the wiper motor crank arm from the wiper motor.

INSTALLATION PROCEDURE


6_23_2012_11_52_10_pm.gif

Install the wiper motor crank arm onto the wiper motor.

1.1. Turn the ignition switch to the ACCY position.
1.2. Set the wiper switch to PULSE position. The wiper motor should be operating.
1.3. Turn the ignition switch to OFF when the wiper motor is in the innerwipe position.

IMPORTANT: Do not rotate the wiper motor shaft during the installation of the wiper motor crank arm.

1.4. Install the wiper motor crank arm on the wiper motor while maintaining a 4-8 mm (0.157-0.315 in) gap between the V-grove in the wiper motor crank arm and the tab.

NOTE: Refer to Fastener Notice in Service Precautions.

Install the wiper motor crank arm screw. Tighten Tighten the wiper motor crank arm screw to 16 N.m (12 lb ft) .
Install the wiper motor crank arm cover and seal.


6_23_2012_11_52_52_pm.gif

Check the gap between the wiper motor crank arm and tab. If the gap is not 4-8 mm (0.157-0.315 in) , remove the wiper motor crank arm and repeat installation steps.
Install the drive link onto the wiper motor crank arm.
Install the drive link screws. Tighten Tighten the drive link screws to 5 N.m (44 lb in) .
Install the wiper system module cover.
Inspect the wipers for proper operation.

Additional procedures: Wiper Motor Module Replacement.

TOOLS REQUIRED
J 39822 Wiper Arm Puller

REMOVAL PROCEDURE

Turn the ignition switch to the ACCY position.
Set wiper switch to the PULSE position.
Turn the ignition off when the wiper arms are in the innerwipe position and not moving.
Disconnect the washer hose from the washer nozzle.
Remove the cover from the wiper arm nut.
Remove the wiper arm nut from the wiper transmission drive shaft.
Using J 39822 remove the wiper arm from the wiper transmission.
Remove the wiper blade from the wiper arm.
Clean the knurls of the wiper transmission drive shaft with a wire brush.



Install the wiper blade onto the wiper arm.
Install the wiper arm onto the wiper transmission drive shaft. IMPORTANT: Hold the measuring device at 90 degrees (perpendicular) to the wiper blade tip.
Measure the distance from the wiper blade tip to the solid edge of the windshield blackout. Position the wiper arms at the following distances:

LH - 147 mm (5.79 in) above the glass blackout.
RH - 123 mm (4.84 in) below the glass blackout.

NOTE: Refer to Fastener Notice in Service Precautions.



Install the wiper arm nut onto the wiper transmission drive shaft. Tighten Tighten the wiper arm nut to 48 N.m (35 lb ft) .
Install the cover on the wiper arm nut. IMPORTANT: Lubricate the washer hose with the windshield washer solvent to ease installation on the washer nozzle.
Install the washer hose on the washer nozzle.
Inspect the wipers for proper operation.



Remove the wiper arms from the vehicle.
Remove the air inlet grille panel.
Remove the wiper motor.
Remove the air inlet panel to wiper motor module screws.
Remove the wiper motor module from the vehicle.
Remove the insulators from the wiper motor module.

INSTALLATION PROCEDURE

Install the insulators onto the wiper motor module.
Align the wiper motor module to the air inlet panel. NOTE: Refer to Fastener Notice in Service Precautions.
Install the air inlet panel to wiper motor module screws. Tighten Tighten the air inlet panel to wiper motor module screws to 10 N.m (89 lb in) .
Install the wiper motor.
Install the air inlet grille panel.
Install the wiper arms onto the vehicle.
Inspect the wipers for proper operation.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jun 23, 2012 | 2002 Pontiac Montana

1 Answer

My driver side windshield wiper gear is stripped out allowing the wiper to go were it wishes. It either travels to far and ends up getting stuck on the driver door or it goes to far down and ends up...


Knowing the make and model of your vehicle would help immensely. From your description and my experience, I would say it's not a gear, but the wiper arm itself. Where the arm mounts to the wiper transmission (aka motor), there will be a plastic or sometimes metal cover, gently pull or pry upward on the edge of it to expose the nut that keeps it in place. Remove this nut and then the arm, and inspect the 'teeth' or splines inside the hole on the arm, and on the wiper transmission, where the arm mounts. Most often the arms are made of aluminum, and the transmission is of steel, so the arm will strip first. Usually the arm can be replaced (try a junkyard for a low cost replacement) without much effort, and a few basic hand tools. Also be sure to clean any residual material from the wiper transmission where the arm mounts prior to installation, a piece of steel wool or brillo pad usually works best. I hope this helps, and good luck.

Jan 19, 2011 | Kia Sportage Cars & Trucks

1 Answer

I need to adjust the wiper arm on a 1997 suburban, it hits the side of the window.


Wiper Arm & Blade (Front) Removal & Installation Wiper Blade To Remove:
  1. Turn ignition switch to ACCY position.
  2. Turn wiper switch to PULSE position and turn ignition OFF when wipers are stopped in the innerwipe position.
  3. Push the wiper blade clip button IN and remove wiper blade from wiper arm.
To Install:
  1. Insert wiper arm hook through opening in wiper blade.
  2. Place wiper blade pivot in the inside radius of wiper arm hook.
  3. Pull on wiper blade pivot into hook until it locks into place.
  4. Check wipers for proper operation.
Wiper Arm To Remove:
NOTE: Mark position of wiper blade on windshield to ensure proper position upon reassembly.
  1. Remove washer hose.
  2. Lift wiper arm from windshield and use a screwdriver to disengage retaining latch.
  3. Remove wiper arm from shaft.
To Install:
  1. Place wiper arm on shaft so that wiper arm aligns with marks placed on windshield.
  2. Press arm assembly on shaft and push retaining latch IN.
  3. Connect washer hose.
  4. Remove windshield markings and check wipers for proper operation.
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Oct 26, 2010 | Chevrolet Suburban 1500 Cars & Trucks

1 Answer

Wipers will not move, makes noise and there is power to the motor. Motor was replaced. Someone told me that the arms probably moved to far and are now stuck, how do I fix this?


Windshield Wiper Blade & Arm Removal & Installation Front To Remove:
  1. Mark the location of the wiper on the windshield.
  2. Remove or disconnect the following:
    • Nut cover
    • Nut from the wiper arm
    • Wiper arm
Wiper arm mounting nut gm_truck_s10_w-wpr-arm_ret-nt.gif
To Install:
  1. Install or connect the following:
    • Secure the wiper arm with the nut.
      1. Tighten to: 17 ft-lb (23 Nm)
    • Nut cover
Rear To Remove:
  1. Put the wiper arm in the park position.
  2. Remove or disconnect the following:
    • The washer hose from the connector
    • The cap from the wiper arm
    • The nut from the wiper arm
    • The wiper arm from the wiper motor shaft
Rear wiper arm mounting nut gm_truck_s10_w-wpr-arm_ret-nt_rr.gif
To Install:
  1. Install or connect the following:
    • The wiper arm on the wiper motor shaft in the park position with the wiper arm resting on the park ramp
    • The nut on the wiper arm
      1. Tighten the nut. Torque to: 17 ft lbs (23 nm)
    • The cap on the wiper arm
    • The washer hose on the connector

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The wiper motor hopefully is ok, but if the wiper arms were not mounted at the right spot, it could have damaged the motor as it returned to the rest position, unfortunately.

If there is noise, the noise could be coming from the wiper arm joint being stripped out or the motor itself assuming that the ball joints under the hood and behind the firewall are still connected.

Check these items, and I'm sure you will get to the bottom of this.

Good luck on this repair.

Oct 08, 2010 | 1997 Chevrolet Blazer

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