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Fix for slow wipers

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
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renns
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renns

Volvo Repair Database Fix for slow wipers

Post by renns » Thu Jan 29, 2009 1:17 pm

The wipers in my '94 855 have been getting slower with time. A few squirts of lubricant on the exposed shaft helped a bit, but was not a permanent solution.

Here's a few pics and procedure for doing a more thorough repair:

Tools Needed:
T25 Torx screwdriver
10mm wrench
13mm wrench
Flat screwdriver
Grease
Fine sandpaper
Cordless drill

1.) Open hood, and remove wipers - 13mm wrench
2.) Remove large black trim panel that covers wiper area - 5 sheet metal screws - T25 torx
3.) Unplug two power connectors on wiper assembly, and remove two retaining screws - 10mm wrench
4.) Wiggle wiper assembly towards driver's side to disengage pin from rubber grommet, and lift out of car.
5.) Remove plastic cover and large foam piece from around each wiper shaft.
6.) Carefully remove the retaining clip from each wiper shaft - slotted screwdriver
7.) Mark the drive link position with respect to the motor shaft, then remove its retaining nut and washer.
8.) Slide wiper shafts and associated mechanism down and out of aluminum casting. This may take some work, as one or both of the shafts are likely stuck in the casting. Mounting the mechanism in a vise, and slowly prying upwards while pivoting the housing may help. Driving the shaft through with a hammer is another alternative, but be sure to stick a nut on the end of the shaft to protect the threads. The stock nut is aluminum, so using a spare steel nut for this task is recommended if you have one available. There are washers at top and bottom of the shaft - make note of position.
9.) Once disassembled, polish the offending shaft with fine emery cloth or sandpaper. I used some 600 grit, and it worked nicely to remove the corrosion.
10.) Cut a strip of the 600 grit paper, and tape it to a 1/4" drive extension. Trim the paper so a turn or two of the sandpaper wraps around the shaft of the extension. Use this tool mounted in a cordless drill to hone out the bearing bores in the aluminum shafting. This is a quick process that cleans the contaminants off the bearings.
11.) Flush the bores with some cleaning solvent or WD40. Push a bit of rag through, and pull it back and forth to clean and dry the bores.
12.) Apply a liberal coating of lithium grease to shaft and bore, and reassemble following reverse steps to above. Don't forget the washers on the wiper shaft, as well as the large foam gasket pieces. Be sure to get the mechanism in the correct orientation - see pic below. Be sure to align the short crank link with the marks from step 7.)
13.) Re-mount the assembly in the car. Don't forget the foam rubber gasket pieces over each wiper shaft. The wiper cover trim piece pops onto the bottom lip of the windshield. Re-attach with the five T25 screws. There are two water drain hoses that will have popped of during removal. Be sure to reconnect.
14.) Enjoy wipers that once again run proper speed!
Attachments
Hone.JPG
Honing tool made by taping a piece of sandpaper to a 1/4" drive socket extension.
Hone.JPG (18.23 KiB) Viewed 8579 times
Shaft1.JPG
Wiper shaft showing small retaining clip that must be removed prior to sliding the shaft out of the housing.
Shaft1.JPG (33.66 KiB) Viewed 7286 times
frame.JPG
Wiper assembly as removed.
frame.JPG (28.22 KiB) Viewed 7290 times
incarR.JPG
Wiper assembly showing two mounting bolts.
incarR.JPG (38.85 KiB) Viewed 7284 times
incarL.JPG
Wiper assembly showing electrical connectors, and pin/grommet mentioned in step 4.)
incarL.JPG (40.75 KiB) Viewed 7281 times
Last edited by renns on Fri Oct 01, 2010 8:02 am, edited 2 times in total.
1994 850 5-speed wagon, retired at 400,000 km
1998 V70 AWD 5-speed, retired at 358,000 km.
2005 XC70 275,000 km - daily driver

Ozark Lee
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Ozark Lee

Re: Fix for slow wipers

Post by Ozark Lee » Thu Jan 29, 2009 2:14 pm

Another great one renns!

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

renns
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renns

Re: Fix for slow wipers

Post by renns » Thu Jan 29, 2009 2:53 pm

Lee,

Thanks. I've found lots of good info on this site, and like to give back when I can. This was an easy fix, less than 1hr total. I should have done it long ago, but the cold weather and unknown difficulty level put it on the back burner! I was pleased to see the elegant modular design of the wiper drive system, as well as the simple removal process. The hardest part was working the frozen shaft (driver's side wiper in my case) out of the housing.

Roger.
1994 850 5-speed wagon, retired at 400,000 km
1998 V70 AWD 5-speed, retired at 358,000 km.
2005 XC70 275,000 km - daily driver

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billofdurham
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billofdurham

Re: Fix for slow wipers

Post by billofdurham » Thu Jan 29, 2009 3:14 pm

Roger,

I agree with Lee and have added this to the Repair Database.

Bill.
Work was good - retirement is better.

1996 850GLT 2.5 20v Estate Manual.
1995 Peugeot Boxer 2.5Tdi Autosleeper.
Previously:
1984 244DL, Manual, Beige.
1987 744GLE, Manual, Green.
1991 960 3.0 24v, Auto, Silver.
1994 940T Wentworth, Auto, Blue.

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BEJinFbk
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BEJinFbk

Re: Fix for slow wipers

Post by BEJinFbk » Thu Jan 29, 2009 3:59 pm

Excellent Writeup!
( Hope I never need it... :wink: )

Very Nice Work.
'98 V70 R - Well Equipped for Life Up North... ;)

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matthew1
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matthew1

Re: Fix for slow wipers

Post by matthew1 » Thu Jan 29, 2009 11:40 pm

Roger, outstanding writeup. I made your rank "MVS Contributor."

If anyone else has done a lengthy writeup like this or donated through PayPal, and I've failed to change your rank, please email me [email protected].
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1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
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anfranco60
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anfranco60

Re: Fix for slow wipers

Post by anfranco60 » Sat Jun 20, 2009 11:22 am

Genius! I'm a Newbie to the site, but have been a Volvo owner from 544-850's.
Currently working on A/C & Blower fix w/ Pollen filter addition the Ol' school way.
Since I was there.....
Thanks for this info and look forward to contributing.
Anfranco
Have owned & repaired;
62' 544 w/ B18 engine
66' 122 Wagon
4 - 240's
4 - 850's
DD - 2001 V70 T5

mwy
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mwy

Re: Fix for slow wipers

Post by mwy » Wed May 19, 2010 10:05 pm

Thanks for this repair - I fixed the corroded bushing and shaft and now my rear wiper has good movement.
Is there a 'proper' way to remove the rear panel from the tailgate? it is incredibly fragile.

This seems like a common issue that spans several generations of Volvos and should be in the repair database if it isn't already!

Matt
2010 C30 R-Design 6spd
2007 XC70

krguy33
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krguy33

Re: Fix for slow wipers

Post by krguy33 » Fri Oct 01, 2010 6:56 am

I performed this process and freed up the seized drivers side. Now my only problem is.. after re-installation, the wipers seem to be in the opposite direction when turned off. When I turn the wipers off they don' t sit at the bottom of the windshield, they sit in an upright position.

renns
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renns

Re: Fix for slow wipers

Post by renns » Fri Oct 01, 2010 8:06 am

Did the mechanism go back together the same way? I'm wondering if something is reversed. Otherwise, perhaps the crank link to motor shaft position is way off. I've edited the description to recommend marking the crank to motor shaft position prior to disassembly.

If the linkage is all assembled correctly, the I would think just repositioning the short crank link 180 degrees will solve your problem.
1994 850 5-speed wagon, retired at 400,000 km
1998 V70 AWD 5-speed, retired at 358,000 km.
2005 XC70 275,000 km - daily driver

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