Washer Pump System Re-build 1972.Help!
Thread Starter
Instructor
Joined: Nov 2002
Posts: 175
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From: GRIMSBY N.E.LINCS. U.K.
Washer Pump System Re-build 1972.Help!
I think the o-ring/or whatever on the plastic piston behind the plastic 3 valve plate (inlet+2outlet rubber valves) is worn and not delivering enough pressure when pumping out to the nozzles on the wipers.
The forementioned valves/o-ring/3 joined o-rings etc. are all renewed, the bag filter and bag are new, the pipes are clear,pump is primed, mechanics working perfect.
Is it possible to remove the plastic piston asembley from the pump base plate whilst still in the car and renew the piston 0-ring?
Will renewal produce a much stronger jet of water (its not a particulary strong spray at the moment).
Please advise precisely how to do this if its possible,ive done a deep search and found no info thus it could be of help to others too.
Before i go any furthur how do i remove the plastic dust shield off the top of the pump gears (is it just held lightly in place by the 2 spade wire connectors?)
MAY I THANK YOU IN ADVANCE FOR YOUR HELP AND ADVICE,
SAM.
The forementioned valves/o-ring/3 joined o-rings etc. are all renewed, the bag filter and bag are new, the pipes are clear,pump is primed, mechanics working perfect.
Is it possible to remove the plastic piston asembley from the pump base plate whilst still in the car and renew the piston 0-ring?
Will renewal produce a much stronger jet of water (its not a particulary strong spray at the moment).
Please advise precisely how to do this if its possible,ive done a deep search and found no info thus it could be of help to others too.
Before i go any furthur how do i remove the plastic dust shield off the top of the pump gears (is it just held lightly in place by the 2 spade wire connectors?)
MAY I THANK YOU IN ADVANCE FOR YOUR HELP AND ADVICE,
SAM.
Terrorizing Orange Cones
Joined: Oct 2007
Posts: 2,572
Likes: 17
From: Northern CO
...
Is it possible to remove the plastic piston asembley from the pump base plate whilst still in the car and renew the piston 0-ring?
Will renewal produce a much stronger jet of water (its not a particulary strong spray at the moment).
...
Before i go any furthur how do i remove the plastic dust shield off the top of the pump gears (is it just held lightly in place by the 2 spade wire connectors?)
MAY I THANK YOU IN ADVANCE FOR YOUR HELP AND ADVICE,
SAM.
Is it possible to remove the plastic piston asembley from the pump base plate whilst still in the car and renew the piston 0-ring?
Will renewal produce a much stronger jet of water (its not a particulary strong spray at the moment).
...
Before i go any furthur how do i remove the plastic dust shield off the top of the pump gears (is it just held lightly in place by the 2 spade wire connectors?)
MAY I THANK YOU IN ADVANCE FOR YOUR HELP AND ADVICE,
SAM.
Speaking from a one-time experience in semi-disassembly of the wiper motor and washer pump, I'm not sure if removing the pump's plastic piston can be performed while still mounted to the firewall.
If I remember correctly, the plate that the pump mounts to can be removed for bench work but reinstalling it may be the challenge. There is a fairly stout spring and cam assembly that drives the piston that needs to be indexed and could be a real pain while still mounted.
Unless the pump's bore is worn so excessively, I would share your expectation that replacing any o-ring should restore a good seal therefore, better pressure.
As far as removing the cover, carefully pry it off the post ID'd in the photo. The two spade connectors route through a slot but do not actually secure the cover. See the following:
I know that may not offer all your answers but it may help a little.
Thread Starter
Instructor
Joined: Nov 2002
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From: GRIMSBY N.E.LINCS. U.K.
Has anyone got close up detailed photos from different angles of both the bottom/cam side and the top/ratchet side of this washer pump they could post?
Any ideas/answers to my 1st questions yet? Realy dont want to disturb this system till fully understand the mechanical operations of the mechanism seen its working but would like to improve the output jet of water somewhat.
Any ideas/answers to my 1st questions yet? Realy dont want to disturb this system till fully understand the mechanical operations of the mechanism seen its working but would like to improve the output jet of water somewhat.
Team Owner
Joined: Sep 2006
Posts: 31,229
Likes: 4,323
From: Westminster Maryland
Hi SS,
I have an article about rebulding the 3 and 5 port pumps that I'll send you. Perhaps it'll be some help to you.
Have you seen the information on the motor and pump in the 'GM Chassis Service Manual'?
Regards,
Alan
I have an article about rebulding the 3 and 5 port pumps that I'll send you. Perhaps it'll be some help to you.
Have you seen the information on the motor and pump in the 'GM Chassis Service Manual'?
Regards,
Alan
Thread Starter
Instructor
Joined: Nov 2002
Posts: 175
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From: GRIMSBY N.E.LINCS. U.K.
I've P.Md. you my E-Mail adresshope to hear from you soon.
Hoping for more input from others on the best forum.
SAM.
Last edited by SARASOTA SAM; Sep 17, 2009 at 05:15 PM.
Thread Starter
Instructor
Joined: Nov 2002
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From: GRIMSBY N.E.LINCS. U.K.
A possible semi cure?????/
Some one sugested coating the plastic bore in vasaline to assist O-ring to be lubricated and swell a bit.
Another said NO-NO, will swell too much use swimming pool lube!(what the h... is that?).
Well i dont know but does'nt every plumber use vasaline on MODERN o-rings in pressured water line connections?
WHAT DO YOU THINK??
Is it possble to remove plastic piston bore whilst in car ,if so how do you do it.?
regards SAM.
Some one sugested coating the plastic bore in vasaline to assist O-ring to be lubricated and swell a bit.
Another said NO-NO, will swell too much use swimming pool lube!(what the h... is that?).
Well i dont know but does'nt every plumber use vasaline on MODERN o-rings in pressured water line connections?
WHAT DO YOU THINK??
Is it possble to remove plastic piston bore whilst in car ,if so how do you do it.?
regards SAM.
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Race Director
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Vaseline will swell certain types of 'rubber' o-rings to the point that they will self destructs Swimming pool lube is silicone based and will not cause the o-ring to swell or distort. It's used on pump covers, filter connections etc.
Thread Starter
Instructor
Joined: Nov 2002
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From: GRIMSBY N.E.LINCS. U.K.
Gonna try silicone base instead!
BUT THE MOSTER QUESTION STILL REMAINS?
Can this 1972 piston be really removed for reburshiment with the whole base plate attached to the motor body whilst still in situ mounted to the firewall with out disturbing the mechanism?
COME IN YOU N.C.R.S. EXPERTS . NOWS THE TIME TO SAVE US MORTALS A BUNCH OF HEARTACHE AND MONEY...WHAT YU,,SAY..!
Thread Starter
Instructor
Joined: Nov 2002
Posts: 175
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From: GRIMSBY N.E.LINCS. U.K.
Stll having issues here.
Can some one post close up photos of the washer piston top/back /side ??
I'm lead to believe this piston on a 1972 will pop out if pushed down and turned 90 degree allowing renewal whilst still in the car.
Any one done this at all?? Mine seems not to want to turn.
Please try and help, dont want to break anything.
SAM.
Can some one post close up photos of the washer piston top/back /side ??
I'm lead to believe this piston on a 1972 will pop out if pushed down and turned 90 degree allowing renewal whilst still in the car.
Any one done this at all?? Mine seems not to want to turn.
Please try and help, dont want to break anything.
SAM.
Le Mans Master
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
Stll having issues here.
Can some one post close up photos of the washer piston top/back /side ??
I'm lead to believe this piston on a 1972 will pop out if pushed down and turned 90 degree allowing renewal whilst still in the car.
Any one done this at all?? Mine seems not to want to turn.
Please try and help, dont want to break anything.
SAM.
Can some one post close up photos of the washer piston top/back /side ??
I'm lead to believe this piston on a 1972 will pop out if pushed down and turned 90 degree allowing renewal whilst still in the car.
Any one done this at all?? Mine seems not to want to turn.
Please try and help, dont want to break anything.
SAM.
Thread Starter
Instructor
Joined: Nov 2002
Posts: 175
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From: GRIMSBY N.E.LINCS. U.K.
Le Mans Master
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
I just took mine apart some to see what I could figure out and you definitely need to do this off the car.
This part just unscrews.
After removing that you will find this.
I gave that piece a little twist and here you can see the end of the piston.
I'm not sure if this helped you but it's the best I can do, I'm sure Ernie (Willcox) will be along soon to help you out.
This part just unscrews.
After removing that you will find this.
I gave that piece a little twist and here you can see the end of the piston.
I'm not sure if this helped you but it's the best I can do, I'm sure Ernie (Willcox) will be along soon to help you out.
Last edited by DZRick; Sep 24, 2009 at 01:32 PM.
Thread Starter
Instructor
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From: GRIMSBY N.E.LINCS. U.K.
DZRick your a diamond! just what i needed to see! Magic.
See those cross pieces on the head of the piston well if things are as told if you turn them 90 degrees that piston pops out so you can renew the o-ring/seal.Theres the return spring behind there so beware as not sure how strong can't be that much though.
I really apreciate where youve got me to and understand if you don't want to investigate furthur.
If so lets hope for input for the final stage from others mayee Wilcox may pick up or some one has done this
Regards SAM.
See those cross pieces on the head of the piston well if things are as told if you turn them 90 degrees that piston pops out so you can renew the o-ring/seal.Theres the return spring behind there so beware as not sure how strong can't be that much though.
I really apreciate where youve got me to and understand if you don't want to investigate furthur.
If so lets hope for input for the final stage from others mayee Wilcox may pick up or some one has done this
Regards SAM.
Le Mans Master
Joined: Jun 2005
Posts: 5,447
Likes: 3
From: Syracuse NY
DZRick your a diamond! just what i needed to see! Magic.
See those cross pieces on the head of the piston well if things are as told if you turn them 90 degrees that piston pops out so you can renew the o-ring/seal.Theres the return spring behind there so beware as not sure how strong can't be that much though.
I really apreciate where youve got me to and understand if you don't want to investigate furthur.
If so lets hope for input for the final stage from others mayee Wilcox may pick up or some one has done this
Regards SAM.
See those cross pieces on the head of the piston well if things are as told if you turn them 90 degrees that piston pops out so you can renew the o-ring/seal.Theres the return spring behind there so beware as not sure how strong can't be that much though.
I really apreciate where youve got me to and understand if you don't want to investigate furthur.
If so lets hope for input for the final stage from others mayee Wilcox may pick up or some one has done this
Regards SAM.
