Register free!
Search
 
     

Click for Weather
  #1  
Old 11-23-2008, 03:58 PM
Raymond S.'s Avatar
Raymond S. Raymond S. is offline
Senior Member
 
Join Date: Jan 2008
Location: Michigan
Posts: 511
Western/Fisher pump "down" adjustment?

I read on here somewhere about adjusting the speed that the blade drops on these pumps. I have a MMI with a western pump I believe. Anyway, it said there were two screws above the fill hole, which I found. It also said to take the top screw, bottom it out, and adjust it out to the desired speed to drop. Well I tried both screws and neither one did anything, it still drops like a rock. Am I doing something wrong or am I even heading in the right direction.

Thanks in advance.
Reply With Quote
  #2  
Old 11-23-2008, 04:55 PM
Crash935's Avatar
Crash935 Crash935 is offline
2000 Club Member
 
Join Date: Sep 2003
Location: grand rapids, Michigan
Posts: 2,377
We need to find out what pump you really have first.
__________________
A man who drives like hell is bound to get there!
Reply With Quote
  #3  
Old 11-23-2008, 05:15 PM
RepoMan207's Avatar
RepoMan207 RepoMan207 is offline
2000 Club Member
 
Join Date: Oct 2008
Location: Maine
Posts: 4,949
try tightening your packing nut. I think I read the same thread not too long ago, but I also think that was on an instact. Does yours look like this...
Attached Images
 
__________________
Ryan
Hodge's Snow & Ice Management LLC
Windham, ME
PlowGuy.Net




Reply With Quote
  #4  
Old 11-23-2008, 07:12 PM
Raymond S.'s Avatar
Raymond S. Raymond S. is offline
Senior Member
 
Join Date: Jan 2008
Location: Michigan
Posts: 511
No, sorry it is the InstaAct. It has the oval shaped filter on the end of the pickup not the round one. (found that out the hard way.)
Reply With Quote
  #5  
Old 11-24-2008, 03:20 AM
B&B's Avatar
B&B B&B is offline
2000 Club Member
 
Join Date: Nov 2006
Location: GPS says I'm here
Posts: 12,783
If it's an Insta-Act pump those two screws "right above the fill hole" are the pump pressure relief valve and the driver side crossover relief valve so its no wonder it didn't affect the drop speed any.

Before you do anything else you need to reset BOTH of the screws/settings you disturbed in order to reestablish the correct pump and cross over pressure settings.

The drop speed screw is on the top of the valve block right beside the motor. Should take a small straight screwdriver. If it's an older plow expect it to be corroded in place...may take some work to get it to turn.
Reply With Quote
  #6  
Old 11-24-2008, 06:45 AM
Raymond S.'s Avatar
Raymond S. Raymond S. is offline
Senior Member
 
Join Date: Jan 2008
Location: Michigan
Posts: 511
I reset the screws back to the number of turns I turned them in. Is this an exact setting or simply 8 turns in = 8 turns out. I may be 1/2 turn off either way.

The screw you are talking about, If I'm facing the front of the pump, it's on the RH side towards the front? I saw that one, almost like a set screw only with a flat screwdriver slot in the top.
Reply With Quote
  #7  
Old 11-24-2008, 06:46 AM
B&B's Avatar
B&B B&B is offline
2000 Club Member
 
Join Date: Nov 2006
Location: GPS says I'm here
Posts: 12,783
Thats the one Raymond.
Reply With Quote
  #8  
Old 11-24-2008, 10:47 AM
Brian Simmons's Avatar
Brian Simmons Brian Simmons is offline
PlowSite.com - Sponsor
 
Join Date: Mar 2002
Location: Washington, ME
Posts: 191
on the two that were misadjusted should be as follows - top hole is your crossover relief and should be backed out 1-1/2 - 1-3/4 turns and the bottom is your system pressure which should be 2 -1/2 turns out.

Brian
__________________
Brian E. Simmons
Technical Service Rep
Fisher Engineering
Reply With Quote
  #9  
Old 11-24-2008, 11:07 AM
Raymond S.'s Avatar
Raymond S. Raymond S. is offline
Senior Member
 
Join Date: Jan 2008
Location: Michigan
Posts: 511
Thanks for the replies fellas. I will adjust the screws accordingly later on when I get home. What effect would it have if the screws were originally 4 complete turns out? Assuming Brian Simmons is correct w/ the 1 1/2 out etc...why would they have been set so far out. I suspect someone just set them that way in error?...
Reply With Quote
  #10  
Old 11-24-2008, 06:40 PM
B&B's Avatar
B&B B&B is offline
2000 Club Member
 
Join Date: Nov 2006
Location: GPS says I'm here
Posts: 12,783
Quote:
Originally Posted by Raymond S. View Post
why would they have been set so far out. I suspect someone just set them that way in error?...
Someone fooled with them who didn't know what they were doing at some point in the past possibly. The pump press really should be set with a pressure gage for the best accuracy.
Reply With Quote
  #11  
Old 11-24-2008, 08:00 PM
Raymond S.'s Avatar
Raymond S. Raymond S. is offline
Senior Member
 
Join Date: Jan 2008
Location: Michigan
Posts: 511
I reset them tonight, and adjusted the other screw a touch. Works much better now. Thanks for all the help guys.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©2000 - 2012 PlowSite.comô Moose River Media
All times are GMT -5. The time now is 09:37 AM.

Page generated in 0.03341 seconds with 10 queries