Register free!
Search
 
     

The Green Industry's Resource Center


Click for Weather
Reply
 
Thread Tools Display Modes
  #1  
Old 04-17-2013, 11:02 PM
carguyrob carguyrob is offline
LawnSite Member
 
Join Date: Jan 2010
Location: Columbus Ohio
Posts: 192
Hydro system problems

I have researched this to death and the only solution I have found is that it could be anything, so any advice or pointers are welcomed! I have a scag wildcat with about 2000hrs on it. I took the left side wheel motor apart to replace the seals as it was leaking fluid at the end of last season. Everything went fine in the disassembly and reassembly of the unit and it no longer leaks. The only problem is the left side is lacking power. Going up hills it is almost useless and starting the left wheel from a stop I would describe as notchy or hesitant. On flat ground it runs almost normal, and the cooler the system the better it runs. I figured it was an air pocket but I have tried purging the system the recommended way 3 times now and it seems to do nothing with no air showing up in the resevoir. I filled the wheel motor with oil during and after reassembly and did a full fluid change with filter (which I also filled with oil prior to installation). The other side functions perfectly, and both pressure release valves are tight. Sorry for the long winded post! Any ideas? Thanks
__________________
01 Chevy 2500HD w/Meyer Plow
13 Chevy 3500 SRW Diesel
7x20 Open Landscape Trailer
5x10 Open Landscape Trailer
07 Scag Wildcat 61"
14 Scag Tiger Cat 52"
14 Scag Vride 36"
07 Scag Z-Cat 36"
03 Scag SWZ 48"
00 Scag SW 32"
Redmax and Echo Trimmers and Blowers
Reply With Quote
  #2  
Old 04-18-2013, 07:05 PM
Restrorob's Avatar
Restrorob Restrorob is offline
LawnSite Fanatic
 
Join Date: Apr 2005
Location: Show'n my truck off !
Posts: 10,604
Quote:
Originally Posted by carguyrob View Post
I have tried purging the system the recommended way 3 times now and it seems to do nothing

Just curious...... Describe the "recommend" way ?

Is the hydro belt in good condition and tensioned properly ?

Make sure your hydro lines are tight, They can suck air without leaking oil.....
__________________
Quote:
Originally Posted by piston slapper View Post
You never learn anything until you admit you don't know it all...

"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
Reply With Quote
  #3  
Old 04-19-2013, 07:57 AM
dieselss dieselss is offline
LawnSite Senior Member
 
Join Date: Apr 2012
Location: highland in
Posts: 499
Was it doing this before you tore dwn the wheel motor?
What weight oil are you running in it
Posted via Mobile Device
Reply With Quote
  #4  
Old 04-19-2013, 10:18 AM
carguyrob carguyrob is offline
LawnSite Member
 
Join Date: Jan 2010
Location: Columbus Ohio
Posts: 192
Quote:
Originally Posted by Restrorob View Post
Just curious...... Describe the "recommend" way ?

Is the hydro belt in good condition and tensioned properly ?

Make sure your hydro lines are tight, They can suck air without leaking oil.....
I jacked the mower up and opened the release valves and moved the controls back and forth for a few minutes. I did check the belt and tensioner and both appear to be fine. The right side runs perfectly. The only lines I removed are the 2 going into the wheel motor and I doubled checked them yesterday, they are tight. If there is air in the system is it possible it would only affect the left side?
__________________
01 Chevy 2500HD w/Meyer Plow
13 Chevy 3500 SRW Diesel
7x20 Open Landscape Trailer
5x10 Open Landscape Trailer
07 Scag Wildcat 61"
14 Scag Tiger Cat 52"
14 Scag Vride 36"
07 Scag Z-Cat 36"
03 Scag SWZ 48"
00 Scag SW 32"
Redmax and Echo Trimmers and Blowers
Reply With Quote
  #5  
Old 04-19-2013, 10:19 AM
carguyrob carguyrob is offline
LawnSite Member
 
Join Date: Jan 2010
Location: Columbus Ohio
Posts: 192
Quote:
Originally Posted by dieselss View Post
Was it doing this before you tore dwn the wheel motor?
What weight oil are you running in it
Posted via Mobile Device
The hydro's weren't 100% before I tore it down, but it had no problems going up any hill I wanted it too. I had noticed over the years the ground speed doesn't seem to be what it used to, but never any shortage of torque. I am running 20-50 amsoil in the hydros.
__________________
01 Chevy 2500HD w/Meyer Plow
13 Chevy 3500 SRW Diesel
7x20 Open Landscape Trailer
5x10 Open Landscape Trailer
07 Scag Wildcat 61"
14 Scag Tiger Cat 52"
14 Scag Vride 36"
07 Scag Z-Cat 36"
03 Scag SWZ 48"
00 Scag SW 32"
Redmax and Echo Trimmers and Blowers
Reply With Quote
  #6  
Old 04-19-2013, 10:22 AM
carguyrob carguyrob is offline
LawnSite Member
 
Join Date: Jan 2010
Location: Columbus Ohio
Posts: 192
Also, after running the mower all day yesterday, the problem definitely gets worse as the fluid heats up. Cold off the trailer it runs pretty good, but by the end of a 4 lawn stop I did yesterday I needed to push the left lever almost all the way to get it up the trailer.
__________________
01 Chevy 2500HD w/Meyer Plow
13 Chevy 3500 SRW Diesel
7x20 Open Landscape Trailer
5x10 Open Landscape Trailer
07 Scag Wildcat 61"
14 Scag Tiger Cat 52"
14 Scag Vride 36"
07 Scag Z-Cat 36"
03 Scag SWZ 48"
00 Scag SW 32"
Redmax and Echo Trimmers and Blowers
Reply With Quote
  #7  
Old 04-19-2013, 10:50 AM
dieselss dieselss is offline
LawnSite Senior Member
 
Join Date: Apr 2012
Location: highland in
Posts: 499
Id say pump. But are all the seals in the proper ways. Are they all the same sizes etc...
Posted via Mobile Device
Reply With Quote
  #8  
Old 04-19-2013, 10:59 AM
carguyrob carguyrob is offline
LawnSite Member
 
Join Date: Jan 2010
Location: Columbus Ohio
Posts: 192
In the wheel motor there were 2 or 3 different sized seals. It was pretty obvious where they all went, I had the service manual too. Is there a way to test the pump? I wish the parts weren't so expensive, just don't wanna buy stuff I don't need. Thanks!
__________________
01 Chevy 2500HD w/Meyer Plow
13 Chevy 3500 SRW Diesel
7x20 Open Landscape Trailer
5x10 Open Landscape Trailer
07 Scag Wildcat 61"
14 Scag Tiger Cat 52"
14 Scag Vride 36"
07 Scag Z-Cat 36"
03 Scag SWZ 48"
00 Scag SW 32"
Redmax and Echo Trimmers and Blowers
Reply With Quote
  #9  
Old 04-19-2013, 12:20 PM
Restrorob's Avatar
Restrorob Restrorob is offline
LawnSite Fanatic
 
Join Date: Apr 2005
Location: Show'n my truck off !
Posts: 10,604
Try purging by leaving the bypass valves closed, Run throttle at about 3/4's then move sticks slowly full forward then full reverse. Do this 8-10 times back and forth slowly and see if it makes a difference.

You need a fluid flow meter to test hydro pumps, Their in the $350-400 range in which is why some smaller shops don't have one......
__________________
Quote:
Originally Posted by piston slapper View Post
You never learn anything until you admit you don't know it all...

"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!
Reply With Quote
  #10  
Old 04-20-2013, 09:42 AM
carguyrob carguyrob is offline
LawnSite Member
 
Join Date: Jan 2010
Location: Columbus Ohio
Posts: 192
I will try that today. Do you think it will make a difference since mowing with it hasn't? I figure all my maneuvering is pretty much purging with the valve closed. The fact it gets way worse with hot fluid has me wondering. Thanks for the help
__________________
01 Chevy 2500HD w/Meyer Plow
13 Chevy 3500 SRW Diesel
7x20 Open Landscape Trailer
5x10 Open Landscape Trailer
07 Scag Wildcat 61"
14 Scag Tiger Cat 52"
14 Scag Vride 36"
07 Scag Z-Cat 36"
03 Scag SWZ 48"
00 Scag SW 32"
Redmax and Echo Trimmers and Blowers
Reply With Quote
Reply

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 ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 11:16 PM.

Page generated in 0.07370 seconds with 7 queries