Register free!
Search
 
     

The Green Industry's Resource Center


Click for Weather
Reply
 
Thread Tools Display Modes
  #1  
Old 10-02-2013, 10:34 PM
joee0914's Avatar
joee0914 joee0914 is offline
LawnSite Member
 
Join Date: Feb 2011
Location: Morris, New Jersey
Posts: 112
No power to hydro

About two days ago the lower O-rings on my hydros were replaced. The bolt had stripped out which held the plate on causing it to leak pretty bad. I decided after re-tapping the bolt hole that I'd replace the O-rings on both sides.



Number 132 in the picture.

Once apart I allowed both hydros to drain very well since it was getting close to oil change time anyway. Once all put together and o-rings replaced, I refilled the system with oil, once it would not take anymore oil, I opened the bypass valves and ran the levers in forward and reverse a couple of times to purge the air. After that I closed the valves and jacked up the mower and did the same thing to push any remaining air out.

Once I tried to use the mower it sounded like there was still air in the system. It had no power and made a loud screech.

I tried purging any other air out but it seems like the system is completely purged.

I jacked the mower up one last time to make sure I wasn't leaking or had something incorrectly installed but everything seemed fine. I decided to take the cover, where the o-rings were replaced, off again just to make sure it all looked good and once everything was put back together it seemed to cure one side but not the other.

Any ideas on what may be the problem or did I maybe miss something.

Sorry for the long drawn out description, figured it might help.

Also Hydros are - HydroGear ZT2800
__________________
~High Mountain Landscaping, LLC~
Reply With Quote
  #2  
Old 10-03-2013, 06:23 AM
Restrorob's Avatar
Restrorob Restrorob is offline
LawnSite Fanatic
 
Join Date: Apr 2005
Location: Show'n my truck off !
Posts: 10,729
Try purging with the bypass valves closed as follows;

Raise and block the drive wheels off the ground. Start the engine and run about 3/4 throttle, Move the controls full forward then full reverse slowly 8 to 10 times, Then re-check fluid level and test drive.....
__________________
Quote:
Originally Posted by piston slapper View Post
You never learn anything until you admit you don't know it all...
Quote:
Originally Posted by MannsLawnService View Post
some times the man in my mirror isn't so smart...
"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 10-03-2013, 07:02 AM
joee0914's Avatar
joee0914 joee0914 is offline
LawnSite Member
 
Join Date: Feb 2011
Location: Morris, New Jersey
Posts: 112
Quote:
Originally Posted by Restrorob View Post
Try purging with the bypass valves closed as follows;

Raise and block the drive wheels off the ground. Start the engine and run about 3/4 throttle, Move the controls full forward then full reverse slowly 8 to 10 times, Then re-check fluid level and test drive.....
I did this when purging the first time around... No luck

I purged air by:
1 - Open bypass valves and move motion control levers slowly forward and reverse about 6-7 times
2 - Closed bypass valves and jack up drive wheels of mower and move motion control levers slowly forward and back about 6-7 times
3 - With drive wheels still off ground, ran mower with wheels at full forward speed for about 10 Minutes.
__________________
~High Mountain Landscaping, LLC~
Reply With Quote
  #4  
Old 10-03-2013, 08:45 AM
dutch1's Avatar
dutch1 dutch1 is online now
LawnSite Silver Member
 
Join Date: Dec 2004
Location: Jayhawk
Posts: 2,186
I've serviced 6 of those ZT2800's this summer with only one problem, which I'll describe secondarily.

This may seem like a redundant question at this point but did you remove the vent plug when you refilled the transmissions? If not, you may have some trapped air space in the unit. Did the transmission accept the approximate 77+ oz.(about 2.5 quarts) or twice that amount if both were serviced?

When I serviced the transmissions, I had the Zturn rear wheels about 4" off the floor for draining and refill with the vent plugs removed. I experienced no problems whatsoever. Once refilled, the unit was started and the handles
moved both forward and reverse without a hint of hesitation. Just my observations.

The only problem I had on the first unit was with the filters. With no Hydrogear replacement filters within 25 miles, I attempted to use Wix's crossover recommendation and that was not a good choice. Filter threads were correct but the diameter of the filter was sufficiently larger to not seal properly and the filter shields would not reattach without shimming--don't go down that road,

Just a couple of thoughts.
Reply With Quote
  #5  
Old 10-03-2013, 09:14 AM
joee0914's Avatar
joee0914 joee0914 is offline
LawnSite Member
 
Join Date: Feb 2011
Location: Morris, New Jersey
Posts: 112
Quote:
Originally Posted by dutch1 View Post
I've serviced 6 of those ZT2800's this summer with only one problem, which I'll describe secondarily.

This may seem like a redundant question at this point but did you remove the vent plug when you refilled the transmissions? If not, you may have some trapped air space in the unit. Did the transmission accept the approximate 77+ oz.(about 2.5 quarts) or twice that amount if both were serviced?

When I serviced the transmissions, I had the Zturn rear wheels about 4" off the floor for draining and refill with the vent plugs removed.
I attempted to locate the vent plugs but what I thought were the vent plugs didn't seem to have a way to remove them.. They looked as though they just had a 1/8th inch wide hole in the center... Are they meant to just pop out or am I looking at the wrong thing?... I believe what I'm looking at is number 11 in the above diagram.
Posted via Mobile Device
Reply With Quote
  #6  
Old 10-03-2013, 09:22 AM
Jeff in AL's Avatar
Jeff in AL Jeff in AL is offline
LawnSite Senior Member
 
Join Date: Jul 2000
Location: Alabama
Posts: 447
The Charge Pump Cover is directional and sounds like it is on backwards...

If the Charge Pump Cover is aluminum it shouls be replaced with a 4th updated version which is cast iron and will not warp and allow the o-ring to leak.

See if your reference number 203 is/was part number 71411 which was the last upgrade until the cast iron cover which is part number 72274.
Attached Images
File Type: pdf Charge Pump Cover Orientation on ZT2800, 3100 and 3400.pdf (978.0 KB, 21 views)
__________________
Jeff in AL

How very observant of you there captain obvious.

The amount of FREE information that you receive here will be directly proportional to the amount of information that you provide!
Reply With Quote
  #7  
Old 10-03-2013, 09:50 AM
dutch1's Avatar
dutch1 dutch1 is online now
LawnSite Silver Member
 
Join Date: Dec 2004
Location: Jayhawk
Posts: 2,186
Joe, the vent plug, #11, is removed with an allen wrench/bit. I removed them with a 1/4" drive allen socket--can't remember whether it was metric or standard.
Reply With Quote
  #8  
Old 10-03-2013, 11:49 PM
herler herler is online now
LawnSite Gold Member
 
Join Date: Apr 2012
Posts: 3,584
I have a similar problem on a Lesco 52", air in the units, I can get power to the wheels but not full on.
Parker motors, maybe I'll start another thread.
Reply With Quote
  #9  
Old 10-13-2013, 05:15 PM
billc1004 billc1004 is offline
LawnSite Member
 
Join Date: May 2013
Location: SOUTH JERSEY
Posts: 124
jeff in al .. might be right plates to in one direction
Reply With Quote
  #10  
Old 10-13-2013, 06:06 PM
aroddy aroddy is offline
LawnSite Senior Member
 
Join Date: Jan 2011
Location: Texarkana, TX
Posts: 251
I had this exact same problem on a ZT3100. and just like Jeff in AL said. I had it on backwards when I put it on. I called hydrogear and the lady told me first thing try to switch it, she saids it happends all the time. Switched it around and it went to normal.
Reply With Quote
Reply

Tags
hydro , leaking , o-ring , titan , toro

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 08:58 AM.

Page generated in 0.09818 seconds with 11 queries