Register free!

The Green Industry's Resource Center



Reply
 
Thread Tools   Display Modes
  #1  
Old 09-20-2011, 11:11 PM
dgreen67 dgreen67 is offline
LawnSite Member
 
Join Date: Jan 2007
Location: Newport News, 23601
Posts: 93
Exmark Viking Hydro Issue

I have Exmark Viking dual hydro with about 350 hours. I am hoping for some advice on how to proceed...here is a quick rundown of the problem...

1. Left side hydro doesn't have much power going forward, none backwards

2. I thought tracking/linkage needed adjustment, did it according to owners' manual and it did not solve problem

3. When I adjusted linkage, the wheels are off the ground (jacked up back of mower to adjust) and both sides worked fine. However once both wheels were on the ground (under a load), the left side was weak going forward and did not have any reverse. The right side is strong in forward and reverse.

4. Please help me.

5. Thank you

Dan
Reply With Quote
  #2  
Old 09-20-2011, 11:22 PM
dutch1's Avatar
dutch1 dutch1 is online now
LawnSite Silver Member
 
Join Date: Dec 2004
Location: Jayhawk
Posts: 2,201
Check the control arm on the hydro pump and make sure it is not slipping on the pump shaft.
Reply With Quote
  #3  
Old 09-20-2011, 11:32 PM
dgreen67 dgreen67 is offline
LawnSite Member
 
Join Date: Jan 2007
Location: Newport News, 23601
Posts: 93
Thanks...I will check that in the morning. If it is slipping, I am guessing that there is a way to firm that up?

Thanks again.
Reply With Quote
  #4  
Old 09-21-2011, 09:43 AM
dutch1's Avatar
dutch1 dutch1 is online now
LawnSite Silver Member
 
Join Date: Dec 2004
Location: Jayhawk
Posts: 2,201
http://www.exmark.com/Products/Viking/Pdfs/4500-693.pdf

This should be the owners manual for a 2011 Viking. Without a serial number I had no way of knowing the proper manual to download. No guarantee, but I would think that design is similar.

Scroll down to page 26 and take a look at figure 8. The pump arm has a flat on it with a small recess on the flat. The control arm is usually held to the pump arm shaft with a tapered set screw. Sometimes those set screws work loose and the control arm may move quite a bit before activating the pump shaft.

If this happens to be your problem, after you center and tighten the set screw in the recess you will need to readjust your tracking. Some manufacturers use two set screws in the control arms(one on the flat and one opposite). If this is the case, tighten the one on the flat side side first. I would suggest that you remove the set screw(s) and examine the tips and replace if not in good condition. Apply some blue Loctite when you replace to help eliminate backout.

Hope this is your problem with only 350 hours.
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 04:13 PM.

Page generated in 0.06678 seconds with 9 queries