The Green Industry's Resource Center

Old 09-29-2008, 08:25 AM
mxzxrider mxzxrider is offline
LawnSite Member
Join Date: Sep 2008
Location: Clarkesville, Ga
Posts: 1
Hydro Bleeding??

Just got a good deal on an earlier model Sentar. It has one problem that I have found. When releasing the hand controls after going full forward, it pulls HARD to the left. It is tracking straight. I've made the neutral adjustments on both pumps, but it still pulls to the left when I release the controls. The guy I bought it from said he had the right pump replaced at the beginning of this season. A friend mentioned it may need to be bled. I have followed the manuals bleeding instructions, but I never see fluid coming out of the release valves. It seems like eventually fluid would follow the air out of these valves?? It also appears no air is coming out either. (Bubble test) Mower has 253 hours. 61", 25 hp. The pump oil looks very clean.
Reply With Quote
Old 09-29-2008, 10:23 AM
WrightCommercial WrightCommercial is offline
Join Date: Apr 2008
Location: Frederick, MD
Posts: 522

When bleeding the system you will not see air or oil coming out of the system. It will release any trapped air into the system and allow it to escape in the vented hydro tank. One of two things is going on, either the new pump is sticking or the control system is sticking. Does the mower only have the problem when the mower is running, if you unhook the control cable from the pump does the control system move freely or is it binding? If it is binding and all the bushings and connections look good the cable from the lever to the pump needs to be replaced. If the right side controls only stick when the mower is running then the pump is having the problem. Did the previous owner state why the hydro pump was replaced?

Best Regards
Wright Service Department
Reply With Quote

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

Layout Style:

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 10:18 AM.

Page generated in 0.06093 seconds with 8 queries