72morph 1 #1 Posted February 22, 2010 When I run at full throttle and hit a hill the tractor seems like it is binding up and almost stalls till I reduce throttle.Seem ok when cold.Changed the oil and filter,took out the acceleration valves,they were not plugged.Seems like it is engaging reverse and forward at the same time.When throttle back it is ok.First hydro I have owned.Is this normal?Pulling it in nuetral does not help,just throttle back then ok. B) Share this post Link to post Share on other sites
rickv1957 72 #2 Posted February 22, 2010 Does pump make any noise at that time?,Rick Share this post Link to post Share on other sites
72morph 1 #3 Posted February 22, 2010 Oh yea starts growling. Share this post Link to post Share on other sites
rickv1957 72 #4 Posted February 22, 2010 Almost sounds like pump is getting weak then,Rick Share this post Link to post Share on other sites
72morph 1 #5 Posted February 22, 2010 Is there any other valving that could cause this?Maybe in the motor assy? Share this post Link to post Share on other sites
rickv1957 72 #6 Posted February 22, 2010 Yes it is possible the drive motor can be bad instead of pump,Rick Share this post Link to post Share on other sites
72morph 1 #7 Posted March 4, 2010 Anybody got an idea how to tell if the pump or gear motor is going bad?Got the hydro manual.Will the pump pressures tell whats wrong?Still runs great and have used it all winter to plow snow. Share this post Link to post Share on other sites
rickv1957 72 #8 Posted March 4, 2010 Does your hyd lift still work correctly,if so I would lean towards the drive motor bypassing oil therefor the noise,Rick Share this post Link to post Share on other sites
72morph 1 #9 Posted March 4, 2010 Yea the lift work fine.May take off the motor when the snow quits and take a look.Your saying the oil is going through a bypass valve?Or leaking past the pump pistons causing a backpressure on the cylinders in the motor?It only does this when running hard. Share this post Link to post Share on other sites
72morph 1 #10 Posted March 21, 2010 Changed the pump same problem,will change the motor on Sunday. :omg: Share this post Link to post Share on other sites
72morph 1 #11 Posted April 5, 2010 Ok guys this should give every body a good laugh.After changing the hydro pump,hydro motor,filter,adjusting the shift linkage,took head of to look for scored cylinder,all ok and nogo for the problem. Talked to an old Wheel Horse guy at Snider Toro sales,he says did you check the the point gap?I said "He$$ no what would that have to do with it!" Well it has everything in the world to do with it if they are set to .029". Set them to .020 ran the crap out of it all week end could not stop it.Too much gap too much spark advance hence motor starts to fight itself on load. Now have a good pump and hydro motor for spare,and all that great ojt on the D160.Slammed head several times now feel better.And D160 runs as it should.Also got the carb to idle after raising float and set jets to factory spec. Share this post Link to post Share on other sites
Operator 7 #12 Posted April 5, 2010 :omg: YAAAA !! And the D lives on! Learning experience right? Timing? Learn something everyday. Randy Share this post Link to post Share on other sites
Kelly 1,029 #13 Posted April 5, 2010 Hey 72morph, I sent you a PM :omg: Share this post Link to post Share on other sites
rickv1957 72 #14 Posted April 5, 2010 Glad to hear you got your D160 up and going!!,Rick Share this post Link to post Share on other sites
Roger from southern Iowa 1 #15 Posted April 5, 2010 Some tines the simplest things cause you to At least you have a strong working D....and spare parts. Glad the mystery is solved. :D Share this post Link to post Share on other sites
72morph 1 #16 Posted April 6, 2010 A complete tune should be first when starting on an old tractor.But it ran so goood up to a point.Asume asume.Had a new coil!Oh welllllll.Hope a lot of people read this and save a few weekends for other endeavors.Stupid is as stupid does.At least stupid ran out when I stumbled on the problem."Asked the guy at Sniders". Share this post Link to post Share on other sites
stevasaurus 22,862 #17 Posted April 6, 2010 Can't beat a great thread with a great outcome...nice to have one of those old timers around yet. :omg: Share this post Link to post Share on other sites
Gerry w 2 #18 Posted April 6, 2010 Not stupid, who would have thought of spark gap?? Not I, not a lot of folks I'd bet! Glad to hear it lives!!! :omg: Share this post Link to post Share on other sites
