Avant 528 drive question?

[Samstree805]

Good morning. I have an avant 528 with under 300 hrs. I have had it for about 6 months. It works very well and we are very happy with it. But it doesn’t have much drive power if we hit any type of hills. It won’t even go up the trailer ramps on dump trailer unless you get a running start. Is this common for these machines? Any suggestions would be great. Thanks in advance.

 

[chiselbit]

Hydraulic fluid level low?

 

[Mick Dempsey]

Does it have 2 speeds? Are you in rabbit?

 

[Merle Nelson]

Yes it's common. My 528 has always been counter intuitive to me. When coming to a hill or going up ramps you need to back off the forward or reverse pedal. Not sure of right words exactly but more hyd flow is available by depressing it more. More torque is available by pressing it less and having less flow to the hydraulic motors.

Of course this is at any given throttle setting. And a higher throttle setting will give you more hyd flow/power as your baseline to go up or down from.

I'm sure you've noticed to do no, or less, other functions to keep as much fluid flowing to wheel motors at that time.

Yes two speed motors on the wheels would have been nice.

 

[Anonymity]

Yes it's common. My 528 has always been counter intuitive to me. When coming to a hill or going up ramps you need to back off the forward or reverse pedal. Not sure of right words exactly but more hyd flow is available by depressing it more. More torque is available by pressing it less and having less flow to the hydraulic motors.

Of course this is at any given throttle setting. And a higher throttle setting will give you more hyd flow/power as your baseline to go up or down from.

I'm sure you've noticed to do no, or less, other functions to keep as much fluid flowing to wheel motors at that time.

Yes two speed motors on the wheels would have been nice.

Yes, like he said…my 420 does quite well going up hills if you sort of back off the foot peddle and reapply it…it is a little weird…same thing I can’t get up ramps if I run it a certain way, but with experience and a little finesse it’s just fine

 

[Samstree805]

Yes I have kind of noticed this. I will have to play with it more. Pretty awesome machines though.

 

[Merle Nelson]

I used the word throttle at first too. But is that correct? Throttle is constant set by moving a lever to x position right. And higher throttle does give stronger hydraulics to a certain point. But the forward and backward foot pedals are not tied to more fuel. They are tied to higher hyd flow - faster with less torque, or backing off - slower with more torque.

I might run my engine at x comfortable rpm when doing average work and movement. Then if going to climb ramps or climb a hill I'll back off on forward or backward foot pedal and frequently push the engine rpm up a little higher than I would leave it for all the time easy going work. Thus getting more torque in two different ways.