3320 throttle issue

[GreatWhitehunter]

I'm coming up on 350hr on my 3320 and it has been relatively problem free. But this one seems non typical. I actually noticed it a few weeks back but dismissed it as nothing. While climbing my steep drive in A range with cruise on and 20k on the tac, it seems to surge slightly almost as if the load match was having issue monitoring rpms.

After I got topside I shifted to B and lowered the rpms to about 18. I normally keep it around 18 for driving back an forth to piles or when not "working " it. Yesterday while boxblading it seemed to again have issue with throttle position. I was at 20k with the tac in B and if I lowered the rpm an depressed the hydro pedal(forward and backwards) it barely moved. But if I went to idle on the throttle and back to say 15 or 18 it was fine. I had an error about a year back in relation to the sensor that monitors the engine speed for load matching. It's located near the oil filter on the right side.

It seemed to have wiggled loose from it's connections. Simple fix was to seat it properly and that was it. So at this point I'm wondering if this sensor is on the blink. I tried to calibrate the pedals according to a procedure posted here.
(turn key to on, but don't start engine. Then depress each pedal one at a time for 60 sec). It didn't seem to have any affect. I was concerned that it was the hydro pump but I don't see any evidence of that in the loader or 3pt hitch functions.

So if anyone has any bright idea's, let me have em. I'm getting no error codes and all else seems to be operating sat. I did a hydro fluid and filter change in June of the year.

Matt:confused2:

 

[Cocre]

Had a similar issues with my 3320 a couple of years ago, calibrating the throttle position sensor fixed it. Turn LoadMatch off and see if the problem goes away, if so most likely you need to do the same.

Calibrating the sensor is done mostly from the operator's station, with the engine off. It is a bit too complex to explain here, so I recommend that you buy the technical manual. It is a great resource. Great read, one of the best books I have ever read, honest.

 

[GreatWhitehunter]

So you saying the steps I listed aren't all that's involved?

Matt

 

[Cocre]

If you have the standard eHydro the directional pedals do not control the throttle, I am not familiar with the auto HST which may. I find nothing in the technical manual about depressing the pedals for a period of time to calibrate the sensor.

The sensor near the oil filter is most likely the throttle position sensor and not an engine speed sensor. The throttle position is used in combination with such things as engine speed, tractor speed, pedal position and etc to determine how LoadMatch and other things should operate.

To calibrate any of this things will typically require a "password" and is not done just by pressing a pedal. To do the throttle sensor, you enter the password and go into the sensor calibrate mode, move the throttle around taking readings displayed on the dash. If the min to max reading fall out of a certain range, you replace the sensor. If the range is OK you rotate the sensor to obtain the correct values when the throttle is full slow and full open. Sounds complicated, but it isn't. Might take 30 minutes the first time, next time, five.

Hope this helps, a bit.

 

[Cocre]

I was wrong, to calibrate you do press pedals and move levers. What I did was adjust, not calibrate.

From the TM....

eHydro/Auto HST - Single Sensor Calibration
Reason:
To calibrate the electronic drive controller to a sensor if a
single sensor (throttle position sensor, forward pedal
sensor, or reverse pedal sensor (eHydro only)) has been
adjusted or replaced.
Note: Although the intent is to calibrate one sensor, all
listed sensors will have to be cycled through their
complete range of motion to properly complete this
procedure.
Test Conditions:
Operator on seat
Park brake locked
Range transmission in neutral
Key switch in the run position, engine not running
MFWD disengaged
Max speed/cruise switch off
Motion match switch in short rollout position (if installed)
FNR lever in neutral position (Auto HST only)
Procedure:
1. Verify that both the high and low engine rpm are set to
specification before starting calibration.
2. Disconnect all sensors for 10 seconds.
Throttle position sensor
Forward/drive pedal sensor
Reverse pedal sensor (eHydro only)
3. Reconnect all sensors.
4. With an operator on the seat, place the range
transmission in neutral, and disengage the MFWD.
5. Place the load match (eHydro only) and cruise control
switch in the off position and the motion match switch (if
installed) in the short rollout position.
6. Verify the throttle lever is in the low idle position and the
drive pedal(s) are released.
7. Turn the key switch to the run position.
8. Wait 3 - 4 seconds, then move the control to be
calibrated to the extreme opposite position and wait 3-4
seconds.
throttle lever to the high idle position
forward/drive pedal to the full speed position
reverse pedal to the full speed position (eHydro only)
9. Move the control being calibrated back to the original
position. Repeat this procedure for all remaining sensors
regardless if it was the sensor being calibrated or not.
throttle lever to the low idle position
forward/drive pedal to the released position
reverse pedal to the released position (eHydro only)
10.Wait 1 - 2 seconds before turning the key to off or
starting the engine.
11.If the sensor does not calibrate or there are two or more
sensors to calibrate, See 蜈皐ydro - Electronic Drive
Controller System Calibration on page 349 or 驗*uto HST -
Electronic Drive Controller System Calibration on
page 350.

 

[fuseboxer]

Looks complicated. Bet most modern elec JD are using the same technique to calibrate. After you do it a few times it must get much eaiser.

 

[GreatWhitehunter]

Croce, thanks a lot for that. I'm going to buy the manual I think. Do I do the cal on each sensor ,starting at #1 for each? Or cal each and just wait the 3 to 4 sec between each?

 

[fuseboxer]

You wrote: 2. Disconnect all sensors for 10 seconds.
Throttle position sensor
Forward/drive pedal sensor
Reverse pedal sensor (eHydro only)
3. Reconnect all sensors.
Question= Would disconnection the battery positive for 1-minute the reconnecting cover #2 and #3? Looks like it would to me.

 

[GreatWhitehunter]

Yikes, they don't give those tech manuals away do they? Should I go with the cd or paper? Seems like I could print off the pages I need and take them with me. That way if I spill something on them I could just print more.

Matt

 

[Cocre]

The manual is a bargain for the information it contains. I bought the PDF version. Contains theory of operation for all major components, detailed schematics, breakdowns and rebuilds. I read it at the breakfast table while eating the Cheerios. I am a nuts and bolts kinda of guy and find this manual just wonderful.

As to the calibration, it reads to me at step eight to set the key to the run position, wait abit (3 to 4 secs) for the system to see the low positions of the sensors, then move the throttle to full open, wait, move to full slow. Then press the forward pedal, wait, release. Press reverse pedal, wait, release. Wait, then turn the key off.