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Case 580n high idle issue

Cenni

New Member
Joined
Oct 6, 2019
Messages
4
Location
Nevada
I am needing some help. I have a 2013 Case 580N. When I am either running a hammer on the back or even just the bucket. Ill idle it up to my desired rpm, but just at randomly it drops back down to idle. This could be after 20 minutes of high idle, or even 2 seconds after idling up. So then i have to turn the rpm knock back down then up to get to idle back up. I have replaced the knock assembly, but still does it. Could you please help?
 

fpgm04

Well-Known Member
Joined
Dec 31, 2009
Messages
214
Location
USA
Welcome to HEF Cenni !

I assume when you say “knock” you mean the hand throttle knob assembly, correct? Was there any checks done before replacing the hand throttle? Example hand throttle voltages or percentages reported in the instrument cluster diagnostic screens, or fault log in the instrument cluster menu.

From the description, and assuming there are no fault codes or warning messages, then it sounds like the hand throttle is being deactivated due to certain normal conditions present/detected. These conditions would not generate faults that I am aware of.

Here are some initial things to check

1) Pressing a brake pedal will cause the hand throttle to be deactivated. Make sure the brake pedal switches are not out of adjustment or damaged causing a brake switch to trigger by vibration during hammering.

2) Rotating the seat will cause the hand throttle to be deactivated. Are you “fully” rotating and locking the seat when operating in backhoe mode? If you are operating the backhoe while the seat is partially rotated and not locked, the hand throttle could be deactivated as the seat rotation switch could be actuating. Also make sure the seat switch and wiring is not damaged.

Let us know what you find.
 
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