New Holland T8010 Manual page 1527

PTO Is Configured As A Single Speed And Shaft Size Frequency Was
Detected When The PTO Was Switched On, Shaft Size Frequency Input Is
Only Used For Two Speed PTO
Cause:
The module is receiving frequency from the shaft size sensor when configured as a single speed PTO tractor.
Possible failure mode:
1. The PTO system is equipped with shaft size frequency but configures as single speed system.
2. PTO shaft size sensor is not well connected or failed.
PTO SHAFT SPEED SIGNAL
The PTO shaft speed frequency is derived from a variable reluctance speed sensor in the transmission. The clutch
speed sensor is connected directly to the AUX/Hitch/PTO control module in all versions of the PTO control system.
The sensor output is directly proportional to PTO clutch output speed, and is a quasi-sinusoidal wave form the
amplitude of which is non-linearly proportional to speed. The amplitude range of the signal is from 3 volts peak-to-
peak to 80 volts peak-to-peak centered around chassis ground. Frequency range is from zero to 3,200 Hz worst
case.
PTO SHAFT SIZE SPEED SIGNAL
The PTO shaft size speed frequency is derived from a variable reluctance speed sensor in the transmission. The
sensor is connected directly to the AUX/Hitch/PTO control module and its output is proportional to PTO clutch
output speed, but scaled differently from the PTO clutch speed signal depending upon which PTO shaft is in use.
i.e. 1-3/4" 1000 RPM, 1-3/8" 1000 RPM or 1-3/8" 540 RPM. The signal is a quasi-sinusoidal waveform the
amplitude of which is non-linearly proportional to speed. The amplitude range of the signal is from 3 volts peak-to-
peak to 80 volts peak-to-peak centered around chassis ground. Frequency range is from zero to 760 Hz worst
case.
Solution:
The tractor is equipped with dual speed PTO system. Reconfigure/calibrate the system as a two speed PTO
system.
NOTE: See schematic sections 49 and 50 on the schematic poster.
Section 55 - Electrical System, Controller - Chapter 3
AUX/HITCH/PTO FAULT CODE 180
55-3-108