Massey Ferguson 14.03.01 – TRANS1: High Pressure Brake System Pressure Too Low

Issue description

The onboard diagnostic (OBD) system has detected that the hydraulic pressure within the high-pressure brake circuit has dropped below the acceptable operating threshold.

Applies to these machines

7714
7715
7715S
7716
7716S
7718
7718S
7719
7720
7720S
7722
7722S
7724
7724S
7726
7726S
Tier 4 (2015-2021)
5611
5612
5613
5709
5710
5711
5712
5713
6614
6615
6616
6713
6714
6715
6716
6718
7615
7616
7618
7619
7620
7622
7624
8660
8670
8680
8690
8727
8730
8732
8735
8737

Check the cause

Verify if the high-pressure brake system actually has low hydraulic pressure by checking for leaks or a failing pump
Test the brake pressure sensor to determine if it is sending a faulty reading to the TRANS1 module

Repair steps

Refer to service manual
Refer to the specific Massey Ferguson service manual for the tractor model being worked on or contact a qualified technician for proper resolution.
Replace sensor
If the sensor is determined to be at fault, replace the high-pressure brake sensor on the transmission/brake circuit.

Parts you might need

(3)

Trailer Brake Pressure Sensor
G716970020055
Alternate/superseded numbers: G716970020052, G716970020051, G716970020050. Used on the air/trailer brake system for 5700, 6700, and 7700 series Dyna 6 tractors.
G716970020055

Handbrake Pressure Sensor
ACX2770930
Fits 6600, 6700, 7600, 7700, 8600, and 8700 series Dyna 6 tractors.
ACX2770930

Handbrake Pressure Sensor
4289997M1
Fits 6600, 6700, 7600, 7700, 8600, and 8700 series Dyna 6 tractors.
4289997M1

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