April 2018 Maintenance Manual
Quarterly Maintenance Procedures
Part No. 1268489GT S
®
Booms • Z
®
Booms 77
7 Lower the primary boom to 66°.
Result: The reading at the display and digital
level is within ± 2° of each other and of 66°.
Result: The reading at the display and digital
level is greater than ± 2° of each other and of
66°. The primary boom angle sensor must be
calibrated. Refer to Repair Procedure in the
appropriate Service and Repair Manual for
your machine, How to Calibrate the Primary
Boom Angle Sensor.
8 Lower the primary boom to 49°.
Result: The reading at the display and digital
level is within ± 2° of each other and of 49°.
Result: The reading at the display and digital
level is greater than ± 2° of each other and of
49°. The primary boom angle sensor must be
calibrated. Refer to Repair Procedure in the
appropriate Service and Repair Manual for
your machine, How to Calibrate the Primary
Boom Angle Sensor.
9 Lower the primary boom to 32°.
Result: The reading at the display and digital
level is within ± 2° of each other and of 32°.
Result: The reading at the display and digital
level is greater than ± 2° of each other and of
32°. The primary boom angle sensor must be
calibrated. Refer to Repair Procedure in the
appropriate Service and Repair Manual for
your machine, How to Calibrate the Primary
Boom Angle Sensor.
10 Lower the primary boom to 15°.
Result: The reading at the display and digital
level is within ± 2° of each other and of 15°.
Result: The reading at the display and digital
level is greater than ± 2° of each other and of
15°. The primary boom angle sensor must be
calibrated. Refer to Repair Procedure in the
appropriate Service and Repair Manual for
your machine, How to Calibrate the Primary
Boom Angle Sensor.
11 Fully lower the primary boom until it stops at
approximately -2.6°.
Result: The reading at the display and digital
level is within ± 2° of each other and of -2.6°.
Result: The reading at the display and digital
level is greater than ± 2° of each other and of
-2.6°. The primary boom angle sensor must be
calibrated. Refer to Repair Procedure in the
appropriate Service and Repair Manual for
your machine, How to Calibrate the Primary
Boom Angle Sensor.