Page 20
MMAE16 - Servce & Parts Manual
Aprl 2022
Secton 10 - Mantenance
6) Test the Key Switch
Proper key switch action and response is essential to safe machine operation. The machine can be
operated from the ground or platform controls and the activation of one or the other is accomplished
with the key switch. Failure of the key switch to activate the appropriate control panel could cause a
hazardous operating situation.
Pull out the ground red Emergency Stop button to the ON position. Turn the platform red
Emergency Stop button clockwise to the ON position.
Turn the key switch to platform control.
Check the machine functions from the ground controls.
Result:
The machine functions should not operate.
Turn the key switch to ground control.
Check the machine functions from the platform controls.
Result:
The machine functions should not operate.
Turn the key switch to the OFF position.
Test the machine functions from the ground and platform controls.
Result:
No function should operate.
7) Test the Horn
The horn is activated at the platform controls and sounds at the ground as a warning to ground
personnel. An improperly functioning horn will prevent the operator from alerting ground personnel of
hazards or unsafe conditions.
Turn the key switch to platform control. Pull out the ground red Emergency Stop button to the
ON position. Turn the platform red Emergency Stop button clockwise to the ON position.
Push down the horn button at the platform controls.
Result:
The horn should sound.
8) Test the Drive Brakes
Tools will be required to perform this procedure.
New parts will be required to perform this procedure.
Proper brake action is essential to safe machine operation. The drive brake function should operate
smoothly, free of hesitation, jerking and unusual noise. Released individual wheel brakes can appear
to operate normally when not fully operational.
Perform this procedure with the machine on a firm level surface that is free of obstructions, with the
platform extension deck fully retracted and the platform in the stowed position.
Mark a test line on the ground for reference.
Turn the key switch to platform control. Pull out the ground red Emergency Stop button to the
ON position. Turn the platform red Emergency Stop button clockwise to the ON position.
Lower the platform to the stowed position.
Press the drive function select button.
Choose a point on the machine; i.e., contact patch of a tire, as a visual reference for use when
crossing the test line.
Bring the machine to top drive speed before reaching the test line. Release the function enable
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