Page 26
Mast Seres - Servce & Parts Manual
May 2021
Secton 10 - Mantenance
Maintaining the limit switches is essential to safe operation and good machine performance.
Operating the machine with a faulty limit switch could result in reduced machine performance and a
potentially unsafe operating condition.
Perform these procedures with the machine on a firm, level surface that is free of obstructions.
Turn the key switch to ground control.
Turn the select switch to outdoor.
While raising the platform from the ground controls, push in the roller of the lower up limit switch
to activate the limit switch.
Result:
The platform stops raising. The machine is functioning properly.
Result:
The platform continues to raise. Adjust or replace the up limit switch.
Lower the platform to the end.
Turn the select switch to indoor.
While raising the platform from the ground controls, push in the roller of the upper up limit switch
to activate the limit switch.
Result:
The platform stops raising. The machine is functioning properly.
Result:
The platform continues to raise. Adjust or replace the up limit switch.
8 - Test the Key Switch
This procedure is to be performed every 3 months or every 250 hours, whichever comes first.
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.
Perform this procedure from the ground using the platform controls. Do not stand in the platform.
Pull out the red Emergency Stop button to the ON position at both the ground and platform
controls.
Turn the key switch to platform control.
Check the platform up/down function 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.
Result:
No function should operate.
9 - Test the Automotive-style Horn
This procedure is to be performed every 3 months or every 250 hours, whichever comes first.
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.
1.
2.
3.
•
•
4.
5.
6.
•
•
1.
2.
3.
•
4.
5.
•
6.
•
