PLATE AS 8X4467 - Caterpillar

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Install guards (70) and flap (71) to the side guard using bolts (73), hard washers (72) and spacers (75).
Install guards (74) to both sides of the stairway using a spacer (75), hard washer (72) and bolt (73).
Install pin assembly (68) to the top of the side guard and retain using a pin assembly (69).Fill Hydraulic System and Purge Air
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Fill the hydraulic system with the designated oil based on the ambient temperatures that the machine will be operating in. This information can be found in the Operations and Maintenance Manual for the machine or use the quick reference table listed below. The fill port is located above the side cover and the level can be monitored through the sight gage hole in the side cover.
Once the sight gage shows acceptable level, cycle the system a few times to purge the air out of the cylinder and reservoir. After, cycling a few times the hydraulic system check the fluid level and refill if needed.
Align and apply final torque to handrails when the stairway is in the upright position.
Align and adjust locking pin.
Table 17
Quick Reference
Compartment or System Oil Type and Performance Requirements Oil Viscosities °C
Min Max °F
Min Max
Powered Stairway Cat TDTO
Cat TO-4 SAE 10W 0 50 32 122
Cat Cold-Weather TDTO SAE 0W-20 0 50 32 122
MIL-H-5606A MIL-H-5606A -40 40 -40 104 Software
The Powered Access System software enables the visual and audible warnings for the operator. If the stairway is not in the full upright position with the latch fully extended when the machine parking brake is disengaged, the warning will engage.
To enable the software go to the transmission ECM and turn on the Powered Access feature.
Test the warning system by leaving the stairway lowered and disengage the parking brake. An audible and visual alarm should trigger.Switch Status - Check
Introduction
The following machine check will check the distance between the position switch and the crank for the powered access stairway.Check Preparation
Move the machine to a smooth horizontal location. Move away from any machines that are working and any personnel.
Move the transmission control to the NEUTRAL position.
Activate the parking brakes. Stop the engine.
Permit only one operator on the machine. Either keep other personnel away from the machine, or keep other personnel in the sight of the operator.
Place wheel chocks in front of the wheels and behind the wheels.
Make sure that the transmission is in the NEUTRAL position.
Make sure that all air pressure and oil pressure is released before any fittings, hoses, or components are worked on.Check Procedure
Ensure ladder is pinned in the upright position.
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(1) Cover
Remove cover (1) from behind the stairway. Retain all hardware.
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(A) Crank
(B) Sensor
Light on the back of the sensor (B) should turn on once the sensor is triggered by the crank (B).Note: An incorrect distance could result in false stairway down alarms.
If the distance is not correct, adjust sensor (B) accordingly.
Secure the cover (1) to the powered stairway panel.
The large front cover can be reinstalled.
Tighten all bolts to specifications.