Preventive Maintenance
Chapter 6: General Procedures
Page 6 - 6 Retractable Bed Service Manual
6
Preventive Maintenance Schedule
Table 6-1. Preventative Maintenance Schedule
Function Procedure
Head limits Run the head function to the upper and lower limits to
ensure proper function of the limit switches.
Knee limits Run the knee function to the upper and lower limits to
ensure proper function of the limit switches.
Hilow limits Run the hilow function to the upper and lower limits to
ensure proper function of the limit switches. Some vin-
tage P8400 beds are equipped with a spherical spacer to
prevent the bed from crashing during operation. Inspect
the spacer for cracks, wear, etc. Replace if necessary.
Contour limit When the head section is activated from the flat posi-
tion, the knee will raise to 15° to form a contour posi-
tion. This function is defeated by the knee lockout
switch.
Trendelenburg limits Run the bed into both Trendelenburg and Reverse
Trendelenburg to check the limits. Check the degree
indicator for accuracy.
Drive screws Inspect, clean, and lubricate the head, knee, and hilow
drives.
Hilow brake spring The hilow brake spring requires periodic cleaning.
Grease and other lubricants find their way to the brake
surface. This can cause the hilow to slip.
Lockout switches Test each lockout individually to ensure proper opera-
tion.
Brake and steer Test the brakes to determine if the bed moves when the
brake is activated. Adjust if required. Inspect the steer
activation, and adjust if required.
Caster tires Check caster tires for cuts, wear, tread, etc. Replace if
necessary.
Siderail controls Test the switches in the siderails for proper operation.
Also check for momentary operation at this time.
Siderail frame Test the siderail for proper latching. Adjust if required.
Pivot points Lubricate all pivot points on the bed.
Power cord and plug Check the cord and plug for cuts, nicks, or breaks.
Replace if required.
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