Hill-Rom P870, Manual

Page: 120 / 231

4.3 Manual Knee Drive Assembly
Chapter 4: Removal, Replacement, and Adjustment Procedures
Resident
TM
LTC Bed Service Manual (man136rc) Page 4 - 13
4
4.3 Manual Knee Drive Assembly
Tools required: Needle nose pliers Phillips head screwdriver
Crescent wrench Lithium grease (P/N SA3351)
Removal
WARNING:
Only facility-authorized maintenance personnel should perform
maintenance procedures on the Resident
TM
LTC bed. Otherwise,
personal injury can occur.
1. Remove the mattress from the bed.
2. Set both brakes on the bed by fully depressing the brake pedals located on
both sides of the swivel caster frame assembly at the foot end of the bed. If
the brake design has interconnecting linkage, both brakes are applied when
either pedal is depressed. Give the bed a solid tug to ensure the brakes are
set.
3. Adjust the bed sleep surface to its highest position by turning the hilow
crank handle (middle handle) clockwise until it stops.
WARNING:
Electric or manual drive bed mechanisms can cause serious injury if
operated improperly. Operate the bed only when persons are clear of
the mechanisms.
4. Adjust the head and knee functions to their lowest (horizontal) positions by
turning the head and knee crank handles (left and right handles,
respectively) counterclockwise until they stop.
5. Remove the crank handle assembly for the knee drive by removing the nut
and bolt located at the base of the crank handle.
6. Remove the rue ring cotter (A) securing the knee drive assembly to yokes
on the thigh section. Remove the pin (B) (see figure 4-11 on page 4-14).