4
MERCURY SWITCH TO MICROSWITCH RETROFIT KIT KA349WE INSTALLATION INSTRUCTIONS
MN280022EN October 2015
Remove microswitch switch SW1
otee:
N
SW1 refers to the switch position. The existing
microswitch is removed from the switch SW1
position and reinstalled in the switch SW2 position.
1. Loosen switch SW1 terminal screws and detach cable
wire (Figure 5).
Figure 5. Terminal and mounting screws on switch SW1.
2. Remove hardware holding SW1 mounting plate to
frame. Lift plate from frame. Save nut and lockwasher.
3. Remove hardware holding switch to mounting plate.
Save hardware and switch for later use. Discard
mounting plate.
4. Remove and retain cable from switch.
Remove mercury switch SW3
WARNING
Hazardous material. Do not open mercury switches or
come in direct contact with switches exhibiting any
sign of mercury leakage. Exposure to mercury can cause
serious health problems.
T281.0
1. Use a punch to drive out the roll pin that is holding
switch SW3 and mounting block to main shaft (Figure
6). Discard roll pin.
2. Remove mounting block and attached switch assembly.
Remove and discard mounting block. Dispose of
mercury switch following local hazardous waste
procedures.
IMPORTANT
SW2 and SW3 switches contain mercury. Dispose of these
switches in accordance with all federal, state, and locally
approved mercury disposal guidelines and regulations.
Figure 6. Removing switch SW3 from main shaft.
Figure 7. Springs and retaining pins.
Remove mercury switch SW2
WARNING
Hazardous material. Do not open mercury switches or
come in direct contact with switches exhibiting any
sign of mercury leakage. Exposure to mercury can cause
serious health problems.
T281.0
Remove springs
otee:
N
Position of existing spacers and washers.
1. Detach and discard two C rings from spring retaining
pin at outer frame (Figure 7). (Oil-interrupting unit with
two spacers shown. Vacuum units have no spacers
here.)
2. Slide spring retaining pin aside until able to detach the
two large springs from the spring retaining pin.
3. Detach the upper small spring from the retaining pin in
the handle shaft assembly as shown in Figure 7.
4. Remove and discard two C rings from the retaining pin.
5. Remove and save retaining pin.
6. Detach the two, small lower springs from retaining pin
marked ‘pin’ in Figure 7.
7. Remove and retain the two spacers and pin.
!
!
Screws holding mounting
plate to frame
Mounting plate
Switch SW1 Cam
Screws holding
microswitch to
mounting plate
Mercury Switch
Cable
Terminal screws
Lower two small springs, detach here
Upper small spring, detach here
Handle Shaft
Mercury Switch
Spring retaining pin, stip 1
Two large springs, attached
to spring retaining pin
Spacers
C Ring
Pin
Spacers
Switch SW3
Roll pin
Mounting block
