Hale Master Intake Valve - Manual (Page 22)

20
M
ASTER
I
NTAKE
V
ALVE
After each use:
1. Visually inspect the valve to make sure
there is no debris caught between the
valve body and valve disc.
2. If the system was operated with salt
water, foam or contaminated water,
flush valve and pump with fresh water in
accordance with departmental
procedures.
3. Cycle the valve to make sure the valve
still operates smoothly. Apply Sunoco
Ultra Prestige 2EP grease or equal to
valve disc edges and to valve bore as
necessary.
VALVE DISC REPLACEMENT:
If inspection of the valve disc indicates that
replacement is necessary order valve disc
replacement kit (Hale P/N 546-1620-00-0)
and proceed as follows:
1. To avoid damage to switch rollers,
manually rotate the valve to the half
open position. Approximately 5 turns
from either the fully open or fully closed
position. This will place the switch
sequencing slot in the valve shaft
midway between both sets of switch
rollers.
WARNING: Keep hands and arms clear
of the valve disc when valve is being
operated without suction tube strainer or
suction tube in place.
2. Remove valve handwheel and open the
operator panel.
3. Tag and disconnect the electrical wires
from the valve.
4. Disconnect the relief valve discharge
piping, air bleeder tubing, outboard
primer tubing and drain tubing from the
valve body.
5. Remove the cap screws and nuts, then
remove the suction tube and valve from
the fire pump.
6. Take the valve body to a clean work
area and clamp into a vise or other
stable work holding device being
careful not to damage the valve sealing
surfaces.
7. Remove the four 3 /
8
-16 x 2-½ inch long
cap screws that hold the gearbox to the
gearbox adapter.
8. Carefully remove gearbox (MIV-M) or
gearmotor/gearbox assembly (MIV-E)
from gearbox adapter.
NOTE: The shaft and thrust washer
(MIV-E) may come out with the gearbox.
If not, remove shaft and thrust washer.
9. Remove the two 7 /
16
-14 x 1 inch long
counterbore screws that holds the
gearbox adapter to the valve body.
Remove the gearbox adapter from the
valve body.
10. Remove the trunnion from the bottom of
the valve body using a 1-½ inch socket.
CAUTION: The stem on top of the valve
disc extends approximately 1-½ inches
into the gearbox adapter bore. The
bottom of the disc, at the trunnion end,
must be removed first and then the disc
must be slightly rotated for the stem to
clear the bore.
11. Remove the old disc from the valve
body.
5
MAINTENANCE