Table 17-2. Fuel Burning Winterization Coolant Pump Wear Limits
Item
Rotor
Rotor
Rot or
Rotor
Rot or
Blade
Blade
Blade
head diameter . . . . . . . . . . . . . . . . . . . . . .
head length . . . . . . . . . . . . . . . . . . . . . .
bore diameter . . . . . . . . . . . . . . . . . . . . . .
blade slot width . . . . . . . . . . . . . . . . . . . . . .
blade slot depth . . . . . . . . . . . . . . . . . . . . . .
height . . . . . . . . . . . . . . . . . . . . . . . . . . . .
thickness . . . . . . . . . . . . . . . . . . . . . . . . . .
width . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adapter bore diameter . . . . . . . . . . . . . . . . . . . . .
17-9. Reassembly.
Reassemble control box, heater, and kit as
illustrated in figures 17-1 and 17-2.
b. Exercise care in replacing quartz rod as it is
easily broken if dropped.
After installation, gently
move rod up and down to make sure it moves freely
in its stainless steel tube. Also make sure at least
1/32 inch extends out of tube when rod is resting on
bottom.
c.
Assemble motor assembly, combustion air
inlet, inlet plate and combustion fan, before instal-
ling burner assembly.
d. Make sure lead wire from motor assembly is
on side of blower opposite name plate before draw-
ing it through casing grommet.
e.
Make sure all wire leads are connected to
their respective terminals as tagged during disas-
sembly.
NOTE
Coolant pump cannot be assembled
completely and installed as a sep-
arate unit. It must be assembled
as it is installed on short shaft end
of motor.
f. Install seal spring and seal washer over end
of motor shaft.
Place performed packing in seal
cage, then install seal cage over end of motor shaft
with seal face facing forward.
g. Install pump adapter over motor shaft and
align holes with tapped holes in motor.
h. Install pump rotor on motor shaft and temp-
oraily tighten rotor set screw.
Place preformed
packing in groove of pump adapter. Place cam ring
17-6
Dimensional limits (inches)
I
0.904
- 0.906
0.246
- 0.248
0.3033
- 0.3038
0.0935
- 0.0945
0.263
- 0.268
0.247
- 0.249
0.091
- 0.093
0.247
- 0.249
0.315
- 0.318
in position aligning scribe mark. With motor shaft
end play taken up in direction of pump, make certain
there is at least 0. 002-inch clearance between outer
face of rotor. Move rotor back and forth as neces-
sary to produce this clearance, then tighten set
screw.
NOTE
Make sure that adapter and cam ring
are tightly compressed together when
determining 0. 002 inch clearance,
otherwise, a false reading will be
obtained.
i. Install rotor blades in rotor slots making
sure that grooves in blades face away from direc-
tion of rotation. Pump rotates counterclockwise
when viewing end of port plate.
j. Place preformed packing in groove of port
plate, then position plate against cam ring. Align
scribe marks and secure with four hex socket head
screws.
NOTE
Plug threaded ports with caps if pump
is not to be assembled in heater im-
mediately.
k. Replace all defective wiring in control box
ant-heater assembly.
l. Wiring harness
Chapter 5.
17-10. Adjustments.
Remove wire tags.
repair and rebuild. Refer to
a. Coolant Pump Relief Valve. The coolant pump
relief valve is a non-adjustable relief valve. The
valve is set to relieve pressure at 30 to 35 psi. To
assure proper functioning of this valve, spring must