Table 17-2. Fuel Burning Winterization Coolant Pump Wear LimitsItemRotorRotorRot orRotorRot orBladeBladeBladehead 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 asillustrated in figures 17-1 and 17-2.b. Exercise care in replacing quartz rod as it iseasily broken if dropped.After installation, gentlymove rod up and down to make sure it moves freelyin its stainless steel tube. Also make sure at least1/32 inch extends out of tube when rod is resting onbottom.c.Assemble motor assembly, combustion airinlet, inlet plate and combustion fan, before instal-ling burner assembly.d. Make sure lead wire from motor assembly ison side of blower opposite name plate before draw-ing it through casing grommet.e.Make sure all wire leads are connected totheir respective terminals as tagged during disas-sembly.NOTECoolant pump cannot be assembledcompletely and installed as a sep-arate unit. It must be assembledas it is installed on short shaft endof motor.f. Install seal spring and seal washer over endof motor shaft.Place performed packing in sealcage, then install seal cage over end of motor shaftwith seal face facing forward.g. Install pump adapter over motor shaft andalign holes with tapped holes in motor.h. Install pump rotor on motor shaft and temp-oraily tighten rotor set screw.Place preformedpacking in groove of pump adapter. Place cam ring17-6Dimensional limits (inches)I0.904- 0.9060.246- 0.2480.3033- 0.30380.0935- 0.09450.263- 0.2680.247- 0.2490.091- 0.0930.247- 0.2490.315- 0.318in position aligning scribe mark. With motor shaftend play taken up in direction of pump, make certainthere is at least 0. 002-inch clearance between outerface of rotor. Move rotor back and forth as neces-sary to produce this clearance, then tighten setscrew.NOTEMake sure that adapter and cam ringare tightly compressed together whendetermining 0. 002 inch clearance,otherwise, a false reading will beobtained.i. Install rotor blades in rotor slots makingsure that grooves in blades face away from direc-tion of rotation. Pump rotates counterclockwisewhen viewing end of port plate.j. Place preformed packing in groove of portplate, then position plate against cam ring. Alignscribe marks and secure with four hex socket headscrews.NOTEPlug threaded ports with caps if pumpis not to be assembled in heater im-mediately.k. Replace all defective wiring in control boxant-heater assembly.l. Wiring harnessChapter 5.17-10. Adjustments.Remove wire tags.repair and rebuild. Refer toa. CoolantPumpReliefValve. The coolant pumprelief valve is a non-adjustable relief valve. Thevalve is set to relieve pressure at 30 to 35 psi. Toassure proper functioning of this valve, spring must
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