Bearcat BC-502/CRC, Instruction Manual

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BC-502/CRC
130
a. Unbolt the companion flanges from the pump and detach the
drive shaft.
b. Remove the key from the pump shaft. It can be pried out by using
a punch and hammer.
c. Remove three Allen head cap screws and take off the seal
retainer.
d. Remove both seals and discard them.
e. Apply a thin coating of Lubriplate No. 105 or equivalent grease to
the new seals.
f. Use emery cloth or fine sandpaper to smooth the pump shaft so
there are no burrs or rough spots.
g. Insert the larger asphalt seal into the pump.
h. Install a new dust seal in the retainer with the seal lips facing
outward.
i. Replace the seal retainer, with the seal facing outward, and
tighten the cap screws securely. This will seat the inner seal.
j. Replace the shaft key, drive shaft, and companion flange.
Tighten the bolts securely.
Replace Nozzle Valve Stem Seals
The spray nozzle valves are equipped with seals and O-rings that require
replacement if leaks develop.
a. Close Valve E and drain the spray bar.
b. Use a wrench to remove the seat bushing of the leaking valve.
The bushing is located on the underside of the spray bar.
c. Remove the locking nut from the top of the valve. Take off the
lifting finger and put it aside.
d. Push the valve stem assembly down through the seat hole and put
it aside.
e. Remove the snap ring from the valve hole. Use snap ring pliers
only. Then remove the washer.
f. Remove the O-ring and the seal and discard them.
g. For this and the following steps, use the two piece seating tool
(available from BearCat; P/N MSC-27280 and MSC-27281). Place
the shorter seating tool in the valve seat on top of the spray bar.