Yard Machines Y60 Operations Instructions download pdf (Page 189)

b. Remove the pump cover which is secured

to the pump body with flat head screws.

c. Remove and discard the shaft retainer.

Place the pump (hub end down) on the base

of an arbor press.

Using a dowel slightly

press the shaft out of the pump body. The

impeller blades will bottom against the in-

side of the pump body so that the shaft is

pressed out of the impeller as well as out

of the body.

Discard the shaft and the im-

peller.

d. Turn the pump body over and apply slight

pressure to the water pump seal to remove it

from the recess in the body. Discard the

seal and the seal seat.

e. Carefully inspect the water pump body

for damage.

If the body is damaged, replace

the entire pump.

If the body is serviceable

reassemble the pump using a water pump

repair kit.

5-38. REASSEMBLY

a. Carefully wipe the carbon sealing sur-

face of the water pump seal and the mating

face of the ceramic seal seat with a soft

cloth or absorbent paper to remove all traces

of wax, grease, or oil. Use a small amount

of solvent if necessary. To provide for

initial lubrication of the seal and the seal

seat,

apply either a

1% soluble oil and water

solution or ethyoline glycol type antifreeze

to the sealing surfaces of both. Lubricate

the O.D. of the seal lightly with a soft

sealant,

such Permatex No. 3, before instal-

ling the seal in the body recess. To install

the seal,

press against the outer flange

with light pressure only to avoid damaging

the seal.

b. Place the pump body (cover end down) on

the base of the arbor press. Insert the long

end of the pump shaft through the seal care-

fully. To press the shaft into the pump body,

use a tube or pipe slightly smaller than the

O.D. of the shaft bearing, and press against

the outer race of the pump bearing until it

is seated in the pump body. Do not apply

pressure against the end of the shaft. In-

stall the shaft retainer in the groove in

the pump body.

Figure 5-33. Cylinder Sleeve Locks

c. Turn the pump body over and sup-

port the pulley end of the shaft.

Carefully slide the seal seat (rubber

insert side up) onto the shaft. Use

a tube or pipe with an I.D. slightly

larger than the I.D. of the impeller

to press onto the shaft. Start the im-

peller straight and true on the shaft

to avoid binding while it is being

pressed on. Pressure should be applied

to the inner impeller flange area

only to avoid damaging the impeller.

Allow .010-.025” (.245-.635mm) clear-

ance between the vanes and body.

After the impeller is installed, ro-

tate the shaft to ensure that the im-

peller blades do not contact the pump

body.

d. Again turn the pump over and block

against the shaft,

not against the im-

peller hub. Position the pulley on the

shaft so that the four holes align with

the threads in the pulley hub. Install

the two capscrews and torque to 70 in.

/lbs.

e. Replace the gaskets and pump cover.

5-39. INSTALLATION

a. Position pump, and new gasket,

against mounting surface of cylinder

block. Install all bolts and torque to

specifications on page vii.

b. Install and tighten V-belt . Refer

to Section

5-27

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