the shaft. With a spring scale apply a 5 pound pull in line with the plunger. Install new drive shaft
bearings (51) if the side play is more than 0.005 inch.
(c) Clamp a dial indicator on the base with its plunger against the end of the shaft. Move the shaft to its
two extreme positions and read the total end play. End play can also be measured with a flat feeler
gage inserted between the drive coupling (2) and lower drive shaft thrust washer (3). If the end play is
less than 0.003 inch, tap the lower end of the shaft to loosen. If the end play is more than 0.010 inch,
remove the coupling and install additional thrust washers between the base assembly and coupling.
(3) Repair.
(a) Remove the coupling rivet (1) and take the drive Coupling (2) off the shaft. Take off the lower drive
shaft thrust washer (3), and remove the burr from the rivet hole in the shaft. Pull the shaft out of the
base assembly and remove the upper drive shaft thrust washer (8), shaft seal (8), and seal washer
(7). Measure the inside diameter of the bearing; replace the bearings if this diameter is greater than
0.505 inch. Drive out the old bearings with an arbor press (par.179) or bolt that rests on the bearing
without gouging the bearing bore.
(b) Install the new bearings of correct size to give proper bearing diameter (0.4995 0.500), and press the
bearings into place with an arbor press. Install the lower bearing flush with the bottom of the base;
install the upper bearing flush with the face of the bearing bore. Continue the oil hole in the base
through the :bearing, using a drill of the same diameter. Remove all burrs from the inside of the
bearing. Do not mar the bearing.
(c) Soak the bearings in engine oil and drain off the excess oil. Do not get oil into the upper part of the
base.
(d) Install the seal washer (7) and shaft seal (8) in the top of the bearing bore.
(e) Grease the upper drive shaft thrust washer (9) and install it on the shaft. Place the shaft in the
bearings and install the lower drive shaft thrust washer (3) and collar. Drill the rivet hole in the shaft to
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