3-8
c. Crankshaft and Seal End Thrust Washer
1.
Two brass thrust washers are used. The pump
end thrust washer is positioned on two dowel pins located
on the bearing head and is installed with the oil pump and
bearing head assembly. The seal end thrust washer is
positioned just ahead of the seal end main bearing on two
dowel pins installed in the crankcase. Both thrust washers
should be inspected for wear and scoring before
reassembly (Refer to Table 3-2).
2.
Install the seal end thrust washer on the two
dowel pins. (See Figure 3-16) Ensure piston rods are
pushed out of the way and install the crankshaft.
CAUTION
Do not allow crankshaft to drop on connecting
rods inside the crankcase when installing the
crankshaft.
d. Bottom Plate, Strainer, and Connecting Rod Caps
1.
Do not tap piston with hammer if rings are
caught at entrance to the cylinder. Using a ring
compressor, squeeze rings sufficiently to allow piston to
be pushed down into the cylinder. Ensure that ring ends
are staggered so that the gaps are not aligned, and lightly
tap piston down into the cylinder. (See Figure 3-18) The
ring compressor can be easily fabricated from a piece of
sheet metal.
Figure 3-18. Installing Pistons
2.
Install connecting rod caps on connecting rods
using new capscrews (special) and flat washers. Reuse of
the old capscrews is not recommended. Ensure that the
caps are installed on the dowel pins. Torque capscrews to
torque value shown in Table 3-1. Ensure freedom of
movement of crankshaft after capscrews are torqued on
each rod cap.
3.
Check operation and reinstall check valves and
relief valve. (See Figure 3-11). The check valves are
free-floating devices and can easily be checked visually.
The relief valve is a spring-loaded device which can be
checked by using a small piece of stiff wire to ensure that
the spring mechanism can be depressed.
4. Clean and reinstall the oil strainer.
5.
Using a new gasket, install the bottom cover
plate. See figure 1-1 for relative location of compressor
mounting flanges. Torque cover capscrews, in a diagonal
pattern, to the torque value shown in Table 3-1.
6.
Reassembly the cylinder head, oil pump and
shaft seal (Refer to sections 3.3, 3.4 and 3.5 ).
3.8 SUCTION STRAINER
NOTE
Suction strainer has been preformed to fit into
suction cavity.
Remove and clean the suction strainer. (See
Figure 3-19) Check it for damage. If it is damaged,
replace suction strainer. Install suction strainer and
suction service valve using a new gasket.
Figure 3-19. Installing Suction Strainer
3.9 ADDING OIL
Add the proper oil charge to the compressor through
the oil fill plug. Refer to section 2.2.2 for the required oil
charge. Refer to unit operation manual for other
methods of adding oil to compressor.
3.10 INSTALLING COMPRESSOR
Refer to section 2.2.2 and the unit service manual to
install the compressor. Allow compressor to run for 4 to 5
hours before checking new shaft seal assembly for leaks.
