PREVOST LE MIRAGE XLII, Руководство по обслуживанию

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3-5 62--11052
1 Bottom Plate
2 Oil Straine
r
3 Reservoir
1
2
3
Figure 3-10. Bottom Plate Removal
1 Oil Pressure Relief Valve
2 Connecting Rod and Cap
3 Capscrew
4 Check Valves
1
4
3
2
Figure 3-11. Bottom Plate and Oil Strainer
Removed
TOP
Figure 3-12. Piston Rings Removed
c. Match mark each connecting rod cap and connecting
rod for correct reassembly. Remove the capscrews,
flat washers and connecting rod caps. It is recom-
mended that the capscrews and flat washers be dis-
carded and new capscrews (special) and flat washers
be installed during compressor reassembly. (See
Figure 3-11)
d. Push the piston rods down so that the piston rings ex-
tend below the cylinders. Remove and discard piston
rings. Use only new rings when reassembling the
compressor. (See Figure 3-12.)
3.7.2 Crankshaft and Seal End Thrust Washer
CAUTION
Do not allow crankshaft to drop on connect-
ing rods inside the crankcase when remov-
ing the crankshaft.
a. Push piston rod assemblies out of the way and
remove crankshaft and seal end thrust washer.
b. Remove and check operation of oil return check
valves (See Figure 3-11). The check valves are free
floating devices and can easily be checked visually.
c. Remove and check oil pressure relief valve (See
Figure 3-11). The oil pressure relief valve is a spring
loaded device which can be checked by using a small
piece of stiff wire to ensure that the spring can be
depressed.
d. Remove piston rod assemblies.
3.7.3 Pistons, Rods, and Rings
a. Piston and pin, and connecting rod and rod cap are
matched sets and must not be interchanged. That is,
if either the piston or piston pin is to be replaced, you
must replace both of them. Likewise, if a connecting
rod or rod cap must be replaced, both must be re-
placed.
b. Match mark and disassemble pistons, pins, connect-
ing rods, and caps. (See Figure 3-13)
1 Lock Ring
2 Connecting Rod
3 Connecting Rod
Cap
4 Cap Screw
5 Piston Pin
6 Piston
6
1
2
3
4
5
Figure 3-13. Connecting Rod, Piston, and Pin
c. Check wear dimensions of disassembled parts to de-
termine if they are worn beyond limits given in
Table 3-2.