Carrier 69NT40-541-300, Операция и обслуживание, Страница: 94 / 152

6 − 6 T − 318
6.8.2 Compressor Disassembly
WARNING
Before disassembly of any external com-
pressor component make sure to relieve
possible internal pressure by loosening the
bolts and tapping the component with a
soft hammer to break the seal.
CAUTION
Removing the compressor motor press-fit
stator in the field is not recommended. The
rotor and stator are a matched pair and
should not be separated.
When disassembling compressor, matchmark parts so
they may be replaced in their same relative positions
(see Figure 6-5). Refer to Table 6-7 and Table 6-8 for
compressor wear limits and bolt torque values.
a. Place the compressor in a position where it will be
convenient to drain the oil. Remove the oil fill plug
(see Figure 6-5) to vent the crankcase. Loosen the
drain plug in bottom plate and allow the oil to drain out
slowly. Remove the plug slowly to relieve any crank-
case pressure. Some units have a plug in the bottom
center of the crankcase, which may be removed for
draining the motor end more quickly.
1 2 3 4 5 7
6
JACK HERE
1. Cylinder Head Gasket
2. Discharge Valve
Screw & Lockwasher
3. Discharge Valve Stop
4. Discharge Valve
5. Valve Plate
6. Valve Plate Assembly
7. Valve Plate Gasket
Figure 6-6 Exploded View of Valve Plate
1
2
3
4
5
1. Oil Pressure Relief
Valve
2. Oil Return Check
Valve
3. Oil Suction Tube
4. Cap screw
5. Connecting Rod and
Cap Assembly
Figure 6-7 Bottom Plate Removed
b. Loosen cylinder head cap screws. If the cylinder head
is stuck, tap the center of the cylinder head with a
wooden or lead mallet. Do not strike the side of the
cylinder head. Be careful not to drop the head or dam-
age the gasket sealing surface. Remove cylinder
head bolts and gasket (see Figure 6-6).
c. Remove valve stops and valves. After they have been
removed, free the valve plate from the cylinder deck
by using the outside discharge valve hold-down cap
screw as a jack screw through the tapped hole of the
valve plate. Remove the valve plate gasket.
d. Turn the compressor on its side and remove the bot-
tom plate oil suction screen and screen hold down
plate. Inspect the screen for holes or an accumulation
of dirt. The screen can be cleaned with a suitable sol-
vent.
e. Match mark each connecting rod cap (see Figure 6-7)
and connecting rod for correct reassembly. Remove
the bolts and connecting rod caps. Push the piston
rods up as far as they will go without having the piston
rings extend above the cylinders.
CAUTION
The copper tube, which connects to the oil
suction strainer extends out the bottom
with the bottom plate removed. Take pre-
cautions to avoid bending or breaking it
while changing crankcase positions.