Muffler, Connector Block And Hose Assembly; Poa V A L V - Chevrolet 10 Series 1970 Service Manual

Installation
1. Mount the expansion valve to the bracket.
2. Connect the inlet and outlet connections.
the in let pipe clamp.
3. Connect the equ alizer line to the P O A using new
" O " ring coated with clean re frig e ra tio n o il and
mount the ca p illary bulb to the evaporator outlet
pipe.
4. Connect b attery ground cable.
the system . Check p erform ance.
MUFFLER, CONNECTOR BLOCK & HOSE ASSEMBLY
(Fig. 4 2 )
The m u ffler, connector block and com p ressor inlet and
outlet hoses must be rep laced as a unit.
Replacement
1. P u rge the system .
2. Disconnect the outlet hose at the condenser in let pipe
and the co m p ressor in let hose at the P O A valve. Cap
o r tape the open connections at once.
" 0 " ring seals.
3. R em ove the connector block to com p ressor bolt and
rem o ve the m u ffler, hoses and connector block.
o r tape the open connections.
seals.
4. A s sem b le the new connector block to the com pressor
using new "O " ring sea ls coated with clean r e fr ig e r a ­
tion oil. Tighten the connector block bolt to 20 ft.
lbs.
5. Attach the com p ressor in let and outlet hoses at the
Tighten
POA VALVE
Removal
Evacuate and charge
D iscard the
Cap
D iscard the "O " ring
HEATER AND AIR CONDITIONING 1A-33
P O A va lve and condenser inlet pipes using new "O "
ring sea ls coated with clean re frig e ra tio n oil.
6. Evacuate, charge and check system operation.
1. Disconnect battery ground cable and purge the system .
2. Rem ove evaporator o il bleed line and expansion valve
eq u alizer line. Cap the connections.
Assem bly (T y p ic a l)
CHEVROLET TRUCK SERVICE MANUAL