Bendix Commercial Vehicle Systems 720CC COMPRESSOR - Manual (Page 12)

12
Note: To assist with correct installation, the alignment
bushings in the cooling plate only fi t into two of the four
corner head bolt holes on the valve plate assembly and
the cylinder head.
7. Install the eight long hex head cap screws (3) into the
cylinder head. Note: A light fi lm of oil should be
applied to the threads of these cap screws prior to
installing. Oil should not be applied to any of the
other hardware.
8. Install the two short hex head cap screws (4) into the
cylinder head. Important: The two short hex head
cap screws (4) must be installed in hole positions
designated as sequence “6,16” and “5,15” in Figure 11.
9. “Snug” all the hex head cap screws, then tighten to a
torque of between 265 to 292 inch pounds (30-33 Nm)
using the torque sequence defi ned in Figure 11.
10. Install the washer (1) and safety valve (2) in the side
(discharge) port identifi ed by the number '2' on the
cylinder head (3) as shown in Figure 11, then tighten
to a torque not to exceed 66 foot pounds (90 Nm).
INSTALLING THE COMPRESSOR
1. Apply a liquid gasket sealant to the compressor /
engine mounting interface (Refer to Figure 3 for
compressor mounting face). Follow the “Engine or
Vehicle Manufacturers guidelines for the proper liquid
gasket sealant material and application procedure.
2. Secure the compressor on the engine mounting
interface using the six mounting bolts. NOTE: There
are two short bolts and four long bolts. Be sure the use
the proper length bolt for the crankcase bolt holes. Run
each of the bolts down fi nger tight, making sure not to
smear the liquid gasket material on the sealing surface.
Once the bolts are all fi nger tight; tighten the mounting
bolts per Engine Manufacturers recommended torquing
sequence and torque requirements.
3. Install any supporting brackets on the compressor in
the same position(s) noted and marked during removal.
4. Inspect all air and coolant lines and fi ttings before
reconnecting them to the compressor. Make certain
o-ring seals are in good or new condition, the threads
are clean and the fi ttings are free of corrosion. Replace
as necessary.
5. Install the discharge and coolant fi ttings, if applicable, in
the same position on the compressor noted and marked
during disassembly. See the Torque Specifi cations for
various fi tting sizes and types of thread at the rear of
this manual. Tighten all hose clamps.
6. Before returning the vehicle to service, perform
the Operation and Leakage Tests specifi ed in this
manual. Pay particular attention to all lines and hoses
disconnected during the maintenance and check for air,
oil, and coolant leaks at compressor connections and
the compressor engine interface. Also check for noisy
operation.
FIGURE 11 - CYLINDER HEAD BOLT TORQUE SEQUENCE
1, 11 9, 19 3, 13 7, 17
6, 16 5, 15
4, 14 8, 18 2, 12 10, 20
Sequence Torque (In-lbs) Torque (Nm)
1 through 10 177 20
11 through 20 265-292 30-33