Bendix Commercial Vehicle Systems BENDIX 720CC COMPRESSOR - Manual (Page 10)

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These items are also referenced in the following procedures
and are denoted by the numbers in parenthesis.
CYLINDER HEAD, COOLING PLATE & VALVE
PLATE ASSEMBLY
1. Remove the sealing ring (2) and discharge safety valve
(1) from the compressor cylinder head.
2. Remove the two short hex head screws (4) and eight
long hex head screws (3) from the compressor cylinder
head.
3. Gently tap the cylinder head, cooling plate and valve
plate assembly with a soft mallet to break the gasket
seal between the valve plate assembly and the
crankcase. Lift the cylinder head — with cooling plate
and valve plate assembly — off the crankcase.
4. Remove the metal inlet reed valve gasket(7).
5. Remove the two crankcase o-rings (8) from the deck
(top) of the crankcase. The o-rings are located in
countersunk holes, one on each side of the cylinder
bores.
6. Gently tap the removed cylinder head, cooling plate
and valve plate assembly with a soft mallet to break
the gasket seals. Then separate the cylinder head from
the cooling plate and valve plate assembly and remove
and discard the two head gaskets (5) and (6).
CRANKCASE FRONT COVER
1. Remove the cover (9) from the front of the crankcase.
Use a sharp, flat head screw driver or a scraper. Place
the edge under the lip along the outside diameter of
the cover. Pry the cover from the cast surface until the
cover can be removed. Refer to Figure 10.
CRANKCASE SIDE COVER
1. Remove the six cap screws that secure the crankcase
side cover to the crankcase.
2. Gently tap the crankcase side cover with a soft mallet
to break the gasket seal between the crankcase side
cover and the crankcase. Remove the crankcase side
cover and the gasket (11).
REAR END COVER
1. Note: There are two cap screws used to retain the
end cover to the crankcase. There a two longer cap
screws (not shown in Figure 9) that are used to retain
the auxiliary drive unit (e.g. hydraulic pump) via the end
cover and torqued into the crankcase. If the auxiliary
drive unit has already been removed, these two cap
screws are no longer present on the end cover. Refer
to Figure 8 to see location of the cap screws in the end
cover.
2. Remove the two end cover cap screws that secure the
rear end cover to the crankcase.
3. Remove the rear end cover from the crankcase.
Remove and discard the o-ring (10) from the end cover.
CLEANING OF PARTS
GENERAL
All parts should be cleaned in a good commercial grade of
solvent and dried prior to inspection.
CRANKCASE
1. Carefully remove all sealant gasket material adhering
to the machined face of the crankcase. See Figure
3. Make certain not to scratch or mar the mounting
surface. Note: Keep the crankcase opening covered
to prevent any of the sealant material from entering.
FIGURE 9 - REAR END COVER ATTACHMENT BOLTS
M10x1.5
Cap
Screws
(Larger)
M8x1.25
Cap
Screws
(Smaller)
FIGURE 10 - FRONT COVER
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