Figure 67. Typical Air Compressor; Figure 68. Puller Backing Plate - Carrier 69NT40-489-100 Series Operation And Service Manual

1. Air Compressor
2. Power Plug
3. Tube Connection
4. Screw (1/4-20 x 1-1/2 lg)
5. Flat Washer (1/4)
6. Locknut (1/4-20)
7. Wire Tie
8. Bolt (5/16-18 x 3/4 lg)

Figure 68. Puller Backing Plate

b. Disconnect the discharge manifold hose from the
lower head (swivel end). MAKE SURE NOT TO DIS-
TORT THE MANIFOLD TUBING.
c. Loosen the hose clamp on the clear PVC tubing that
is connected to the brass elbow on the cylinder head,
and then disconnect the PVC tubing from the elbow.
d. Disconnect the crankcase vent tubing (black) from
both cylinder heads.
e. Remove the four 1/4 inch socket head cap screws
from the cylinder heads. Remove the cylinder heads
being careful not to drop the heads or to damage the
machined surfaces. 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 CYL-
INDER HEAD!
15
9. Flat Washer (0.320/0.330)
10. Locknut (5/16-18)
11. Compressor Mounting Bracket
12. Bolt (3/8-16 x 1.00 lg)
13. Flat Washer (3/8)
14. Hose Clamp
15. PVC Tube ,1.00 inch OD

Figure 67. Typical Air Compressor

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8
12
9
13
10
11
14
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f. Remove four 1/4 inch socket head cap screws secur-
ing each cylinder sleeve to the crankcase. Remove
the cylinder sleeves.
g. Remove the four 1/4 inch socket head cap screws
from the front crankcase and remove the front of the
crankcase housing.
h. Remove the piston skirts from the pistons (two per
piston).
i. Removal of the piston rings is accomplished by
grasping a ring near its gap and lifting one side of the
ring out from the piston ring groove.
Care must be taken during ring removal be-
cause rings are very brittle.
Continue lifting the ring in a circular motion until the
ring has been completely removed. Repeat this pro-
cess until all four piston rings are removed. Then re-
move the four piston ring expanders.
j. Check to be sure that the motor shaft is rotated so that
both of the pistons are at top dead center and insert
the puller backing plate. Position the puller backing
plate (or bearing puller) so that the slot slides over the
motor shaft behind the inboard connecting rod as-
sembly.
k. Gently position the puller jaws behind the puller back-
ing plate and line up the threaded puller rod with the
center of the motor shaft. Hand-tighten the puller rod.
Place a shop rag around each piston to prevent dam-
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5
6
1
7
3
2
CAUTION
T-305