Carrier 07E - Manual (Page 14)

Line up keyways in stator and crankcase and
replace stator locking assembly, then drive key into
keyway and stake over keyway in stator to secure
key. When a new motor is being installed, the stator
must be drilled and a new locking pin and motor lock
bushing used (see Fig. 25 and instructions). Connect
stator leads to proper terminals on terminal plate.
Refasten terminal plate and junction box to com­
pressor. Replace motor end bell using studs for
support. Remove rubber plug (if used) from piston
head. Replace valve plate assembly, cylinder head,
and terminal plate assembly. (Torque in 12 bolts
holding terminal plate to crankcase at 30-40 ft-lb.)
PEENEO
ENOS
Fig. 25 — Stator Locking Assembly
REMOVE
1. Acorn nut and washer.
2. Back out locking pin and bushing.
REPLACE
1. Screw in locking pin bushing until it rests on
stator core.
2. Wrap a piece of tape around 3/8 in. drill bit,
2-1/16 in. from cutting edge.
3. Ream out bushing (3/8 in. drill) and drill into
stator core until tape is flush with top of
bushing. (Remove drill chips.) Back off locking
pin bushing 1/8 of a turn.
CAUTION: Before drilling, be sure stator
vent holes do not line up with locking pin
hols. Vent holes are drilled horizontaily
thru stator, and can be seen fro-n end bell
side.
4. Tap locking pin into position. (Top of bushing
should be approximately 1 /16 in. above top of
pin.)
5. Peen top of bushing over roll pin.
6. Replace washer and acorn nut.
COMPRESSOR RUNNING GEAR REMOVAL
Connecting Rod and Piston Assembly — Remove
cylinder heads, valve plate assemblies, crankcase
bottom cover plate, oil filter screen, and connecting
rod caps (Fig. 26). (Label caps and rods so they
may be reinstalled in same place on crankshaft.)
Push connecting rod and piston assemblies up thru
cylinder deck. Disassemble connecting rods from
pistons by removing retaining rings and piston pins.
Remove oil and compressor rings from piston.
(Keep each connecting rod and piston assembly
together for proper reassembly.) Check all parts
and crankpin journals for wear (refer to Table 5 for
wear limits).
CONNECTING
RODS a CAPS
CRANKSHAFT
■? r
i »
CONN
ROD
CAPS
t »•
l' s
i *
I '
OIL DRAIN PLUG
(MAGNETIC)
BOTTOM COVER
PLATE
Fig. 26 Removing Connecting Rod and
Piston Assemblies
Crankshaft — Remove pump end bearing head and
rotor.^ If connecting rod and piston assemblies are
still in place, remove connecting rod caps and push
piston assembly up into cylinder for crankshaft
clearance. Pull crankshaft out thru pump end
opening. Inspect crankshaft journals for wear and
tolerances shown in Table 5. Check oil passages
and clean if clogged.
Pump End Main Bearing is a machined part of the
oil pump and bearing head casting. Disassemble
bearing head. If bearing is scored or worn, replace
the complete bearing head.
Crankcase and Motor End Main Bearings are not
field replaceable. If bearings are worn or damaged,
replace compressor.
COMPRESSOR RUNNING GEAR
REPLACEMENT
Crankshaft — Ensure compressor end bearing
washer is in place on dowel pin. Install crankshaft
thru pump end, carefully guiding it thru main
bearings. Replace rotor.
Connecting Rod and Piston Assembly (Fig. 12) —
Attach connecting rods to pistons with piston pins,
and lock in place with retaining rings. Place
retaining rings with the gap on the side. They
should be tight enough so they cannot be rotated
by finger pressure.
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