F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
5 - M
AINTENANCE
PAGE 5-8
installation, cool the new bushing in a 95% alcohol solution, with dry ice solution.
Leave the bushing in the solution long enough to reach the solution tempera-
ture, about -110°F (-80°C).
CAUTION!: DO NOT TOUCH COLD SURFACES WITHOUT PROPER INSULATION TO
PREVENT INJURY. ALCOHOL IS FLAMMABLE AND SHOULD ONLY BE
USED IN OPEN AIR OR A WELL VENTILATED BUILDING. AVOID SPARKS
AND OPEN FLAME. AVOID ALCOHOL VAPORS WHICH MAY CAUSE
INJURY TO THE TISSUES OF THE NOSE AND EYES. AVOID EYE AND
SKIN CONTACT. USE NEOPRENE OR BUTYL GLOVES, MONO-GOGGLES
OR FACE-MASK AND IMPERMEABLE APRON. IT CONTAINS METHYL
ALCOHOL AND IS POISONOUS IF INGESTED. SEE MANUFACTURER'S
MATERIAL SAFETY DATA SHEETS FOR MORE INFORMATION. DO NOT
RETURN SOLUTION TO A CLOSED CONTAINER UNTIL IT HAS REACHED
ROOM TEMPERATURE OR THE CONTAINER MAY EXPLODE.
NOTE: ABSOLUTE CLEANLINESS IS REQUIRED OF BOTH THE BUSHING AND THE
CONNECTING ROD TO PREVENT DIRT FROM ACCUMULATING BETWEEN
THEM. ASSEMBLY MUST BE IMMEDIATE SO THAT THE BUSHING DOES NOT
WARM-UP AND STICK BEFORE IT IS IN PLACE. IF STICKING A NEW BUSH-
ING, REMOVE BY NOTCHING AS IN REMOVAL INSTRUCTIONS, AND START
OVER WITH ANOTHER NEW BUSHING. DO NOT SEAT A STUCK BUSHING
WITH A PRESS OR HAMMER.
4.
F
IGURE
5-6 R
OD
B
USHING
I
NSTALLATION
Bushing Oil
Hole
Bushing Exterior
Annular Groove
Bushing
Oil Passage
Connecting Rod
Position the connecting rod on the press
table so that the chamfered edge of the rod
bushing hole is on top. Install the bushing
quickly while it is very cold. Be sure to locate
the bushing oil hole at the connecting rod oil
passage before pressing it in. The bushing
has exterior and interior annular grooves in
line with the oil hole. Should the bushing shift
circumferentially during operation oil can still
travel to its inner surface and to the cross-
head pin. However, during installation of a
new bushing, no more than 1/3 of the oil pas-
sage hole in the rod should be covered by
the bushing.
Connecting Rod - Installation
1.
If installing a new replacement connecting rod, stamp throw number on the tops
of the connecting rod and bearing cap, (with bearing notches up), matching its
throw location, see Figure 5-7 on Page 5-9.
2.
Check new bearing shells to see they are free of handling damage, scratches,
burrs, and loose material at the tabs.
DO NOT RUB BEARING SURFACE
WITH FINGERNAIL.
Check the part number on each connecting rod when
ordering and installing bearings to be sure that the bearing part numbers being
installed are compatible with the connecting rod.
NOTE: DO MIX BEARING SHELL PART NUMBERS ON AN INDIVIDUAL CONNECTING
ROD. BOTH HALF SHELLS MUST HAVE THE SAME PART NUMBER.
3.
New bearing shells and crankshaft crank pin bearing surfaces must be abso-
