Ford F-750 Shop Manual

22
Chapter I-General Engine Repair
7. FLYWHEEL, CRANKSHAIT, MAIN BEARINGS, AND CONNECTING
ROD BEARINGS
Pr oced ur es for the inspection a nd repair of these
components are co nta in ed in the following paragraphs.
a. Flywheel.
Th e flywheel a nd ring gear are a shrink fit and are
repla ceab le as separa te parts.
(1) INSPECT IO N. Che ck the flywheel face run-
out with a dial indicator (fig. 30). If the runout ex-
ceed. O.OOS - inch , r emove the flywheel, and check the
runout of the crankshaft mounting flange. It will be
nec essary to r emove the cra nkh a ft if the flange requires
machining.
In spect the ring gear for worn, c hipped, or crac k ed
teeth . Ch eck the ring gear run out as indicated in fig. 3 1.
(2) REPAIRS. If the flywheel runout exceeds
O.OOS-in ch a nd the flange is not at fault , the flywh ee l
should be replaced or m ac hined. Machine the friction
surface
of the flywheel if it is scored. If it is necessary
to remove mor e than O. 04S-inch of s to ck from the
original thickness, the flywh ee l s hould be replaced.
If the ring gear t eet h are chipped, broken, cracked,
or worn, or if the runout exceeds O.OIO-inch, replace
the ring gear as follows :
Heat th e defective ring gear with a blow torch on the
engine side of the gear, then knock it off the flywhee l.
CAUTION: Do not hit the flywh ee l when re mo ving
the ring gear.
Fig. 30-Flywheel Runoul Check
H eat the new ring gear eve nly until th e gear ex-
pands eno ugh to s lip onto the flywheel, then position
th e gear on the flywhee l. M ake su re th e gear is seate d
properly against the shoulder.
CAUTION: Do n ot heat allY portion of the gear to
a tem , perature hi gher than 500
0
F. If I. his lim .il. is ex -
ceeded, the temper will be rem . oved front the rin g gear
teet./". JPhen th e n ew ring gear is in stalled perform ,
a
rUllout check on the ring gear and flywheel.
h. Crankshaft.
(1) CLEANING AND INSPECTION. Before the crank -
shaft is removed, c he ck the end play for con form a nce to
specifications using ind icator in the following manner:
Pu sh the crankshaft tow ard the r ear of the engine.
Pla ce a dial indicator against th e rear side of the
cra nk sha ft flange. Set the dial on zero then pu sh the
cra nk sh aft forward. Comp are the r eadi ng on the dial
indicator with specificatio n s.
Aft er removing the crankshaft, wash it in a solvent,
and blowout th e oil pa ssages with co mpressed air .
Examin e the shaft with a magnifying glass for cracks or
ot h er signs of failure.
M
eas ure each crankpin and journal diameter for con-
forman ce to specifications . Check th e sha ft for proper
taper and out-of-roundness at several places around
the circumfe ren ce.
,
•
6084
Fig. 3J-Ring Gear Runoul Check

Ford F-750 Specifications

General

Brand	Ford
Model	F-750
Category	Automobile
Language	English