Paragraphs 45-49
CASE/iNTERNATiONAL
Idler to ir\jection pump drive gear:
New gears 0.002-0.012 in.
(0.051-0.305 mm)
Used gears (max.) 0.024 in.
I (0.609 mm)
45.
INJECTION PUMP DRIVE GEAR. Ib remove
the iixjection pump drive gear, first remove timing
gear cover as outlined in paragraph
41.
Remove drive
shaft nut and the three hub cap screws. Attach a
puller to threaded holes in gear and pull gear and
drive hub from shaft.
When reassembling, make certain all timing marks
are aligned as shown in
Fig.
52. The pump drive gear,
which is used on all engines is equipped with sever-
al timing marks. Use dot next to number 3 for D-155
and D-179 engines and dot next to number 4 for D-
206,
D-239 and D-268 engines. Refer to paragraph 61
and retime iryection pump. Tighten drive shaft nut
to a torque of 44-50 ft.-lbs. (60-70 N-m) and the three
hub cap screws to a torque of 19-21 ft.-lbs. (25-28
N-m).
CAMSHAFT AND BEARiNGS
Aii Modeis
46.
CAMSHAFT. Ib remove the camshaft, first re-
move the timing gear cover as outlined in paragraph
41.
Then, remove rocker arm cover, rocker arms and
shaft assembly and push
rods.
Unbolt and remove en-
gine side cover
Working through openings in camshaft gear, re-
move camshaft thrust plate retaining cap screws.
Carefully withdraw camshaft and remove valve tap-
pets (cam followers) as camshaft is being removed.
Press camshaft from camshaft gear, then remove
camshaft thrust plate and measure the thickness. If
thrust plate thickness is less than 0.274-0.276 inch
(6.96-7.01 mm), renew thrust plate. Check diameter
of camshaft journals which should be 2.2823-2.2835
inches (57.97-58.00 mm). If less than specifications,
renew camshaft.
Refer to paragraph 43 and reinstall camshaft gear,
camshaft thrust plate and camshaft.
47.
CAMSHAFT BEARINGS. Ib remove camshaft
bearings, first remove engine as outlined in paragraph
34 and camshaft as in paragraph 46. Unbolt and re-
move clutch, flywheel and engine rear end plate. Re-
move expansion plug behind camshaft rear bearing
and remove the bearings.
NOTE:
Camshaft bearings are furnished semi-
finished for service and must be align reamed after
instaliation to an inside diameter of 2.2844-2.2856
inches (58.024-58.054 mm).
Install new bearings so that oil holes in bearing are
in register with oil holes in crankcase. Normal oper-
ating clearance of camshaft journals in bearings is
0.0009-0.0033 inches (0.023-0.084 mm). Maximum al-
lowable clearance is 0.0045 inch (0.115 mm).
When installing expansion plug at rear camshaft
bearing, apply a light coat of sealing compound to
edge of plug and bore.
ROD AND PiSTON UNiTS
Aii Modeis
48.
Connecting rod and piston assemblies can be
removed from above after removing the cylinder
head, oil pan, oil pump pressure and suction pipes
and engine balancer on models so equipped.
Cylinder numbers are stamped on the connecting
rod and cap. Stamp any new or unmarked rod and
cap assemblies with correct cylinder numbers. Num-
bers on rod and cap must be in register and face to-
ward camshaft side of engine. The arrow or FRONT
marking stamped on tops of pistons must be toward
front of engine.
Tighten the connecting rod nuts to a torque of 18.5
ft.-lbs.
(25 N-m), then tighten nuts an additional 120
degrees (two flats on nut).
PiSTONS, SLEEVES AND RiNGS
Aii Modeis
49.
Pistons are not available as individual service
parts,
but only as matched units with wet type
sleeves. New pistons have a diametral clearance in
new sleeves of 0.0035-0.005 inch (0.09-0.13 mm) when
measured between piston skirt and sleeve at 90 de-
grees to piston pin.
The wet type cylinder sleeves should be renewed
when out-of-round or taper exceeds 0.006 inch (0.152
mm).
Inside diameter of new sleeve is 3.875-3.8759
inches (98.425-98.448 mm) on
D-155,
D-179, D-206 and
D-239 engines or 3.937-3.9379 inches (100.0-100.023
mm) on D-268 engines. Cylinder sleeves are removed,
using correct adapter plate and sleeve removing tool.
Sleeves are plateau honed and should never be
deglazed by honing on rering jobs. Remove oil and
varnish glaze with a 50/50 mixture of hot water and
liquid detergent.
Before installing new sleeves, thoroughly clean
counterbore at top and seal ring groove at bottom.
All sleeves should enter crankcase bores full depth
and should be free to rotate by hand when tried in
bores without seal rings. After making a trial instal-
lation without seal rings, remove sleeves and install
new seal rings dry into grooves in crankcase.
36
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