1.6.1 Connecting Rod
DETROIT DIESEL 53
4. Place a short sleeve directly over the spray nozzle.
a. Clamp reaming fixture J 7608-4 in a bench vise.
Then press the nozzle out of the connecting rod.
5. Remove the tool.
6. Start the new spray nozzle. with the holes positioned
c. Place the crankshaft end of the connecting rod on
as shown in Fig. 6. straight into the counterbore in the
the arbor of the fixture (Fig. 8). Tighten the nuts on
connecting rod.
the 3/8"-24 bolts (In-line
engines) to
40-45 lb-ft torque.
7. Support the connecting rod in the arbor press, place
a short 3/8" I.D. sleeve on top of the nozzle and press
the nozzle into the connecting rod until it bottoms in
d. Slide the front guide bushing J 4971-6 (with the
the counterbore.
pin end facing out) in the fixture.
8. Install new bushings in the connecting rod.
e. lnstall spacer J 7608-3 in the fixture.
f. Align the upper end of the connecting rod with the
lnstall Bushings
hole in the reaming fixture.
g. Install the rear guide bushing J 1686-5 on the reamer
1. Clamp the upper end of the connecting rod
J 7608-21, then slide the reamer and bushing into
assembly in holder J 7632 so that the bore for the
the fixture.
bushings aligns with the hole in the base of the tool
(Fig. 4).
h. Turn the reamer in a clockwise direction only,
when reaming or withdrawing the reamer. For best
2. Start a new bushing straight into the bore of the
results, use only moderate pressure on the reamer.
connecting rod, with the bushing Joint at the top of the
rod (Fig. 7).
i. Remove the reamer and the connecting rod from
3. Insert installer J 4972-2 in the bushing, then insert
the fixture, blow out the chips and measure the in-
handle J 1513-2 in the installer and drive the bushing
side diameter of the bushings. The inside diameter
in until the flange of the installer bottoms on the
of the bushings must be 1.3760" to 1.3765". This wilt
connecting rod.
provide a piston pin-to-bushing clearance of .0010"
4. Turn the connecting rod over in the holder and
install the second bushing in the same manner.
5. The bushings must withstand an end load of 2000
pounds without moving after installation
6. Ream the bushings to size as follows:
Fig. 8 - Reaming Bushings
Fig. 9 - Installing Piston Pin Retainer
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