1.6.1 Connecting Rod
DETROIT DIESEL 53
4. Place a short sleeve directly over the spray nozzle. Then press the nozzle out of the connecting rod..
5. Remove the tool.
6. Start the new spray nozzle, with the holes positioned as shown in Fig. 6, straight into the counterbore in the
connecting rod..
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 the counterbore..
8. Install new bushings in the connecting rod.
Install Bushings
1. Clamp the upper end of the connecting rod assembly in holder J 7632 so that the bore for the bushings aligns with
the hole in the base of the tool.(Fig. 4)..
2. Start a new bushing straight into the bore of the connecting rod, with the bushing joint at the top of the rod (Fig. 7)..
3. Insert installer J 4972-2 in the bushing, then insert handle J 1513-2 in the installer and drive the bushing in until the
flange of the installer bottoms on the.-connecting rod..
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
a. Clamp reaming fixture J 7608-4 in a bench vise.
C. Place the crankshaft end of the connecting rod on the arbor of the fixture (Fig. 8). Tighten the nuts on the 3/8"-
24 bolts (In-line
engines) to.40-45 lb-ft torque..
d. Slide the front guide bushing J 4971-6 (with the pin end facing out) in the fixture..
e. Install spacer J 7608-3 in the fixture.
f. Align the upper end of the connecting rod with the hole in the reaming fixture.
g. Install the rear guide bushing J 1686-5 on the reamer J 7608-21, then slide the reamer and bushing into
the fixture.
h. Turn the reamer in a clockwise direction only, when reaming or withdrawing the reamer. For best results, use
only moderate pressure on the reamer. i. Remove the reamer and the connecting rod from the fixture, blow out the chips
and measure the in- side diameter of the bushings. The inside diameter of the bushings must be 1.3760" to 1.3765".
This will provide a piston pin-to-bushing clearance of .0010"
Fig. 9 Installing Piston Pin Retainer
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