3408 VEHICULAR ENGINE Caterpillar


Crankshaft

Usage:

(7N3410)

(1) Maximum length of pin out of crankshaft face ... .25 in.(6.4 mm)

(2) Thrust plates, at center main bearing.

(3) End play for the crankshaft (new) ... .006 to .020 in.(0.15 to .50 mm)

(4) Minimum torque for five plugs ... 17 lb. ft.(23 N·m)

"Stake" (make a mark with a punch) the crankshaft to hold the plug tight.

(5) Length of dowel out of the crankshaft ... .16 ± .02 in.(4.1 ± 0.5 mm)

(6) Maximum permissible temperature of the gear for installation on the crankshaft ... 450°F(232°C)

NOTE: Install gear with "V" mark to the outside.

(7) Rear wear sleeve and seal:

Remove wear sleeve with 5P7318 Distorter Group. See ( Installation of Wear Sleeve and Seal on 4N6635 Crankshaft Gear - 988B with 4N4302 Rear Gear Group) in Special Instruction Form SMHS7100.

NOTE: The Procedure is the same for the 768C and 769C as it is for the 988B. Different bolts must be used to fasten the 5P7301 Locator to the crankshaft. Use two 5P7310 Bolts.

(8) Make reference to CONNECTING ROD BEARINGS.

(9) Make reference to MAIN BEARINGS.

(10) Front wear sleeve and seal:

Remove wear sleeve with 5P7318 Distorter Group. See Special Instruction Form SMHS7100 for the correct tools and and procedure for installation of the front wear sleeve and seal.

(1W5010)

(1) Maximum length of pin out of crankshaft face ... .25 in.(6.4 mm)

(2) Thrust plates, at center main bearing.

(3) End play for the crankshaft (new) ... .005 to .020 in.(0.13 to 0.50 mm)

(4) Minimum torque for 5 plugs ... 17 lb. ft.(23 N·m)

"Stake"(make a mark with a punch) the crankshaft to hold the plug tight.

(5) Length of dowel out of the crankshaft ... .16 ±.02 in.(4.1 ± 0.5 mm)

(6) Rear seal group. Not to be used if seal and sleeve are separated. Install the seal group in the flywheel housing with the seal positioned as shown. See Special Instruction SMHS8301. Check installation as follows:

Distance from rear face of crankshaft to sleeve - Dimension A ... .06 ± .02 in.(1.5 ± 0.5 mm)

Distance from edge of sleeve to seal - Dimension B ... .24 ±.02 in.(6.1 ± 0.6 mm)

NOTE: Same procedure and dimensions apply to a crankshaft with rear gear group.

(7) Maximum permissible temperature of the gear for installation on the crankshaft ... 450°F(232°C)

NOTE: Install gear with "V" mark to the outside.

(8) Make reference to CONNECTING ROD BEARINGS.

(9) Make reference to MAIN BEARINGS.

(10) Front seal group. Not to be used if seal and sleeve are separated. Install the seal group in the front accessory drive housing with the seal positioned as shown. See Special Instruction SMHS8301. Check installation as follows:

Sleeve to be flush with front face of crankshaft within ... .005 in.(0.13 mm)

Distance from edge of sleeve to seal - Dimension C ... .19 ± .02 in.(4.9 ±0.6 mm)

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