ADAPTER-FAN 8N1789 - Caterpillar

Illustration 1 g00527019
(1) Thickness of new thrust washer ... 11.80 0.05 mm (0.465 0.002 inch)Thickness of groove between camshaft and the thrust washer ... 12.00 0.05 mm (0.472 0.002 inch) (2) Diameter of camshaft journal ... 173.80 0.03 mm (6.843 0.001 inch)Bore in camshaft bearings after installation ... 174.000 0.050 mm (6.8504 0.0020 inch)
Illustration 2 g00527253
Location Of Dowels On The Camshaft Bearing Journal
Illustration 3 g00574964
Location Of Dowels On The Camshaft Bearing Journal
Correct cam segment relationship (timing) must be observed at assembly. If the cam segments are out of time, serious engine damage will occur.
Note: The position of the single dowel in relation to the variable dowel determines the letter designation of the cam journals. The single dowel is located on the same end as the locating groove. The variable dowel is located on the end opposite the locating groove. (3) Location of the single dowel in the face of the camshaft journalDistance from the top of the dowel to the camshaft bearing journal ... 15.0 0.5 mm (0.59 0.02 inch) (4) Locating groove
Illustration 4 g00575316
Letter Designation Of 3612 Camshaft Journals (5) The 3612 camshaft must be assembled in an assembly fixture or the camshaft must be assembled in the cylinder block.The rolling torque must be a maximum of the following value. ... 22 N m (16 lb ft)
Illustration 5 g00595621
Letter Designation Of 3616 Camshaft Journals (6) The 3616 camshaft must be assembled in an assembly fixture or the camshaft must be assembled in the cylinder block.The rolling torque must be a maximum of the following value. ... 28 N m (21 lb ft) (7) Camshaft bearing journal Install the camshaft bearing journals with the grooved end toward the front of the engine. (8) Camshaft segmentInstall the camshaft segments with the grooved flange toward the front of the engine for SAE standard rotation engines. Install the camshaft segments with the grooved flange toward the rear of the engine for SAE opposite rotation engines. (9) Tighten the bolts for the camshaft segment (earlier camshafts with 1/2" bolts) to the following torque. ... 135 15 N m (100 11 lb ft) (10) Rear of engine
Illustration 6 g00527486
(11) Specified camshaft lobe liftTo find the specified camshaft lobe lift, use the procedure that follows:
Measure the total height of the camshaft (12) .
Measure base circle (13) .
Subtract base circle (13) from the total height of camshaft (12) . The difference is the specified camshaft lobe lift (11) .
Specified camshaft lobe lift (11) for the camshaft is the following value:Exhaust lobe ... 19.500 mm (0.7677 inch)Inlet lobe ... 19.500 mm (0.7677 inch)Fuel injection pump camshaft lobe ... 21.473 mm (0.8454 inch)