GASKET 7W9856 - Caterpillar

Timing Check
Table 1
Tools Needed Quantity
9S-9082 Engine Turning Tool 1
Illustration 1 g00284801
Location of timing pins (typical example)
(1) Timing hole
(2) Timing pin
Remove rear camshaft covers from both sides of the engine.
Refer to Testing and Adjusting, "Finding the Top Center Position for the No. 1 Piston". Note: When the timing bolt is installed in the flywheel, it is not necessary to remove the No. 1 valve cover in order to find the compression stroke. Both rear camshaft covers must be removed in order to check the timing.
When the timing bolt is installed in the flywheel, look at the rear end of the camshaft. If the timing ring is visible, then the No. 1 piston is on the compression stroke. If the timing ring is not visible, feel the back of the camshaft for the groove. If the groove is at the back of the camshaft, the flywheel must be turned by 360 degrees in order to put the No. 1 piston on the compression stroke.
Illustration 2 g00284802
Installation of timing pins (typical example)
(2) Timing pin
(3) RH Camshaft
When the timing bolt is installed in the flywheel and the No. 1 piston is on the compression stroke, remove timing pins (2) from the storage positions.
Install timing pins (2) through timing holes (1) in the engine block. Install timing pins (2) into the groove in camshaft (3) on each side of the engine. In order to time the engine correctly, the timing pins must fit into the groove of each camshaft. If the timing pins do not engage in the grooves of both camshafts, the engine is not in time, and one or both camshafts must be adjusted.
Proceed to the "Timing Adjustment" procedure.
If a camshaft is out of time more than 18 degrees (approximately 1/2 the diameter of timing pin out of groove), the valves can make contact with the pistons. This will cause damage that will make engine repair necessary.
Timing Adjustment
Table 2
Tools Needed Quantity
9S-9082 Engine Turning Tool 1
1P-0820 Hydraulic Puller 1
8B-7548 Push-Puller Tool Group 1
8B-7559 Adapter 2
5H-1504 Hard Washer 3
9U-6600 Hand Hydraulic Pump 1 Note: Before any timing adjustments are made, make sure that adjustments are necessary. Refer to "Timing Check".After the Timing Check procedure is complete, the timing bolt will be engaged in the flywheel. The No. 1 piston will be at the top center (TC) position.
Illustration 3 g00662258
Rocker arm shaft assembly
(1) Bolt
(2) Rocker Shaft
Remove all valve covers on the side of the engine with the camshaft that needs adjustment. Disconnect the ignition wiring from the ignition transformer and remove the ignition transformer. Loosen bolts (1) that hold rocker shaft (2) to the valve cover bases until all rocker arms are free from the valves. Note: The above procedure must be done before the camshaft drive gear is pulled off the camshaft taper.
Illustration 4 g00662269
Left rear
(3) Cover
(4) Speed/Timing sensor
Remove camshaft gear cover (3) from the rear of the engine. If the left rear camshaft gear must be removed, remove speed/timing sensor (4).
Illustration 5 g00662337
Rear gear group
(5) Gear (left camshaft drive)
(6) Idler gear
(7) Speed/Timing ring
(8) Gear (right camshaft drive)
(9)