LOCK GP-CENTERSHIFT 1648462 - Caterpillar

Required Tools
The following tool is required to perform this procedure:
Table 1
Tools Needed
Part Number Part Name Quantity
8H-8581 Feeler Gauge 1 Valve Lash Check
Measure the valve lash between the rocker arm and the valve bridge. Perform checks and adjustments with the engine stopped. Ensure that the valves are seated.An adjustment is not necessary if the measurement of the valve lash is in the acceptable range. Adjust the valve lash while the engine is stopped. The range is specified in Table 2.
Table 2
CG137 Engines
Engine Crankshaft Position Inlet Valves Exhaust Valves
CG137-8 and CG137-12 Valve Lash Check (Stopped Engine) 0.38 0.10 mm (0.015 0.004 inch) 1.02 0.10 mm (0.040 0.004 inch)
CG137-8 TC Compression Stroke(1) 1-2-5-7 1-3-4-8
TC Exhaust Stroke(2) 3-4-6-8 2-5-6-7
Firing Order 1-8-4-3-6-5-7-2(3)
CG137-12 TC Compression Stroke(1) 1-3-4-6-7-12 1-4-5-8-9-12
TC Exhaust Stroke(2) 2-5-8-9-10-11 2-3-6-7-10-11
Firing Order 1-4-9-8-5-2-11-10-3-6-7-12(3)
(1) Engine pinned at the position for No. 1 cylinder
(2) Engine pinned at 360° from the TC compression stroke
(3) The No. 1 cylinder is at the front left side of the engine.If the measurement is not within this range, adjustment is necessary.Valve Bridge Adjustment
When the head is disassembled, mark the valve bridges for the respective cylinders. Adjustment of the bridge will be necessary after grinding the valves or other reconditioning of the cylinder head.The