3044C Industrial Engine and Engines for Caterpillar Built Machines Rocker Shaft Caterpillar


Rocker Shaft
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Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     8T-5096     Dial Indicator Group     1    
B     -     V Block     2    



Illustration 1g00984738

(1) Rocker shaft

Diameter of the rocker shaft ... 18.980 to 19.000 mm (0.7472 to 0.7480 inch)

(2) Rocker arm

Inside diameter of the rocker arm bushings ... 19.010 to 19.030 mm (0.7484 to 0.7492 inch)
Clearance between the rocker arm bushing and the rocker shaft ... 0.010 to 0.050 mm (0.0004 to 0.0020 inch)
Maximum permissible clearance between the rocker arm bushing and the rocker shaft ... 0.070 mm (0.0028 inch)

(3) Spring

(4) Tighten the bolts evenly. Tighten the long bolt first. Tighten the bolts to the following torque. ... 10 to 20 N·m (7 to 15 lb ft)




Illustration 2g01256167

(5) Pushrods

Place the pushrod in Tooling (B). Use Tooling (A) in order to check all pushrods for runout. Replace the pushrod if the runout exceeds the following value. ... 0.30 mm (0.0118 inch)

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