CARBURETOR 5B7945 - Caterpillar

Illustration 1 g02732098
C2.4
Note: Apply engine oil to the threads and seats of the cylinder head bolts before assembly.Gradually tighten the bolts for the cylinder head, in the proper sequence from 1 to 18, to the following torque ... 95.65 2.45 N m (70.55 1.75 lb ft)
Illustration 2 g02807179Cylinder head flatness allowable limit ... 0.05 mm (0.002 inch)Top Clearance
Illustration 3 g02839483
(1) Piston
(2) Fuse
Remove the cylinder head.
Move up the piston and attach a strip of fuse on the piston head at three positions with grease.
Lower the piston and install the cylinder head.Note: Use a new cylinder head gasket and tighten the bolts to the proper torque.
Turn the flywheel until the piston goes more than the top dead center.
Remove the cylinder head and measure the thickness of the fuses.
If the measurement is out of the factory specifications, examine the oil clearances between the crankpin and bearing. Also examine that between the piston pin and bushing.Note: After you examine the top clearance, make sure that you assemble the cylinder head with a new cylinder head gasket.
Table 1
Top clearance of cylinder head 0.60 to 0.70 mm
0.024 to 0.027 in. Valve Springs
Table 2
Specifications for Valve Springs
Free Length (New) 41.7 to 42.2 mm
1.65 to 1.66 inch
Allowable Limit 41.2 mm
1.62 inch
Load Setting/Length Setting (New) 118N at 35.0 mm
26.5 lbf at 1.38 inch
Allowable Limit 100N at 35.0 mm
22.5 lbf at 1.38 inch
Tilt 1.0 mm
0.039 inch