3003, 3013, 3014 and 3024 Engines for Caterpillar Built Machines Caterpillar

3003 Engine

Note: Before assembly, lubricate the components with clean engine lubricating oil.

Illustration 1	g00694054

Illustration 2	g00694075

(1) Mounting stud

(2) Valve mechanism

(3) Nut

Tighten the nuts that hold the valve mechanism to the following torque. ... 23 N·m (17 lb ft)

Note: The nut tightening sequence moves from the center of the rocker shaft outward.

(4) Valve cap

(5) Nut

Tighten the nut on the end of the rocker shaft to the following torque. ... 6 N·m (53 lb in)

Illustration 3	g00694122

(6) Rocker arm

(A) Standard clearance ... 0.032 to 0.068 mm (0.0013 to 0.0027 inch) (A) Service limit ... 0.2 mm (0.0079 inch)

(7) Adjustment screw

Note: When the adjustment screw is installed, ensure that the bottom of the screw seats fully in the concave end of the pushrod.

(8) Nut for adjustment screw

(9) Bracket for the rocker arm

(10) Pin for bracket (9)

Note: A pin (10) is installed in the bracket for No. 1 cylinder. When the rocker arm assembly is disassembled, the pin must be removed.

(11) Washer

(12) Spring

(13) Washer

(14) Rocker shaft

Diameter ... 11.65 to 11.67 mm (0.4587 to 0.4594 inch)

Service limit ... 11.57 mm (0.4555 inch)

3013, 3014, and 3024 Engines

Note: Before assembly, lubricate the components with clean engine lubricating oil.

Illustration 4	g00456374
Typical example Four cylinder engine is shown.

(1) Nut for adjustment screw

(2) Adjustment screw

Note: When the adjustment screw is installed, ensure that the bottom of the screw seats fully in the concave end of the pushrod.

(3) Spring

(4) Washer

Illustration 5	g00456375

(5) Rocker arm

(A) Standard clearance for 3013 engines ... 0.032 to 0.068 mm (0.0013 to 0.0027 inch) (A) Service limit for 3013 engines ... 0.2 mm (0.0079 inch)

(A) Standard clearance for 3014 and 3024 engines ... 0.030 to 0.093 mm (0.0012 to 0.0037 inch) (A) Service limit for 3014 and 3024 engines ... 0.2 mm (0.0079 inch)

(6) Rocker shaft

Diameter for 3013 engines ... 11.65 to 11.67 mm (0.4587 to 0.4594 inch)

Service limit for the 3013 engines ... 11.57 mm (0.4555 inch)

Diameter for 3014 and 3024 engines ... 14.95 to 14.97 mm (0.5886 to 0.5894 inch)

Service limit for 3014 and 3024 engines ... 14.87 mm (0.5854 inch)

(7) O-ring

(8) Nut

Tighten the nuts that hold the valve mechanism on the 3013 engine to the following torque. ... 23 N·m (17 lb ft)

Tighten the nuts that hold the valve mechanism on the 3014 and 3024 engines to the following torque. ... 33 N·m (24 lb ft)

Note: The nut tightening sequence moves from the center of the rocker shaft outward.

(9) Bracket

(10) Bolt

Tighten the bolts that hold the bracket on the 3013 engine to the following torque. ... 23 N·m (17 lb ft)

Tighten the bolts that hold the bracket on the 3014 and 3024 engines to the following torque. ... 33 N·m (24 lb ft)

(11) Screw that secures the rocker arm shaft

(12) Pushrod

(13) Stud

(14) Gasket

(15) Lifter