C4.4 Engines for Caterpillar Built Machines Caterpillar

Installed in the Oil Pump

Illustration 1	g00919893
Typical engine oil pump

Illustration 2	g00921377
Relief valve and spring

(1) Tighten the plug for the relief valve to the following torque. ... 35 N·m (26 lb ft)

(2) Plunger

Diameter of the plunger ... 19.139 to 19.225 mm (0.75350 to 0.75689 inch)

Clearance of plunger in bore ... 0.06 to 0.09 mm (0.00236 to 0.00354 inch)

(3) Spring

Length of the spring ... 80.94 mm (3.1866 inch)

Installed in the Balancer

Illustration 3	g00919890
Plug

Illustration 4	g00921379
The relief valve for the balancer

(1) Tighten the plug for the relief valve to the following torque. ... 35 N·m (26 lb ft)

(2) Plunger

Diameter of the plunger ... 14.46 to 14.48 mm (0.5692 to 0.5700 inch)

Clearance of the plunger in the bore ... 0.04 to 0.08 mm (0.0015 to 0.0031 inch)

(3) Spring

Length of the spring ... 67 mm (2.6378 inch)