3054 Engine Caterpillar

Illustration 1	g00295480

The relief valve for the engine oil pressure should open at the following pressure setting:

Engines that are not equipped with piston cooling jets ... 340 to 395 kPa (49 to 57 psi)

Engines that are equipped with piston cooling jets ... 415 to 470 kPa (60 to 68 psi)

Engines that are equipped with counter balancer ... 523 kPa (76 psi)

(1) Spring

Length under test force ... 59.8 mm (2.35 inch)

Length under test force for engines that are equipped with counter balancer ... 42.7 mm (1.681 inch)

Test force ... 15.9 to 23.1 N (3.6 to 5.2 lb)

Test force with engines that are equipped with counter balancer ... 34 to 38 N (7.6 to 8.5 lb)

(2) Outside diameter of plunger ... 18.16 to 18.18 mm (.715 to .716 inch)

Outside diameter of plunger with engines that are equipped with counter balancer ... 15.95 to 15.98 mm (.628 to .629 inch)

Clearance of plunger in bore ... 0.06 to 0.11 mm (.002 to .004 inch)

Clearance of plunger in bore with engines that are equipped with counter balancer ... 0.02 to 0.08 mm (.0008 to .0031 inch)

(3) Diameter of the bore in the valve housing ... 18.24 to 18.27 mm (.718 to .719 inch)

Diameter of the bore in the valve housing with engines that are equipped with counter balancer ... 16.00 to 16.03 mm (.630 to .631 inch)

(4) Tighten the bolt to the following torque: ... 44 ± 5 N·m (32 ± 4 lb ft)