3054B Industrial Engine Caterpillar

Illustration 1	g00295480

(1) Spring

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

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

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

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

The relief valve for the engine oil pressure should open at the following pressure: ... 340 to 395 kPa (49 to 57 psi)

If the engine is equipped with a balancer unit, the relief valve for the engine oil pressure should open at the following pressure: ... 523 kPa (76 psi)

(2) Relief valve plunger

Outside diameter of the relief valve plunger ... 18.16 to 18.18 mm (0.715 to 0.716 inch)

Outside diameter of the relief valve plunger on engines that are equipped with a balancer unit ... 15.95 to 15.98 mm (0.628 to 0.629 inch)

Clearance of the relief valve plunger in the bore of the relief valve housing ... 0.06 to 0.11 mm (0.002 to 0.004 inch)

Clearance of the relief valve plunger in the bore of the relief valve housing on engines that are equipped with a balancer unit ... 0.02 to 0.08 mm (0.0008 to 0.0031 inch)

(3) Relief valve housing

Diameter of the bore in the relief valve housing ... 18.24 to 18.27 mm (0.718 to 0.719 inch)

Diameter of the bore in the relief valve housing for engines that are equipped with a balancer unit ... 16.00 to 16.03 mm (0.630 to 0.631 inch)

(4) Bolt

Tighten the bolt to the following torque: ... 44 N·m (33 lb ft)