RING-BACKUP 3674978 - Caterpillar

Illustration 1 g01431054
Displacement per revolution ... 140 cc (8.5 in3)Rotation ... CounterclockwiseCutoff pressure ... 24000 350 kPa (3480 50 psi)Margin pressure ... 2100 100 kPa (305 15 psi) (1) Torque for the four bolts ... 9 N m (80 lb in) (2) Torque for the O-ring plug ... 25 N m (18 lb ft) (3) Torque for the O-ring plug ... 147 N m (110 lb ft)
Illustration 2 g01444115
Section A-ALow pressure standby ... 2300 kPa (335 psi)Margin pressure at 1500 rpm ... 2100 100 kPa (305 15 psi)Discharge pressure ... 2068 kPa (300 psi)Displacement per revolution ... 70 cc (4.3 in3)
Illustration 3 g01444530
Section B-BHigh pressure stall with the pump at rated speed ... 24100 350 kPa (3495 50 psi) (4) 194-3288 Spring Free length ... 41.9 mm (1.65 inch) Outside diameter ... 12.6 mm (0.50 inch) (5) 194-3289 Spring Free length ... 39.5 mm (1.56 inch) Outside diameter ... 6.4 mm (0.25 inch)
Illustration 4 g01431055
Note: Apply 4C-4030 Thread Lock Compound to the threads of piston guide (6) . (6) Torque for the piston guide ... 200 N m (150 lb ft) (7) Torque for the two plug assemblies ... 40 N m (30 lb ft) (8) Torque for the four bolts ... 430 N m (320 lb ft)Note: Grind the spacer (9) to required thickness with the faces parallel within 0.05 mm (0.002 inch). (9) 247-3761 Spacer Quantity ... 1 Thickness of the spacer ... 3 mm (0.1 inch)Note: Apply 4C-4030 Thread Lock Compound to the threads of plunger guide (10) . (10) Torque for the plunger guide ... 180 N m (135 lb ft) (11) The break off plug is in the head.