D6K Track-Type Tractor Hydraulic System Caterpillar

Illustration 1	g01674993

The 246-9876 Piston and Gear Pump Group is a tandem pump for the implements. The pump group is composed of 260-6781 Piston Pump and the 260-6782 Gear Pump Gp. The rotation of both pumps is clockwise.

(1) 260-6781 Piston Pump specifications

Maximum displacement ... 60 cc (3.66 in³)

High pressure cutoff ... 25000 ± 350 kPa (3626 ± 50.8 psi)

Margin pressure ... 1700 ± 100 kPa (246.6 ± 14.4 psi)

Standard flow at 95% efficiency ... 120 L/min (31.7 US gpm)

Rated pump speed ... 2000 rpm

(2) Torque for the plug ... 127 N·m (94 lb ft)

(3) Torque for the plug ... 190 N·m (140 lb ft)

(4) Torque for four bolts ... 165 N·m (122 lb ft)

(5) 260-6782 Gear Pump Gp specifications

Maximum displacement ... 25 cc (1.5 in³)

Maximum speed ... 3000 rpm

Maximum pressure ... 250 bar (3625.0000 psi)

(6) Torque for four bolts ... 140 ± 10 N·m (103 ± 7 lb ft)

(7) Torque for the plug ... 50 ± 10 N·m (37 ± 7 lb ft)