320D3 and 323D3 Excavators Machine System Specifications Caterpillar


Main Hydraulic Pump

Usage:

320D3 ESX


Illustration 1g06321415
Typical example

Table 1
Item  Qty  Part  Specification Description 
8T-1757 Nut  Torque to 130 ± 5 N·m (96 ± 4 lb ft)
9S-4183 Plug  Torque to 190 ± 5 N·m (140 ± 4 lb ft)
551-6810 Piston  Torque to 240 ± 5 N·m (177 ± 4 lb ft)
551-6809 Pin As  Torque to 240 ± 5 N·m (177 ± 4 lb ft)
8T-4131 Nut  Torque to 240 ± 5 N·m (177 ± 4 lb ft)
8T-1158 Bolt  Torque to 29 ± 5 N·m (257 ± 44 lb in)
Tighten the bolt to 20 ± 2 N·m (177 ± 18 lb in)
18    Torque to 18 ± 5 N·m (159 ± 44 lb in)
18  551-6801 Cylinder Spring  Free length is 41.1 mm (1.62 inch)
10  505-1681 Bolt  Torque to 430 ± 5 N·m (317 ± 4 lb ft)
11  Tighten the bolt to 20 ± 2 N·m (177 ± 18 lb in)
12  Tighten the bolt to 12 ± 2 N·m (106 ± 18 lb in)
13  Tighten the bolt to 435 N·m (321 lb ft)


Illustration 2g06321417
551-6789 Gear Pump Gp

Table 2
Item  Qty  Part  Specification Description 
14  Tighten the fitting of the suction port to 74 ± 5 N·m (55 ± 4 lb ft)
15  387-4672 Bolt  Torque to 20 ± 2 N·m (177 ± 18 lb in)
16  6I-0455 Bolt  Torque to 20 ± 2 N·m (177 ± 18 lb in)
17  Tighten the fitting of the delivery port to 53 ± 5 N·m (39 ± 4 lb ft)
18  110-5525 Plug  Torque to 16 ± 2 N·m (142 ± 18 lb in)
19  5I-8775 Adapter  Torque to 53 ± 5 N·m (39 ± 4 lb ft)
20  197-0165 Bolt  Torque to 20 ± 2 N·m (177 ± 18 lb in)
21  551-6807 Spring  Free length is 30 mm (1.2 inch)


Illustration 3g06321425
551-6795 Solenoid Valve Gp

Table 3
Item  Qty  Part  Specification Description 
22  110-5525 Plug  Torque to 59 ± 5 N·m (44 ± 4 lb ft)
23  552-7943 Solenoid Valve  Torque to 44 ± 5 N·m (33 ± 4 lb ft)
24  7I-8084 Plug  Torque to 8.8 ± 2.0 N·m (77.9 ± 18 lb in)
25  8T-2396 Bolt  Torque to 12 ± 2 N·m (106 ± 18 lb in)

Caterpillar Information System:

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