320C and 322C Excavators Attachment Hydraulic System – Main Control Valve



Illustration 1 g00767069

(Section A-A) Boom regeneration valve

(Section B-B) Stick unloading valve and stick regeneration valve

(Section C-C) Line relief valve for the negative flow control in the right valve bank

(Section D-D) Stick (2)

(Section E-E) Boom (1)

(Section F-F) Bucket

(Section G-G) Attachment

(Section H-H) Travel (Right side)

(Section I-I) Straight Travel

(Section J-J) Travel (Left side)

(Section K-K) Swing

(Section L-L) Stick (1)

(Section M-M) Boom (2)

(Section N-N) Line relief valve for the negative flow control in the left valve bank

Use the following pressure settings for the relief valves:

Main relief valve pressure setting … 34300 ± 490 kPa (4975 ± 71 psi)
Line relief valve pressure setting for the boom, the stick, and the bucket … 36300 ± 490 kPa (5265 ± 71 psi)

(1) Torque for plug … 35 ± 3 N·m (26 ± 2 lb ft)

(2) Torque for two plugs … 15 ± 2 N·m (11 ± 1 lb ft)

Boom Regeneration Valve



Illustration 2 g00767253

SECTION A-A

(3) Torque for plug … 220 + 20 – 0 N·m (160 + 15 – 0 lb ft)

(4) 153-5293 Spring

Free length … 38.55 mm (1.518 inch)
Outside diameter … 13.0 mm (0.51 inch)

(5) Torque for plug … 285 ± 30 N·m (210 ± 22 lb ft)

(6) Torque for connector … 105 ± 10 N·m (77 ± 7 lb ft)

(7) 153-5288 Spring

Free length … 55.7 mm (2.19 inch)
Outside diameter … 24.0 mm (0.94 inch)

Stick Unloading Valve and Stick Regeneration Valve



Illustration 3 g00767267

SECTION B-B

(8) Torque for plug … 220 + 20 – 0 N·m (160 + 15 – 0 lb ft)

(9) 153-5293 Spring

Free length … 38.55 mm (1.518 inch)
Outside diameter … 13.0 mm (0.51 inch)

(10) 153-5288 Spring

Free length … 55.7 mm (2.19 inch)
Outside diameter … 24.0 mm (0.94 inch)

(11) Torque for plugs … 285 ± 30 N·m (210 ± 22 lb ft)

(12) Torque for connector … 105 ± 10 N·m (77 ± 7 lb ft)

(13) Torque for plug … 35 ± 3 N·m (26 ± 2 lb ft)

(14) 153-5311 Spring

Free length … 80.4 mm (3.17 inch)
Outside diameter … 26.0 mm (1.02 inch)

Negative Flow Control (Right side)



Illustration 4 g00767223

SECTION C-C

(15) 107-6370 Spring

Free length … 49.3 mm (1.94 inch)
Outside diameter … 15.5 mm (0.61 inch)

(16) Torque for valve … 145 ± 15 N·m (107 ± 11 lb ft)

(17) Torque for plug … 240 + 20 – 0 N·m (180 + 15 – 0 lb ft)

(18) 7I-1248 Spring

Free length … 28.0 mm (1.10 inch)
Outside diameter … 8.7 mm (0.34 inch)

Stick (2)



Illustration 5 g00767286

SECTION D-D

(19) Torque for bolts … 49 ± 5 N·m (36 ± 4 lb ft)

(20) Torque for plug … 240 + 20 – 0 N·m (180 + 15 – 0 lb ft)

(21) 7I-1248 Spring

Free length … 28.0 mm (1.10 inch)
Outside diameter … 8.7 mm (0.34 inch)

(22) Apply 155-0695 Thread Lock Compound to the threads of bolt.

Torque for bolt … 50.0 + 9.8 – 0.0 N·m (36.88 + 7.23 – 0.00 lb ft)

(23) 104-7294 Spring

Free length … 62.27 mm (2.452 inch)
Outside diameter … 36.0 mm (1.42 inch)

Boom (1)



Illustration 6 g00767300

SECTION E-E

(24) Torque for plug … 240 + 20 – 0 N·m (180 + 15 – 0 lb ft)

(25) 7I-1248 Spring

Free length … 28.0 mm (1.10 inch)
Outside diameter … 8.7 mm (0.34 inch)

(26) Torque for valves … 95 ± 14 N·m (70 ± 10 lb ft)

(27) Torque for nut … 19.6 ± 2.0 N·m (14.46 ± 1.47 lb ft)

(28) Torque for bolts … 49 ± 5 N·m (36 ± 4 lb ft)

(29) 104-7293 Spring

Free length … 59.68 mm (2.350 inch)
Outside diameter … 36.0 mm (1.42 inch)

(30) Apply 155-0695 Thread Lock Compound to the threads of bolt.

Torque for bolt … 50.0 + 9.8 – 0.0 N·m (36.88 + 7.23 – 0.00 lb ft)

Bucket



Illustration 7 g00767352

SECTION F-F

(31) Torque for nut … 19.6 ± 2.0 N·m (14.46 ± 1.47 lb ft)

(32) Torque for valves … 95 ± 14 N·m (70 ± 10 lb ft)

(33) Torque for plug … 240 + 20 – 0 N·m (180 + 15 – 0 lb ft)

(34) 7I-1248 Spring

Free length … 28.0 mm (1.10 inch)
Outside diameter … 8.7 mm (0.34 inch)

(35) Apply 155-0695 Thread Lock Compound to the threads of bolt.

Torque for bolt … 50.0 + 9.8 – 0.0 N·m (36.88 + 7.23 – 0.00 lb ft)

(36) Torque for bolts … 49 ± 5 N·m (36 ± 4 lb ft)

(37) 104-7293 Spring

Free length … 59.68 mm (2.350 inch)
Outside diameter … 36.0 mm (1.42 inch)

Attachment



Illustration 8 g00767360

SECTION G-G

(38) Torque for two plugs … 95 ± 14 N·m (70.1 ± 10.3 lb ft)

(39) Torque for plug … 240 + 20 – 0 N·m (180 + 15 – 0 lb ft)

(40) 7I-1248 Spring

Free length … 28.0 mm (1.10 inch)
Outside diameter … 8.7 mm (0.34 inch)

(41) Torque for bolts … 49 ± 5 N·m (36 ± 4 lb ft)

(42) Apply 155-0695 Thread Lock Compound to the threads of bolt.

Torque for bolt … 50.0 + 9.8 – 0.0 N·m (36.88 + 7.23 – 0.00 lb ft)

(43) 104-7293 Spring

Free length … 59.68 mm (2.350 inch)
Outside diameter … 36.0 mm (1.42 inch)

Travel (Right side)



Illustration 9 g00767367

SECTION H-H

(44) Torque for bolts … 49 ± 5 N·m (36 ± 4 lb ft)

(45) Apply 155-0695 Thread Lock Compound to the threads of bolt.

Torque for bolt … 50.0 + 9.8 – 0.0 N·m (36.88 + 7.23 – 0.00 lb ft)

(46) 104-7296 Spring

Free length … 60.03 mm (2.363 inch)
Outside diameter … 36.0 mm (1.42 inch)

Straight Travel



Illustration 10 g00767375

SECTION I-I

(47) 4T-3148 Spring

Free length … 34.8 mm (1.37 inch)
Outside diameter … 5.4 mm (0.21 inch)

(48) Torque for plugs … 240 + 20 – 0 N·m (180 + 15 – 0 lb ft)

(49) 6I-6795 Spring

Free length … 30.0 mm (1.181 inch)
Outside diameter … 12.0 mm (0.472 inch)

(50) 4I-3510 Spring

Free length … 35.6 mm (1.402 inch)
Outside diameter … 8.4 mm (0.331 inch)

(51) Torque for relief valve … 135 ± 10 N·m (100 ± 7 lb ft)

(52) Torque for holder … 75 ± 10 N·m (55 ± 7 lb ft)

(53) Torque for guide … 50 ± 7 N·m (37 ± 5 lb ft)

(54) 6E-5169 Spring

Free length … 72.2 mm (2.84 inch)
Outside diameter … 17.67 mm (0.696 inch)

(55) Torque for nut … 50 ± 10 N·m (37 ± 7 lb ft)

(56) Torque for bolts … 49 ± 5 N·m (36 ± 4 lb ft)

(57) 2S-2596 Spring

Free length … 33.3 mm (1.31 inch)
Outside diameter … 8.4 mm (0.33 inch)