Hitachi ZAXIS 270-3 class User Manual

MAINTENANCE
7-84
17
Check Tightening Torque of Bolts and Nuts
--- every 250 hours (first time after 50 hours)
Check tightness after the first 50 hours then every 250
hours. Tighten to torque shown if any are loose. Bolts and
nuts should be replaced with those of the same or higher
grade.
For tightening nuts and bolts other than specified in
the table below, refer to the Tightening Torque Chart
at the end of this section.
IMPORTANT: Check and tighten bolts and nuts us-
ing a torque wrench.
ZX120-3 Class
No. Descriptions
Bolt Dia
Q’ty
Wrench
Size
Torque
mm mm N • m (kgf • m)
1 Engine cushion rubber mounting bolt and nut 16 4 24 240 (24)
2 Engine bracket mounting bolt (Pump side) 12 8 19 110 (11)
3 Hydraulic oil tank mounting bolt 16 4 24 270 (27)
4 Fuel tank mounting bolt 16 4 24 270 (27)
5
Radiator mounting bolt (Upper side) 10 4 17 50 (5)
Radiator mounting bolt (Lower side) 12 3 19 90 (9)
6 Pump transmission mounting bolt 10 8 17 65 (6.5)
7
Control valve mounting bolt 14 4 22 140 (14)
Control valve bracket mounting bolt 16 4 24 270 (27)
8 Swing device mounting bolt 20 10 30 510 (51)
9 Swing motor mounting bolt 10 7 8 65 (6.5)
10 ORS fittings for hydraulic hoses and piping
17 25 (2.5)
19 30 (3)
22 40 (4)
27 95 (9.5)
32 140 (14)
36 180 (18)
41 210 (21)
11 Hycolin tube mounting nut – – 17 35 (3.5)
12 Battery mounting nut 10 4 17 50 (5)
13
Cab mounting nut 16 4 24 210 (21)
Cab mounting anchor bolt 20 1 30 550 (55)
Cab cushion rubber mounting bolt 12 8 19 110 (11)
14 Cover mounting bolt
6 10 10 (1)
10 – 17 50 (5)
12 19 90 (9)
15
Flexible master coupling of piping
1/4-28UNF
– 11 6 (0.6)
T-bolt clamp of high pressure piping – 8 10 6 (0.6)
16 Swing bearing mounting bolt to
(Upperstructure) 18 30 27 400 (40)
(Undercarriage) 16 36 24 270 (27)
17
Travel device mounting bolt
ZX110-3, 130-3 16 28 24 320 (32)
ZX110M-3, 130LCN-3 16 32 24 320 (32)
Travel reduction device cover
mounting bolt
ZX110-3, 130-3 14 8 22 180 (18)
ZX110M-3, 130LCN-3 14 12 22 180 (18)
Sprocket mounting bolt
ZX110-3, 130-3 16 32 24 270 (27)
ZX110M-3, 130LCN-3 20 32 30 470 (47)
18 Upper roller mounting bolt
ZX110-3, 130-3 12 8 19 100 (10)
ZX110M-3, 130LCN-3 16 16 24 270 (27)
19 Lower roller mounting bolt
ZX110-3 16 48 24 310 (31)
ZX130-3, 130LCN-3 16 56 24 310 (31)
ZX110M-3 18 48 27 460 (46)
20 Track shoe mounting bolt
ZX110-3 16 328 24 420 (42)
ZX130-3, 130LCN-3 16 352 24 420 (42)
ZX110M-3 20 336 27 820 (82)
21 Track guard mounting bolt ZX110M-3 18 8 27 510 (51)

Hitachi ZAXIS 270-3 class Specifications

General

Brand	Hitachi
Model	ZAXIS 270-3 class
Category	Excavators
Language	English