Hitachi ZAXIS 850LC-3 User Manual

MAINTENANCE
7-109
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 using a
torque wrench.
ZX450LC-3
No Descriptions
Bolt Dia
Q’ty
Wrench
Size (mm)
LOCTITE
Torque
mm N•m (kgf•m) (lbf•ft)
1
Engine cushion
rubber mount-
ing bolt
Fan side
27 2 41
*
1050 (105) (770)
Pump Side
Engine - Cushion
rubber
22 2 32 750 (75) (550)
Cushion rubber
- Machine
18 4 27 400 (40) (295)
2
Engine bracket mounting bolt
14 8 22
*
210 (21) (155)
3
Radiator mounting bolt
20 4 30
*
550 (55) (405)
4
Oil cooler mounting bolt
5
Hydraulic oil tank mounting bolt
16 8 24
*
210 (21) (155)
6
Fuel tank mounting bolt
16 8 24
*
210 (21) (155)
7
ORS fittings for hydraulic hoses and piping
3
1 – — –12UNF
16
7
1 – — –12UNF
16
36
41
180
210
(18)
(21)
(135)
(155)
8
Pump Transmission mounting bolt
(not required)
9
Pump device mounting bolt
12 10 19
*
90 (9) (66)
10
Fan pump mounting bolt
16 4
H14
230 (23) (170)
11
Fan motor mounting bolt
12 2 19 110 (11) (80)
12
Control valve mounting bolt
20 4 30
*
400 (40) (295)
13
Control valve bracket mounting bolt
20 6 30
*
400 (40) (295)
14
Swing device mounting bolt
22 26 32 750 (75) (550)
15
Swing motor mounting bolt
18 24
H14
300 (30) (220)
16
Battery mounting nut
12 2 19 35 (3.5) (26)
17
Cab mounting nut
16 6 24 210 (21) (155)
18
Cab anchor mounting bolt
22 2 32 550 (55) (405)
19
Swing bearing mounting bolt to upper structure
Swing bearing mounting bolt to undercarriage
30
27
36
36
46
41
1950
1400
(195)
(140)
(1440)
(1030)
20
Travel device mounting bolt
22 40 32 750 (75) (550)
Travel motor mounting bolt
18 8 27 300 (30) (220)
Sprocket mounting bolt
22 48 32 750 (75) (550)
21
Upper roller mounting bolt
18 24 27 400 (41) (295)
16

Hitachi ZAXIS 850LC-3 Specifications

General

Brand	Hitachi
Model	ZAXIS 850LC-3
Category	Excavators
Language	English