Check Tightening Torque Of Bolts And Nuts - Hitachi ZAXIS 450LC-3 Operator's Manual

16

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
Fan side
Engine cushion
1
rubber mount-
Pump Side
ing bolt
2
Engine bracket mounting bolt
3
Radiator mounting bolt
4
Oil cooler mounting bolt
5
Hydraulic oil tank mounting bolt
6
Fuel tank mounting bolt
7
ORS fittings for hydraulic hoses and piping
8
Pump Transmission mounting bolt
9
Pump device mounting bolt
10 Fan pump mounting bolt
11 Fan motor mounting bolt
12 Control valve mounting bolt
13 Control valve bracket mounting bolt
14 Swing device mounting bolt
15 Swing motor mounting bolt
16 Battery mounting nut
17 Cab mounting nut
18 Cab anchor mounting bolt
Swing bearing mounting bolt to upper structure
19
Swing bearing mounting bolt to undercarriage
Travel device mounting bolt
20
Travel motor mounting bolt
Sprocket mounting bolt
21 Upper roller mounting bolt
Descriptions
Engine - Cushion
rubber
Cushion rubber
- Machine
MAINTENANCE
Bolt Dia
Q'ty
mm
27 2
22 2
18 4
14 8
20 4
16 8
16 8
3
1 – — –12UNF
16
7
1 – — –12UNF
16
12 10
16 4
12 2
20 4
20 6
22 26
18 24
12 2
16 6
22 2
30 36
27 36
22 40
18 8
22 48
18 24
7-109
Wrench
LOCTITE
Size (mm) N•m
41 1050
*
32 750
27 400
22 210
*
30 550
*
24 210
*
24 210
*
36 180
41 210
(not required)
19
*
230
H14
19 110
30 400
*
30 400
*
32 750
300
H14
19
24 210
32 550
46 1950
41 1400
32 750
27 300
32 750
27 400
Torque
(kgf•m) (lbf•ft)
(105) (770)
(75) (550)
(40) (295)
(21) (155)
(55) (405)
(21) (155)
(21) (155)
(18) (135)
(21) (155)
90 (9) (66)
(23) (170)
(11) (80)
(40) (295)
(40) (295)
(75) (550)
(30) (220)
35 (3.5) (26)
(21) (155)
(55) (405)
(195) (1440)
(140) (1030)
(75) (550)
(30) (220)
(75) (550)
(41) (295)