Hitachi ZAXIS 450LC-3 Operator's Manual page 383

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.
ZX850LC
-3
No
Engine cushion rubber mounting
1
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
f
NOTE: H Hexagonal socket wrench
* If a loose bolt is found, remove the bolt. Remove the LOCTITE coating remaining in the bolt hole and clean inside the
bolt hole. After applying LOCTITE to the bolt, reinstall the bolt. In case the bolt has been deformed, replace the bolt
with a new one.
Descriptions
Fan side
Pump side
Fan side
Pump side
MAINTENANCE
Bolt Dia
Q'ty
mm
27 2
33 2
14 8
20 12
27 4
24 4
20 8
18 8
3
1 – — –12UNF
16
7
1 – — –12UNF
16
12 14
20 8
16 4
12 2
20 4
20 8
24 28
20 24
12 2
16 6
33 41
30 48
27 48
18 8
27 48
22 24
7-113
Wrench
LOCTITE
Size (mm) N•m
41 1050
50 1950
22 210
*
*
30 400
41 1050
36 950
*
30 400
*
27 300
36 180
41 210
*
19 110
400
H17
210
H14
19 110
*
30 400
*
30 400
36 950
30 400
19 35
24 210
50 2200
46 1750
41 1400
27 300
41 1400
32 750
Torque
(kgf•m) (lbf•ft)
(105) (770)
(195) (1440)
(21) (155)
(40) (295)
(105) (770)
(95) (700)
(40) (295)
(30) (220)
(18.0) (135)
(21.5) (155)
(11) (80)
(40) (295)
(21) (155)
(11) (80)
(40) (295)
(40) (295)
(95) (700)
(40) (295)
(3.5) (26)
(21) (155)
(220) (1620)
(175) (1290)
(140) (1030)
(30) (220)
(140) (1030)
(75) (550)