Hitachi ZW140-6 Operator's Manual page 363

Tightening Torque Chart
Bolt Dia.
mm (in)
N·m (lbf·ft)
6 (0.24)
8 (0.31) 30 (22)
10 (0.39) 65 (48)
12 (0.47) 110 (81)
14 (0.55) 180 (133)
16 (0.63) 270 (199)
18 (0.71) 400 (295)
20 (0.79) 550 (406)
22 (0.87) 750 (553)
24 (0.94) 950 (700)
27 (1.06) 1400 (1033)
30 (1.18) 1950 (1438)
33 (1.30) 2600 (1918)
36 (1.42) 3200 (2360)
d
CAUTION: If counterweight mounting bolts are
loosened, consult your nearest authorized dealer.
IMPORTANT:
 Apply lubricant to bolts and nuts to lower friction
except plated bolts and nuts.
 Remove soil, dust, and/or dirt from the nut and bolt
thread surfaces before tightening.
 Tighten nuts and bolts to specifications. If tightened
with excessively low or high torque, missing or
breakage of nuts and/or bolts may result.
MAINTENANCE
Hexagon Wrench
N·m (lbf·ft) N·m (lbf·ft)
3.3 to 4.2
(2.4 to 3.1)
20 (14.8) 10
50 (36.9) 20
90 (66.4) 35
140 (104) 55
210 (155) 80
300 (221) 120
400 (295) 170
550 (406) 220
700 (516) 280
1050 (774) 400
1450 (1069) 550
1950 (1438) 750
2450 (1807) 950
7-111
Wrench Size
mm
N·m
10
(7.4) 13
(14.8) 17
(25.8) 19
(40.6) 22 140
(59) 24 210
(88.5) 27 300
(125) 30 400
(162) 32
(207) 36
(295) 41
(406) 46
(553) 50
(700) 55
Socket Bolt
Wrench Size
Socket Bolt
mm
(lbf·ft)
5
20 (14.8) 6
50 (36.9) 8
90 (66.4) 10
(104) 12
(155) 14
(221) 14
(295) 17