Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
9
Section V Tightening Torque for Critical Bolts of Engine
Comparison Table of Tightening Torque for Critical Bolts ☆
No. Description
N．m
1 Fixing bolt of rockshaft 55
2 Heater plug 25
3 Nut and washer for fuel injector body 40
4 Fuel injector 34
5 Fixing bolt of thermostat housing assembly 25
6 Installation torque of rocker arm assembly 55
7 Camshaft thrust plate bolt 25
8 Camshaft timing gear bolt 110
9 Fixing bolt of rockshaft 50
10 Fixing bolt of engine oil pump filter screen assembly 20
11 Engine oil pump fixing bolt 20
12 Oil sump bolt 23.5
13 Flywheel baffle bolt 85
14 Flywheel bolt 25 for first step
70 for second step
120 for third step
15 Crankshaft bearing cap bolt 20 for first step
110 for second step
170 for third step
16 Tightening bolt of engine oil pump 25
17 Socket nut of engine oil pump 30
18 Torque for cylinder head bolt:
65 for first step
85 for second step
105 for third step
19 Rockshaft support bolt 55
20 Main bearing cap bolt 170
21 Torque for drive shaft nut 66
22 Transmission bracket nut 69
23 Clutch cover – flywheel housing bolt
M10：46
M12：91
24 Engine rear bracket nut and bolt
M10：40
M12：69
25 Front exhaust pipe bolt 37
26 Clutch working cylinder bolt 19
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