Volvo Penta TD520GE Workshop Manual page 14

Technical data
These tightening torques apply to oiled bolts and nuts. Parts that have been degreased (washed) should be oiled
before they are fitted.
Special tightening torque's
Group 21 Engine
Engine mounting ....................................................
Starter motor ..........................................................
Gear casing ...........................................................
Main bearing caps
Screws to main bearing caps are reusable only three times.
Step 1 .................................................................
Step 2 .................................................................
Step 3 .................................................................
Connecting rod big-end bearing
Use new screws every time.
Step 1 .................................................................
Step 2 .................................................................
Step 3 .................................................................
Flywheel
A) Flywheel with screws of max 30 mm length
Step 1: ................................................................
Step 2: ................................................................
Step 3: ................................................................
B) Flywheel with screws up to 45 mm length
Step 1: ................................................................
Step 2: ................................................................
Step 3: ................................................................
C) Flywheel with a screw length between 50 – 85 mm
Step 1: ................................................................
Step 2: ................................................................
Step 3: ................................................................
Flywheel housing
M12 .......................................................................
M16 .......................................................................
lbf.ft) ......................................................................
Cylinder head
See previous page.
V-belt pulley
Screws to V-belt pulley are reusable only three times.
Step 1: ................................................................
Step 2: ................................................................
Step 3: ................................................................
Vibration damper ....................................................
Screw, rocker cover ...............................................
Lock nut, valve clearance adjusting screw .............
Screws, rocker arm fixing ......................................
Screws, crankcase ventilation ................................
24
Tightening torque
Nm / angle tightening
260
70
(±2)
21
50
tighten angularly 60°
tighten angularly 60°
50
tighten angularly 60°
tighten angularly 60°
20 – 30
tighten angularly 60°
tighten angularly 30°
20 – 30
tighten angularly 60°
tighten angularly 60°
30 – 40
tighten angularly 60°
tighten angularly 60°
(±10)
99
(±25)
243
45 (±5)
tighten angularly 60°
tighten angularly 60°
70
(±1)
11
20 (±2)
21
(±1)
9
Group 20
(lbf.ft)
(192 lbf.ft)
(51.6 lbf.ft)
±1.5
(15.5 lbf.ft)
(37 lbf.ft)
(22 lbf.ft)
(15 – 22 lbf.ft)
(15 – 22 lbf.ft)
(22 – 30 lbf.ft)
±7
(73 lbf.ft)
±18
(179
(33 ±3.7 lbf.ft)
±0.7
(8 lbf.ft)
(14.5 ±1.5 lbf.ft)
(15.5 lbf.ft)
±0.7
(6.6 lbf.ft)