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Tightening Torques Cylinder Block: Valid For Serial Numbers Model Production Site Serial Number Start Serial Number Stop

The document provides detailed tightening torque specifications for various components of the D12C engine model, including cylinder block, timing gear, and flywheel. It outlines specific torque values in Nm and lbf ft, along with step-by-step instructions for tightening procedures. Additionally, it includes warnings about bolt reuse and the application of sealants for certain components.

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Syed Irfan Basha
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45 views6 pages

Tightening Torques Cylinder Block: Valid For Serial Numbers Model Production Site Serial Number Start Serial Number Stop

The document provides detailed tightening torque specifications for various components of the D12C engine model, including cylinder block, timing gear, and flywheel. It outlines specific torque values in Nm and lbf ft, along with step-by-step instructions for tightening procedures. Additionally, it includes warnings about bolt reuse and the application of sealants for certain components.

Uploaded by

Syed Irfan Basha
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Tightening torques cylinder block

Valid for serial numbers


Model Production site Serial number start Serial number stop
D12C

Front engine mount, cylinder block (M14) 175 Nm (129 lbf ft)
Front engine mount, cross member (M12) 85 Nm (62.7 lbf ft)
Rear engine mount, flywheel housing (M16) 245 Nm (180 lbf ft)
Rear engine mount, rubber pad: ��
step 1 ��
�� 170–180 Nm
step 2 (125.4–132.1 lbf ft)
255 Nm (188.1 lbf ft)
Main bearings: ��
step 1 150 ±20 Nm (110.6 ±15 lbf ft)
step 2 120° ±5°
Connecting rod caps ��
step 1 150 ±25 Nm (111 ±18 lbf ft)
step 2 90° ±3°
Bolt, piston cooling nozzle 24 Nm (17.7 lbf ft)
Thermostat housing ��
Step 1: 10 Nm (7.4 lbf ft)
Step 2: 30 Nm (22 lbf ft)

Timing gear

Timing gear plate 33 Nm (24.3 lbf ft)


Guide pin, timing gear plate 60 Nm (18.4 lbf ft)
Timing gears incl. ring gears, see tightening diagram
"Timing gear"

NOTE! The bolts may only be used 4 times


��
1. Drive gear, camshaft 35 ±3 Nm (26 ±2 lbf ft)
Step 1: 90° ±5°
Step 2: ��
2. Adjustable transfer gear 15 ±3 Nm (11 ±2 lbf ft)
Step 1: 120° ±5°
Step 2: ��
3. Transfer gear 15 ±3 Nm (11 ±2 lbf ft)
Step 1: 120° ±5°
Step 2: ��
4. Drive gear crankshaft 645±25 Nm (447 ±18 lbf ft)
Step 1: ��
5. Transfer gear 15 ±3 Nm (11 ±2 lbf ft)
Step 1: 120° ±5°
Step 2: ��
40 Nm (29 lbf ft)
Transfer gear (power take-off, PTO)
Figure 1
Tightening diagram timing gear

Vibration damper
NOTE!
All bolts must be tightened according to step 1 before they are tightened according to step 2

Vibration damper: ��
step 1 20 Nm (14.8 lbf ft)
step 2 90°

Figure 2
Tightening diagram for vibration damper

Vibration damper, rear (only excavator version): ��


step 1 ��
step 2 60 ±5 Nm (44.2 ±4 lbf ft)
90° ±5°
Timing gear casing

Timing gear casing (upper) ��


M8: 24 ±4 Nm (18 ±3 lbf)
M10: 48 ±8 Nm (35 ±6 lbf)

Figure 3
Tightening diagram for upper timing gear casing

Figure 4
Application of sealant for upper timing gear casing
Figure 5
Application of sealant for lower timing gear casing

Flywheel

The bolts may not be reused.


Flywheel ��
Step 1: 60 ±5 Nm (44.3 lbf ft)
Step 2: 60° ±5°
Flywheel (Versions with power take-off, PTO) 245 Nm (181 lbf ft)

Figure 6
Tightening diagram for flywheel

Flywheel housing 140 Nm (103 lbf ft)


Figure 7
Tightening diagram for flywheel housing

Figure 8
Applying sealant on cylinder block

Packbox console (Versions with power take-off, PTO) 15 Nm (11 lbf ft)

Ladder frame

Step 1: Bolts 1-6 48 Nm (35.4 lbf ft)


Step 2: Bolts 7-26 15 Nm (11 lbf ft)
+ 90°
Figure 9
Tightening diagram ladder frame
Timing gear plate

Figure 10
Application sealant for timing gear plate

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