Workshop Manual

4
42 Workshop Manual, TPD 1458E, issue 3 - Perkins Confidential: Green
400 Series
Connecting rod bearing clearance
To check Operation 4-10
To check the clearance between the crankshaft bearing journal and the bearing cap.
1 Clean the bearing surfaces and the exposed half of the crankshaft journal.
2 Fit the bearing caps and tighten the bearing cap to torque.
3 Remove the bearing cap of the clearance to be checked.
4 Place a piece of Plastigauge ® across the full width of the bearing surface on the crankshaft journal, fit the
bearing cap and tighten the bearing cap setscrew to the specified torque.
5 Remove the bearing cap but do not move the Plastigauge ®.
6 Use the Plastigauge ® envelope to measure the widest point of the Plastigauge ®. This reading indicates
the bearing clearance in thousandths of an inch.
7 If the bearing clearance is not within the specifications the crankshaft must be reground and undersize
bearings fitted.
Engine Torque Nm (lbf ft) kgf m
403C-11 Bearing carrier setscrew 23 (16.9) 2,3
403C-15, 404C-22 and 404C-22T Bearing carrier setscrew 52 (38.3) 5,2
Engine Journals Standard clearance Service limit
403C-11
1 and 2 0,039 - 0,092 mm (0.00150 - 0.00360 in) 0,20 mm (0.0079 in)
3 0,029 - 0,082 mm (0.00110 - 0.00320 in) 0,20 mm (0.0079 in)
403C-15, 404C-22 and 404C-22T All 0,035 - 0,085 mm (0.00138 - 0.00335 in) 0,20 mm (0.0079 in)
H1066
PLASTIGAUGE
1.0
2.0
3.0
4.0
5.0
6.0
7.0
2.5
INCH