Perkins 900 Series Workshop Manual page 99

5
900 Series
11 Check the main bearing setscrews for distortion and thread damage and renew them as necessary. Ensure
that only the correct setscrews are used. Fit the setscrews to the main bearing caps and tighten the setscrews
gradually and evenly to 152 Nm (112 lbf ft) 15,5 kgf m.
12 Fit the connecting rod caps, see Operation 4-2. Rotate the crankshaft two turns to ensure free movement.
13 Fit the lubricating oil pump, together with the suction pipe and strainer, and the delivery pipe, see Operation
10-11.
14 Fit the lubricating oil sump, see Operation 10-5 or Operation 10-7.
15 Fit the rear oil seal assembly, see Operation 5-2.
16 Fit the flywheel housing, see Operation 13-3.
17 Fit the flywheel, see Operation 13-1.
18 Fit the starter motor, see Operation 14-6.
19 Fit the idler gear, see Operation 6-5.
20 Fit the bridge piece, see Operation 6-14.
21 Fit the timing case cover, see Operation 6-2.
22 Fit the crankshaft pulley, see Operation 5-1.
23 Fit the drive belt, see Operation 14-3, and the fan, see Operation 12-8.
24 After the engine has been installed in the application, fill the lubricating oil sump to the correct level with
an approved oil. Fill the cooling system with antifreeze of the correct specification.
Balance weights
If it is necessary to renew the crankshaft balance weights. These are normally supplied in sets of two and
should be fitted as a set. If one weight is renewed, then the weight difference must not exceed 28,3 g (1 oz.).
The setscrews that retain the balance weights are tightened to 72 Nm (53 lbf ft) 7,3 kgf m.
Note: On later engines, the balance weights are retained by longer setscrews and steel washers. These are
tightened to 72 Nm (53 lbf ft) 7,3 kgf m.
Caution: Do not fit steel washers to the short setscrews as this can cause the balance weights to loosen.
To inspect Operation 5-12
Check the crankshaft for wear and other damage. The maximum permissible wear and ovality on the
crankshaft journals and crank pins is 0,04 mm (0.0016 in).
The main journals and the crank pins of standard size crankshafts can be machined to 0,25 mm (0.010 in),
0,50 mm (0.020 in) or 0,75 mm (0.030 in) undersize on diameter. Refer to the relevant Data and dimensions
given in "Crankshaft overhaul" on page 19. Special undersize bearings are available.
If the seal has been used in all of the service positions, the crankshaft palm can be machined to remove the
wear marks. Further information can be found in the relevant Data and dimensions for the "Crankshaft
assembly" on page 18.
Workshop Manual, TPD 1345E, issue 3 89
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