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TM 5-4210-220-34
3-8.
ENGINE - Continued
3-8.8
Camshafts - Continued
INSTALLATION
(1)
Insert the front end of camshaft (6) with the right-hand helix gear (4) through the opening on the right bank
side in the rear end plate until the first intermediate bearing enters the bore. Continue to maneuver the
camshaft and bearings into the engine block until the camshaft gear teeth are about to engage with the
mating gear Use extreme care not to damage the cam lobes during camshaft installation.
(2)
Aline the timing marks of the gear train as detailed in para. 3-8.7 preceding.
(3)
Secure the camshaft rear end bearing (15) to the engine block using three bolts (13) and lockwashers (14).
Rotate the camshaft gear (4) as required to install the bolts through the hole in the web of the gear. Evenly
tighten the bolts to 40 ft lb (54 Nm).
(4)
Turn the camshaft intermediate bearings until the holes in the bearings are alined with the tapped holes in the
top of the cylinder block Install the lockscrews (12) and tighten them to 20 ft lb (27 Nm).
(5)
Install the camshaft (7) with the left-hand helix gear (1) through the opening on the left bank side in the rear
end plate similarly to steps 1 thru 4 preceding.
(6)
Attach a new gasket (17) to the camshaft front end bearing (15) that houses oil seal (20). Lubricate the
bearing journal with engine oil (item 17, Appendix B) and slide the bearing on the left bank camshaft with the
bolting flange of the bearing toward the outer end of the shaft. Secure the bearing (15) to the engine block
using three bolts (13) and lockwashers (14). Tighten the bolts to 40 ft lb (54 Nm).
(7)
Lubricate the right bank front end bearing (15) (the bearing without the seal) using engine oil (item 17,
Appendix B). Slide the bearing on the right bank camshaft and secure it to the engine block using three bolts
(13) and lockwashers (14). Tighten the bolts to 40 ft lb (54 Nm).
(8)
Select the spacer (11) with the polished outside diameter. Lubricate the spacer with engine oil (item 17,
Appendix B) and slide it in place on the left bank camshaft (7).
(9)
Install the other spacer (1 1) on the right bank camshaft (6). Only the polished spacer is available for service
and may be used in either position.
(10)
Install a woodruff key (10) in each camshaft (6 and 7).
(11)
Install the pulley (8) on the front end of the left bank camshaft (7), and install the water pump drive gear (9)
(with external weight securely attached) to the right bank camshaft (6).
(12)
Install an internal tooth lockwasher on the front end of each camshaft (6 and 7) and thread retaining nuts (5)
on the camshafts.
(13)
Wedge a clean rag between the camshaft gears (1 and 4) to prevent their turning. Tighten the retaining nuts
(5) on each end of both camshafts to 325 ft lb (441 Nm).
(14)
Install the camshaft gear nut retainers (3) using bolts (2) and lockwashers. Tighten the bolts to 39 ft lb (53
Nm).
3-160
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