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TM 5-4210-220-34
3-8.
ENGINE.
3-8.7
Gear Train.
This task covers
a.
Removal
b.
Inspection
c.
Installation
d.
Repair
TOOLS
Flex Plate Removed (see TM 5-4210-220-12)
Shop Equipment, AutomotiveFlywheel Housing Removed (see para. 3-8.6)
Maintenance and Repair,
NSN 4910-00-754-0705
MATERIALS/PARTS
11, Appendix D Bearing Test Fixture Plates
10, Appendix B Dry Cleaning Solvent
J21983 Seal Sleeve Installer
17, Appendix B Engine Oil
J8092 Handle
5148810 Blower Drive Support Gasket
J25002 Guide Studs
5198158 Crankshaft Oil Seal Sleeve
J8129 Spring Scale (Part of J5438-01)
5103534 Idler Bearing Retainer Capscrews
8923571 Blower Flex Plate Capscrews
EQUIPMENT CONDITION
8920764 Flex Plates
Engine Removed (see para. 3-8.1)
NOTE
Gear train noise is usually an indication of excessive gear backlash, chipped, pitted or burred gear teeth, or
excessive bearing wear. If a gear train noise develops, all the gears and bearings should be Inspected.
Prior to gear removal, it is advisable to line up and make a sketch indicating the position of the timing marks before
removing or replacing any of the gears in the gear train. Whenever the sealant patch bolts are removed, they should
be replaced with new sealant patch bolts.
REMOVAL
a.
Blower Drive Gear Removal
NOTE
This task can be done with the engine mounted in the truck.
(1)
Remove the blower, see para. 3-8.3.
(2)
Remove the lubrication tube (1) from the blower drive support (4).
(3)
Note the location and remove the blower drive support-to-cylinder block rear end plate attaching capscrews
(2), and copper washers (3).
(4)
Tap the blower drive support (4) with a soft faced hammer to loosen it, then carefully withdraw the support
from the cylinder block rear end plate so the blower drive gear teeth will not be damaged.
(5)
Discard the gasket (5).
3-142
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