5-7. AXLE AND BRACKET ASSEMBLY SPRING SEAT MAINTENANCE (Cont).
b. CLEANING, INSPECTION, AND REPAIR
Dry cleaning solvent, P-D-680, Is toxic and flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO NOT use near open flame or excessive heat.
The solvents flash point is 100°F-138°F (38°C-59°C). If you become dizzy while
using cleaning solvent, immediately get fresh air and medical help. If solvent contacts
eyes, immediately wash your eyes and get medical aid.
Clean mud and dirt off exposed surfaces of spring seat with water and scrub brush. Remove grease from all
parts with dry cleaning solvent.
Inspect for broken or cracked parts and damaged threads. Replace any damaged parts.
Clean and inspect outer and inner tapered bearings in accordance with TM 9-214. If tapered bearings are
damaged, bearing cups (15) must also be removed from spring seat and replaced.
Inspect bearing seats and oil seal surfaces for roughness or damage. File or grind smooth high spots, burrs, or
Measure inside diameter of spring seat bearing surfaces. Inside diameter should be 4.4345-4.4365 in.
(112.6363-112.6871 mm). Replace spring seat if bearing surfaces are worn beyond wear limit.
Inspect plug (16) for damage. Replace if damaged.
Loosely install two new Iockwashers (25) and bolts (7) in spring seat (4).
Coat new oil seal (13) and new oil seal washer (11) with lubricating oil. Pack outer and inner tapered bearings
(17 and 14) with grease in accordance with TM 9-214.
Install flatwasher (10), new oil seal washer (11), packing retainer (12), new oil seal (13), and inner tapered
bearing (14) on spindle (26) of tandem axle.
Install machine key (9) inside spring seat (4).
Install spring seat (4) on spindle (26) of tandem axle. Ensure that machine key (9) is fully seated in machine key
groove of spindle.
Install outer tapered bearing (17) and inner adjusting nut (18). Torque inner adjusting nut to 70 Ib.-ft. (95 N-m).
Back off inner adjusting nut approximately ¼ turn, Spring seat (4) should turn freely without lateral movement.
Install outer adjusting nut (20) on spindle (26) of tandem axle. Torque outer adjusting nut to 150 Ib.-ft. (203 N-m).
Bend over two tangs of keywasher (19) on each adjusting nut (18 and 20).
Install new gasket (21) and access cover (22) on spring seat (4) with six bolts (24) and new Iockwashers (23).