TM-9-2815-220-24
AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TM-9-2815-220-24 - Page 1231 of 1563
TM 9-2815-220-24
CYLINDER VALVES AND ASSOCIATED PARTS REPAIR
0145 00
INSPECTION (Continued)
7. Inspect inner spring (5), intermediate spring (6), and outer spring (7) for wear, cracks,
collapse, or other evidence of failure.
Replace springs when worn, cracked, or otherwise
damaged.
8. Measure springs (5, 6, and 7) using a valve spring tester.
Replace springs that do not meet
specifications in the following table.
Location
Sizes and Fits of New Parts pounds (Kg)
Wear Limits
Inner valve
spring
(small)
Scale reading at 1.3-inch (33.020)
Scale reading at 2.07-inch (52.578)
Maximum solid height
43.9 (19.9306)
26.2 (11.8948)
1.28 inch (32.5 mm)
+/- 4.39 (1.9930)
+/- 1.31 (0.5947)
none
intermediate
valve spring
(medium)
Scale reading at 1.56-inch (39.624)
Scale reading at 2.26-inch (57.404)
Maximum solid height 1.4 (0.6356)
81.4 (36.9224)
51.7 (23.4718)
1.34 inch (34.036 mm)
+/- 8.14 (3.6995)
+/- 2.60 (1.1804)
none
Outer valve
spring
(large)
Scale reading at 1.56-inch (39.624)
Scale reading at 2.26-inch (57.404)
Maximum solid height 85.4 (38.7716)
134.2 (60.9268)
85.4 (38.7716)
1.47 inch (37.338 mm)
+/- 13.42 (6.0926)
+/- 4.27 (1.9385)
none
9. Inspect spring retainer locks (8) for wear or cracks.
Worn locks will have ridges on top face.
Replace locks that are worn or cracked.
10. Inspect lock retainers (9, 10), and seat (11) for wear and cracks.
Replace if worn or cracked.
11. Check rotor (12) by rotating inner section and inspect for wear or cracks.
Replace rotor if
inner section does not rotate freely or is worn or cracked.
8
12
11
5
10
6
6
7
7
5
9
8
WP 0145 00-3
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