TM 9-2815-250-24&P
Section III. TESTS AND ADJUSTMENTS
Paragraph
Page
Number
Paragraph Title
Number
3-17
Cylinder Compression Test .......................................................................................................... 3-56
3-18
Valve Adjustment......................................................................................................................... 3-58
3-19
Flow Control Valve Adjustment ..................................................................................................... 3-60
3-20
Injection Pump Test..................................................................................................................... 3-65
3-21
Fuel Injector Test......................................................................................................................... 3-66
3-22
Engine Speed Adjustment ............................................................................................................ 3-69
3-23
Oil Pressure Test......................................................................................................................... 3-70
Table 3-1..................................................................................................................................... 3-71
3-17. CYLINDER COMPRESSION TEST.
This Task Covers:
Test
Initial Setup:
Tools/Test Equipment:
Cylinder compression tester (Item 7, Appendix G)
General mechanic's tool kit (Item 14, Appendix G)
TEST
NOTE
The cylinder compression test is used to determine the condition of valves,
pistons, piston rings, and cylinders. Any pressure difference between cylinders
indicates a problem with one or more of these components.
a.
Run engine until thoroughly warm.
b.
Remove fuel injectors (para 3-14).
NOTE
Compression tester gage reading for a new engine turning at about 300 rpm
should be approximately 350 to 400 psi (2410 to 2758 kPa). If there is a pressure
difference between cylinders, refer to paragraphs 3-5 and 3-9 for repair procedures
for valves, pistons, piston rings, and cylinders.
c.
Insert compression tester into fuel injector bore near cylinder no. 1 (2) (on flywheel side of engine).
d.
Crank engine and note compression reading on compression tester gage.
3-56
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