jatonka
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What would be an acceptable PSI on my military compression gauge for a LDT-465-1D?
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Deuce compression test acceptable PSI
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SCSG-G4
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Since it's supposed to be 22:1, I would thing anything over 310 psi would be in the ballpark. If it's lower it may not have enough compression to heat the air up for reliable ignition.
rustystud
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Since it's supposed to be 22:1, I would thing anything over 310 psi would be in the ballpark. If it's lower it may not have enough compression to heat the air up for reliable ignition.
Here is the information.View attachment Scan0161.pdf
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compression test multifuel
TM 9-2815-210-35 is for LDS which is 22:1 and describes use of a military compression gauge. It indicates 600 to 650 LDS
View attachment cylinder compression test.pdf
also Thanks rustystud
this one shows 500 to 550 for LDT?
View attachment cylinder compression test LDT.pdf
Maybe the extra rings on a LDS improve compression?
TM 9-2815-210-35 is for LDS which is 22:1 and describes use of a military compression gauge. It indicates 600 to 650 LDS
View attachment cylinder compression test.pdf
also Thanks rustystud
this one shows 500 to 550 for LDT?
View attachment cylinder compression test LDT.pdf
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jatonka
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Thank you all for your help. I did the test on a cold engine and my pressures came out low but quite even across all 6 cylinders. I got 230-240 PSI. I will get the truck warmed up well and try it again. John T
gimpyrobb
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Frank, if you keep reading past your highlighted section, it explains some pistons are 20:1 and will have the 500-550 psi reading.
rustystud
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Did you add some oil to each cylinder before doing the test ?
rustystud
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I'm probably guilty of that myself as I just posted the first one I read. Your correct about the compression ratios and PSI readings. In the later Depot TM it mentioned the LDS as being 600 to 650 PSI with the 22:1 compression ratio and I would assume that would also apply to the LDT with 22:1 ratio also.