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66007700 valve clearance

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TJ

10-11-2004 02:17:15




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I would like to set the valve clearance and injection pump timing on my 6600&7700. The 6600 has the CAV rotary pump, the 7700 has the Simms inline. I know where the flywheel window is located, do you set centered in the window for reference or ??? Do you set valves at TDC?Thankyou in advance, Mike.




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Rod F.

10-11-2004 09:41:41




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 Re: 66007700 valve clearance in reply to TJ, 10-11-2004 02:17:15  
The valves are set at TDC on the compression stroke. Intake is .014-.016 and exhaust is .017 - .019 with go nogo gauges or just set at .015 and .018 with straight feeler gauges. That is a cold spec. Pump timing on the CAV pump is generally +1/2 index on the scribe line of the pump, or wherever it was set. I think the Simms should be set at 17 degrees BTDC on a 7700, but I would need to check the book for certain. There should be markings on the timing gears to establish the correct setting, which is not variable. Unless you have a good reason to adjust them, they are probably best left alone. HTH.

Rod

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