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Buddy
Buddy, Technician
Category: Heavy Equipment
Satisfied Customers: 730
Experience:  20 years experience. Freightliner tech for last 14 years
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Im setting the overhead on a 1999 series 60 detroit diesel,

Customer Question

Im setting the overhead on a 1999 series 60 detroit diesel, according to the valve cover the injector sets at 80.3mm, the intake valves at .008 and the exhaust valves at .026, i've done all this no problem, then i installed the jake brake, model 765a, it's stamped on the tag to set at .023, this confuses me, after setting it to .023 it lessens the exhaust valve clearance to .023, how can this be right?
Submitted: 4 years ago.
Category: Heavy Equipment
Expert:  Buddy replied 4 years ago.

HiCustomer Welcome to JA. I am Buddy, and i will try and help you out if you are still needing help.

 

You are correct on lash settings. When you set the jakes to .023 you should still have .026 between the valve stem and the exhaust valve. You should have .023 on top of exhaust valve adjuster on the flat spot and jake cylinder. I hope this is helps you out. If you have anymore questions, or info just ask.

 

Thanks
Buddy



Edited by Buddy on 11/8/2009 at 2:10 AM EST
Buddy, Technician
Category: Heavy Equipment
Satisfied Customers: 730
Experience: 20 years experience. Freightliner tech for last 14 years
Buddy and other Heavy Equipment Specialists are ready to help you
Customer: replied 4 years ago.
You say I should have my .026 between the valve stem and the adjuster but I dont because the top of the adjuster contacts the bottom of the jake surface first, it's seems to me that the only way to maintain .026 at the valve is to set the jake at .026 or greater, this is what a Cummins engine does, the valve sets at .027 and the jake at.030, this makes sense to me. In summary, I have .026 valve clearance without the jake assembly installed, after I install the jake and set it to .023, I can only get a .023 feeler gauge at the valve. Thanks.
Customer: replied 4 years ago.
My problem is that when I recheck my valve clearance I dont have .026 because the top of the valve adjuster contacts the bottom of the jake surface because it is set at .023, on a Cummins engine for example, the valve sets at .027 and the jake sets at .030, this makes sense to be. The only way I see that it's possible to maintain .026 is to set the jake at .026 or greater, still confused, let me know, thanks.
Expert:  Buddy replied 4 years ago.
Thanks for the accept,no need to accept again.It will still take the same amount of movement of the rockerarm to open the valve.Let me verify settings of jakes. What is your engine serial number and the model number on jakes.

Thanks

Customer: replied 4 years ago.
Unit #06R0455457 SO#436069 MODEL#6067TK60 SPEC#S0124802 032 L18279 JAKES ARE MODEL#765A 470HP
Expert:  Buddy replied 4 years ago.
Thanks for reply. When I get home from work I will do some double checking for you


Thanks
Expert:  Buddy replied 4 years ago.

No need to click accept again. Sorry for having to wait on me. I checked and those are the correct settings. I know what you are saying about the lash. I have never thought about it that way, i have set many that way, but never checked the valve clearance after i set the brake. I would assume it still would be correct, because the rocker arm will still have to turn the same amount to open valve with or without jake. The lash will be tighter due to jake piston but it still will open at the same time and the same amount of clearance.I hope this helps you out. I am also posting the specs on the jakes and valves.

 

Here is info on injectors and valves.

Components ‡?

Setting Dimensions?

Tolerance †?

FUEL INJECTOR HEIGHTS Models: 6067GT40, 6067WT40, 6067WU40,6067GU40, 6063WU00, 6063GU00,6067WU60, 6067GU60, 6067GU91 (All DDEC I and DDEC II / 1986 - 1993)?

78.2 mm (3.079 in.) Use tool J-35637-A ?

77.95 - 78.45 mm (3.069 - 3.089 in.)?

FUEL INJECTOR HEIGHTS Models: 6064TKXX, 6063TKXX, 6063EKXX, 606XGKXX, 606XWKXX, 606XSKXX (All DDEC III 1994-1997)?

78.8 mm (3.102 in.) Use tool J-39697 32J cam?

77.55 - 79.05 mm (3.053 - 3.112 in.)?

FUEL INJECTOR HEIGHTS Models: 6067TKXX, 606XPKXX, 606XGKXX (1997-98 DDEC IV and later 1997 DDEC III)?

80.3 mm (3.161 in.)Use tool J-42665 47J cam?

80.05 - 80.55 mm (3.152 - 3.171 in.)?

FUEL INJECTOR HEIGHTS Models: 6067EKXX, 606XBKXX, 606XMKXX, 606XLKXX, 606XHKXX, 606XFKXX (1998 & 1999 DDEC IV)?

81.0 mm (3.189 in.)Use tool J-42749 65J cam 92J cam?

80.75 - 81.25 mm(3.179 - 3.199 in.)?

FUEL INJECTOR HEIGHTS Models: §?

6067BKXX, MKXX, HKXX?

?

6067MKXX?

?

606XBKXX?

?

?

606XMKXX?

?

82.1 mm (3.23 in.) Use tool J-45002 w/101J cam?

81.0 mm (3.189 in.) Use tool J-42749 w/92J cam?

82.1 mm (3.23 in.) Use tool J-45002 w/107J cam on off-highway units only?

82.1 mm (3.23 in.) Use tool J-45002 w/107J cam on off-highway units only?

0.8128 mm (0.032 in.)?

FUEL INJECTOR HEIGHTS Models:?

6062HKXX, 6062TKXX (2000-2003)?

81.0 mm (3.189 in.)?

80.75 - 81.25 mm?

3.179 - 3.199 in.)?

INTAKE VALVE CLEARANCE?

0.203 mm(0.008 in.)?

0.127 - 0.280 mm(0.005 - 0.011 in.)?

EXHAUST VALVE CLEARANCE - * "U" Models: 6067GT40, 6067WT40, 6067WU40, 6067GU40, 6063XX00, (1986 - 1990 All DDEC I & Early DDEC II)?

0.508 mm(0.020 in.)?

0.432 - 0.584 mm(0.017 - 0.023 in.)?

EXHAUST VALVE CLEARANCE - * "H" Models: 606XWUXX, 606XGUXX, 606XXKXX, (1991 - 1999 All DDEC IV, III and later DDEC II)?

0.660 mm(0.026 in.)?

0.584 - 0.736 mm(0.023 - 0.029 in.)?

EXHAUST VALVE CLEARANCE - * "H" Models: 6062HKXX, 6062TKXX (2000 - 2003)?

0.711 mm (0.028 in.)?

0.635 - 0.787 mm (0.025 - 0.031 in.)?

 

 

 

Here is jake specs

MODEL NUMBER/DISPLACEMENT/MODEL YEAR?

ENGINE BRAKE?

SLAVE PISTON ADJUSTMENT?

6067WU40 11.1L PRE - 1991?

760/760A?

0.660 mm (0.026 in.)?

6067GU40 12.7L PRE - 1991?

760/760A?

0.508 mm (0.020 in.)?

6067WU60 11.1L 1991 - 93?

760A?

0.660 mm (0.026 in.)?

6067GU60 12.7L 1991 - 93?

765?

0.660 mm (0.026 in.)?

6067WK60 11.1L 1994 - 97?

760A?

0.660 mm (0.026 in.)?

6067GK60 12.7L 1994 - 97?

765?

0.660 mm (0.026 in.)?

6067WK28 11.1L 1994 - 97?

760A?

0.660 mm (0.026 in.)?

6067GK28 12.7L 1994 - 97?

765?

0.660 mm (0.026 in.)?

6067EK60 11.1L 1998 DDEC IV?

760B?

0.584 mm (0.023 in.)?

6067PK60 12.7L 1998 DDEC IV?

765A?

0.584 mm (0.023 in.)?

6067TK60 12.7L 1998 DDEC IV?

765A?

0.584 mm (0.023 in.)?

6067FK6X, 6067BK6X, 6067HK6X 14L 1999 DDEC IV?

770?

0.584 mm (0.023 in.)?

6067MK6X 12.7L 1999 DDEC IV?

770?

0.584 mm (0.023 in.)?

6067LK6X 11.1L 1999 DDEC IV?

760B?

0.584 mm (0.023 in.)?

6067MK28, 6067MK45, 6067MK57, 6067MK60 - 12.7L Standard - 2000?

790?

0.660 mm (0.026 in.)?

6067BK28, 6067BK45, 6067BK57, 6067BK60 - 12.7L Premium - 2000?

790?

0.660 mm (0.026 in.)?

6067HK45, 6067HK60 - 14L U.S. - 2000?

790A?

0.660 mm (0.026 in.)?

6067WK28, 6067WK60 - 11.1L - 2000?

790B?

0.660 mm (0.026 in.)?

6067LK28, 6067LK45, 6067LK60 - 11.1L - 2000?

790B?

0.660 mm (0.026 in.)?

6063GK60, 6067GK28, 6067GK45, 6067GK91, 6067PK62, 6067TK28, 6067TK60, 6067TK62 - 12.7L - 2000?

790B?

0.660 mm (0.026 in.)?

6067HK62 - 14L Australian - 2000?

790C?

0.660 mm (0.026 in.)?

6067MK28, 6067MK45, 6067MK57, 6067MK60 - 12.7L Standard - 2000?

795?

0.813 mm (0.032 in.)?

6067BK28, 6067BK45, 6067BK57, 6067BK60 - 12.7L Premium - 2000?

795?

0.813 mm (0.032 in.)?

6067HK45, 6067HK60 - 14L U.S. - 2000?

795?

0.813 mm (0.032 in.)?

6067WK28, 6067WK60 - 11.1L - 2000?

795?

0.813 mm (0.032 in.)?

6067LK28, 6067LK45, 6067LK60 - 11.1L - 2000?

795?

0.813 mm (0.032 in.)?

6063GK60, 6067GK28, 6067GK45, 6067GK91, 6067PK62, 6067TK28, 6067TK60, 6067TK62 - 12.7L - 2000?

795?

0.813 mm (0.032 in.)?

6067HK62 - 14L Australian - 2000?

795?

0.813 mm (0.032 in.)?

6067HK2E, 6067HK6E 14L- 2003?

797?

0.508 mm (0.020 in.)?

6067MK2E, 6067MK6E 12.7L- 2003?

797?

0.508 mm (0.020 in.)?

6067HV2E, 6067HV6E 14L- 2004?

797?

0.508 mm (0.020 in.)?

6067MV2E, 6067MV6E 12.7L- 2004?

797?

0.508 mm (0.020 in.)?

 

 

If you have anymore questions, just ask.

Thanks

Buddy

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