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6.9L Diesels Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

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Old 11-09-2005, 12:21 PM   #1 (permalink)
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Source for rebuilt cruise control servo's

The cruise control on my 1986 F250 is going out. I'm pretty sure the diaphragm in the servo has a leak because you can engage the cruise, then use your foot to get it to the correct speed and it will hold it awhile. If you just set it, it wont pull the throttle. I can remeber when you could get complete rebuilt cruise control units. So far no luck. Anybody have a source?
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Mine: 91 F250 Reg Cab 4x4 5spd 7.3IDI 4.10LS 145,000 miles. Banks Sidewinder 92 D60 F axle w 97 brakes and Powerlock. Lift: about 4" over stock 250. 33x12.50x16.5 Pro Comp MTs Magnaflow 12" muffler. Sees dirt everyday. Used to haul hay, wood, feed cows, check fence.
Hers: 96F250 CCSB 7.3 PSD 4x4 5spd 3.55 LS 190,000 miles. Puchased 7/03, Looked for a 5spd CCSB for a year!Dana 60 front axle, at stock F350 height (for now) Energy Poly bushings, Bilsteins, 305/70/16 Pro Comps on 16x10 Weld Outbacks, AFE Pro7,TYMAR 3x3.5x4 downpipe,TYMAR 5" straightpipe, gutted EBV, IH Non EBV pedistal,New Alliant AC Injectors,(stage 1)Cal reg kit, SBC Con O clutch, permenent clutch bushing fix, AC mod with a different twist, AMP Powersteps with custom brackets and wiring(one of 2 OBS trucks with them according to AMP) Line of Fire. Sees dirt everyday.
My Company pickup: 86 F250 6.9 C6 320,000 miles Co trucks 5 89 to 94 IDI's, plus about 50 more diesels.
Diesel Mechanic 34 yrs Maintenece Manager 23 yrs
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Old 11-09-2005, 07:51 PM   #2 (permalink)
LRH
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Re: Source for rebuilt cruise control servo's

A lot speedometer shops also do cruise control parts. One I did business with years ago did Ford and GM cruise control parts as well as factory radios/amps on an exchange basis during the warranty period.
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Old 11-09-2005, 08:22 PM   #3 (permalink)
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Re: Source for rebuilt cruise control servo's

There is a dump valve on the brake pedel that may be out of adjustment. If that isn't right it will leak vacuum and give similiar symptoms that you describe. Might be worth a look.
Good luck,
Doug
'86 F-250 4x4
'89 E-250 ATS
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Old 11-09-2005, 09:31 PM   #4 (permalink)
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Re: Source for rebuilt cruise control servo's

Thanks guys, both great ideas! Keep em comin!
__________________
Mine: 91 F250 Reg Cab 4x4 5spd 7.3IDI 4.10LS 145,000 miles. Banks Sidewinder 92 D60 F axle w 97 brakes and Powerlock. Lift: about 4" over stock 250. 33x12.50x16.5 Pro Comp MTs Magnaflow 12" muffler. Sees dirt everyday. Used to haul hay, wood, feed cows, check fence.
Hers: 96F250 CCSB 7.3 PSD 4x4 5spd 3.55 LS 190,000 miles. Puchased 7/03, Looked for a 5spd CCSB for a year!Dana 60 front axle, at stock F350 height (for now) Energy Poly bushings, Bilsteins, 305/70/16 Pro Comps on 16x10 Weld Outbacks, AFE Pro7,TYMAR 3x3.5x4 downpipe,TYMAR 5" straightpipe, gutted EBV, IH Non EBV pedistal,New Alliant AC Injectors,(stage 1)Cal reg kit, SBC Con O clutch, permenent clutch bushing fix, AC mod with a different twist, AMP Powersteps with custom brackets and wiring(one of 2 OBS trucks with them according to AMP) Line of Fire. Sees dirt everyday.
My Company pickup: 86 F250 6.9 C6 320,000 miles Co trucks 5 89 to 94 IDI's, plus about 50 more diesels.
Diesel Mechanic 34 yrs Maintenece Manager 23 yrs
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Old 11-11-2005, 09:08 AM   #5 (permalink)
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Re: Source for rebuilt cruise control servo's

Got to thinking about low vacuum. There is another vacuum can on the drivers side almost directly under the servo. Mine was very rusted out. Looks like the fruit juice can. Keep us posted.
Thanks, Doug
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