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#1
07-08-2012, 02:02 AM
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SLS pump drive gear in head off timing chain
Hello, I am reassembling the head on an 85 300 td wagon and have lost the mark on the gear that drives the sls pump. I cannot remember which way the gear faces out. The gear itself is slightly different from one side to the other and I would like to put it back the same way it came out for chain wear reasons. One side of the gear has a rough sand cast finish in the middle and the other side is machined to a more smooth finish with two center punch marks on either side of the splined hole in the center of the gear. Anyone know which side faces out and which side faces in. Thanks. I have looked in the service manual and it does not mention it....at least where I looked. Searched google and other sites.
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#3
07-08-2012, 08:35 PM
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Not me. I searched on here for pictures but the best I could find were Forced Induction's picture with the pump removed when he was blocking off the pump access to the head. Couldn't see the gear in that picture.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#4
07-08-2012, 08:36 PM
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I have an 80 wagon engine sitting on the ground with the valve cover off...
I'm fairly certain I can get a pic up tonight.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#6
07-17-2012, 03:19 PM
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Anyone else know this or have access to more detailed info. I don't want to put it on backwards to find out that the offset is different from one side to the other creating a situation where the timing chain does'nt ride straight on that gear and fly off or something. I am betting that those two punch marks indicate which way faces out but do not know which. I marked it but the mark has come off....I guess paint marker and oil don't agree.Thanks
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#7
07-17-2012, 03:25 PM
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Page 6 chapter 32-640 in the FSM not help then?
__________________
1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior  Don't leave that there - I'll take it to bits!
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#8
07-17-2012, 04:39 PM
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It kinda works, To be more accurate I need a picture of the front of the cam gear. There is a machined surface on one side and more of a raw casting on the other. In 32-640 it does show close to the bottom a cutaway side of the gear which I guess could be construed from the cutaway that there appears to be a larger machined out area on the back side as compared to the front side, but I can't tell by that picture for sure. It is item #36 in the picture second from the bottom of the document titled 615,616 and 617 oil pressure pumps.
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#10
07-17-2012, 04:45 PM
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Just looking at the little cross shaped driver that is behind the pump and is in the shape of a circle. That thing has a slightly different side from one to the other with one side being totally flat and the other being slightly rounded on the corners of the cross shape in the middle. hmm. I wonder if it is suppossed to be facing in or out.
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