Re: 986 advice

Posted by K.B.-826 on July 07, 2006 at 16:42:01 from (24.180.143.24):

In Reply to: 986 advice posted by DJL on July 06, 2006 at 22:29:57:

Get yourself a mechanical guage. I use a regular 100 psi hydraulic guage, a piece of 1/4" hyd hose with female 1/4" NPT fittings on each end, and an adapter to go from 1/8" NPT to 1/4" NPT. Remove the oil pressure sender from the block, install the adapter, and connect the hose/guage to the adapter. You can buy oil pressure test guage kits at your local auto parts store that come with a guage, a length of hose, and a variety of fittings. Check your oil pressure at full throttle with the engine fully warmed up. I don"t have the specs here in front of me, but I would think you should have at least 50 psi. If so, look for a bad oil pressure sender, bad guage, or bad wiring/dirty connections. We have a 786 at home, that guage never reads above the halfway mark. It"s got almost 9000 hours on the engine and still runs like new, so I don"t worry! Like the other guys said, a full adjustment of your clutch pedal/transmission brake/TA linkage will get that tractor shifting like new. You"ll need a manual to do the adjustments, and you must follow the directions to the letter. Before you adjust, you may want to drop the bottom cover from the speed transmission and check/replace the transmission brake pad, it"s easy to do, and Hy-Capacity makes a ceramic pad that lasts longer. The clatter you hear at start-up is normal. The injection pump has an excess fuel device, controlled by engine oil pressure. Whenever there is no oil pressure, the pump goes to full fuel, which helps in cold starting. The engine clatters because it can"t totally burn all of that fuel. If you think your tractor is bad, try starting a worn-out 30 or 40 series Deere with an inline Bosch pump, they wind up to 2000 RPM and blow the thickest, blackest smoke you"ve ever seen until oil pressure builds. As for your A/C, plan on spending about $1500 to have it fully converted to 134A. That"s the only way to go. If you repair the A/C, you"ll pretty much have to put in a cab kit. Using the TA for engine braking was definetly a huge mistake. That"s the best way to fry the TA brake pack.

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