JDcrawlers Messageboard

The part number for the air cleaner assembly is AT21533 for a 450 diesel. A part number search at JDparts.com shows that part number shows as only used on the straight 450, not even other equipment besides crawlers. A different assembly was used on the 450Bs and after. Without physically trying othe...

Fixing the starter button and or neutral safety switch would be a good step to prevent that from happening.

According to the parts catalog your 550 should have a Motorola alternator with an external regulator on it. As you are wanting to change to a Delco type one wire you may need to purchase a pulley. I don't remember if the Motorola pulley will work on the Delco type, or if it needs a spacer between th...

If you have a Harbor Freight near you, they have at least 3, ranging from about $11 to about $50. I have the $25 one and for the general needs it works fine and is handy for temperature checks many places, not just an engine. You can scan the radiator core with it running to see if there is flow goi...

Definitely interesting. No Gasoline engine or components are shown in the 450C parts catalog. No gasoline engine option is given in the 450C introduction section with the online parts catalog. There is a 450c spec sheet on the JD non-current construction models and it only shows a turbocharged 4-219...

Welcome to the boards. 15W40 oil rated for diesels will work just fine in your Gas or diesel. Sounds like you have a "modified" 450C, if it really is a C. Does it have wet or dry steering clutches? I believe the 450Cs all left the factory as diesels either naturally aspirated or turbo charged. That ...

Hot water from the engine passes through the thermostat and through the hose to the top of the radiator at the right top inlet connection. cold/cool water is pulled into the engine by the water pump through the left hose hooked to the outlet of the radiator. If the radiator is doing what it is suppo...

Welcome to the Boards. The levers should be independent of each other if one is moving when you pull the other, it sounds like something is still dragging in the linkage. There are no internal adjustments for the steering clutch themselves. Do you have the 450C Technical Manual TM1102? Have you done...

I suggest calling (701-361-0=1006 during CST business hours) or emailing (postmaster@jdcrawlers.com) Lavoy directly, he might have seen or have info about the set up you have.

Welcome to the Boards. From the looks of the sprockets, I have to guess the undercarriage is pretty well shot. It will likely do your work as long as you are careful and not working on side hills or rocky ground. The risk of throwing tracks is higher under those conditions than working on flat groun...

The 450C is a wet steering system machine so the steering clutches and brakes run in oil. With the hydraulic assisted steering on these machines using excessive force on the steering levers can force the self-adjusting brakes, out of adjustment. Gently pull the lever and when the track stops. stop t...

Welcome to the Boards.

Hydraulic pump seal gone bad is the most likely scenario based on your description. That is the only place the two come together I believe.

I replied to the original post, you made about this on the Early Models Board, the other day.

The fuel shutoff solenoid is inside the injection pump. Carefully consider your abilities before you decide to tear into the pump to fix it. You might be better served to have a pump shop go through it and get it refreshed and calibrated properly. If you decide to remove the pump there is a procedur...

The cotter pin you describe is in the weep hole of the clutch housing, a common thing. It is not a tight fit in the hole and its purpose is to jiggle around and keep the hole open to allow any oil from a leaking engine rear main seal (usually dark or black colored) or transmission input/pump seal le...

Haven't we discussed this before? The fuel shut off solenoid inside the injection pump has to remain energized (fuel on) for the engine to run. So yes, you could have a wiring issue. However, I would expect that to cause a run or not run condition, not reduction of electrical power; its either on or...