Raider 9 repower oil pan question.

[Raider69 65]

I'm switching my B-100 back to a snowblower for next Winter but I also want a plow tractor so I'm pulling my old Raider 9 out of the 20 years of dust and cobwebs in the far corner of my back garage. It was my snow plow tractor until the HH-100 seized up 25 years ago and it did a pretty good job with just tire chains and no weights. I pulled the engine out and was going to replace it but other things came up and it got pushed further and further down the list. I bought an HH-120 for it several years ago but never got it put in, always something more urgent to work on. After having 2 VH-80's suffer the same fate in my Commando V-8 as the HH-100 did I have zero love for that series of Tecumseh and I'm skeptical about how well the HH-120 would hold up, specially since this tractor is going to get worked hard, not often but definitely hard. I stumbled across a good running K301AQS out of an 80's JD 212 on FB Marketplace, the seller had it listed in an odd category so i don't think may people saw it as it has been on there a couple months and it was priced reasonably. It's the narrow base block so it will require some adapting to get it n my Raider. I did some digging here and in WH parts books and found that the engine mounting plate from certain "C" series tractors would work on the narrow base Kohlers. I picked up the plate, isolators and mounting bars off Ebay for a C-81 from 'shuboxlover'.

 

 

 

 

I quickly realized the oil pan sump on my engine wasn't going to line up with the plate properly without raising the engine higher or modifying the plate...... 

(Not my actual pan but identical.)

 

After some more research I found that the C-105 used the same mounting plate system but with this narrow base pan.........

 

The question I have now is, will my oil dipper work with the C-105 pan? 

 

[RandyLittrell 3,885]

2 hours ago, Raider69 said:

The question I have now is, will my oil dipper work with the C-105 pan?

 

I don't believe so, needs to be trimmed for the shallower pan. 

 

 

Randy

[Raider69 65]

2 hours ago, RandyLittrell said:

 

I don't believe so, needs to be trimmed for the shallower pan. 

 

 

Randy

 

 

That would appear to be correct:

(From the Kohler block ID thread)

There are many many styles of oil pans to fit the small base block, other brands of tractors use pans in all shapes, and depths so when swapping this style pan you have to watch how long the oil dipper is on the bottom of the connecting rod, it can be cut to fit a shallower pan, WH used two basic pans on this engine a very shallow pan on the early 10 hp and a mid depth on the shaker plate engines.

 

This pan is a shaker style pan used in the late 70's early 80's on the shaker engines

 

This pan is the flat bottom style used on the 1045, 1055, 1075 and 1046 also used on many Cub engines and other brands, the dipper on the connecting rod is very short on the engines that use this pan.

 

This is a deep pan on a Cub engine, I do believe it uses the same dipper as the large base blocks with the big oil pan.

Edited February 21, 2021 by Raider69

[Raider69 65]

I've been doing some parts manual "archaeology" and if the parts manuals are correct the shaker plate K-301AS in the C-125's used a long dipper connecting rod so I may not have to trim it. Once I have the C-125 pan in hand I'll pull the pan off my engine and clean the gasket surface. I'll put some modeling clay in the sump of the C-125 pan and bolt it on without a gasket then rotate the engine by hand to see if the dipper hits and if not how much clearance it has.

[RandyLittrell 3,885]

You could also measure with a straight edge and micrometer without messing with the clay. Not sure how much clearance is needed though.

 

I have cubs too, so familiar with the pans. Keep us posted! 

 

 

Randy

[Raider69 65]

10 hours ago, RandyLittrell said:

You could also measure with a straight edge and micrometer without messing with the clay. Not sure how much clearance is needed though.

 

I have cubs too, so familiar with the pans. Keep us posted! 

 

 

Randy

I was originally going to compare the pan depths that way but since the sumps are different shapes and positioned a little differently the clay will give me a better picture what's actually going on inside.

[Raider69 65]

The C-125 pan came today, it will be awhile before I can drop the other pan but I measured both from the gasket surface to the bottom on the outside and they are the same depth on the outside so while no guarantee it's quite encouraging. If I do need to trim the dipper it shouldn't be much.