oil drain is not on the pony, it's on the right side of the clutch housing below the pony. There's a passageway through the clutch housing casting with a spigot bolted onto it.
Here is the Pony motor Oil Drain Tube on my D2 (note missing lower side panels, got some for sale?). The drain tube bolts to the lower left front corner of the Pony block, just above the bell housing. Your D4 should look similar.
[attachment=12321]D2 pony oil drain 001.jpg[/attachment]
These drain tubes are prone to breaking off and I've seen a few Cat's that just have a small plate bolted on to the pony block in place of the drain tube. If your D4 has one of those cover plates you'll have to remove it and things will get messy from there.
Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.
Chapter Fifteen
| Placerville, CAChapter Nineteen
| 1234 Carngham-Lake Goldsmith Rd, Lake Goldsmith, Victoria, 3373, AustraliaChapter Two
| Stradsett, Nr Downham Market. Norfolk PE33 9HA UKChapter Two
| Faulkner Farm, West Drove, Wisbech, Cambridgeshire, PE14 7DP, UK
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