TalonDancer
Gold Member
- Joined
- Jul 29, 2007
- Messages
- 388
The BH90 sub-frame consists of three pieces of metal on both sides of the tractor (total 6). The main piece on each side is huge. It is a thick bent metal plate which connects the FEL to the rear axle and continues under the axle to form the mount points for the back-hoe. Some parts of this plate are double thickness (welded). The other two pieces are much smaller and basically connect the larger plate to itself (over the top of the rear axle) and to the rear of the rear axle.
By comparison the std sub-frame on a GL40 seems puny. It consists of two roughly 4in deep, 1/2in thick pieces of bent metal that attach the FEL to the rear axle (one on each side). They are quite heavy. But I can pick up both of them at the same time. By comparison I doubt that I could lift the large end of one of the BH90's main plates.
The reduced ground clearance is mostly due to the BH90 sub-frame being nearly 2in deeper than the std sub-frame. This extra 2in. makes the bottom of the sub-frame lower, since the tranny (or hydro) oil filter stick out above it. The BH90 sub- frame also goes below and behind the rear axle reducing ground clearance several inches in these areas. But there is a upside to this reduced ground clearance -- these honkin' hunks of metal are roughly 2in lower than the vulnerable HST drain plugs
FWIW if you have a Kubota GL sales brochure...
The L3940 on page 16 has the std sub-frame. And nearly all of the other GLs shown have a BH75 or BH90 sub-frame. For example the L3240 on page 6 has a BH75 sub-frame. The L5740 on page 22 shows how the BH sub-frames get much deeper toward the rear.
Talon Dancer
By comparison the std sub-frame on a GL40 seems puny. It consists of two roughly 4in deep, 1/2in thick pieces of bent metal that attach the FEL to the rear axle (one on each side). They are quite heavy. But I can pick up both of them at the same time. By comparison I doubt that I could lift the large end of one of the BH90's main plates.
The reduced ground clearance is mostly due to the BH90 sub-frame being nearly 2in deeper than the std sub-frame. This extra 2in. makes the bottom of the sub-frame lower, since the tranny (or hydro) oil filter stick out above it. The BH90 sub- frame also goes below and behind the rear axle reducing ground clearance several inches in these areas. But there is a upside to this reduced ground clearance -- these honkin' hunks of metal are roughly 2in lower than the vulnerable HST drain plugs
FWIW if you have a Kubota GL sales brochure...
The L3940 on page 16 has the std sub-frame. And nearly all of the other GLs shown have a BH75 or BH90 sub-frame. For example the L3240 on page 6 has a BH75 sub-frame. The L5740 on page 22 shows how the BH sub-frames get much deeper toward the rear.
Talon Dancer