Rupunzell
Bernice Loui
With the TR6 power train ready to install, this web image of how the Horrible Freight engine hoist can fail got me thinking about how to make this now ubiquitous low cost engine hoist can be made safer and nicer to use.
Closer look:
These made in China-Asia engine hoist have changed since these red colored ones. The new ones are made of slightly thicker wall square tubing, still that top support post is in the wrong place (too far forward).
Modification of the HF boom was designed, made and tested as a mock-up. Appears OK.
Prepped for paint:
Zinc Phosphate primer:
Orange painted:
Modified boom installed on HF engine hoist:
This is what the modified HF engine hoist looks like with the modify boom, industrial duty urethane casters (rated at 600 lbs each), knob for the hydraulic cylinder release which allows the up lift handle to remain in place and controlled lowering without shifting the lift handle. The stock chain and hook at the end of the boom has been replaced with a 4000 lb test certified hoist ring. The hoist ring is lower profile, allows 360 degrees of rotation with ease loaded and prevents improper load angles due to boom and load angle changes. All the original bolts ended up in the circular file and have been replaced by modified SAE grade 8 bolts that actually fit the drilled holes and matching nuts with over sized iron structural washers. 5/8" hitch pins allows quick and easy boom length adjustments.
The TR6 power train is visible behind the HF hoist. It is a modified TR6 engine in many ways with a Borg Warner T5 gear box.
TR6 power train partly installed. The modified HF load leveler is visible here. What remains of the original HF load leveler is the welded up frame and center section (very soft steel, discovered during modifications on the mill). The M12 x 1.75 drive screw replaced with a alloy steel thread rod, the end nuts have been modified to accept bronze sleeve bearings. The driver screw can be easy driven by a cordless drill to shift the load angle with ease.
The center piece has been modified for a sleeve bearing with over sized rollers. This center piece is attached to the hoist boom using a 1/2" Crosby G209A alloy steel 3.3T test certified shackle.
The two bar reinforces the frame ends and allows two 2000 lb test certified hoist rings to be installed in place of the awful chain slots, IMO are a failure and hazard waiting to happen. The standard chain harness that comes with these made in China load levelers are a disaster waiting to happen.
TR6 power train installed. No chains were used in the lift rigging. Four Crosby G209A alloy steel 2T lb lift rated and certified shackles were used with two Crosby grade 100 chain connecting couplers. This was done to reduce the distance between power train to hoist boom and still have flexibility in the rigging.
Power train install was uneventful as it should be. Stuff to think about for all who uses engine and similar lifting hardware. After looking at so many images of how car folks rig the lifting of an engine-gear box, stuff that is done wrong is far too common with questionable rigging hardware. It may be low cost, but if that pricey power train is dropped there will be a lot more than just crunched oily bits. Lift rigging and all related IMO must be a ZERO failure system.
Bernice
Closer look:
These made in China-Asia engine hoist have changed since these red colored ones. The new ones are made of slightly thicker wall square tubing, still that top support post is in the wrong place (too far forward).
Modification of the HF boom was designed, made and tested as a mock-up. Appears OK.
Prepped for paint:
Zinc Phosphate primer:
Orange painted:
Modified boom installed on HF engine hoist:
This is what the modified HF engine hoist looks like with the modify boom, industrial duty urethane casters (rated at 600 lbs each), knob for the hydraulic cylinder release which allows the up lift handle to remain in place and controlled lowering without shifting the lift handle. The stock chain and hook at the end of the boom has been replaced with a 4000 lb test certified hoist ring. The hoist ring is lower profile, allows 360 degrees of rotation with ease loaded and prevents improper load angles due to boom and load angle changes. All the original bolts ended up in the circular file and have been replaced by modified SAE grade 8 bolts that actually fit the drilled holes and matching nuts with over sized iron structural washers. 5/8" hitch pins allows quick and easy boom length adjustments.
The TR6 power train is visible behind the HF hoist. It is a modified TR6 engine in many ways with a Borg Warner T5 gear box.
TR6 power train partly installed. The modified HF load leveler is visible here. What remains of the original HF load leveler is the welded up frame and center section (very soft steel, discovered during modifications on the mill). The M12 x 1.75 drive screw replaced with a alloy steel thread rod, the end nuts have been modified to accept bronze sleeve bearings. The driver screw can be easy driven by a cordless drill to shift the load angle with ease.
The center piece has been modified for a sleeve bearing with over sized rollers. This center piece is attached to the hoist boom using a 1/2" Crosby G209A alloy steel 3.3T test certified shackle.
The two bar reinforces the frame ends and allows two 2000 lb test certified hoist rings to be installed in place of the awful chain slots, IMO are a failure and hazard waiting to happen. The standard chain harness that comes with these made in China load levelers are a disaster waiting to happen.
TR6 power train installed. No chains were used in the lift rigging. Four Crosby G209A alloy steel 2T lb lift rated and certified shackles were used with two Crosby grade 100 chain connecting couplers. This was done to reduce the distance between power train to hoist boom and still have flexibility in the rigging.
Power train install was uneventful as it should be. Stuff to think about for all who uses engine and similar lifting hardware. After looking at so many images of how car folks rig the lifting of an engine-gear box, stuff that is done wrong is far too common with questionable rigging hardware. It may be low cost, but if that pricey power train is dropped there will be a lot more than just crunched oily bits. Lift rigging and all related IMO must be a ZERO failure system.
Bernice
. Thanks for sharing.
