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What I?m doing now
Big Sky Redneck
Member Posts: 19,752 ✭✭✭
I know our loggers have done worse but this is different than anything I have done before.
Dump truck with a pup trailer, 10 axles and up to 120,000#. Hauling iron ore from a small mine site on top of a mountain. The video doesn?t show how steep this is but crawling in 2nd gear the engine brake won?t hold this back. Can?t wait till this gets slick 😶
https://youtu.be/zlKdubnsrqk
Dump truck with a pup trailer, 10 axles and up to 120,000#. Hauling iron ore from a small mine site on top of a mountain. The video doesn?t show how steep this is but crawling in 2nd gear the engine brake won?t hold this back. Can?t wait till this gets slick 😶
https://youtu.be/zlKdubnsrqk
Comments
I do not envy you, sir.
Good luck.
Brad Steele
Have fun.
Mule
C & P
Engine Hydraulic Retarders
The hydraulic brake retarders are a whole different animal. Engine hydraulic retarders are mounted on the engine. The Caterpillar Brake Saver is the most popular retarder in this class. This retarder operates on the torque converter principle.
In a normal torque converter, vanes on the input housing (which is attached to the engine crankshaft) transmit power through the fluid coupling to the output shaft vanes of the torque converter, which is connected to the input shaft of the transmission. The hydraulic retarder transmits power from the rotor vanes (which are attached to the engine crankshaft) to the retarder housing vanes (which are attached to the engine block or bellhousing). This produces a hydraulic drag which absorbs vehicle motion energy while activated.
To activate the hydraulic retarder, oil is pumped into the housing, and the housing vanes exert drag due to the swirling oil, upon the rotor vanes. To stop the retarder action, simply drain the chamber, which uncouples the two vanes.
The retarder oil pressure supply is delivered from a secondary section of the engine oil pump. The oil used for the retarder comes from the oil sump of the engine, which must therefore have a larger capacity. This section of the oil pump is entirely separate from the engine lubrication section of the oil pump. This oil pump pressure can be modulated before it reaches the retarder housing. More oil pressure in the retarder housing means more retarding action. Less oil pressure results in less retarding action. While the oil is pressurized within the retarder housing, it is constantly being circulated through the oil cooler and back into the oil sump. This is required to remove the heat generated by the retarder friction.
This retarder has a BrakeSaver control valve which regulates the retarder action once it is activated. This control valve in conjunction with a driver control handle, will set a specific retarder action. As the engine slows in RPM due to the retarding action, the BrakeSaver control valve automatically increases the oil pressure in the retarder housing, which keeps the braking action constant as the pumping action of the retarder vanes decreases.
The retarder control valve also provides a proportioning valve function. The driver control handle will set the retarder force desired, when in manual mode, but while in auto mode, the driver's release of both the throttle and the clutch pedal, will apply maximum retarder action automatically. The proportioning valve uses the larger of these two pressures to control the retarding action.
As required with the above retarders, engine RPM must be kept high for the most retarder effect.
Dumping a pup trailer can be a little tricky is yours a single or double gang wheel model? What make Dump truck is that?
Post a picture of the whole rig if you can.
Oh yea you should put your rifle in the truck I would bet you would have your limit of Mule deer and antelope.
Going to be some interesting video when that gets slick, especially with the pup "helping" you through the turns. Any idea what the elevation drop is between top and bottom?