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Any brand log trucks

H

Hayesno1

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kshansen

kshansen

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Bluox said:
769s came with a retarder.
Bob
Click to expand...
It's been many years since I worked on those 769's but I was thinking what they had was the rear the rear brakes were wet disks with large oil cooling lines running to an oil cooler on the side of the engine. Do recall there was what some referred to as a "trolley valve" on the right side of the steering column that applied the rear brakes and would hold pressure at any point in the range of the valve.

This was different than the set up on the Euclids and off-highway Macks which had a large paddle wheel inside the Allison transmission that had the cavity filled with oil when retarder was engaged to cause drag on the driveline of the truck.

One problem with that design was if you had a hose failure while descending a steep grade things would go bad fast! We had one operator learn that fast one day. Picture a fully loaded 65 ton off-highway Mack running away and doing a end over flip in to a ditch where the haul road made a 90º left turn.
 
Chopper95

Chopper95

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JPV said:
View attachment 254232 View attachment 254233
Here some nice fir I hauled today, that is about as much log as that 538 with a dangle head processor wanted to load.
Click to expand...

Never actually seen anyone run a hay rack out west before, always a pole trailer.

Is your last axle steerable or just a lift? How bad is getting in and out of jobs? Obviously not going to many yarder landings I would guess.

I'm on the fence about picking up a tractor to run a hay rack, lowboy, big dump, etc versus sticking with a dump truck and pup combo / hiring out the big moves as usual
 
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JPV

JPV

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We use the hayrack when the job allows it which seems to be about 50 percent of the time. I bounce between that tractor pulling the lowbed or the hayrack and the long logger. If the shovel operator and driver are on the same page you can turn them around in some pretty tight spots. I like it because it can haul anything, both short and long logs. It's nice to not have to back off on weight like you do when hauling shorter logs on a long logger. On the jobs we can't use it we hire a mule train to haul the short logs which is mainly pulp. It also gets used a lot for yard hauling logs between sorting yards and sawmills. That trailer was a two axle tra iler and we added the third lift axle further back which is not steerable. It works pretty good because it pulls like a shorter trailer than it is in the woods with the lift axle up and then axles the weight out really nice with the axle down. Here is the long logger.
IMG_20210115_112219288_1.jpg
 
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