the 'todays job' thread

[AHPP]

That looks like a lovely job. Conifers smell fabulous.

[openspaceman]

 

 

1 hour ago, openspaceman said:

I don't have a lot of experience of the guts of track motors but the motor is often a swash plate piston motor driving through a set of planetary gears for the big reduction ratio. Once pressure is removed a spring loaded transmission brake is applied to the motor shaft, often a band brake.

I used to have an Hinowa manual with track mot0r diagrams, the  final drive were an italian firm with a name like Bernouli but...

 

I found this (forgive the chinglish):

The swash plate motor and axial pistons circled blue provide the rotational power. The disc brake is applied by the springs and released when pressure is sent to the motor , a shuttle valve then allows pressure from either the forward or reverse lines to operate the brake piston to release the brake via a shuttle valve. The shuttle moves from the pressure side to block off the line to the other side.

[openspaceman]

1 hour ago, Mick Dempsey said:

I’ll get a pic tomorrow in the light. 

In the meanwhile; small Riko A frame pto winches had both a friction brake and a crude ratchet sprag clutch  which applied directly to "teeth" cut into one side of the cable drum. I never liked it  because if you winched in so far that the hook touched the fairlead when you left the pawl down inadvertently everything jammed up.

 

You could try something like this spring loaded one way wire rope clutch to hold tension, it is a beefy mechanical prussic like device.

 

[AHPP]

1 hour ago, openspaceman said:

 

 

I used to have an Hinowa manual with track mot0r diagrams, the  final drive were an italian firm with a name like Bernouli but...

 

I found this (forgive the chinglish):

The swash plate motor and axial pistons circled blue provide the rotational power. The disc brake is applied by the springs and released when pressure is sent to the motor , a shuttle valve then allows pressure from either the forward or reverse lines to operate the brake piston to release the brake via a shuttle valve. The shuttle moves from the pressure side to block off the line to the other side.

 

Got it. Clever.

[roboted]

Just a thought,  the wire doesn't look that tidy on the drum.

Possibly just the wire tightening  up on the drum under load and releasing slack.

Like I said just a thought 🙂

[Dan Maynard]

2 minutes ago, roboted said:

Just a thought,  the wire doesn't look that tidy on the drum.

Possibly just the wire tightening  up on the drum under load and releasing slack.

Like I said just a thought 🙂

I had that thought but was letting the more knowledgeable lead the way.

[Mick Dempsey]

8 hours ago, roboted said:

Just a thought,  the wire doesn't look that tidy on the drum.

Possibly just the wire tightening  up on the drum under load and releasing slack.

Like I said just a thought 🙂

Appreciate the input.

We’ve done loads of testing, it’s not that.

[Mark Bolam]

On a three day job at the minute which the unbelievably dry weather has made a joy.

100m long garden with the bulk of the work at the bottom.

WQ and chipper down the lawn without using any boards.

A couple of weeks back you would have needed a hovercraft.

Everything staying in the ‘wild’ area.

 

Most challenging aspect was getting an overstood cob stand over a 10’ deep gulley.

High crane point in an ash saved the day!

 

 

[Dan Maynard]

Always love a wild area!

[Dan Maynard]

Spoke too soon, love a wild area unless there's a bee's nest 5m up the tree. Abandoned that job for today, come back with a plan another day.....