Goldacres Super Cruiser G8, Operator'S Manual, Page: 125 / 210

Chapter 9 - Boom - 121 G8 Super Cruiser Operator’s Manual MY19 - REV 0
Breakaway - Mid Boom
The back and forth type movement that occurs
when the boom is unfolded in the working position
is controlled by a breakaway mechanism between
the inner and outer boom. It consists of a set of
springs, a turnbuckle, a cable, a pivot mechanism on
the fold cylinder and a pair of dampers connected
to the pivot. The springs are connected to the inner
boom and prevent the boom from moving around
too freely, but also allow the boom to breakaway
when required.
The bi-fold and all other folding cylinders are fed
from the main hydraulic pressure system. The bi-fold
system uses a flow divider to ensure they both fold
evenly.
HYDRAULIC CUSHIONING ADJUSTMENT
An adjustment can be made to the cushioning in
the bi-fold cylinders. When the outer boom folds
out, the cylinder slows towards the end of its stroke
which is pre-set.
When the outer boom folds in for either a bi-fold or
a full boom fold, the cylinder slows down as it gets
closer to full compression. This is to avoid slapping
the inner boom and causing damage.
NOTE: Monitor the outer boom folding to ensure
they are not folding in to quickly. Make adjustments
where necessary.
Use a 13 mm spanner to undo the lock nut. Wind in
the adjustment screw to increase the cushioning and
wind it out to decrease the cushioning. Decreasing
the cushioning will also increase the speed at the
end of the stroke.
The adjuster screw will come to a stop when wound
out to the full adjustment. If this is done, there will be
NO cushioning when the boom is folded.
WARNING: Working with hydraulics can be
dangerous. While operating the boom, all people and
objects should be clear of the boom wing fold radius.
Nobody should be on or near the centre section,
while hydraulic functions are operated.
BREAKAWAY TENSION ADJUSTMENT
The fold hinge between the steel inner and
the aluminium outer has a breakaway system
incorporated into the folding system. When the
boom is fully open and an object hits the aluminium
outer, the boom will fold back against the hydraulic
cylinder and when the boom passes the object,
the springs will bring the hydraulic cylinder back to
working position and have the boom straight.
To set the spring tension the booms must be open.
Ensure the pivot bracket is against the stop, then
adjust the turnbuckle so that there is a 2-3 mm gap
between each spring coil.
This will ensure that there is always pressure on the
hydraulic cylinder when the boom is open.
Lock nut
Adjustment
screw
Boom Adjustment - 36-42 m
D
E
F
C
1 2 3 4
B
A
3 2 1 5
C
D
4 6 7 8
A
B
A3
SHEET 14 OF 14
SCALE:1:7
DWG NO.
TITLE:
GOLDACRES
DO NOT SCALE DRAWING
Material
:
Drawn By:
1-3 MORANG CR
MITCHELL PARK 3352
PH: 03 53426399
FAX: 03 53426308
42m RH Boom Wing
Title
Name
NealHarvey
REV NO CHANGE NAME/DATE ECN NO.
Material <not specified>
DATE EDITED:
2/04/2015
UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE
IN MILLIMETRES
UNTOL. DIMENSIONS
OPEN DIM ± 1.00
ANGULAR ± 0.50°
UNLESS OTHERWISE
TOLERANCED
THIS DRAWING REMAINS THE PROPERTY
OF GOLDACRES TRADING PTY LTD AND IS
SUBJECT OF COPYRIGHT
Surface Finish:
Approved
FINISHED WEIGHT:
787.90 Kg
Drawing Checked:
25/05/2017
REV
DRG. STANDARD
/PRACTICE
AS 1100
DEBUR ALL EDGES
00
-
- -
- -
Pivot bracket to
be touching the
stopper plate
Boom springs
D
E
F
C
1 2 3 4
B
A
3 2 1 5
C
D
4 6 7 8
A
B
A3
SHEET 13 OF 13
SCALE:1:15
DWG NO.
TITLE:
GOLDACRES
DO NOT SCALE DRAWING
Material
:
Drawn By:
1-3 MORANG CR
MITCHELL PARK 3352
PH: 03 53426399
FAX: 03 53426308
42m RH Boom Wing
Title
Name
NealHarvey
REV NO CHANGE NAME/DATE ECN NO.
Material <not specified>
DATE EDITED:
2/04/2015
UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE
IN MILLIMETRES
UNTOL. DIMENSIONS
OPEN DIM ± 1.00
ANGULAR ± 0.50°
UNLESS OTHERWISE
TOLERANCED
THIS DRAWING REMAINS THE PROPERTY
OF GOLDACRES TRADING PTY LTD AND IS
SUBJECT OF COPYRIGHT
Surface Finish:
Approved
FINISHED WEIGHT:
787.90 Kg
Drawing Checked:
25/05/2017
REV
DRG. STANDARD
/PRACTICE
AS 1100
DEBUR ALL EDGES
00
-
- -
- -
Turnbuckle