Goldacres Super Cruiser G8, Operator'S Manual, Page: 153 / 210

Chapter 10 - Lubrication & Maintenance - 149 G8 Super Cruiser Operator’s Manual MY19 - REV 0
Hydraulics - 48m
Hydraulic Control Manifold
The 48 metre boom uses a hydraulic control
manifold to distribute the various hydraulic functions
of the boom.
A single central control spool valve allows oil into
the manifold and is operated in concert with poppet
valves for any given boom function. The advantage
of this system is very low oil leakage compared to a
purely spool valve operated system. Therefore any
function operated will tend to stay in place until
operated again later. This creates a safer and more
predictable system for the operator.
The hydraulic system used is a closed centre, load
sensing type.
It uses a variable displacement type 63 cc single
hydraulic pump is a which is attached directly on the
side of the transmission via the PTO shaft. The pump
is used to supply fluid for the steering and most
hydraulic functions excluding the brakes and engine
cooling fan.
After fluid leaves the hydraulic pump it travels
through a priority valve. This valve prioritises flow to
the steering orbital. When the steering system has
received sufficient flow, the priority valve begins to
enable fluid to travel to the rear hydraulic circuit that
controls boom functions. This flow is determined by
the load sense line from the steering orbital.
REVISIONS
REV DESCRIPTION DATE / INITIAL ECN
A3
SHEET 1 OF 1
DRAWING NUMBER:
TITLE:
MATERIAL
:
DRAWN BY:
GA4908670
HYDRAULIC CONTROL MANIFOLD ASSEMBLY,
48M BOOM
NAME
NEALHARVEY
-
MODEL EDITED BY:
23/11/2017
THIS DRAWING REMAINS THE PROPERTY
OF GOLDACRES TRADING PTY LTD AND IS
SUBJECT OF COPYRIGHT
SURFACE FINISH:
WEIGHT: DRAWING EDITED BY:
17/07/2018
REV
00
-
-
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN MILLIMETRES
SHEET
1-3 MORANG CR. MITCHELL PARK.
VICTORIA 3355 AUSTRALIA
PH: 03 5342 6399
DEBURR AND BREAK
SHARP EDGES
NEALHARVEY
17/07/2018
DRAWING CHECKED BY:
12.62 KG
DO NOT SCALE DRAWING
-
UNLESS OTHERWISE SPECIFIED
0. ± 1 ANGULAR ± 0.50°
0.0 ± 0.5
0.00 ± 0.25
D D
C C
B B
A A
1
1
2
2
3
3
4
4
5
5
6
6
Paralift Lock Out Solenoid
There is a lift lockout solenoid for the paralift rams
located on the accumulator manifold, at the rear of
the machine. This feature is used to eliminate boom
bounce when the wings are folded during transport.
This solenoid can be overridden in the event that it
becomes non operational. To do this, locate the red
knob on top of it. Wind the knob all the way in. This
will allow the flow of hydraulic oil to the lift cylinders.
This is a temporary solution to allow the boom
to move up and down. It is recommended to
troubleshoot the system to find the fault. If the
problem cant be diagnosed, contact your dealer.
Centre Levelling System
The centre levelling system requires adjustment
when the boom is folding closed unevenly. See the
tilt adjustment procedure in Chapter 8.
Hydraulic Yaw
The hydraulic yaw circuit typically only requires
attention when changing a component such as a
hose or ram that would allow air into the system.
See the air bleeding procedure in Chapter 8.
Another situation that would require attention is
when the yaw suspension seems to firm or too
soft and is not controlling the boom movement
well. In that case the system pressure should be
adjusted. Test gauges can be directly connected to
the hydraulic control manifold. See the pressure
adjustment procedure in Chapter 8.
Above: Hydraulic control manifold (48m Boom)
Red
knob
Above: Centre level & cable adjusters.