Grove
Published 01-14-2021 Control # 707-01
2-15
TMS9000-2 SERVICE MANUAL
HYDRAULIC SYSTEM
2
.
4.
Remove the hydraulic reservoir mounted breather,
install the Pump Priming Tool and connect it to a shop air
source.
5.
When a solid stream of fluid, free of air bubbles exits the
T air port, reinstall the plug to port T air at 12Nm (9ft lbs)
while fluid is still coming out.
6.
Remove the shop air supply from the pump priming tool.
7.
Remove the pump priming tool and reinstall the breather
onto the vacated flange mount.
Piston Pump Start-up Procedure (Pump No. 2)
1.
Ensure the hydraulic reservoir is filled to the proper level
and that the fluid is not aerated. If it is aerated let the unit
sit until the air has escaped and fluid is a dark solid color.
2.
If the circuit includes an air conditioning compressor
drive motor ensure it is in the OFF position before initial
start up.
3.
Start the engine and let idle for 2-3 minutes with NO
crane functions actuated. If the pump outlet becomes
too warm to keep your hand on comfortably, stop the
engine immediately.
4.
Slowly increase the engine speed to approximately 1500
rpm and hold for no longer than 1 minute and make the
same checks as outlined previously.
5.
Slowly increase engine speed to full RPM and hold for
no longer than 1 minute while making the same checks
as outlined previously.
6.
At full engine RPM cycle all functions fully extending and
retracting the cylinders to their stop position to verify
operation and that the pump stays quiet and does not
become excessively hot.
7.
Proceed to the pressure setting procedure.
9237-1
FIGURE 2-8
1
1
CAUTION
Pump or Reservoir Damage!
If the pump displays either excessive noise or vibration it
is probably sucking air into the inlet keeping the pump
from priming. (This is usually accompanied by the pump
increasingly becoming hotter the longer it is being driven
in this condition). If this occurs, stop the engine
immediately and inspect all connections of the suction
hose/tube for a loose connection, or for a missing or
damaged O-ring. Repeat air bleeding and start-up
procedure.
DO NOT retract cylinders with the pump priming tool
connected to the reservoir. The relief function in the
charging tool may not have enough volume to vent the
reservoir due to the large differential area of the cylinder
as it retracts. Irreparable damage to the reservoir may
occur.
The Pump Priming Tool is factory set at 1–2 PSI to lift the
fluid to the inlet of the pumps and to prevent the reservoir
from being over-pressurized and damaged. DO NOT
ATTEMPT TO ADJUST IT. It is necessary to monitor the
pressure gauge to ensure that 2 PSI is not exceeded
during air bleeding and pump start-up to prevent possible
reservoir damage. Again, irreparable damage to the
reservoir may occur.
Fo
r
Reference
Only
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