RG55T-R Operation • Service • Maintenance
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Maintenance
Keep the top breather clean and threaded tightly. A 10 micron
return filter (4) is used on this machine. It is located in the
hydraulic tank and filters oil entering the tank.
Check the oil level only when the machine on level ground.
Changing the Hydraulic Oil
Drain the Oil:
1. Place the machine on level ground, lower the cutter
boom to the ground. SHUT MACHINE OFF.
2. Locate the hydraulic pump (5) which is located t the
front of the engine as shown above.
3. Remove the bottom hose (6) from the pump and allow
the oil to drain into a container (you may use a hose with
a threaded fitting to assist in draining the fluid.
4. Clean and install the hose.
5. Loosen the hose fittings on the cylinders, and drain as
much fluid as feasible.
6. Replace and tighten fittings.
Dispose of drained oil according to local environment
protection regulations.
Re-filling the Hydraulic Oil Tank:
1. Clean all surrounding debris and dirt off of the tank fill
opening area. (Hydraulic fluid must be kept completely
clean!)
2. Unscrew the filter cap (4) and pull out the filter.
Start-Up Procedure
1. Fill the tank until the oil level shows to the line on the
dipstick
2. Replace the filter and cap.
3. Make sure all fittings are tight.
4. Fill the reservoir with the recommended hydrau lic oil (see
“System Fluid Specifications”), which should be passed
through a 10 micron (nom i nal) non-bypass filter prior to
entering the reservoir. Never reuse fluid.
Before operating, please consult the “Safety” section for
vital information related to operating this powerful machine!
5. Crank the engine, using the starter, for a short period
of time. This allows the system to begin filling with fluid.
Start the engine and run at the lowest possible speed.
Shut down the engine within 40 seconds if the pump or
motor begin making an unusual noise, indicating a lack
of oil, and be sure the reservoir is full and all the hoses
are properly connected.
6. Set the engine throttle at approximately 50% of maximum
throttle for a few minutes. This will purge trapped air from
the pump/control valve cir cuit.
7. Cycle the self-propel drive lever, two or three times,
to purge all remaining trapped air from the self-propel
motor circuit.
The hydraulic motor is now ready for operation.
8. Now the hydraulic cylinders circuits may be prepared.
Run the engine at normal operating speed. Using the
cutting boom motion lever, cycle the cylinders through
all their motions until all the air is bled off. The motions
will be smooth and powerful when all of the air is bled
off.
9. Check the reservoir level, and add more clean fluid if
necessary.
The hydraulic system is now completely ready for operation.
10. Clean up any spilled hydraulic fluid.
NOTICE
Prior to filling with fluid, make certain all system
components (reservoir, hoses, valves, fittings,
pump, etc.) are clean.
Care must be taken to not run the pump or
hydraulic motor without the sufficient amount of
fluid.
NOTICE
Keep the interior of all hydraulic components
clean as they are installed. The machine must not
be operated without the filter in place, or sever
damage to the major hydraulic compnents will
likely occur.
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