Rayco RG74T-R Operator, Service, Maintenance Manual page 43

Hydraulic Oil - Drain
1. Clean the pump, motor, cylinders, hydraulic lines, fittings,
and tank.
2. Place the machine on level ground.
3. Place a container on the ground below the hydraulic
drain plug (5)
4. Remove the breather cap (6) to allow airflow to assist in
draining. Place in a container and allow the oil to drain
into the container.
5. Loosen the hose fittings on the cylinders, and drain as
much fluid as feasible.
6. Replace and tighten the fittings.
Re-fill 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. Remove the breather/fill cap (6).
3. Fill the tank until oil the level reaches the appropriate
level as shown on the oil level gauge.
4. Replace the breather/fill cap.
Hydraulic Oil Filter - Change
800.392.2686
A 10 micron filter (7) is used on this machine (See Service
Parts List). It is located on the external filter head to filter
the oil before entering the hydraulic operating components.
1. Place a pan below the filter to catch dripping oil.
4 2. Using a filter wrench, unscrew the filter from the filter
head.
3. Apply a light coat of hydraulic oil to the gasket of the
new filter.
4. Screw the new filter onto the filter head until hand tight.
5. Tighten further with the filter wrench.
6. Dispose of the used filter and lost oil, in accordance
with local safety and environmental protection laws.
If the filter head ever needs to be replaced, be sure that the
direction of flow, indicated by the arrow on the filter head, is
pointing away from the oil reservoir.
5
Always keep the hydraulic oil clean.
Hydrostat Charge Pump Oil Filter -
Change
8
This filter (8) is located on the bulkhead on the cutter wheel
end of the machine (See Service Parts List). It can be
accessed from underneath the hood.
1. Place a pan below the filter to catch dripping oil.
2. Using a filter wrench, unscrew the filter from the filter
head.
3. Apply a light coat of hydraulic oil to the gasket of the
new filter (See Service Parts List). If the filter head ever
needs to be replaced, be sure that the direction of flow,
indicated by the arrow on the filter head, is sending fluid
to the cutter wheel pump.
7
RG74T-R Operator · Service · Maintenance
Maintenance
43