SAC 3600 Series Operator's Manual page 70

HYDRAULIC FILTRATION
The hydraulic oil used in the hydraulic systems on your 3600 series mixer was selected for its heavy duty operating prop-
erties. This minimizes frequent hydraulic oil changes and extends the life of the hydraulic systems components.
It is recommended to change the hydraulic oil every 1000 hours of regular use or when oil properties degrade. If the
fluid becomes black it is a sign that the fluid is overheating. Also, if the fluid appears to be milky, this is a sign of water
contamination.
If in doubt as to the condition of your hydraulic oil, contact your authorized SAC Dealer or Distributor or your local hy-
draulic service center. A sample of the hydraulic oil can be tested with the correct testing equipment. Good condition
hydraulic oil must meet the following minimum requirements.
your mixer is equipped with remote charge pump filters. It is critical that these filters are changed on a regular
basis to keep the system running normal. The charge filters (2 per unit, located at the front of the truck by the
hydrostatic pumps) must be changed within 20 hours of initial startup or sooner if the display indicator indicates
a pressure drop of unaceptable level (50 psi). The filters must be changed again at 100 hours of use or sooner
if display indicator indicates high pressure drop. After the first two initial filter changes within 100 hours of
startup, the filter changes must occur every 250 hours therafter or sooner if the display indicates a high pressure
drop. If the filter becomes plugged, the filter head will go into bypass mode and direct all fluid flow back to the
tank unfiltered. This condition will not allow for the operation of the system.
The auxiliary circuit filter (located near the cooling fan) must be changed after 50 hours of initial startup and
every 500 hours thereafter.
Changing Hydraulic Oil and Reservoir Maintenance
The following steps should be followed to change the hydraulic fluid and clean the reservoir:
1. Position catch containers under the reservoir below the drain plug. Make sure the ball valves located on the tank are
in the open position. The volume of the hydraulic reservior is large; make sure the
selected conainers are suitable to hold the complete volume of fluid.
RETURN LINES
OPERATION
REPLACEMENT PARTS
1. Water Content in Hydraulic Oil <100 Parts/Million
2. viscosity of Hydraulic Oil +/- 10% of Original Specification
3. ISO Oil Cleanliness Standard of 18/13
Approximate Hydraulic Oil Reservoir Capacity
3675, 3690,
36100 & 36125
COMBINATION OIL LEVEL
& OIL TEMPERATURE GAUGE
90 Gallons (340 litres)
FILLER/BREATHER CAP
SUCTION SCREENS
Page # 70
READ complete manual CAREFULLY
BEFORE attempting operation.