SCAC STS60-23BV - Hydraulic System

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Section 6
B. CHANGING HYDRAULIC OIL
The hydraulic oil should be changed after the first 100 hours
of machine operations and every 500 hours or annually,
whichever occurs first thereafter. The oil should also be
changed if the color of the fluid has become black or milky.
A black color and/or a rancid odor usually indicates possible
overheating of the oil, and a milky color usually indicates
water in the hydraulic oil.
- IMPORTANT -
The hydraulic oil should be changed if you notice
the presence of water or a rancid odor to the
hydraulic oil.
1. Park the machine on a level surface, stop the engine
and remove the ignition key.
2. Place a suitable container under the hydraulic
oil filter. Remove the fill cap from the reservoir.
Remove the drain plug. See Figure 6-3. Allow the
fluid to drain into the container and properly discard
it.
3. Re-install the drain and be sure it is tight.
- NOTE -
Before refilling the hydraulic oil reservoir the
hydraulic oil filter should be changed as outlined
in Procedure C "Changing Hydraulic Oil Filter
Element".
4. Fill the reservoir to full 3" inches below the filler neck
with 20W50 oil (Scag p/n 486255 - 1 Quart or p/n
486254 - 1 Gallon).
5. Replace the reservoir fill cap. Start the engine and
drive forward and backward for two minutes. Check
the oil level in the reservoir. If necessary, add oil to
the reservoir.
6.3 HYDRAULIC SYSTEM
A. CHECKING HYDRAULIC OIL LEVEL
The hydraulic oil level should be checked after the first 8
hours of operation. Thereafter, check the oil after every
200 hours of machine operation or monthly, whichever
occurs first.
- IMPORTANT -
If the oil level is consistently low, check for leaks
and correct immediately.
1. Wipe dirt and contaminants from around the
reservoir cap. Remove the cap from the hydraulic oil
reservoir. See Figure 6-2.
2. Visually check the level of hydraulic oil. Hydraulic
oil should be at least 3" inches from top of the filler
neck. If the level cannot be determined visually, use
a clean tape measure to check the level. If the fluid
is low, add 20W50 oil (Scag p/n 486255 - 1 Quart or
p/n 486254 - 1 Gallon). DO NOT overfill; (overfilling
the oil reservoir may cause oil seepage around the
cap area).
3. Clean the fill cap and install it onto the reservoir.
HYDRAULIC OIL
RESERVOIR
Figure 6-2. Hydraulic Oil Reservoir